merge changes for DRTVWR-209

103 files changed, 16884 insertions, 769 deletions

diff --git a/indra/CMakeLists.txt b/indra/CMakeLists.txt
index 1cebb53a07..24c98bfada 100644
--- a/indra/CMakeLists.txt
+++ b/indra/CMakeLists.txt
@@ -43,6 +43,7 @@ add_subdirectory(cmake)
 add_subdirectory(${LIBS_OPEN_PREFIX}llaudio)
 add_subdirectory(${LIBS_OPEN_PREFIX}llcharacter)
 add_subdirectory(${LIBS_OPEN_PREFIX}llcommon)
+add_subdirectory(${LIBS_OPEN_PREFIX}llcorehttp)
 add_subdirectory(${LIBS_OPEN_PREFIX}llimage)
 add_subdirectory(${LIBS_OPEN_PREFIX}llkdu)
 add_subdirectory(${LIBS_OPEN_PREFIX}llimagej2coj)
diff --git a/indra/cmake/Boost.cmake b/indra/cmake/Boost.cmake
index 2135f0584c..2af0bc1b30 100644
--- a/indra/cmake/Boost.cmake
+++ b/indra/cmake/Boost.cmake
@@ -12,12 +12,13 @@ if (STANDALONE)
   set(BOOST_SIGNALS_LIBRARY boost_signals-mt)
   set(BOOST_SYSTEM_LIBRARY boost_system-mt)
   set(BOOST_FILESYSTEM_LIBRARY boost_filesystem-mt)
+  set(BOOST_THREAD_LIBRARY boost_thread-mt)
 else (STANDALONE)
   use_prebuilt_binary(boost)
   set(Boost_INCLUDE_DIRS ${LIBS_PREBUILT_DIR}/include)
 
   if (WINDOWS)
-    set(BOOST_VERSION 1_45)
+    set(BOOST_VERSION 1_48)
     if(MSVC80)
       set(BOOST_PROGRAM_OPTIONS_LIBRARY 
           optimized libboost_program_options-vc80-mt-${BOOST_VERSION}
@@ -37,22 +38,55 @@ else (STANDALONE)
     else(MSVC80)
       # MSVC 10.0 config
       set(BOOST_PROGRAM_OPTIONS_LIBRARY 
-          optimized libboost_program_options-vc100-mt-${BOOST_VERSION}
-          debug libboost_program_options-vc100-mt-gd-${BOOST_VERSION})
+          optimized libboost_program_options-mt
+          debug libboost_program_options-mt-gd)
       set(BOOST_REGEX_LIBRARY
-          optimized libboost_regex-vc100-mt-${BOOST_VERSION}
-          debug libboost_regex-vc100-mt-gd-${BOOST_VERSION})
+          optimized libboost_regex-mt
+          debug libboost_regex-mt-gd)
       set(BOOST_SYSTEM_LIBRARY 
-          optimized libboost_system-vc100-mt-${BOOST_VERSION}
-          debug libboost_system-vc100-mt-gd-${BOOST_VERSION})
+          optimized libboost_system-mt
+          debug libboost_system-mt-gd)
       set(BOOST_FILESYSTEM_LIBRARY 
-          optimized libboost_filesystem-vc100-mt-${BOOST_VERSION}
-          debug libboost_filesystem-vc100-mt-gd-${BOOST_VERSION})    
+          optimized libboost_filesystem-mt
+          debug libboost_filesystem-mt-gd)
+      set(BOOST_THREAD_LIBRARY 
+          optimized libboost_thread-mt
+          debug libboost_thread-mt-gd)
     endif (MSVC80)
-  elseif (DARWIN OR LINUX)
-    set(BOOST_PROGRAM_OPTIONS_LIBRARY boost_program_options)
-    set(BOOST_REGEX_LIBRARY boost_regex)
-    set(BOOST_SYSTEM_LIBRARY boost_system)
-    set(BOOST_FILESYSTEM_LIBRARY boost_filesystem)
+  elseif (LINUX)
+    set(BOOST_PROGRAM_OPTIONS_LIBRARY
+        optimized boost_program_options-mt
+        debug boost_program_options-mt-d)
+    set(BOOST_REGEX_LIBRARY
+        optimized boost_regex-mt
+        debug boost_regex-mt-d)
+    set(BOOST_SYSTEM_LIBRARY
+        optimized boost_system-mt
+        debug boost_system-mt-d)
+    set(BOOST_FILESYSTEM_LIBRARY
+        optimized boost_filesystem-mt
+        debug boost_filesystem-mt-d)
+    set(BOOST_THREAD_LIBRARY
+        optimized boost_thread-mt
+        debug boost_thread-mt-d)
+  elseif (DARWIN)
+    set(BOOST_PROGRAM_OPTIONS_LIBRARY
+        optimized boost_program_options-mt
+        debug boost_program_options-mt-d)
+    set(BOOST_PROGRAM_OPTIONS_LIBRARY
+        optimized boost_program_options-mt
+        debug boost_program_options-mt-d)
+    set(BOOST_REGEX_LIBRARY
+        optimized boost_regex-mt
+        debug boost_regex-mt-d)
+    set(BOOST_SYSTEM_LIBRARY
+        optimized boost_system-mt
+        debug boost_system-mt-d)
+    set(BOOST_FILESYSTEM_LIBRARY
+        optimized boost_filesystem-mt
+        debug boost_filesystem-mt-d)
+    set(BOOST_THREAD_LIBRARY
+        optimized boost_thread-mt
+        debug boost_thread-mt-d)
   endif (WINDOWS)
 endif (STANDALONE)
diff --git a/indra/cmake/Copy3rdPartyLibs.cmake b/indra/cmake/Copy3rdPartyLibs.cmake
index 9f05c4cff2..a5483ba678 100644
--- a/indra/cmake/Copy3rdPartyLibs.cmake
+++ b/indra/cmake/Copy3rdPartyLibs.cmake
@@ -254,6 +254,12 @@ elseif(LINUX)
         libapr-1.so.0
         libaprutil-1.so.0
         libatk-1.0.so
+        libboost_program_options-mt.so.1.48.0
+        libboost_regex-mt.so.1.48.0
+        libboost_thread-mt.so.1.48.0
+        libboost_filesystem-mt.so.1.48.0
+        libboost_signals-mt.so.1.48.0
+        libboost_system-mt.so.1.48.0
         libbreakpad_client.so.0
         libcollada14dom.so
         libcrypto.so.1.0.0
diff --git a/indra/cmake/LLAddBuildTest.cmake b/indra/cmake/LLAddBuildTest.cmake
index 543075db5b..543075db5b 100755..100644
--- a/indra/cmake/LLAddBuildTest.cmake
+++ b/indra/cmake/LLAddBuildTest.cmake
diff --git a/indra/cmake/LLCommon.cmake b/indra/cmake/LLCommon.cmake
index d4694ad37a..8f7bb296ce 100644
--- a/indra/cmake/LLCommon.cmake
+++ b/indra/cmake/LLCommon.cmake
@@ -24,7 +24,7 @@ endif (LINUX)
 
 add_definitions(${TCMALLOC_FLAG})
 
-set(LLCOMMON_LINK_SHARED OFF CACHE BOOL "Build the llcommon target as a shared library.")
+set(LLCOMMON_LINK_SHARED OFF CACHE BOOL "Build the llcommon target as a static library.")
 if(LLCOMMON_LINK_SHARED)
   add_definitions(-DLL_COMMON_LINK_SHARED=1)
 endif(LLCOMMON_LINK_SHARED)
diff --git a/indra/cmake/LLCoreHttp.cmake b/indra/cmake/LLCoreHttp.cmake
new file mode 100644
index 0000000000..61e4b23d98
--- /dev/null
+++ b/indra/cmake/LLCoreHttp.cmake
@@ -0,0 +1,16 @@
+# -*- cmake -*-
+
+include(CARes)
+include(CURL)
+include(OpenSSL)
+include(Boost)
+
+set(LLCOREHTTP_INCLUDE_DIRS
+    ${LIBS_OPEN_DIR}/llcorehttp
+    ${CARES_INCLUDE_DIRS}
+    ${CURL_INCLUDE_DIRS}
+    ${OPENSSL_INCLUDE_DIRS}
+    ${BOOST_INCLUDE_DIRS}
+    )
+
+set(LLCOREHTTP_LIBRARIES llcorehttp)
diff --git a/indra/cmake/LLPrimitive.cmake b/indra/cmake/LLPrimitive.cmake
index f15a2c2649..ab39cbb6be 100644
--- a/indra/cmake/LLPrimitive.cmake
+++ b/indra/cmake/LLPrimitive.cmake
@@ -15,10 +15,10 @@ if (WINDOWS)
         optimized llprimitive
         debug libcollada14dom22-d
         optimized libcollada14dom22
-        debug libboost_filesystem-vc100-mt-gd-1_45
-        optimized libboost_filesystem-vc100-mt-1_45
-        debug libboost_system-vc100-mt-gd-1_45
-        optimized libboost_system-vc100-mt-1_45
+        debug libboost_filesystem-mt-gd
+        optimized libboost_filesystem-mt
+        debug libboost_system-mt-gd
+        optimized libboost_system-mt
         )
 else (WINDOWS)
     set(LLPRIMITIVE_LIBRARIES 
diff --git a/indra/llcommon/linden_common.h b/indra/llcommon/linden_common.h
index 5cfcdab41c..f0a5603d06 100644
--- a/indra/llcommon/linden_common.h
+++ b/indra/llcommon/linden_common.h
@@ -59,4 +59,8 @@
 #include "llerror.h"
 #include "llfile.h"
 
+// Boost 1.45 had version 2 as the default for the filesystem library,
+// 1.48 has version 3 as the default.  Keep compatibility for now.
+#define BOOST_FILESYSTEM_VERSION		2
+
 #endif
diff --git a/indra/llcommon/llapr.h b/indra/llcommon/llapr.h
index af33ce666f..034546c3f3 100644
--- a/indra/llcommon/llapr.h
+++ b/indra/llcommon/llapr.h
@@ -168,7 +168,7 @@ public:
 	void operator -=(Type x) { apr_atomic_sub32(&mData, apr_uint32_t(x)); }
 	void operator +=(Type x) { apr_atomic_add32(&mData, apr_uint32_t(x)); }
 	Type operator ++(int) { return apr_atomic_inc32(&mData); } // Type++
-	Type operator --(int) { return apr_atomic_dec32(&mData); } // Type--
+	Type operator --(int) { return apr_atomic_dec32(&mData); } // approximately --Type (0 if final is 0, non-zero otherwise)
 	
 private:
 	apr_uint32_t mData;
diff --git a/indra/llcommon/llsdserialize.cpp b/indra/llcommon/llsdserialize.cpp
index 7f4f670ed0..6b549e4b6f 100644
--- a/indra/llcommon/llsdserialize.cpp
+++ b/indra/llcommon/llsdserialize.cpp
@@ -1451,9 +1451,12 @@ S32 LLSDBinaryFormatter::format(const LLSD& data, std::ostream& ostr, U32 option
 	}
 
 	case LLSD::TypeUUID:
+	{
 		ostr.put('u');
-		ostr.write((const char*)(&(data.asUUID().mData)), UUID_BYTES);
+		LLSD::UUID value = data.asUUID();
+		ostr.write((const char*)(&value.mData), UUID_BYTES);
 		break;
+	}
 
 	case LLSD::TypeString:
 		ostr.put('s');
diff --git a/indra/llcommon/llthread.cpp b/indra/llcommon/llthread.cpp
index c2fbb544a8..1d56a52c32 100644
--- a/indra/llcommon/llthread.cpp
+++ b/indra/llcommon/llthread.cpp
@@ -71,6 +71,13 @@ LL_COMMON_API void assert_main_thread()
 	}
 }
 
+void LLThread::registerThreadID()
+{
+#if !LL_DARWIN
+	sThreadID = ++sIDIter;
+#endif
+}
+
 //
 // Handed to the APR thread creation function
 //
diff --git a/indra/llcommon/llthread.h b/indra/llcommon/llthread.h
index 115bf47553..5c8bbca2ca 100644
--- a/indra/llcommon/llthread.h
+++ b/indra/llcommon/llthread.h
@@ -88,6 +88,11 @@ public:
 
 	U32 getID() const { return mID; }
 
+	// Called by threads *not* created via LLThread to register some
+	// internal state used by LLMutex.  You must call this once early
+	// in the running thread to prevent collisions with the main thread.
+	static void registerThreadID();
+	
 private:
 	BOOL				mPaused;
 	
diff --git a/indra/llcommon/tests/bitpack_test.cpp b/indra/llcommon/tests/bitpack_test.cpp
index 05289881d0..4c3bc674af 100644
--- a/indra/llcommon/tests/bitpack_test.cpp
+++ b/indra/llcommon/tests/bitpack_test.cpp
@@ -95,6 +95,7 @@ namespace tut
 		ensure("bitPack: individual unpack: 5", unpackbuffer[0] == (U8) str[5]);
 		unpack_bufsize = bitunpack.bitUnpack(unpackbuffer, 8*4); // Life
 		ensure_memory_matches("bitPack: 4 bytes unpack:", unpackbuffer, 4, str+6, 4);
+		ensure("keep compiler quiet", unpack_bufsize == unpack_bufsize);
 	}
 
 	// U32 packing
diff --git a/indra/llcommon/tests/reflection_test.cpp b/indra/llcommon/tests/reflection_test.cpp
index 59491cd1fe..8980ebb1f1 100644
--- a/indra/llcommon/tests/reflection_test.cpp
+++ b/indra/llcommon/tests/reflection_test.cpp
@@ -207,7 +207,7 @@ namespace tut
 			const LLReflective* reflective = property->get(aggregated_data); // Wrong reflective type, should throw exception.
 
 			// useless op to get rid of compiler warning.
-			reflective = NULL;
+			reflective = reflective;
 		}
 		catch(...)
 		{
diff --git a/indra/llcorehttp/CMakeLists.txt b/indra/llcorehttp/CMakeLists.txt
new file mode 100644
index 0000000000..8632a2b722
--- /dev/null
+++ b/indra/llcorehttp/CMakeLists.txt
@@ -0,0 +1,184 @@
+# -*- cmake -*-
+
+project(llcorehttp)
+
+include(00-Common)
+include(GoogleMock)
+include(CURL)
+include(CARes)
+include(OpenSSL)
+include(ZLIB)
+include(LLCoreHttp)
+include(LLAddBuildTest)
+include(LLMessage)
+include(LLCommon)
+include(Tut)
+
+include_directories (${CMAKE_CURRENT_SOURCE_DIR})
+
+include_directories(
+    ${LLMESSAGE_INCLUDE_DIRS}
+    ${LLCOMMON_INCLUDE_DIRS}
+    ${LLCOREHTTP_INCLUDE_DIRS}
+    )
+
+set(llcorehttp_SOURCE_FILES
+    bufferarray.cpp
+    bufferstream.cpp
+    httpcommon.cpp
+    httpheaders.cpp
+    httpoptions.cpp
+    httprequest.cpp
+    httpresponse.cpp
+    _httplibcurl.cpp
+    _httpopcancel.cpp
+    _httpoperation.cpp
+    _httpoprequest.cpp
+    _httpopsetget.cpp
+    _httpopsetpriority.cpp
+    _httppolicy.cpp
+    _httppolicyclass.cpp
+    _httppolicyglobal.cpp
+    _httpreplyqueue.cpp
+    _httprequestqueue.cpp
+    _httpservice.cpp
+    _refcounted.cpp
+    )
+
+set(llcorehttp_HEADER_FILES
+    CMakeLists.txt
+
+    bufferarray.h
+    bufferstream.h
+    httpcommon.h
+    httphandler.h
+    httpheaders.h
+    httpoptions.h
+    httprequest.h
+    httpresponse.h
+    _httpinternal.h
+    _httplibcurl.h
+    _httpopcancel.h
+    _httpoperation.h
+    _httpoprequest.h
+    _httpopsetget.h
+    _httpopsetpriority.h
+    _httppolicy.h
+    _httppolicyclass.h
+    _httppolicyglobal.h
+    _httpreadyqueue.h
+    _httpreplyqueue.h
+    _httprequestqueue.h
+    _httpservice.h
+    _mutex.h
+    _refcounted.h
+    _thread.h
+    )
+
+set_source_files_properties(${llcorehttp_HEADER_FILES}
+                            PROPERTIES HEADER_FILE_ONLY TRUE)
+if (DARWIN OR LINUX)
+  # Boost headers define unused members in condition_variable so...
+  set_source_files_properties(${llcorehttp_SOURCE_FILES}
+                              PROPERTIES COMPILE_FLAGS -Wno-unused-variable)
+endif (DARWIN OR LINUX)
+
+list(APPEND llcorehttp_SOURCE_FILES ${llcorehttp_HEADER_FILES})
+
+add_library (llcorehttp ${llcorehttp_SOURCE_FILES})
+target_link_libraries(
+  llcorehttp
+  ${CURL_LIBRARIES}
+  ${CARES_LIBRARIES}
+  ${OPENSSL_LIBRARIES}
+  ${CRYPTO_LIBRARIES}
+  ${BOOST_THREAD_LIBRARY}
+  )
+
+# tests
+if (LL_TESTS)
+  SET(llcorehttp_TEST_SOURCE_FILES
+      tests/test_allocator.cpp
+      )
+
+  set(llcorehttp_TEST_HEADER_FILS
+      tests/test_httpstatus.hpp
+      tests/test_refcounted.hpp
+      tests/test_httpoperation.hpp
+      tests/test_httprequest.hpp
+      tests/test_httprequestqueue.hpp
+      tests/test_httpheaders.hpp
+      tests/test_bufferarray.hpp
+      tests/test_bufferstream.hpp
+      )
+
+  set_source_files_properties(${llcorehttp_TEST_HEADER_FILES}
+                              PROPERTIES HEADER_FILE_ONLY TRUE)
+
+  list(APPEND llcorehttp_TEST_SOURCE_FILES ${llcorehttp_TEST_HEADER_FILES})
+
+  # LL_ADD_PROJECT_UNIT_TESTS(llcorehttp "${llcorehttp_TEST_SOURCE_FILES}")
+
+  #    set(TEST_DEBUG on)
+  set(test_libs
+      ${LLCOREHTTP_LIBRARIES}
+      ${WINDOWS_LIBRARIES}
+      ${LLMESSAGE_LIBRARIES}
+      ${LLCOMMON_LIBRARIES}
+      ${GOOGLEMOCK_LIBRARIES}
+      ${CURL_LIBRARIES}
+      ${CARES_LIBRARIES}
+      ${OPENSSL_LIBRARIES}
+      ${CRYPTO_LIBRARIES}
+      ${BOOST_THREAD_LIBRARY}
+      )
+
+  LL_ADD_INTEGRATION_TEST(llcorehttp
+                          "${llcorehttp_TEST_SOURCE_FILES}"
+                          "${test_libs}"
+                          ${PYTHON_EXECUTABLE}
+                          "${CMAKE_CURRENT_SOURCE_DIR}/tests/test_llcorehttp_peer.py"
+                          )
+
+  #
+  # Example Programs
+  #
+  SET(llcorehttp_EXAMPLE_SOURCE_FILES
+      examples/http_texture_load.cpp
+      )
+
+  set(example_libs
+      ${LLCOREHTTP_LIBRARIES}
+      ${WINDOWS_LIBRARIES}
+      ${LLMESSAGE_LIBRARIES}
+      ${LLCOMMON_LIBRARIES}
+      ${GOOGLEMOCK_LIBRARIES}
+      ${CURL_LIBRARIES}
+      ${CARES_LIBRARIES}
+      ${OPENSSL_LIBRARIES}
+      ${CRYPTO_LIBRARIES}
+      ${BOOST_THREAD_LIBRARY}
+      )
+
+  add_executable(http_texture_load
+                 ${llcorehttp_EXAMPLE_SOURCE_FILES}
+                 )
+  set_target_properties(http_texture_load
+                        PROPERTIES
+                        RUNTIME_OUTPUT_DIRECTORY "${EXE_STAGING_DIR}"
+                        )
+
+  if (WINDOWS)
+    # The following come from LLAddBuildTest.cmake's INTEGRATION_TEST_xxxx target.
+    set_target_properties(http_texture_load
+                          PROPERTIES
+                          LINK_FLAGS "/debug /NODEFAULTLIB:LIBCMT /SUBSYSTEM:WINDOWS /INCLUDE:__tcmalloc"
+                          LINK_FLAGS_DEBUG "/NODEFAULTLIB:\"LIBCMT;LIBCMTD;MSVCRT\" /INCREMENTAL:NO"
+                          LINK_FLAGS_RELEASE ""
+                          )
+  endif (WINDOWS)
+
+  target_link_libraries(http_texture_load ${example_libs})
+
+endif (LL_TESTS)
+
diff --git a/indra/llcorehttp/_httpinternal.h b/indra/llcorehttp/_httpinternal.h
new file mode 100644
index 0000000000..465e2036b3
--- /dev/null
+++ b/indra/llcorehttp/_httpinternal.h
@@ -0,0 +1,146 @@
+/**
+ * @file _httpinternal.h
+ * @brief Implementation constants and magic numbers
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_INTERNAL_H_
+#define	_LLCORE_HTTP_INTERNAL_H_
+
+
+// If you find this included in a public interface header,
+// something wrong is probably happening.
+
+
+// --------------------------------------------------------------------
+// General library to-do list
+//
+// - Implement policy classes.  Structure is mostly there just didn't
+//   need it for the first consumer.
+// - Consider Removing 'priority' from the request interface.  Its use
+//   in an always active class can lead to starvation of low-priority
+//   requests.  Requires coodination of priority values across all
+//   components that share a class.  Changing priority across threads
+//   is slightly expensive (relative to gain) and hasn't been completely
+//   implemented.  And the major user of priority, texture fetches,
+//   may not really need it.
+// - Set/get for global policy and policy classes is clumsy.  Rework
+//   it heading in a direction that allows for more dynamic behavior.
+// - Move HttpOpRequest::prepareRequest() to HttpLibcurl for the
+//   pedantic.
+// - Update downloader and other long-duration services are going to
+//   need a progress notification.  Initial idea is to introduce a
+//   'repeating request' which can piggyback on another request and
+//   persist until canceled or carrier completes.  Current queue
+//   structures allow an HttpOperation object to be enqueued
+//   repeatedly, so...
+// - Investigate making c-ares' re-implementation of a resolver library
+//   more resilient or more intelligent on Mac.  Part of the DNS failure
+//   lies in here.  The mechanism also looks a little less dynamic
+//   than needed in an environments where networking is changing.
+// - Global optimizations:  'borrowing' connections from other classes,
+//   HTTP pipelining.
+// - Dynamic/control system stuff:  detect problems and self-adjust.
+//   This won't help in the face of the router problems we've looked
+//   at, however.  Detect starvation due to UDP activity and provide
+//   feedback to it.
+//
+// Integration to-do list
+// - LLTextureFetch still needs a major refactor.  The use of
+//   LLQueuedThread makes it hard to inspect workers and do the
+//   resource waiting we're now doing.  Rebuild along simpler lines
+//   some of which are suggested in new commentary at the top of
+//   the main source file.
+// - Expand areas of usage eventually leading to the removal of LLCurl.
+//   Rough order of expansion:
+//   .  Mesh fetch
+//   .  Avatar names
+//   .  Group membership lists
+//   .  Caps access in general
+//   .  'The rest'
+// - Adapt texture cache, image decode and other image consumers to
+//   the BufferArray model to reduce data copying.  Alternatively,
+//   adapt this library to something else.
+//
+// --------------------------------------------------------------------
+
+
+// If '1', internal ready queues will not order ready
+// requests by priority, instead it's first-come-first-served.
+// Reprioritization requests have the side-effect of then
+// putting the modified request at the back of the ready queue.
+
+#define	LLCORE_HTTP_READY_QUEUE_IGNORES_PRIORITY		1
+
+
+namespace LLCore
+{
+
+// Maxium number of policy classes that can be defined.
+// *TODO:  Currently limited to the default class, extend.
+const int HTTP_POLICY_CLASS_LIMIT = 1;
+
+// Debug/informational tracing.  Used both
+// as a global option and in per-request traces.
+const int HTTP_TRACE_OFF = 0;
+const int HTTP_TRACE_LOW = 1;
+const int HTTP_TRACE_CURL_HEADERS = 2;
+const int HTTP_TRACE_CURL_BODIES = 3;
+
+const int HTTP_TRACE_MIN = HTTP_TRACE_OFF;
+const int HTTP_TRACE_MAX = HTTP_TRACE_CURL_BODIES;
+
+// Request retry limits
+const int HTTP_RETRY_COUNT_DEFAULT = 5;
+const int HTTP_RETRY_COUNT_MIN = 0;
+const int HTTP_RETRY_COUNT_MAX = 100;
+
+const int HTTP_REDIRECTS_DEFAULT = 10;
+
+// Timeout value used for both connect and protocol exchange.
+// Retries and time-on-queue are not included and aren't
+// accounted for.
+const long HTTP_REQUEST_TIMEOUT_DEFAULT = 30L;
+const long HTTP_REQUEST_TIMEOUT_MIN = 0L;
+const long HTTP_REQUEST_TIMEOUT_MAX = 3600L;
+
+// Limits on connection counts
+const int HTTP_CONNECTION_LIMIT_DEFAULT = 8;
+const int HTTP_CONNECTION_LIMIT_MIN = 1;
+const int HTTP_CONNECTION_LIMIT_MAX = 256;
+
+// Tuning parameters
+
+// Time worker thread sleeps after a pass through the
+// request, ready and active queues.
+const int HTTP_SERVICE_LOOP_SLEEP_NORMAL_MS = 2;
+
+// Block allocation size (a tuning parameter) is found
+// in bufferarray.h.
+
+// Compatibility controls
+const bool HTTP_ENABLE_LINKSYS_WRT54G_V5_DNS_FIX = true;
+
+}  // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_INTERNAL_H_
diff --git a/indra/llcorehttp/_httplibcurl.cpp b/indra/llcorehttp/_httplibcurl.cpp
new file mode 100644
index 0000000000..6fe0bfc7d1
--- /dev/null
+++ b/indra/llcorehttp/_httplibcurl.cpp
@@ -0,0 +1,373 @@
+/**
+ * @file _httplibcurl.cpp
+ * @brief Internal definitions of the Http libcurl thread
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httplibcurl.h"
+
+#include "httpheaders.h"
+#include "bufferarray.h"
+#include "_httpoprequest.h"
+#include "_httppolicy.h"
+
+#include "llhttpstatuscodes.h"
+
+
+namespace LLCore
+{
+
+
+HttpLibcurl::HttpLibcurl(HttpService * service)
+	: mService(service),
+	  mPolicyCount(0),
+	  mMultiHandles(NULL)
+{}
+
+
+HttpLibcurl::~HttpLibcurl()
+{
+	shutdown();
+	
+	mService = NULL;
+}
+
+
+void HttpLibcurl::shutdown()
+{
+	while (! mActiveOps.empty())
+	{
+		HttpOpRequest * op(* mActiveOps.begin());
+		mActiveOps.erase(mActiveOps.begin());
+
+		cancelRequest(op);
+		op->release();
+	}
+
+	if (mMultiHandles)
+	{
+		for (int policy_class(0); policy_class < mPolicyCount; ++policy_class)
+		{
+			if (mMultiHandles[policy_class])
+			{
+				curl_multi_cleanup(mMultiHandles[policy_class]);
+				mMultiHandles[policy_class] = 0;
+			}
+		}
+
+		delete [] mMultiHandles;
+		mMultiHandles = NULL;
+	}
+
+	mPolicyCount = 0;
+}
+
+
+void HttpLibcurl::start(int policy_count)
+{
+	llassert_always(policy_count <= HTTP_POLICY_CLASS_LIMIT);
+	llassert_always(! mMultiHandles);					// One-time call only
+	
+	mPolicyCount = policy_count;
+	mMultiHandles = new CURLM * [mPolicyCount];
+	for (int policy_class(0); policy_class < mPolicyCount; ++policy_class)
+	{
+		mMultiHandles[policy_class] = curl_multi_init();
+	}
+}
+
+
+// Give libcurl some cycles, invoke it's callbacks, process
+// completed requests finalizing or issuing retries as needed.
+//
+// If active list goes empty *and* we didn't queue any
+// requests for retry, we return a request for a hard
+// sleep otherwise ask for a normal polling interval.
+HttpService::ELoopSpeed HttpLibcurl::processTransport()
+{
+	HttpService::ELoopSpeed	ret(HttpService::REQUEST_SLEEP);
+
+	// Give libcurl some cycles to do I/O & callbacks
+	for (int policy_class(0); policy_class < mPolicyCount; ++policy_class)
+	{
+		if (! mMultiHandles[policy_class])
+			continue;
+		
+		int running(0);
+		CURLMcode status(CURLM_CALL_MULTI_PERFORM);
+		do
+		{
+			running = 0;
+			status = curl_multi_perform(mMultiHandles[policy_class], &running);
+		}
+		while (0 != running && CURLM_CALL_MULTI_PERFORM == status);
+
+		// Run completion on anything done
+		CURLMsg * msg(NULL);
+		int msgs_in_queue(0);
+		while ((msg = curl_multi_info_read(mMultiHandles[policy_class], &msgs_in_queue)))
+		{
+			if (CURLMSG_DONE == msg->msg)
+			{
+				CURL * handle(msg->easy_handle);
+				CURLcode result(msg->data.result);
+
+				if (completeRequest(mMultiHandles[policy_class], handle, result))
+				{
+					// Request is still active, don't get too sleepy
+					ret = HttpService::NORMAL;
+				}
+				handle = NULL;			// No longer valid on return
+			}
+			else if (CURLMSG_NONE == msg->msg)
+			{
+				// Ignore this... it shouldn't mean anything.
+				;
+			}
+			else
+			{
+				LL_WARNS_ONCE("CoreHttp") << "Unexpected message from libcurl.  Msg code:  "
+										  << msg->msg
+										  << LL_ENDL;
+			}
+			msgs_in_queue = 0;
+		}
+	}
+
+	if (! mActiveOps.empty())
+	{
+		ret = HttpService::NORMAL;
+	}
+	return ret;
+}
+
+
+// Caller has provided us with a ref count on op.
+void HttpLibcurl::addOp(HttpOpRequest * op)
+{
+	llassert_always(op->mReqPolicy < mPolicyCount);
+	llassert_always(mMultiHandles[op->mReqPolicy] != NULL);
+	
+	// Create standard handle
+	if (! op->prepareRequest(mService))
+	{
+		// Couldn't issue request, fail with notification
+		// *TODO:  Need failure path
+		return;
+	}
+
+	// Make the request live
+	curl_multi_add_handle(mMultiHandles[op->mReqPolicy], op->mCurlHandle);
+	op->mCurlActive = true;
+	
+	if (op->mTracing > HTTP_TRACE_OFF)
+	{
+		HttpPolicy & policy(mService->getPolicy());
+		
+		LL_INFOS("CoreHttp") << "TRACE, ToActiveQueue, Handle:  "
+							 << static_cast<HttpHandle>(op)
+							 << ", Actives:  " << mActiveOps.size()
+							 << ", Readies:  " << policy.getReadyCount(op->mReqPolicy)
+							 << LL_ENDL;
+	}
+	
+	// On success, make operation active
+	mActiveOps.insert(op);
+}
+
+
+// Implements the transport part of any cancel operation.
+// See if the handle is an active operation and if so,
+// use the more complicated transport-based cancelation
+// method to kill the request.
+bool HttpLibcurl::cancel(HttpHandle handle)
+{
+	HttpOpRequest * op(static_cast<HttpOpRequest *>(handle));
+	active_set_t::iterator it(mActiveOps.find(op));
+	if (mActiveOps.end() == it)
+	{
+		return false;
+	}
+
+	// Cancel request
+	cancelRequest(op);
+
+	// Drop references
+	mActiveOps.erase(it);
+	op->release();
+
+	return true;
+}
+
+
+// *NOTE:  cancelRequest logic parallels completeRequest logic.
+// Keep them synchronized as necessary.  Caller is expected to
+// remove the op from the active list and release the op *after*
+// calling this method.  It must be called first to deliver the
+// op to the reply queue with refcount intact.
+void HttpLibcurl::cancelRequest(HttpOpRequest * op)
+{
+	// Deactivate request
+	op->mCurlActive = false;
+
+	// Detach from multi and recycle handle
+	curl_multi_remove_handle(mMultiHandles[op->mReqPolicy], op->mCurlHandle);
+	curl_easy_cleanup(op->mCurlHandle);
+	op->mCurlHandle = NULL;
+
+	// Tracing
+	if (op->mTracing > HTTP_TRACE_OFF)
+	{
+		LL_INFOS("CoreHttp") << "TRACE, RequestCanceled, Handle:  "
+							 << static_cast<HttpHandle>(op)
+							 << ", Status:  " << op->mStatus.toHex()
+							 << LL_ENDL;
+	}
+
+	// Cancel op and deliver for notification
+	op->cancel();
+}
+
+
+// *NOTE:  cancelRequest logic parallels completeRequest logic.
+// Keep them synchronized as necessary.
+bool HttpLibcurl::completeRequest(CURLM * multi_handle, CURL * handle, CURLcode status)
+{
+	HttpOpRequest * op(NULL);
+	curl_easy_getinfo(handle, CURLINFO_PRIVATE, &op);
+
+	if (handle != op->mCurlHandle || ! op->mCurlActive)
+	{
+		LL_WARNS("CoreHttp") << "libcurl handle and HttpOpRequest handle in disagreement or inactive request."
+							 << "  Handle:  " << static_cast<HttpHandle>(handle)
+							 << LL_ENDL;
+		return false;
+	}
+
+	active_set_t::iterator it(mActiveOps.find(op));
+	if (mActiveOps.end() == it)
+	{
+		LL_WARNS("CoreHttp") << "libcurl completion for request not on active list.  Continuing."
+							 << "  Handle:  " << static_cast<HttpHandle>(handle)
+							 << LL_ENDL;
+		return false;
+	}
+
+	// Deactivate request
+	mActiveOps.erase(it);
+	op->mCurlActive = false;
+
+	// Set final status of request if it hasn't failed by other mechanisms yet
+	if (op->mStatus)
+	{
+		op->mStatus = HttpStatus(HttpStatus::EXT_CURL_EASY, status);
+	}
+	if (op->mStatus)
+	{
+		int http_status(HTTP_OK);
+
+		curl_easy_getinfo(handle, CURLINFO_RESPONSE_CODE, &http_status);
+		if (http_status >= 100 && http_status <= 999)
+		{
+			char * cont_type(NULL);
+			curl_easy_getinfo(handle, CURLINFO_CONTENT_TYPE, &cont_type);
+			if (cont_type)
+			{
+				op->mReplyConType = cont_type;
+			}
+			op->mStatus = HttpStatus(http_status);
+		}
+		else
+		{
+			LL_WARNS("CoreHttp") << "Invalid HTTP response code ("
+								 << http_status << ") received from server."
+								 << LL_ENDL;
+			op->mStatus = HttpStatus(HttpStatus::LLCORE, HE_INVALID_HTTP_STATUS);
+		}
+	}
+
+	// Detach from multi and recycle handle
+	curl_multi_remove_handle(multi_handle, handle);
+	curl_easy_cleanup(handle);
+	op->mCurlHandle = NULL;
+
+	// Tracing
+	if (op->mTracing > HTTP_TRACE_OFF)
+	{
+		LL_INFOS("CoreHttp") << "TRACE, RequestComplete, Handle:  "
+							 << static_cast<HttpHandle>(op)
+							 << ", Status:  " << op->mStatus.toHex()
+							 << LL_ENDL;
+	}
+
+	// Dispatch to next stage
+	HttpPolicy & policy(mService->getPolicy());
+	bool still_active(policy.stageAfterCompletion(op));
+
+	return still_active;
+}
+
+
+int HttpLibcurl::getActiveCount() const
+{
+	return mActiveOps.size();
+}
+
+
+int HttpLibcurl::getActiveCountInClass(int policy_class) const
+{
+	int count(0);
+	
+	for (active_set_t::const_iterator iter(mActiveOps.begin());
+		 mActiveOps.end() != iter;
+		 ++iter)
+	{
+		if ((*iter)->mReqPolicy == policy_class)
+		{
+			++count;
+		}
+	}
+	
+	return count;
+}
+
+
+// ---------------------------------------
+// Free functions
+// ---------------------------------------
+
+
+struct curl_slist * append_headers_to_slist(const HttpHeaders * headers, struct curl_slist * slist)
+{
+	for (HttpHeaders::container_t::const_iterator it(headers->mHeaders.begin());
+
+		headers->mHeaders.end() != it;
+		 ++it)
+	{
+		slist = curl_slist_append(slist, (*it).c_str());
+	}
+	return slist;
+}
+
+
+}  // end namespace LLCore
diff --git a/indra/llcorehttp/_httplibcurl.h b/indra/llcorehttp/_httplibcurl.h
new file mode 100644
index 0000000000..611f029ef5
--- /dev/null
+++ b/indra/llcorehttp/_httplibcurl.h
@@ -0,0 +1,129 @@
+/**
+ * @file _httplibcurl.h
+ * @brief Declarations for internal class providing libcurl transport.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_LIBCURL_H_
+#define	_LLCORE_HTTP_LIBCURL_H_
+
+#include "linden_common.h"		// Modifies curl/curl.h interfaces
+
+#include <curl/curl.h>
+#include <curl/multi.h>
+
+#include <set>
+
+#include "httprequest.h"
+#include "_httpservice.h"
+#include "_httpinternal.h"
+
+
+namespace LLCore
+{
+
+
+class HttpPolicy;
+class HttpOpRequest;
+class HttpHeaders;
+
+
+/// Implements libcurl-based transport for an HttpService instance.
+///
+/// Threading:  Single-threaded.  Other than for construction/destruction,
+/// all methods are expected to be invoked in a single thread, typically
+/// a worker thread of some sort.
+
+class HttpLibcurl
+{
+public:
+	HttpLibcurl(HttpService * service);
+	virtual ~HttpLibcurl();
+
+private:
+	HttpLibcurl(const HttpLibcurl &);			// Not defined
+	void operator=(const HttpLibcurl &);		// Not defined
+
+public:
+	/// Give cycles to libcurl to run active requests.  Completed
+	/// operations (successful or failed) will be retried or handed
+	/// over to the reply queue as final responses.
+	///
+	/// @return			Indication of how long this method is
+	///					willing to wait for next service call.
+	HttpService::ELoopSpeed processTransport();
+
+	/// Add request to the active list.  Caller is expected to have
+	/// provided us with a reference count on the op to hold the
+	/// request.  (No additional references will be added.)
+	void addOp(HttpOpRequest * op);
+
+	/// One-time call to set the number of policy classes to be
+	/// serviced and to create the resources for each.  Value
+	/// must agree with HttpPolicy::setPolicies() call.
+	void start(int policy_count);
+
+	/// Synchronously stop libcurl operations.  All active requests
+	/// are canceled and removed from libcurl's handling.  Easy
+	/// handles are detached from their multi handles and released.
+	/// Multi handles are also released.  Canceled requests are
+	/// completed with canceled status and made available on their
+	/// respective reply queues.
+	///
+	/// Can be restarted with a start() call.
+	void shutdown();
+
+	/// Return global and per-class counts of active requests.
+	int getActiveCount() const;
+	int getActiveCountInClass(int policy_class) const;
+
+	/// Attempt to cancel a request identified by handle.
+	///
+	/// Interface shadows HttpService's method.
+	///
+	/// @return			True if handle was found and operation canceled.
+	///
+	bool cancel(HttpHandle handle);
+
+protected:
+	/// Invoked when libcurl has indicated a request has been processed
+	/// to completion and we need to move the request to a new state.
+	bool completeRequest(CURLM * multi_handle, CURL * handle, CURLcode status);
+
+	/// Invoked to cancel an active request, mainly during shutdown
+	/// and destroy.
+	void cancelRequest(HttpOpRequest * op);
+	
+protected:
+	typedef std::set<HttpOpRequest *> active_set_t;
+	
+protected:
+	HttpService *		mService;				// Simple reference, not owner
+	active_set_t		mActiveOps;
+	int					mPolicyCount;
+	CURLM **			mMultiHandles;
+}; // end class HttpLibcurl
+
+}  // end namespace LLCore
+
+#endif // _LLCORE_HTTP_LIBCURL_H_
diff --git a/indra/llcorehttp/_httpopcancel.cpp b/indra/llcorehttp/_httpopcancel.cpp
new file mode 100644
index 0000000000..c1912eb3db
--- /dev/null
+++ b/indra/llcorehttp/_httpopcancel.cpp
@@ -0,0 +1,73 @@
+/**
+ * @file _httpopcancel.cpp
+ * @brief Definitions for internal class HttpOpCancel
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httpopcancel.h"
+
+#include "httpcommon.h"
+#include "httphandler.h"
+#include "httpresponse.h"
+
+#include "_httpservice.h"
+
+
+namespace LLCore
+{
+
+
+// ==================================
+// HttpOpCancel
+// ==================================
+
+
+HttpOpCancel::HttpOpCancel(HttpHandle handle)
+	: HttpOperation(),
+	  mHandle(handle)
+{}
+
+
+HttpOpCancel::~HttpOpCancel()
+{}
+
+
+// Immediately search for the request on various queues
+// and cancel operations if found.  Return the status of
+// the search and cancel as the status of this request.
+// The canceled request will return a canceled status to
+// its handler.
+void HttpOpCancel::stageFromRequest(HttpService * service)
+{
+	if (! service->cancel(mHandle))
+	{
+		mStatus = HttpStatus(HttpStatus::LLCORE, HE_HANDLE_NOT_FOUND);
+	}
+	
+	addAsReply();
+}
+
+
+}   // end namespace LLCore
+
+		
diff --git a/indra/llcorehttp/_httpopcancel.h b/indra/llcorehttp/_httpopcancel.h
new file mode 100644
index 0000000000..336dfdc573
--- /dev/null
+++ b/indra/llcorehttp/_httpopcancel.h
@@ -0,0 +1,78 @@
+/**
+ * @file _httpopcancel.h
+ * @brief Internal declarations for the HttpOpCancel subclass
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_OPCANCEL_H_
+#define	_LLCORE_HTTP_OPCANCEL_H_
+
+
+#include "linden_common.h"		// Modifies curl/curl.h interfaces
+
+#include "httpcommon.h"
+
+#include <curl/curl.h>
+
+#include "_httpoperation.h"
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+
+/// HttpOpCancel requests that a previously issued request
+/// be canceled, if possible.  This includes active requests
+/// that may be in the middle of an HTTP transaction.  Any
+/// completed request will not be canceled and will return
+/// its final status unchanged and *this* request will complete
+/// with an HE_HANDLE_NOT_FOUND error status.
+
+class HttpOpCancel : public HttpOperation
+{
+public:
+	/// @param	handle	Handle of previously-issued request to
+	///					be canceled.
+	HttpOpCancel(HttpHandle handle);
+
+protected:
+	virtual ~HttpOpCancel();							// Use release()
+	
+private:
+	HttpOpCancel(const HttpOpCancel &);					// Not defined
+	void operator=(const HttpOpCancel &);				// Not defined
+
+public:
+	virtual void stageFromRequest(HttpService *);
+			
+public:
+	// Request data
+	HttpHandle			mHandle;
+};  // end class HttpOpCancel
+
+
+}   // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_OPCANCEL_H_
+
diff --git a/indra/llcorehttp/_httpoperation.cpp b/indra/llcorehttp/_httpoperation.cpp
new file mode 100644
index 0000000000..5cf5bc5930
--- /dev/null
+++ b/indra/llcorehttp/_httpoperation.cpp
@@ -0,0 +1,248 @@
+/**
+ * @file _httpoperation.cpp
+ * @brief Definitions for internal classes based on HttpOperation
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httpoperation.h"
+
+#include "httphandler.h"
+#include "httpresponse.h"
+#include "httprequest.h"
+
+#include "_httprequestqueue.h"
+#include "_httpreplyqueue.h"
+#include "_httpservice.h"
+#include "_httpinternal.h"
+
+#include "lltimer.h"
+
+
+namespace LLCore
+{
+
+
+// ==================================
+// HttpOperation
+// ==================================
+
+
+HttpOperation::HttpOperation()
+	: LLCoreInt::RefCounted(true),
+	  mReplyQueue(NULL),
+	  mUserHandler(NULL),
+	  mReqPolicy(HttpRequest::DEFAULT_POLICY_ID),
+	  mReqPriority(0U),
+	  mTracing(0)
+{
+	mMetricCreated = totalTime();
+}
+
+
+HttpOperation::~HttpOperation()
+{
+	setReplyPath(NULL, NULL);
+}
+
+
+void HttpOperation::setReplyPath(HttpReplyQueue * reply_queue,
+								 HttpHandler * user_handler)
+{
+	if (reply_queue != mReplyQueue)
+	{
+		if (mReplyQueue)
+		{
+			mReplyQueue->release();
+		}
+
+		if (reply_queue)
+		{
+			reply_queue->addRef();
+		}
+
+		mReplyQueue = reply_queue;
+	}
+
+	// Not refcounted
+	mUserHandler = user_handler;
+}
+
+
+
+void HttpOperation::stageFromRequest(HttpService *)
+{
+	// Default implementation should never be called.  This
+	// indicates an operation making a transition that isn't
+	// defined.
+	LL_ERRS("HttpCore") << "Default stageFromRequest method may not be called."
+						<< LL_ENDL;
+}
+
+
+void HttpOperation::stageFromReady(HttpService *)
+{
+	// Default implementation should never be called.  This
+	// indicates an operation making a transition that isn't
+	// defined.
+	LL_ERRS("HttpCore") << "Default stageFromReady method may not be called."
+						<< LL_ENDL;
+}
+
+
+void HttpOperation::stageFromActive(HttpService *)
+{
+	// Default implementation should never be called.  This
+	// indicates an operation making a transition that isn't
+	// defined.
+	LL_ERRS("HttpCore") << "Default stageFromActive method may not be called."
+						<< LL_ENDL;
+}
+
+
+void HttpOperation::visitNotifier(HttpRequest *)
+{
+	if (mUserHandler)
+	{
+		HttpResponse * response = new HttpResponse();
+
+		response->setStatus(mStatus);
+		mUserHandler->onCompleted(static_cast<HttpHandle>(this), response);
+
+		response->release();
+	}
+}
+
+
+HttpStatus HttpOperation::cancel()
+{
+	HttpStatus status;
+
+	return status;
+}
+
+
+void HttpOperation::addAsReply()
+{
+	if (mTracing > HTTP_TRACE_OFF)
+	{
+		LL_INFOS("CoreHttp") << "TRACE, ToReplyQueue, Handle:  "
+							 << static_cast<HttpHandle>(this)
+							 << LL_ENDL;
+	}
+	
+	if (mReplyQueue)
+	{
+		addRef();
+		mReplyQueue->addOp(this);
+	}
+}
+
+
+// ==================================
+// HttpOpStop
+// ==================================
+
+
+HttpOpStop::HttpOpStop()
+	: HttpOperation()
+{}
+
+
+HttpOpStop::~HttpOpStop()
+{}
+
+
+void HttpOpStop::stageFromRequest(HttpService * service)
+{
+	// Do operations
+	service->stopRequested();
+	
+	// Prepare response if needed
+	addAsReply();
+}
+
+
+// ==================================
+// HttpOpNull
+// ==================================
+
+
+HttpOpNull::HttpOpNull()
+	: HttpOperation()
+{}
+
+
+HttpOpNull::~HttpOpNull()
+{}
+
+
+void HttpOpNull::stageFromRequest(HttpService * service)
+{
+	// Perform op
+	// Nothing to perform.  This doesn't fall into the libcurl
+	// ready/active queues, it just bounces over to the reply
+	// queue directly.
+	
+	// Prepare response if needed
+	addAsReply();
+}
+
+
+// ==================================
+// HttpOpSpin
+// ==================================
+
+
+HttpOpSpin::HttpOpSpin(int mode)
+	: HttpOperation(),
+	  mMode(mode)
+{}
+
+
+HttpOpSpin::~HttpOpSpin()
+{}
+
+
+void HttpOpSpin::stageFromRequest(HttpService * service)
+{
+	if (0 == mMode)
+	{
+		// Spin forever
+		while (true)
+		{
+			ms_sleep(100);
+		}
+	}
+	else
+	{
+		ms_sleep(1);			// backoff interlock plumbing a bit
+		this->addRef();
+		if (! service->getRequestQueue().addOp(this))
+		{
+			this->release();
+		}
+	}
+}
+
+
+}   // end namespace LLCore
diff --git a/indra/llcorehttp/_httpoperation.h b/indra/llcorehttp/_httpoperation.h
new file mode 100644
index 0000000000..914627fad0
--- /dev/null
+++ b/indra/llcorehttp/_httpoperation.h
@@ -0,0 +1,262 @@
+/**
+ * @file _httpoperation.h
+ * @brief Internal declarations for HttpOperation and sub-classes
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_OPERATION_H_
+#define	_LLCORE_HTTP_OPERATION_H_
+
+
+#include "httpcommon.h"
+#include "httprequest.h"
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+class HttpReplyQueue;
+class HttpHandler;
+class HttpService;
+
+/// HttpOperation is the base class for all request/reply
+/// pairs.
+///
+/// Operations are expected to be of two types:  immediate
+/// and queued.  Immediate requests go to the singleton
+/// request queue and when picked up by the worker thread
+/// are executed immediately and there results placed on
+/// the supplied reply queue.  Queued requests (namely for
+/// HTTP operations), go to the request queue, are picked
+/// up and moved to a ready queue where they're ordered by
+/// priority and managed by the policy component, are
+/// then activated issuing HTTP requests and moved to an
+/// active list managed by the transport (libcurl) component
+/// and eventually finalized when a response is available
+/// and status and data return via reply queue.
+///
+/// To manage these transitions, derived classes implement
+/// three methods:  stageFromRequest, stageFromReady and
+/// stageFromActive.  Immediate requests will only override
+/// stageFromRequest which will perform the operation and
+/// return the result by invoking addAsReply() to put the
+/// request on a reply queue.  Queued requests will involve
+/// all three stage methods.
+///
+/// Threading:  not thread-safe.  Base and derived classes
+/// provide no locking.  Instances move across threads
+/// via queue-like interfaces that are thread compatible
+/// and those interfaces establish the access rules.
+
+class HttpOperation : public LLCoreInt::RefCounted
+{
+public:
+	/// Threading:  called by a consumer/application thread.
+	HttpOperation();
+
+protected:
+	/// Threading:  called by any thread.
+	virtual ~HttpOperation();							// Use release()
+
+private:
+	HttpOperation(const HttpOperation &);				// Not defined
+	void operator=(const HttpOperation &);				// Not defined
+
+public:
+	/// Register a reply queue and a handler for completion notifications.
+	///
+	/// Invokers of operations that want to receive notification that an
+	/// operation has been completed do so by binding a reply queue and
+	/// a handler object to the request.
+	///
+	/// @param	reply_queue		Pointer to the reply queue where completion
+	///							notifications are to be queued (typically
+	///							by addAsReply()).  This will typically be
+	///							the reply queue referenced by the request
+	///							object.  This method will increment the
+	///							refcount on the queue holding the queue
+	///							until delivery is complete.  Using a reply_queue
+	///							even if the handler is NULL has some benefits
+	///							for memory deallocation by keeping it in the
+	///							originating thread.
+	///
+	/// @param	handler			Possibly NULL pointer to a non-refcounted
+	////						handler object to be invoked (onCompleted)
+	///							when the operation is finished.  Note that
+	///							the handler object is never dereferenced
+	///							by the worker thread.  This is passible data
+	///							until notification is performed.
+	///
+	/// Threading:  called by application thread.
+	///
+	void setReplyPath(HttpReplyQueue * reply_queue,
+					  HttpHandler * handler);
+
+	/// The three possible staging steps in an operation's lifecycle.
+	/// Asynchronous requests like HTTP operations move from the
+	/// request queue to the ready queue via stageFromRequest.  Then
+	/// from the ready queue to the active queue by stageFromReady.  And
+	/// when complete, to the reply queue via stageFromActive and the
+	/// addAsReply utility.
+	///
+	/// Immediate mode operations (everything else) move from the
+	/// request queue to the reply queue directly via stageFromRequest
+	/// and addAsReply with no existence on the ready or active queues.
+	///
+	/// These methods will take out a reference count on the request,
+	/// caller only needs to dispose of its reference when done with
+	/// the request. 
+	///
+	/// Threading:  called by worker thread.
+	///
+	virtual void stageFromRequest(HttpService *);
+	virtual void stageFromReady(HttpService *);
+	virtual void stageFromActive(HttpService *);
+
+	/// Delivers a notification to a handler object on completion.
+	///
+	/// Once a request is complete and it has been removed from its
+	/// reply queue, a handler notification may be delivered by a
+	/// call to HttpRequest::update().  This method does the necessary
+	/// dispatching.
+	///
+	/// Threading:  called by application thread.
+	///
+	virtual void visitNotifier(HttpRequest *);
+
+	/// Cancels the operation whether queued or active.
+	/// Final status of the request becomes canceled (an error) and
+	/// that will be delivered to caller via notification scheme.
+	///
+	/// Threading:  called by worker thread.
+	///
+	virtual HttpStatus cancel();
+	
+protected:
+	/// Delivers request to reply queue on completion.  After this
+	/// call, worker thread no longer accesses the object and it
+	/// is owned by the reply queue.
+	///
+	/// Threading:  called by worker thread.
+	///
+	void addAsReply();
+	
+protected:
+	HttpReplyQueue *			mReplyQueue;			// Have refcount
+	HttpHandler *				mUserHandler;			// Naked pointer
+
+public:
+	// Request Data
+	HttpRequest::policy_t		mReqPolicy;
+	HttpRequest::priority_t		mReqPriority;
+
+	// Reply Data
+	HttpStatus					mStatus;
+
+	// Tracing, debug and metrics
+	HttpTime					mMetricCreated;
+	int							mTracing;
+};  // end class HttpOperation
+
+
+/// HttpOpStop requests the servicing thread to shutdown
+/// operations, cease pulling requests from the request
+/// queue and release shared resources (particularly
+/// those shared via reference count).  The servicing
+/// thread will then exit.  The underlying thread object
+/// remains so that another thread can join on the
+/// servicing thread prior to final cleanup.  The
+/// request *does* generate a reply on the response
+/// queue, if requested.
+
+class HttpOpStop : public HttpOperation
+{
+public:
+	HttpOpStop();
+
+protected:
+	virtual ~HttpOpStop();
+
+private:
+	HttpOpStop(const HttpOpStop &);					// Not defined
+	void operator=(const HttpOpStop &);				// Not defined
+
+public:
+	virtual void stageFromRequest(HttpService *);
+
+};  // end class HttpOpStop
+
+
+/// HttpOpNull is a do-nothing operation used for testing via
+/// a basic loopback pattern.  It's executed immediately by
+/// the servicing thread which bounces a reply back to the
+/// caller without any further delay.
+
+class HttpOpNull : public HttpOperation
+{
+public:
+	HttpOpNull();
+
+protected:
+	virtual ~HttpOpNull();
+
+private:
+	HttpOpNull(const HttpOpNull &);					// Not defined
+	void operator=(const HttpOpNull &);				// Not defined
+
+public:
+	virtual void stageFromRequest(HttpService *);
+
+};  // end class HttpOpNull
+
+
+/// HttpOpSpin is a test-only request that puts the worker
+/// thread into a cpu spin.  Used for unit tests and cleanup
+/// evaluation.  You do not want to use this in production.
+class HttpOpSpin : public HttpOperation
+{
+public:
+	// 0 does a hard spin in the operation
+	// 1 does a soft spin continuously requeuing itself
+	HttpOpSpin(int mode);
+
+protected:
+	virtual ~HttpOpSpin();
+
+private:
+	HttpOpSpin(const HttpOpSpin &);					// Not defined
+	void operator=(const HttpOpSpin &);				// Not defined
+
+public:
+	virtual void stageFromRequest(HttpService *);
+
+protected:
+	int			mMode;
+};  // end class HttpOpSpin
+
+
+}   // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_OPERATION_H_
+
diff --git a/indra/llcorehttp/_httpoprequest.cpp b/indra/llcorehttp/_httpoprequest.cpp
new file mode 100644
index 0000000000..7db19b1841
--- /dev/null
+++ b/indra/llcorehttp/_httpoprequest.cpp
@@ -0,0 +1,906 @@
+/**
+ * @file _httpoprequest.cpp
+ * @brief Definitions for internal class HttpOpRequest
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httpoprequest.h"
+
+#include <cstdio>
+#include <algorithm>
+
+#include "httpcommon.h"
+#include "httphandler.h"
+#include "httpresponse.h"
+#include "bufferarray.h"
+#include "httpheaders.h"
+#include "httpoptions.h"
+
+#include "_httprequestqueue.h"
+#include "_httpreplyqueue.h"
+#include "_httpservice.h"
+#include "_httppolicy.h"
+#include "_httppolicyglobal.h"
+#include "_httplibcurl.h"
+#include "_httpinternal.h"
+
+#include "llhttpstatuscodes.h"
+#include "llproxy.h"
+
+namespace
+{
+
+// Attempts to parse a 'Content-Range:' header.  Caller must already
+// have verified that the header tag is present.  The 'buffer' argument
+// will be processed by strtok_r calls which will modify the buffer.
+//
+// @return		-1 if invalid and response should be dropped, 0 if valid an
+//				correct, 1 if couldn't be parsed.  If 0, the first, last,
+//				and length arguments are also written.  'length' may be
+//				0 if the length wasn't available to the server.
+//
+int parse_content_range_header(char * buffer,
+							   unsigned int * first,
+							   unsigned int * last,
+							   unsigned int * length);
+
+
+// Take data from libcurl's CURLOPT_DEBUGFUNCTION callback and
+// escape and format it for a tracing line in logging.  Absolutely
+// anything including NULs can be in the data.  If @scrub is true,
+// non-printing or non-ascii characters are replaced with spaces
+// otherwise a %XX form of escaping is used.
+void escape_libcurl_debug_data(char * buffer, size_t len, bool scrub,
+							   std::string & safe_line);
+
+
+// OS-neutral string comparisons of various types
+int os_strncasecmp(const char *s1, const char *s2, size_t n);
+int os_strcasecmp(const char *s1, const char *s2);
+char * os_strtok_r(char *str, const char *delim, char **saveptr);
+
+
+static const char * const hdr_whitespace(" \t");
+static const char * const hdr_separator(": \t");
+
+} // end anonymous namespace
+
+
+namespace LLCore
+{
+
+
+HttpOpRequest::HttpOpRequest()
+	: HttpOperation(),
+	  mProcFlags(0U),
+	  mReqMethod(HOR_GET),
+	  mReqBody(NULL),
+	  mReqOffset(0),
+	  mReqLength(0),
+	  mReqHeaders(NULL),
+	  mReqOptions(NULL),
+	  mCurlActive(false),
+	  mCurlHandle(NULL),
+	  mCurlService(NULL),
+	  mCurlHeaders(NULL),
+	  mCurlBodyPos(0),
+	  mReplyBody(NULL),
+	  mReplyOffset(0),
+	  mReplyLength(0),
+	  mReplyFullLength(0),
+	  mReplyHeaders(NULL),
+	  mPolicyRetries(0),
+	  mPolicyRetryAt(HttpTime(0)),
+	  mPolicyRetryLimit(HTTP_RETRY_COUNT_DEFAULT)
+{
+	// *NOTE:  As members are added, retry initialization/cleanup
+	// may need to be extended in @see prepareRequest().
+}
+
+
+
+HttpOpRequest::~HttpOpRequest()
+{
+	if (mReqBody)
+	{
+		mReqBody->release();
+		mReqBody = NULL;
+	}
+	
+	if (mReqOptions)
+	{
+		mReqOptions->release();
+		mReqOptions = NULL;
+	}
+
+	if (mReqHeaders)
+	{
+		mReqHeaders->release();
+		mReqHeaders = NULL;
+	}
+
+	if (mCurlHandle)
+	{
+		curl_easy_cleanup(mCurlHandle);
+		mCurlHandle = NULL;
+	}
+
+	mCurlService = NULL;
+
+	if (mCurlHeaders)
+	{
+		curl_slist_free_all(mCurlHeaders);
+		mCurlHeaders = NULL;
+	}
+
+	if (mReplyBody)
+	{
+		mReplyBody->release();
+		mReplyBody = NULL;
+	}
+
+	if (mReplyHeaders)
+	{
+		mReplyHeaders->release();
+		mReplyHeaders = NULL;
+	}
+}
+
+
+void HttpOpRequest::stageFromRequest(HttpService * service)
+{
+	addRef();
+	service->getPolicy().addOp(this);			// transfers refcount
+}
+
+
+void HttpOpRequest::stageFromReady(HttpService * service)
+{
+	addRef();
+	service->getTransport().addOp(this);		// transfers refcount
+}
+
+
+void HttpOpRequest::stageFromActive(HttpService * service)
+{
+	if (mReplyLength)
+	{
+		// If non-zero, we received and processed a Content-Range
+		// header with the response.  Verify that what it says
+		// is consistent with the received data.
+		if (mReplyLength != mReplyBody->size())
+		{
+			// Not as expected, fail the request
+			mStatus = HttpStatus(HttpStatus::LLCORE, HE_INV_CONTENT_RANGE_HDR);
+		}
+	}
+	
+	if (mCurlHeaders)
+	{
+		// We take these headers out of the request now as they were
+		// allocated originally in this thread and the notifier doesn't
+		// need them.  This eliminates one source of heap moving across
+		// threads.
+
+		curl_slist_free_all(mCurlHeaders);
+		mCurlHeaders = NULL;
+	}
+
+	addAsReply();
+}
+
+
+void HttpOpRequest::visitNotifier(HttpRequest * request)
+{
+	if (mUserHandler)
+	{
+		HttpResponse * response = new HttpResponse();
+		response->setStatus(mStatus);
+		response->setBody(mReplyBody);
+		response->setHeaders(mReplyHeaders);
+		if (mReplyOffset || mReplyLength)
+		{
+			// Got an explicit offset/length in response
+			response->setRange(mReplyOffset, mReplyLength, mReplyFullLength);
+		}
+		response->setContentType(mReplyConType);
+		
+		mUserHandler->onCompleted(static_cast<HttpHandle>(this), response);
+
+		response->release();
+	}
+}
+
+
+HttpStatus HttpOpRequest::cancel()
+{
+	mStatus = HttpStatus(HttpStatus::LLCORE, HE_OP_CANCELED);
+
+	addAsReply();
+
+	return HttpStatus();
+}
+
+
+HttpStatus HttpOpRequest::setupGet(HttpRequest::policy_t policy_id,
+								   HttpRequest::priority_t priority,
+								   const std::string & url,
+								   HttpOptions * options,
+								   HttpHeaders * headers)
+{
+	setupCommon(policy_id, priority, url, NULL, options, headers);
+	mReqMethod = HOR_GET;
+	
+	return HttpStatus();
+}
+
+
+HttpStatus HttpOpRequest::setupGetByteRange(HttpRequest::policy_t policy_id,
+											HttpRequest::priority_t priority,
+											const std::string & url,
+											size_t offset,
+											size_t len,
+											HttpOptions * options,
+											HttpHeaders * headers)
+{
+	setupCommon(policy_id, priority, url, NULL, options, headers);
+	mReqMethod = HOR_GET;
+	mReqOffset = offset;
+	mReqLength = len;
+	if (offset || len)
+	{
+		mProcFlags |= PF_SCAN_RANGE_HEADER;
+	}
+	
+	return HttpStatus();
+}
+
+
+HttpStatus HttpOpRequest::setupPost(HttpRequest::policy_t policy_id,
+									HttpRequest::priority_t priority,
+									const std::string & url,
+									BufferArray * body,
+									HttpOptions * options,
+									HttpHeaders * headers)
+{
+	setupCommon(policy_id, priority, url, body, options, headers);
+	mReqMethod = HOR_POST;
+	
+	return HttpStatus();
+}
+
+
+HttpStatus HttpOpRequest::setupPut(HttpRequest::policy_t policy_id,
+								   HttpRequest::priority_t priority,
+								   const std::string & url,
+								   BufferArray * body,
+								   HttpOptions * options,
+								   HttpHeaders * headers)
+{
+	setupCommon(policy_id, priority, url, body, options, headers);
+	mReqMethod = HOR_PUT;
+	
+	return HttpStatus();
+}
+
+
+void HttpOpRequest::setupCommon(HttpRequest::policy_t policy_id,
+								HttpRequest::priority_t priority,
+								const std::string & url,
+								BufferArray * body,
+								HttpOptions * options,
+								HttpHeaders * headers)
+{
+	mProcFlags = 0U;
+	mReqPolicy = policy_id;
+	mReqPriority = priority;
+	mReqURL = url;
+	if (body)
+	{
+		body->addRef();
+		mReqBody = body;
+	}
+	if (headers && ! mReqHeaders)
+	{
+		headers->addRef();
+		mReqHeaders = headers;
+	}
+	if (options && ! mReqOptions)
+	{
+		options->addRef();
+		mReqOptions = options;
+		if (options->getWantHeaders())
+		{
+			mProcFlags |= PF_SAVE_HEADERS;
+		}
+		mPolicyRetryLimit = options->getRetries();
+		mPolicyRetryLimit = llclamp(mPolicyRetryLimit, HTTP_RETRY_COUNT_MIN, HTTP_RETRY_COUNT_MAX);
+		mTracing = (std::max)(mTracing, llclamp(options->getTrace(), HTTP_TRACE_MIN, HTTP_TRACE_MAX));
+	}
+}
+
+
+// Sets all libcurl options and data for a request.
+//
+// Used both for initial requests and to 'reload' for
+// a retry, generally with a different CURL handle.
+// Junk may be left around from a failed request and that
+// needs to be cleaned out.
+//
+HttpStatus HttpOpRequest::prepareRequest(HttpService * service)
+{
+	// Scrub transport and result data for retried op case
+	mCurlActive = false;
+	mCurlHandle = NULL;
+	mCurlService = NULL;
+	if (mCurlHeaders)
+	{
+		curl_slist_free_all(mCurlHeaders);
+		mCurlHeaders = NULL;
+	}
+	mCurlBodyPos = 0;
+
+	if (mReplyBody)
+	{
+		mReplyBody->release();
+		mReplyBody = NULL;
+	}
+	mReplyOffset = 0;
+	mReplyLength = 0;
+	mReplyFullLength = 0;
+	if (mReplyHeaders)
+	{
+		mReplyHeaders->release();
+		mReplyHeaders = NULL;
+	}
+	mReplyConType.clear();
+	
+	// *FIXME:  better error handling later
+	HttpStatus status;
+
+	// Get policy options
+	HttpPolicyGlobal & policy(service->getPolicy().getGlobalOptions());
+	
+	mCurlHandle = curl_easy_init();
+	curl_easy_setopt(mCurlHandle, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
+	curl_easy_setopt(mCurlHandle, CURLOPT_NOSIGNAL, 1);
+	curl_easy_setopt(mCurlHandle, CURLOPT_NOPROGRESS, 1);
+	curl_easy_setopt(mCurlHandle, CURLOPT_URL, mReqURL.c_str());
+	curl_easy_setopt(mCurlHandle, CURLOPT_PRIVATE, this);
+	curl_easy_setopt(mCurlHandle, CURLOPT_ENCODING, "");
+
+	if (HTTP_ENABLE_LINKSYS_WRT54G_V5_DNS_FIX)
+	{
+		// The Linksys WRT54G V5 router has an issue with frequent
+		// DNS lookups from LAN machines.  If they happen too often,
+		// like for every HTTP request, the router gets annoyed after
+		// about 700 or so requests and starts issuing TCP RSTs to
+		// new connections.  Reuse the DNS lookups for even a few
+		// seconds and no RSTs.
+		curl_easy_setopt(mCurlHandle, CURLOPT_DNS_CACHE_TIMEOUT, 15);
+	}
+	else
+	{
+		// *TODO:  Revisit this old DNS timeout setting - may no longer be valid
+		// I don't think this is valid anymore, the Multi shared DNS
+		// cache is working well.  For the case of naked easy handles,
+		// consider using a shared DNS object.
+		curl_easy_setopt(mCurlHandle, CURLOPT_DNS_CACHE_TIMEOUT, 0);
+	}
+	curl_easy_setopt(mCurlHandle, CURLOPT_AUTOREFERER, 1);
+	curl_easy_setopt(mCurlHandle, CURLOPT_FOLLOWLOCATION, 1);
+	curl_easy_setopt(mCurlHandle, CURLOPT_MAXREDIRS, HTTP_REDIRECTS_DEFAULT);
+	curl_easy_setopt(mCurlHandle, CURLOPT_WRITEFUNCTION, writeCallback);
+	curl_easy_setopt(mCurlHandle, CURLOPT_WRITEDATA, this);
+	curl_easy_setopt(mCurlHandle, CURLOPT_READFUNCTION, readCallback);
+	curl_easy_setopt(mCurlHandle, CURLOPT_READDATA, this);
+	curl_easy_setopt(mCurlHandle, CURLOPT_SSL_VERIFYPEER, 1);
+	curl_easy_setopt(mCurlHandle, CURLOPT_SSL_VERIFYHOST, 0);
+
+	const std::string * opt_value(NULL);
+	long opt_long(0L);
+	policy.get(HttpRequest::GP_LLPROXY, &opt_long);
+	if (opt_long)
+	{
+		// Use the viewer-based thread-safe API which has a
+		// fast/safe check for proxy enable.  Would like to
+		// encapsulate this someway...
+		LLProxy::getInstance()->applyProxySettings(mCurlHandle);
+	}
+	else if (policy.get(HttpRequest::GP_HTTP_PROXY, &opt_value))
+	{
+		// *TODO:  This is fine for now but get fuller socks5/
+		// authentication thing going later....
+		curl_easy_setopt(mCurlHandle, CURLOPT_PROXY, opt_value->c_str());
+		curl_easy_setopt(mCurlHandle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
+	}
+	if (policy.get(HttpRequest::GP_CA_PATH, &opt_value))
+	{
+		curl_easy_setopt(mCurlHandle, CURLOPT_CAPATH, opt_value->c_str());
+	}
+	if (policy.get(HttpRequest::GP_CA_FILE, &opt_value))
+	{
+		curl_easy_setopt(mCurlHandle, CURLOPT_CAINFO, opt_value->c_str());
+	}
+	
+	switch (mReqMethod)
+	{
+	case HOR_GET:
+		curl_easy_setopt(mCurlHandle, CURLOPT_HTTPGET, 1);
+		mCurlHeaders = curl_slist_append(mCurlHeaders, "Connection: keep-alive");
+		mCurlHeaders = curl_slist_append(mCurlHeaders, "Keep-alive: 300");
+		break;
+		
+	case HOR_POST:
+		{
+			curl_easy_setopt(mCurlHandle, CURLOPT_POST, 1);
+			curl_easy_setopt(mCurlHandle, CURLOPT_ENCODING, "");
+			long data_size(0);
+			if (mReqBody)
+			{
+				data_size = mReqBody->size();
+			}
+			curl_easy_setopt(mCurlHandle, CURLOPT_POSTFIELDS, static_cast<void *>(NULL));
+			curl_easy_setopt(mCurlHandle, CURLOPT_POSTFIELDSIZE, data_size);
+			mCurlHeaders = curl_slist_append(mCurlHeaders, "Expect:");
+			mCurlHeaders = curl_slist_append(mCurlHeaders, "Connection: keep-alive");
+			mCurlHeaders = curl_slist_append(mCurlHeaders, "Keep-alive: 300");
+		}
+		break;
+		
+	case HOR_PUT:
+		{
+			curl_easy_setopt(mCurlHandle, CURLOPT_UPLOAD, 1);
+			long data_size(0);
+			if (mReqBody)
+			{
+				data_size = mReqBody->size();
+			}
+			curl_easy_setopt(mCurlHandle, CURLOPT_INFILESIZE, data_size);
+			curl_easy_setopt(mCurlHandle, CURLOPT_POSTFIELDS, (void *) NULL);
+			mCurlHeaders = curl_slist_append(mCurlHeaders, "Expect:");
+			mCurlHeaders = curl_slist_append(mCurlHeaders, "Connection: keep-alive");
+			mCurlHeaders = curl_slist_append(mCurlHeaders, "Keep-alive: 300");
+		}
+		break;
+		
+	default:
+		LL_ERRS("CoreHttp") << "Invalid HTTP method in request:  "
+							<< int(mReqMethod)  << ".  Can't recover."
+							<< LL_ENDL;
+		break;
+	}
+
+	// Tracing
+	if (mTracing >= HTTP_TRACE_CURL_HEADERS)
+	{
+		curl_easy_setopt(mCurlHandle, CURLOPT_VERBOSE, 1);
+		curl_easy_setopt(mCurlHandle, CURLOPT_DEBUGDATA, this);
+		curl_easy_setopt(mCurlHandle, CURLOPT_DEBUGFUNCTION, debugCallback);
+	}
+	
+	// There's a CURLOPT for this now...
+	if ((mReqOffset || mReqLength) && HOR_GET == mReqMethod)
+	{
+		static const char * const fmt1("Range: bytes=%lu-%lu");
+		static const char * const fmt2("Range: bytes=%lu-");
+
+		char range_line[64];
+
+#if LL_WINDOWS
+		_snprintf_s(range_line, sizeof(range_line), sizeof(range_line) - 1,
+					(mReqLength ? fmt1 : fmt2),
+					(unsigned long) mReqOffset, (unsigned long) (mReqOffset + mReqLength - 1));
+#else
+		snprintf(range_line, sizeof(range_line),
+				 (mReqLength ? fmt1 : fmt2),
+				 (unsigned long) mReqOffset, (unsigned long) (mReqOffset + mReqLength - 1));
+#endif // LL_WINDOWS
+		range_line[sizeof(range_line) - 1] = '\0';
+		mCurlHeaders = curl_slist_append(mCurlHeaders, range_line);
+	}
+
+	mCurlHeaders = curl_slist_append(mCurlHeaders, "Pragma:");
+
+	// Request options
+	long timeout(HTTP_REQUEST_TIMEOUT_DEFAULT);
+	if (mReqOptions)
+	{
+		timeout = mReqOptions->getTimeout();
+		timeout = llclamp(timeout, HTTP_REQUEST_TIMEOUT_MIN, HTTP_REQUEST_TIMEOUT_MAX);
+	}
+	curl_easy_setopt(mCurlHandle, CURLOPT_TIMEOUT, timeout);
+	curl_easy_setopt(mCurlHandle, CURLOPT_CONNECTTIMEOUT, timeout);
+
+	// Request headers
+	if (mReqHeaders)
+	{
+		// Caller's headers last to override
+		mCurlHeaders = append_headers_to_slist(mReqHeaders, mCurlHeaders);
+	}
+	curl_easy_setopt(mCurlHandle, CURLOPT_HTTPHEADER, mCurlHeaders);
+
+	if (mProcFlags & (PF_SCAN_RANGE_HEADER | PF_SAVE_HEADERS))
+	{
+		curl_easy_setopt(mCurlHandle, CURLOPT_HEADERFUNCTION, headerCallback);
+		curl_easy_setopt(mCurlHandle, CURLOPT_HEADERDATA, this);
+	}
+	
+	if (status)
+	{
+		mCurlService = service;
+	}
+	return status;
+}
+
+
+size_t HttpOpRequest::writeCallback(void * data, size_t size, size_t nmemb, void * userdata)
+{
+	HttpOpRequest * op(static_cast<HttpOpRequest *>(userdata));
+
+	if (! op->mReplyBody)
+	{
+		op->mReplyBody = new BufferArray();
+	}
+	const size_t req_size(size * nmemb);
+	const size_t write_size(op->mReplyBody->append(static_cast<char *>(data), req_size));
+	return write_size;
+}
+
+		
+size_t HttpOpRequest::readCallback(void * data, size_t size, size_t nmemb, void * userdata)
+{
+	HttpOpRequest * op(static_cast<HttpOpRequest *>(userdata));
+
+	if (! op->mReqBody)
+	{
+		return 0;
+	}
+	const size_t req_size(size * nmemb);
+	const size_t body_size(op->mReqBody->size());
+	if (body_size <= op->mCurlBodyPos)
+	{
+		LL_WARNS("HttpCore") << "Request body position beyond body size.  Aborting request."
+							 << LL_ENDL;
+		return 0;
+	}
+
+	const size_t do_size((std::min)(req_size, body_size - op->mCurlBodyPos));
+	const size_t read_size(op->mReqBody->read(op->mCurlBodyPos, static_cast<char *>(data), do_size));
+	op->mCurlBodyPos += read_size;
+	return read_size;
+}
+
+		
+size_t HttpOpRequest::headerCallback(void * data, size_t size, size_t nmemb, void * userdata)
+{
+	static const char status_line[] = "HTTP/";
+	static const size_t status_line_len = sizeof(status_line) - 1;
+
+	static const char con_ran_line[] = "content-range:";
+	static const size_t con_ran_line_len = sizeof(con_ran_line) - 1;
+
+	HttpOpRequest * op(static_cast<HttpOpRequest *>(userdata));
+
+	const size_t hdr_size(size * nmemb);
+	const char * hdr_data(static_cast<const char *>(data));		// Not null terminated
+
+	if (hdr_size >= status_line_len && ! strncmp(status_line, hdr_data, status_line_len))
+	{
+		// One of possibly several status lines.  Reset what we know and start over
+		// taking results from the last header stanza we receive.
+		op->mReplyOffset = 0;
+		op->mReplyLength = 0;
+		op->mReplyFullLength = 0;
+		op->mStatus = HttpStatus();
+		if (op->mReplyHeaders)
+		{
+			op->mReplyHeaders->mHeaders.clear();
+		}
+	}
+
+	// Nothing in here wants a final CR/LF combination.  Remove
+	// it as much as possible.
+	size_t wanted_hdr_size(hdr_size);
+	if (wanted_hdr_size && '\n' == hdr_data[wanted_hdr_size - 1])
+	{
+		if (--wanted_hdr_size && '\r' == hdr_data[wanted_hdr_size - 1])
+		{
+			--wanted_hdr_size;
+		}
+	}
+	
+	// Save header if caller wants them in the response
+	if (op->mProcFlags & PF_SAVE_HEADERS)
+	{
+		// Save headers in response
+		if (! op->mReplyHeaders)
+		{
+			op->mReplyHeaders = new HttpHeaders;
+		}
+		op->mReplyHeaders->mHeaders.push_back(std::string(hdr_data, wanted_hdr_size));
+	}
+
+	// Detect and parse 'Content-Range' headers
+	if (op->mProcFlags & PF_SCAN_RANGE_HEADER)
+	{
+		char hdr_buffer[128];			// Enough for a reasonable header
+		size_t frag_size((std::min)(wanted_hdr_size, sizeof(hdr_buffer) - 1));
+		
+		memcpy(hdr_buffer, hdr_data, frag_size);
+		hdr_buffer[frag_size] = '\0';
+		if (frag_size > con_ran_line_len &&
+			! os_strncasecmp(hdr_buffer, con_ran_line, con_ran_line_len))
+		{
+			unsigned int first(0), last(0), length(0);
+			int status;
+
+			if (! (status = parse_content_range_header(hdr_buffer, &first, &last, &length)))
+			{
+				// Success, record the fragment position
+				op->mReplyOffset = first;
+				op->mReplyLength = last - first + 1;
+				op->mReplyFullLength = length;
+			}
+			else if (-1 == status)
+			{
+				// Response is badly formed and shouldn't be accepted
+				op->mStatus = HttpStatus(HttpStatus::LLCORE, HE_INV_CONTENT_RANGE_HDR);
+			}
+			else
+			{
+				// Ignore the unparsable.
+				LL_INFOS_ONCE("CoreHttp") << "Problem parsing odd Content-Range header:  '"
+										  << std::string(hdr_data, frag_size)
+										  << "'.  Ignoring."
+										  << LL_ENDL;
+			}
+		}
+	}
+
+	return hdr_size;
+}
+
+
+int HttpOpRequest::debugCallback(CURL * handle, curl_infotype info, char * buffer, size_t len, void * userdata)
+{
+	HttpOpRequest * op(static_cast<HttpOpRequest *>(userdata));
+
+	std::string safe_line;
+	std::string tag;
+	bool logit(false);
+	len = (std::min)(len, size_t(256));					// Keep things reasonable in all cases
+	
+	switch (info)
+	{
+	case CURLINFO_TEXT:
+		if (op->mTracing >= HTTP_TRACE_CURL_HEADERS)
+		{
+			tag = "TEXT";
+			escape_libcurl_debug_data(buffer, len, true, safe_line);
+			logit = true;
+		}
+		break;
+			
+	case CURLINFO_HEADER_IN:
+		if (op->mTracing >= HTTP_TRACE_CURL_HEADERS)
+		{
+			tag = "HEADERIN";
+			escape_libcurl_debug_data(buffer, len, true, safe_line);
+			logit = true;
+		}
+		break;
+			
+	case CURLINFO_HEADER_OUT:
+		if (op->mTracing >= HTTP_TRACE_CURL_HEADERS)
+		{
+			tag = "HEADEROUT";
+			escape_libcurl_debug_data(buffer, 2 * len, true, safe_line);		// Goes out as one line
+			logit = true;
+		}
+		break;
+			
+	case CURLINFO_DATA_IN:
+		if (op->mTracing >= HTTP_TRACE_CURL_HEADERS)
+		{
+			tag = "DATAIN";
+			logit = true;
+			if (op->mTracing >= HTTP_TRACE_CURL_BODIES)
+			{
+				escape_libcurl_debug_data(buffer, len, false, safe_line);
+			}
+			else
+			{
+				std::ostringstream out;
+				out << len << " Bytes";
+				safe_line = out.str();
+			}
+		}
+		break;
+			
+	case CURLINFO_DATA_OUT:
+		if (op->mTracing >= HTTP_TRACE_CURL_HEADERS)
+		{
+			tag = "DATAOUT";
+			logit = true;
+			if (op->mTracing >= HTTP_TRACE_CURL_BODIES)
+			{
+				escape_libcurl_debug_data(buffer, len, false, safe_line);
+			}
+			else
+			{
+				std::ostringstream out;
+				out << len << " Bytes";
+				safe_line = out.str();
+			}
+		}
+		break;
+			
+	default:
+		logit = false;
+		break;
+	}
+
+	if (logit)
+	{
+		LL_INFOS("CoreHttp") << "TRACE, LibcurlDebug, Handle:  "
+							 << static_cast<HttpHandle>(op)
+							 << ", Type:  " << tag
+							 << ", Data:  " << safe_line
+							 << LL_ENDL;
+	}
+		
+	return 0;
+}
+
+
+}   // end namespace LLCore
+
+
+// =======================================
+// Anonymous Namespace
+// =======================================
+
+namespace
+{
+
+int parse_content_range_header(char * buffer,
+							   unsigned int * first,
+							   unsigned int * last,
+							   unsigned int * length)
+{
+	char * tok_state(NULL), * tok(NULL);
+	bool match(true);
+			
+	if (! os_strtok_r(buffer, hdr_separator, &tok_state))
+		match = false;
+	if (match && (tok = os_strtok_r(NULL, hdr_whitespace, &tok_state)))
+		match = 0 == os_strcasecmp("bytes", tok);
+	if (match && ! (tok = os_strtok_r(NULL, " \t", &tok_state)))
+		match = false;
+	if (match)
+	{
+		unsigned int lcl_first(0), lcl_last(0), lcl_len(0);
+
+#if LL_WINDOWS
+		if (3 == sscanf_s(tok, "%u-%u/%u", &lcl_first, &lcl_last, &lcl_len))
+#else
+		if (3 == sscanf(tok, "%u-%u/%u", &lcl_first, &lcl_last, &lcl_len))
+#endif // LL_WINDOWS
+		{
+			if (lcl_first > lcl_last || lcl_last >= lcl_len)
+				return -1;
+			*first = lcl_first;
+			*last = lcl_last;
+			*length = lcl_len;
+			return 0;
+		}
+#if LL_WINDOWS
+		if (2 == sscanf_s(tok, "%u-%u/*", &lcl_first, &lcl_last))
+#else
+		if (2 == sscanf(tok, "%u-%u/*", &lcl_first, &lcl_last))
+#endif	// LL_WINDOWS
+		{
+			if (lcl_first > lcl_last)
+				return -1;
+			*first = lcl_first;
+			*last = lcl_last;
+			*length = 0;
+			return 0;
+		}
+	}
+
+	// Header is there but badly/unexpectedly formed, try to ignore it.
+	return 1;
+}
+
+
+void escape_libcurl_debug_data(char * buffer, size_t len, bool scrub, std::string & safe_line)
+{
+	std::string out;
+	len = (std::min)(len, size_t(200));
+	out.reserve(3 * len);
+	for (int i(0); i < len; ++i)
+	{
+		unsigned char uc(static_cast<unsigned char>(buffer[i]));
+
+		if (uc < 32 || uc > 126)
+		{
+			if (scrub)
+			{
+				out.append(1, ' ');
+			}
+			else
+			{
+				static const char hex[] = "0123456789ABCDEF";
+				char convert[4];
+
+				convert[0] = '%';
+				convert[1] = hex[(uc >> 4) % 16];
+				convert[2] = hex[uc % 16];
+				convert[3] = '\0';
+				out.append(convert);
+			}
+		}
+		else
+		{
+			out.append(1, buffer[i]);
+		}
+	}
+	safe_line.swap(out);
+}
+
+
+int os_strncasecmp(const char *s1, const char *s2, size_t n)
+{
+#if LL_WINDOWS
+	return _strnicmp(s1, s2, n);
+#else
+	return strncasecmp(s1, s2, n);
+#endif	// LL_WINDOWS
+}
+
+
+int os_strcasecmp(const char *s1, const char *s2)
+{
+#if LL_WINDOWS
+	return _stricmp(s1, s2);
+#else
+	return strcasecmp(s1, s2);
+#endif // LL_WINDOWS
+}
+
+
+char * os_strtok_r(char *str, const char *delim, char ** savestate)
+{
+#if LL_WINDOWS
+	return strtok_s(str, delim, savestate);
+#else
+	return strtok_r(str, delim, savestate);
+#endif
+}
+
+
+}  // end anonymous namespace
+
+		
diff --git a/indra/llcorehttp/_httpoprequest.h b/indra/llcorehttp/_httpoprequest.h
new file mode 100644
index 0000000000..7b65d17783
--- /dev/null
+++ b/indra/llcorehttp/_httpoprequest.h
@@ -0,0 +1,219 @@
+/**
+ * @file _httpoprequest.h
+ * @brief Internal declarations for the HttpOpRequest subclass
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_OPREQUEST_H_
+#define	_LLCORE_HTTP_OPREQUEST_H_
+
+
+#include "linden_common.h"		// Modifies curl/curl.h interfaces
+
+#include <string>
+#include <curl/curl.h>
+
+#include "httpcommon.h"
+#include "httprequest.h"
+#include "_httpoperation.h"
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+
+class BufferArray;
+class HttpHeaders;
+class HttpOptions;
+
+
+/// HttpOpRequest requests a supported HTTP method invocation with
+/// option and header overrides.
+///
+/// Essentially an RPC to get an HTTP GET, POST or PUT executed
+/// asynchronously with options to override behaviors and HTTP
+/// headers.
+///
+/// Constructor creates a raw object incapable of useful work.
+/// A subsequent call to one of the setupXXX() methods provides
+/// the information needed to make a working request which can
+/// then be enqueued to a request queue.
+///
+
+class HttpOpRequest : public HttpOperation
+{
+public:
+	HttpOpRequest();
+
+protected:
+	virtual ~HttpOpRequest();							// Use release()
+
+private:
+	HttpOpRequest(const HttpOpRequest &);				// Not defined
+	void operator=(const HttpOpRequest &);				// Not defined
+
+public:
+	enum EMethod
+	{
+		HOR_GET,
+		HOR_POST,
+		HOR_PUT
+	};
+	
+	virtual void stageFromRequest(HttpService *);
+	virtual void stageFromReady(HttpService *);
+	virtual void stageFromActive(HttpService *);
+
+	virtual void visitNotifier(HttpRequest * request);
+			
+public:
+	/// Setup Methods
+	///
+	/// Basically an RPC setup for each type of HTTP method
+	/// invocation with one per method type.  These are
+	/// generally invoked right after construction.
+	///
+	/// Threading:  called by application thread
+	///
+	HttpStatus setupGet(HttpRequest::policy_t policy_id,
+						HttpRequest::priority_t priority,
+						const std::string & url,
+						HttpOptions * options,
+						HttpHeaders * headers);
+	
+	HttpStatus setupGetByteRange(HttpRequest::policy_t policy_id,
+								 HttpRequest::priority_t priority,
+								 const std::string & url,
+								 size_t offset,
+								 size_t len,
+								 HttpOptions * options,
+								 HttpHeaders * headers);
+	
+	HttpStatus setupPost(HttpRequest::policy_t policy_id,
+						 HttpRequest::priority_t priority,
+						 const std::string & url,
+						 BufferArray * body,
+						 HttpOptions * options,
+						 HttpHeaders * headers);
+	
+	HttpStatus setupPut(HttpRequest::policy_t policy_id,
+						HttpRequest::priority_t priority,
+						const std::string & url,
+						BufferArray * body,
+						HttpOptions * options,
+						HttpHeaders * headers);
+
+	// Internal method used to setup the libcurl options for a request.
+	// Does all the libcurl handle setup in one place.
+	//
+	// Threading:  called by worker thread
+	//
+	HttpStatus prepareRequest(HttpService * service);
+	
+	virtual HttpStatus cancel();
+
+protected:
+	// Common setup for all the request methods.
+	//
+	// Threading:  called by application thread
+	//
+	void setupCommon(HttpRequest::policy_t policy_id,
+					 HttpRequest::priority_t priority,
+					 const std::string & url,
+					 BufferArray * body,
+					 HttpOptions * options,
+					 HttpHeaders * headers);
+
+	// libcurl operational callbacks
+	//
+	// Threading:  called by worker thread
+	//
+	static size_t writeCallback(void * data, size_t size, size_t nmemb, void * userdata);
+	static size_t readCallback(void * data, size_t size, size_t nmemb, void * userdata);
+	static size_t headerCallback(void * data, size_t size, size_t nmemb, void * userdata);
+	static int debugCallback(CURL *, curl_infotype info, char * buffer, size_t len, void * userdata);
+
+protected:
+	unsigned int		mProcFlags;
+	static const unsigned int	PF_SCAN_RANGE_HEADER = 0x00000001U;
+	static const unsigned int	PF_SAVE_HEADERS = 0x00000002U;
+
+public:
+	// Request data
+	EMethod				mReqMethod;
+	std::string			mReqURL;
+	BufferArray *		mReqBody;
+	off_t				mReqOffset;
+	size_t				mReqLength;
+	HttpHeaders *		mReqHeaders;
+	HttpOptions *		mReqOptions;
+
+	// Transport data
+	bool				mCurlActive;
+	CURL *				mCurlHandle;
+	HttpService *		mCurlService;
+	curl_slist *		mCurlHeaders;
+	size_t				mCurlBodyPos;
+	
+	// Result data
+	HttpStatus			mStatus;
+	BufferArray *		mReplyBody;
+	off_t				mReplyOffset;
+	size_t				mReplyLength;
+	size_t				mReplyFullLength;
+	HttpHeaders *		mReplyHeaders;
+	std::string			mReplyConType;
+
+	// Policy data
+	int					mPolicyRetries;
+	HttpTime			mPolicyRetryAt;
+	int					mPolicyRetryLimit;
+};  // end class HttpOpRequest
+
+
+/// HttpOpRequestCompare isn't an operation but a uniform comparison
+/// functor for STL containers that order by priority.  Mainly
+/// used for the ready queue container but defined here.
+class HttpOpRequestCompare
+{
+public:
+	bool operator()(const HttpOpRequest * lhs, const HttpOpRequest * rhs)
+		{
+			return lhs->mReqPriority > rhs->mReqPriority;
+		}
+};  // end class HttpOpRequestCompare
+
+
+// ---------------------------------------
+// Free functions
+// ---------------------------------------
+
+// Internal function to append the contents of an HttpHeaders
+// instance to a curl_slist object.
+curl_slist * append_headers_to_slist(const HttpHeaders *, curl_slist * slist);
+
+}   // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_OPREQUEST_H_
+
diff --git a/indra/llcorehttp/_httpopsetget.cpp b/indra/llcorehttp/_httpopsetget.cpp
new file mode 100644
index 0000000000..8198528a9b
--- /dev/null
+++ b/indra/llcorehttp/_httpopsetget.cpp
@@ -0,0 +1,97 @@
+/**
+ * @file _httpopsetget.cpp
+ * @brief Definitions for internal class HttpOpSetGet
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httpopsetget.h"
+
+#include "httpcommon.h"
+
+#include "_httpservice.h"
+#include "_httppolicy.h"
+
+
+namespace LLCore
+{
+
+
+// ==================================
+// HttpOpSetget
+// ==================================
+
+
+HttpOpSetGet::HttpOpSetGet()
+	: HttpOperation(),
+	  mIsGlobal(false),
+	  mDoSet(false),
+	  mSetting(-1),				// Nothing requested
+	  mLongValue(0L)
+{}
+
+
+HttpOpSetGet::~HttpOpSetGet()
+{}
+
+
+void HttpOpSetGet::setupGet(HttpRequest::EGlobalPolicy setting)
+{
+	mIsGlobal = true;
+	mSetting = setting;
+}
+
+
+void HttpOpSetGet::setupSet(HttpRequest::EGlobalPolicy setting, const std::string & value)
+{
+	mIsGlobal = true;
+	mDoSet = true;
+	mSetting = setting;
+	mStrValue = value;
+}
+
+
+void HttpOpSetGet::stageFromRequest(HttpService * service)
+{
+	HttpPolicyGlobal & pol_opt(service->getPolicy().getGlobalOptions());
+	HttpRequest::EGlobalPolicy setting(static_cast<HttpRequest::EGlobalPolicy>(mSetting));
+	
+	if (mDoSet)
+	{
+		mStatus = pol_opt.set(setting, mStrValue);
+	}
+	if (mStatus)
+	{
+		const std::string * value(NULL);
+		if ((mStatus = pol_opt.get(setting, &value)))
+		{
+			mStrValue = *value;
+		}
+	}
+	
+	addAsReply();
+}
+
+
+}   // end namespace LLCore
+
+		
diff --git a/indra/llcorehttp/_httpopsetget.h b/indra/llcorehttp/_httpopsetget.h
new file mode 100644
index 0000000000..6966b9d94e
--- /dev/null
+++ b/indra/llcorehttp/_httpopsetget.h
@@ -0,0 +1,83 @@
+/**
+ * @file _httpopsetget.h
+ * @brief Internal declarations for the HttpOpSetGet subclass
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_OPSETGET_H_
+#define	_LLCORE_HTTP_OPSETGET_H_
+
+
+#include "linden_common.h"		// Modifies curl/curl.h interfaces
+
+#include "httpcommon.h"
+
+#include <curl/curl.h>
+
+#include "_httpoperation.h"
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+
+/// HttpOpSetGet requests dynamic changes to policy and
+/// configuration settings.
+///
+/// *NOTE:  Expect this to change.  Don't really like it yet.
+
+class HttpOpSetGet : public HttpOperation
+{
+public:
+	HttpOpSetGet();
+
+protected:
+	virtual ~HttpOpSetGet();							// Use release()
+
+private:
+	HttpOpSetGet(const HttpOpSetGet &);					// Not defined
+	void operator=(const HttpOpSetGet &);				// Not defined
+
+public:
+	/// Threading:  called by application thread
+	void setupGet(HttpRequest::EGlobalPolicy setting);
+	void setupSet(HttpRequest::EGlobalPolicy setting, const std::string & value);
+
+	virtual void stageFromRequest(HttpService *);
+
+public:
+	// Request data
+	bool				mIsGlobal;
+	bool				mDoSet;
+	int					mSetting;
+	long				mLongValue;
+	std::string			mStrValue;
+
+};  // end class HttpOpSetGet
+
+
+}   // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_OPSETGET_H_
+
diff --git a/indra/llcorehttp/_httpopsetpriority.cpp b/indra/llcorehttp/_httpopsetpriority.cpp
new file mode 100644
index 0000000000..d48c7a0b7d
--- /dev/null
+++ b/indra/llcorehttp/_httpopsetpriority.cpp
@@ -0,0 +1,63 @@
+/**
+ * @file _httpopsetpriority.cpp
+ * @brief Definitions for internal classes based on HttpOpSetPriority
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httpopsetpriority.h"
+
+#include "httpresponse.h"
+#include "httphandler.h"
+#include "_httpservice.h"
+
+
+namespace LLCore
+{
+
+
+HttpOpSetPriority::HttpOpSetPriority(HttpHandle handle, HttpRequest::priority_t priority)
+	: HttpOperation(),
+	  mHandle(handle),
+	  mPriority(priority)
+{}
+
+
+HttpOpSetPriority::~HttpOpSetPriority()
+{}
+
+
+void HttpOpSetPriority::stageFromRequest(HttpService * service)
+{
+	// Do operations
+	if (! service->changePriority(mHandle, mPriority))
+	{
+		// Request not found, fail the final status
+		mStatus = HttpStatus(HttpStatus::LLCORE, HE_HANDLE_NOT_FOUND);
+	}
+	
+	// Move directly to response queue
+	addAsReply();
+}
+
+
+}   // end namespace LLCore
diff --git a/indra/llcorehttp/_httpopsetpriority.h b/indra/llcorehttp/_httpopsetpriority.h
new file mode 100644
index 0000000000..31706b737c
--- /dev/null
+++ b/indra/llcorehttp/_httpopsetpriority.h
@@ -0,0 +1,73 @@
+/**
+ * @file _httpsetpriority.h
+ * @brief Internal declarations for HttpSetPriority
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_SETPRIORITY_H_
+#define	_LLCORE_HTTP_SETPRIORITY_H_
+
+
+#include "httpcommon.h"
+#include "httprequest.h"
+#include "_httpoperation.h"
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+
+/// HttpOpSetPriority is an immediate request that
+/// searches the various queues looking for a given
+/// request handle and changing it's priority if
+/// found.
+///
+/// *NOTE:  This will very likely be removed in the near future
+/// when priority is removed from the library.
+
+class HttpOpSetPriority : public HttpOperation
+{
+public:
+	HttpOpSetPriority(HttpHandle handle, HttpRequest::priority_t priority);
+
+protected:
+	virtual ~HttpOpSetPriority();
+
+private:
+	HttpOpSetPriority(const HttpOpSetPriority &);			// Not defined
+	void operator=(const HttpOpSetPriority &);				// Not defined
+
+public:
+	virtual void stageFromRequest(HttpService *);
+
+protected:
+	// Request Data
+	HttpHandle					mHandle;
+	HttpRequest::priority_t		mPriority;
+}; // end class HttpOpSetPriority
+
+}  // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_SETPRIORITY_H_
+
diff --git a/indra/llcorehttp/_httppolicy.cpp b/indra/llcorehttp/_httppolicy.cpp
new file mode 100644
index 0000000000..76c1e22431
--- /dev/null
+++ b/indra/llcorehttp/_httppolicy.cpp
@@ -0,0 +1,387 @@
+/**
+ * @file _httppolicy.cpp
+ * @brief Internal definitions of the Http policy thread
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "_httppolicy.h"
+
+#include "_httpoprequest.h"
+#include "_httpservice.h"
+#include "_httplibcurl.h"
+#include "_httppolicyclass.h"
+
+#include "lltimer.h"
+
+
+namespace LLCore
+{
+
+
+// Per-policy-class data for a running system.
+// Collection of queues, parameters, history, metrics, etc.
+// for a single policy class.
+//
+// Threading:  accessed only by worker thread
+struct HttpPolicy::State
+{
+public:
+	State()
+		: mConnMax(HTTP_CONNECTION_LIMIT_DEFAULT),
+		  mConnAt(HTTP_CONNECTION_LIMIT_DEFAULT),
+		  mConnMin(1),
+		  mNextSample(0),
+		  mErrorCount(0),
+		  mErrorFactor(0)
+		{}
+	
+	HttpReadyQueue		mReadyQueue;
+	HttpRetryQueue		mRetryQueue;
+
+	HttpPolicyClass		mOptions;
+
+	long				mConnMax;
+	long				mConnAt;
+	long				mConnMin;
+
+	HttpTime			mNextSample;
+	unsigned long		mErrorCount;
+	unsigned long		mErrorFactor;
+};
+
+
+HttpPolicy::HttpPolicy(HttpService * service)
+	: mActiveClasses(0),
+	  mState(NULL),
+	  mService(service)
+{}
+
+
+HttpPolicy::~HttpPolicy()
+{
+	shutdown();
+	
+	mService = NULL;
+}
+
+
+void HttpPolicy::shutdown()
+{
+	for (int policy_class(0); policy_class < mActiveClasses; ++policy_class)
+	{
+		HttpRetryQueue & retryq(mState[policy_class].mRetryQueue);
+		while (! retryq.empty())
+		{
+			HttpOpRequest * op(retryq.top());
+			retryq.pop();
+		
+			op->cancel();
+			op->release();
+		}
+
+		HttpReadyQueue & readyq(mState[policy_class].mReadyQueue);
+		while (! readyq.empty())
+		{
+			HttpOpRequest * op(readyq.top());
+			readyq.pop();
+		
+			op->cancel();
+			op->release();
+		}
+	}
+	delete [] mState;
+	mState = NULL;
+	mActiveClasses = 0;
+}
+
+
+void HttpPolicy::start(const HttpPolicyGlobal & global,
+					   const std::vector<HttpPolicyClass> & classes)
+{
+	llassert_always(! mState);
+
+	mGlobalOptions = global;
+	mActiveClasses = classes.size();
+	mState = new State [mActiveClasses];
+	for (int i(0); i < mActiveClasses; ++i)
+	{
+		mState[i].mOptions = classes[i];
+		mState[i].mConnMax = classes[i].mConnectionLimit;
+		mState[i].mConnAt = mState[i].mConnMax;
+		mState[i].mConnMin = 2;
+	}
+}
+
+
+void HttpPolicy::addOp(HttpOpRequest * op)
+{
+	const int policy_class(op->mReqPolicy);
+	
+	op->mPolicyRetries = 0;
+	mState[policy_class].mReadyQueue.push(op);
+}
+
+
+void HttpPolicy::retryOp(HttpOpRequest * op)
+{
+	static const HttpTime retry_deltas[] =
+		{
+			 250000,			// 1st retry in 0.25 S, etc...
+			 500000,
+			1000000,
+			2000000,
+			5000000				// ... to every 5.0 S.
+		};
+	static const int delta_max(int(LL_ARRAY_SIZE(retry_deltas)) - 1);
+	
+	const HttpTime now(totalTime());
+	const int policy_class(op->mReqPolicy);
+	
+	const HttpTime delta(retry_deltas[llclamp(op->mPolicyRetries, 0, delta_max)]);
+	op->mPolicyRetryAt = now + delta;
+	++op->mPolicyRetries;
+	LL_WARNS("CoreHttp") << "HTTP request " << static_cast<HttpHandle>(op)
+						 << " retry " << op->mPolicyRetries
+						 << " scheduled for +" << (delta / HttpTime(1000))
+						 << " mS.  Status:  " << op->mStatus.toHex()
+						 << LL_ENDL;
+	if (op->mTracing > 0)
+	{
+		LL_INFOS("CoreHttp") << "TRACE, ToRetryQueue, Handle:  "
+							 << static_cast<HttpHandle>(op)
+							 << LL_ENDL;
+	}
+	mState[policy_class].mRetryQueue.push(op);
+}
+
+
+// Attempt to deliver requests to the transport layer.
+//
+// Tries to find HTTP requests for each policy class with
+// available capacity.  Starts with the retry queue first
+// looking for requests that have waited long enough then
+// moves on to the ready queue.
+//
+// If all queues are empty, will return an indication that
+// the worker thread may sleep hard otherwise will ask for
+// normal polling frequency.
+//
+HttpService::ELoopSpeed HttpPolicy::processReadyQueue()
+{
+	const HttpTime now(totalTime());
+	HttpService::ELoopSpeed result(HttpService::REQUEST_SLEEP);
+	HttpLibcurl & transport(mService->getTransport());
+	
+	for (int policy_class(0); policy_class < mActiveClasses; ++policy_class)
+	{
+		State & state(mState[policy_class]);
+		int active(transport.getActiveCountInClass(policy_class));
+		int needed(state.mConnAt - active);		// Expect negatives here
+
+		HttpRetryQueue & retryq(state.mRetryQueue);
+		HttpReadyQueue & readyq(state.mReadyQueue);
+		
+		if (needed > 0)
+		{
+			// First see if we have any retries...
+			while (needed > 0 && ! retryq.empty())
+			{
+				HttpOpRequest * op(retryq.top());
+				if (op->mPolicyRetryAt > now)
+					break;
+			
+				retryq.pop();
+				
+				op->stageFromReady(mService);
+				op->release();
+					
+				--needed;
+			}
+		
+			// Now go on to the new requests...
+			while (needed > 0 && ! readyq.empty())
+			{
+				HttpOpRequest * op(readyq.top());
+				readyq.pop();
+
+				op->stageFromReady(mService);
+				op->release();
+					
+				--needed;
+			}
+		}
+				
+		if (! readyq.empty() || ! retryq.empty())
+		{
+			// If anything is ready, continue looping...
+			result = HttpService::NORMAL;
+		}
+	} // end foreach policy_class
+
+	return result;
+}
+
+
+bool HttpPolicy::changePriority(HttpHandle handle, HttpRequest::priority_t priority)
+{
+	for (int policy_class(0); policy_class < mActiveClasses; ++policy_class)
+	{
+		State & state(mState[policy_class]);
+		// We don't scan retry queue because a priority change there
+		// is meaningless.  The request will be issued based on retry
+		// intervals not priority value, which is now moot.
+		
+		// Scan ready queue for requests that match policy
+		HttpReadyQueue::container_type & c(state.mReadyQueue.get_container());
+		for (HttpReadyQueue::container_type::iterator iter(c.begin()); c.end() != iter;)
+		{
+			HttpReadyQueue::container_type::iterator cur(iter++);
+
+			if (static_cast<HttpHandle>(*cur) == handle)
+			{
+				HttpOpRequest * op(*cur);
+				c.erase(cur);									// All iterators are now invalidated
+				op->mReqPriority = priority;
+				state.mReadyQueue.push(op);						// Re-insert using adapter class
+				return true;
+			}
+		}
+	}
+	
+	return false;
+}
+
+
+bool HttpPolicy::cancel(HttpHandle handle)
+{
+	for (int policy_class(0); policy_class < mActiveClasses; ++policy_class)
+	{
+		State & state(mState[policy_class]);
+
+		// Scan retry queue
+		HttpRetryQueue::container_type & c1(state.mRetryQueue.get_container());
+		for (HttpRetryQueue::container_type::iterator iter(c1.begin()); c1.end() != iter;)
+		{
+			HttpRetryQueue::container_type::iterator cur(iter++);
+
+			if (static_cast<HttpHandle>(*cur) == handle)
+			{
+				HttpOpRequest * op(*cur);
+				c1.erase(cur);									// All iterators are now invalidated
+				op->cancel();
+				op->release();
+				return true;
+			}
+		}
+		
+		// Scan ready queue
+		HttpReadyQueue::container_type & c2(state.mReadyQueue.get_container());
+		for (HttpReadyQueue::container_type::iterator iter(c2.begin()); c2.end() != iter;)
+		{
+			HttpReadyQueue::container_type::iterator cur(iter++);
+
+			if (static_cast<HttpHandle>(*cur) == handle)
+			{
+				HttpOpRequest * op(*cur);
+				c2.erase(cur);									// All iterators are now invalidated
+				op->cancel();
+				op->release();
+				return true;
+			}
+		}
+	}
+	
+	return false;
+}
+
+
+bool HttpPolicy::stageAfterCompletion(HttpOpRequest * op)
+{
+	static const HttpStatus cant_connect(HttpStatus::EXT_CURL_EASY, CURLE_COULDNT_CONNECT);
+	static const HttpStatus cant_res_proxy(HttpStatus::EXT_CURL_EASY, CURLE_COULDNT_RESOLVE_PROXY);
+	static const HttpStatus cant_res_host(HttpStatus::EXT_CURL_EASY, CURLE_COULDNT_RESOLVE_HOST);
+	static const HttpStatus send_error(HttpStatus::EXT_CURL_EASY, CURLE_SEND_ERROR);
+	static const HttpStatus recv_error(HttpStatus::EXT_CURL_EASY, CURLE_RECV_ERROR);
+	static const HttpStatus upload_failed(HttpStatus::EXT_CURL_EASY, CURLE_UPLOAD_FAILED);
+	static const HttpStatus op_timedout(HttpStatus::EXT_CURL_EASY, CURLE_OPERATION_TIMEDOUT);
+	static const HttpStatus post_error(HttpStatus::EXT_CURL_EASY, CURLE_HTTP_POST_ERROR);
+
+	// Retry or finalize
+	if (! op->mStatus)
+	{
+		// If this failed, we might want to retry.  Have to inspect
+		// the status a little more deeply for those reasons worth retrying...
+		if (op->mPolicyRetries < op->mPolicyRetryLimit &&
+			((op->mStatus.isHttpStatus() && op->mStatus.mType >= 499 && op->mStatus.mType <= 599) ||
+			 cant_connect == op->mStatus ||
+			 cant_res_proxy == op->mStatus ||
+			 cant_res_host == op->mStatus ||
+			 send_error == op->mStatus ||
+			 recv_error == op->mStatus ||
+			 upload_failed == op->mStatus ||
+			 op_timedout == op->mStatus ||
+			 post_error == op->mStatus))
+		{
+			// Okay, worth a retry.  We include 499 in this test as
+			// it's the old 'who knows?' error from many grid services...
+			retryOp(op);
+			return true;				// still active/ready
+		}
+	}
+
+	// This op is done, finalize it delivering it to the reply queue...
+	if (! op->mStatus)
+	{
+		LL_WARNS("CoreHttp") << "HTTP request " << static_cast<HttpHandle>(op)
+							 << " failed after " << op->mPolicyRetries
+							 << " retries.  Reason:  " << op->mStatus.toString()
+							 << " (" << op->mStatus.toHex() << ")"
+							 << LL_ENDL;
+	}
+	else if (op->mPolicyRetries)
+	{
+		LL_WARNS("CoreHttp") << "HTTP request " << static_cast<HttpHandle>(op)
+							 << " succeeded on retry " << op->mPolicyRetries << "."
+							 << LL_ENDL;
+	}
+
+	op->stageFromActive(mService);
+	op->release();
+	return false;						// not active
+}
+
+
+int HttpPolicy::getReadyCount(HttpRequest::policy_t policy_class) const
+{
+	if (policy_class < mActiveClasses)
+	{
+		return (mState[policy_class].mReadyQueue.size()
+				+ mState[policy_class].mRetryQueue.size());
+	}
+	return 0;
+}
+
+
+}  // end namespace LLCore
diff --git a/indra/llcorehttp/_httppolicy.h b/indra/llcorehttp/_httppolicy.h
new file mode 100644
index 0000000000..03d92c0b8e
--- /dev/null
+++ b/indra/llcorehttp/_httppolicy.h
@@ -0,0 +1,161 @@
+/**
+ * @file _httppolicy.h
+ * @brief Declarations for internal class enforcing policy decisions.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_POLICY_H_
+#define	_LLCORE_HTTP_POLICY_H_
+
+
+#include "httprequest.h"
+#include "_httpservice.h"
+#include "_httpreadyqueue.h"
+#include "_httpretryqueue.h"
+#include "_httppolicyglobal.h"
+#include "_httppolicyclass.h"
+#include "_httpinternal.h"
+
+
+namespace LLCore
+{
+
+class HttpReadyQueue;
+class HttpOpRequest;
+
+
+/// Implements class-based queuing policies for an HttpService instance.
+///
+/// Threading:  Single-threaded.  Other than for construction/destruction,
+/// all methods are expected to be invoked in a single thread, typically
+/// a worker thread of some sort.
+class HttpPolicy
+{
+public:
+	HttpPolicy(HttpService *);
+	virtual ~HttpPolicy();
+
+private:
+	HttpPolicy(const HttpPolicy &);				// Not defined
+	void operator=(const HttpPolicy &);			// Not defined
+
+public:
+	/// Cancel all ready and retry requests sending them to
+	/// their notification queues.  Release state resources
+	/// making further request handling impossible.
+	///
+	/// Threading:  called by worker thread
+	void shutdown();
+
+	/// Deliver policy definitions and enable handling of
+	/// requests.  One-time call invoked before starting
+	/// the worker thread.
+	///
+	/// Threading:  called by application thread
+	void start(const HttpPolicyGlobal & global,
+			   const std::vector<HttpPolicyClass> & classes);
+
+	/// Give the policy layer some cycles to scan the ready
+	/// queue promoting higher-priority requests to active
+	/// as permited.
+	///
+	/// @return			Indication of how soon this method
+	///					should be called again.
+	///
+	/// Threading:  called by worker thread
+	HttpService::ELoopSpeed processReadyQueue();
+
+	/// Add request to a ready queue.  Caller is expected to have
+	/// provided us with a reference count to hold the request.  (No
+	/// additional references will be added.)
+	///
+	/// OpRequest is owned by the request queue after this call
+	/// and should not be modified by anyone until retrieved
+	/// from queue.
+	///
+	/// Threading:  called by any thread
+	void addOp(HttpOpRequest *);
+
+	/// Similar to addOp, used when a caller wants to retry a
+	/// request that has failed.  It's placed on a special retry
+	/// queue but ordered by retry time not priority.  Otherwise,
+	/// handling is the same and retried operations are considered
+	/// before new ones but that doesn't guarantee completion
+	/// order.
+	///
+	/// Threading:  called by worker thread
+	void retryOp(HttpOpRequest *);
+
+	/// Attempt to change the priority of an earlier request.
+	/// Request that Shadows HttpService's method
+	///
+	/// Threading:  called by worker thread
+	bool changePriority(HttpHandle handle, HttpRequest::priority_t priority);
+
+	/// Attempt to cancel a previous request.
+	/// Shadows HttpService's method as well
+	///
+	/// Threading:  called by worker thread
+	bool cancel(HttpHandle handle);
+
+	/// When transport is finished with an op and takes it off the
+	/// active queue, it is delivered here for dispatch.  Policy
+	/// may send it back to the ready/retry queues if it needs another
+	/// go or we may finalize it and send it on to the reply queue.
+	///
+	/// @return			Returns true of the request is still active
+	///					or ready after staging, false if has been
+	///					sent on to the reply queue.
+	///
+	/// Threading:  called by worker thread
+	bool stageAfterCompletion(HttpOpRequest * op);
+	
+	// Get pointer to global policy options.  Caller is expected
+	// to do context checks like no setting once running.
+	///
+	/// Threading:  called by any thread *but* the object may
+	/// only be modified by the worker thread once running.
+	///
+	HttpPolicyGlobal & getGlobalOptions()
+		{
+			return mGlobalOptions;
+		}
+
+	/// Get ready counts for a particular policy class
+	///
+	/// Threading:  called by worker thread
+	int getReadyCount(HttpRequest::policy_t policy_class) const;
+	
+protected:
+	struct State;
+
+	int									mActiveClasses;
+	State *								mState;
+	HttpService *						mService;				// Naked pointer, not refcounted, not owner
+	HttpPolicyGlobal					mGlobalOptions;
+	
+};  // end class HttpPolicy
+
+}  // end namespace LLCore
+
+#endif // _LLCORE_HTTP_POLICY_H_
diff --git a/indra/llcorehttp/_httppolicyclass.cpp b/indra/llcorehttp/_httppolicyclass.cpp
new file mode 100644
index 0000000000..a23b81322c
--- /dev/null
+++ b/indra/llcorehttp/_httppolicyclass.cpp
@@ -0,0 +1,125 @@
+/**
+ * @file _httppolicyclass.cpp
+ * @brief Definitions for internal class defining class policy option.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httppolicyclass.h"
+
+#include "_httpinternal.h"
+
+
+namespace LLCore
+{
+
+
+HttpPolicyClass::HttpPolicyClass()
+	: mSetMask(0UL),
+	  mConnectionLimit(HTTP_CONNECTION_LIMIT_DEFAULT),
+	  mPerHostConnectionLimit(HTTP_CONNECTION_LIMIT_DEFAULT),
+	  mPipelining(0)
+{}
+
+
+HttpPolicyClass::~HttpPolicyClass()
+{}
+
+
+HttpPolicyClass & HttpPolicyClass::operator=(const HttpPolicyClass & other)
+{
+	if (this != &other)
+	{
+		mSetMask = other.mSetMask;
+		mConnectionLimit = other.mConnectionLimit;
+		mPerHostConnectionLimit = other.mPerHostConnectionLimit;
+		mPipelining = other.mPipelining;
+	}
+	return *this;
+}
+
+
+HttpPolicyClass::HttpPolicyClass(const HttpPolicyClass & other)
+	: mSetMask(other.mSetMask),
+	  mConnectionLimit(other.mConnectionLimit),
+	  mPerHostConnectionLimit(other.mPerHostConnectionLimit),
+	  mPipelining(other.mPipelining)
+{}
+
+
+HttpStatus HttpPolicyClass::set(HttpRequest::EClassPolicy opt, long value)
+{
+	switch (opt)
+	{
+	case HttpRequest::CP_CONNECTION_LIMIT:
+		mConnectionLimit = llclamp(value, long(HTTP_CONNECTION_LIMIT_MIN), long(HTTP_CONNECTION_LIMIT_MAX));
+		break;
+
+	case HttpRequest::CP_PER_HOST_CONNECTION_LIMIT:
+		mPerHostConnectionLimit = llclamp(value, long(HTTP_CONNECTION_LIMIT_MIN), mConnectionLimit);
+		break;
+
+	case HttpRequest::CP_ENABLE_PIPELINING:
+		mPipelining = llclamp(value, 0L, 1L);
+		break;
+
+	default:
+		return HttpStatus(HttpStatus::LLCORE, HE_INVALID_ARG);
+	}
+
+	mSetMask |= 1UL << int(opt);
+	return HttpStatus();
+}
+
+
+HttpStatus HttpPolicyClass::get(HttpRequest::EClassPolicy opt, long * value)
+{
+	static const HttpStatus not_set(HttpStatus::LLCORE, HE_OPT_NOT_SET);
+	long * src(NULL);
+	
+	switch (opt)
+	{
+	case HttpRequest::CP_CONNECTION_LIMIT:
+		src = &mConnectionLimit;
+		break;
+
+	case HttpRequest::CP_PER_HOST_CONNECTION_LIMIT:
+		src = &mPerHostConnectionLimit;
+		break;
+
+	case HttpRequest::CP_ENABLE_PIPELINING:
+		src = &mPipelining;
+		break;
+
+	default:
+		return HttpStatus(HttpStatus::LLCORE, HE_INVALID_ARG);
+	}
+
+	if (! (mSetMask & (1UL << int(opt))))
+		return not_set;
+
+	*value = *src;
+	return HttpStatus();
+}
+
+
+}  // end namespace LLCore
diff --git a/indra/llcorehttp/_httppolicyclass.h b/indra/llcorehttp/_httppolicyclass.h
new file mode 100644
index 0000000000..d175413cbd
--- /dev/null
+++ b/indra/llcorehttp/_httppolicyclass.h
@@ -0,0 +1,59 @@
+/**
+ * @file _httppolicyclass.h
+ * @brief Declarations for internal class defining policy class options.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_POLICY_CLASS_H_
+#define	_LLCORE_HTTP_POLICY_CLASS_H_
+
+
+#include "httprequest.h"
+
+
+namespace LLCore
+{
+
+class HttpPolicyClass
+{
+public:
+	HttpPolicyClass();
+	~HttpPolicyClass();
+
+	HttpPolicyClass & operator=(const HttpPolicyClass &);
+	HttpPolicyClass(const HttpPolicyClass &);			// Not defined
+
+public:
+	HttpStatus set(HttpRequest::EClassPolicy opt, long value);
+	HttpStatus get(HttpRequest::EClassPolicy opt, long * value);
+	
+public:
+	unsigned long				mSetMask;
+	long						mConnectionLimit;
+	long						mPerHostConnectionLimit;
+	long						mPipelining;
+};  // end class HttpPolicyClass
+
+}  // end namespace LLCore
+
+#endif // _LLCORE_HTTP_POLICY_CLASS_H_
diff --git a/indra/llcorehttp/_httppolicyglobal.cpp b/indra/llcorehttp/_httppolicyglobal.cpp
new file mode 100644
index 0000000000..72f409d3b1
--- /dev/null
+++ b/indra/llcorehttp/_httppolicyglobal.cpp
@@ -0,0 +1,175 @@
+/**
+ * @file _httppolicyglobal.cpp
+ * @brief Definitions for internal class defining global policy option.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httppolicyglobal.h"
+
+#include "_httpinternal.h"
+
+
+namespace LLCore
+{
+
+
+HttpPolicyGlobal::HttpPolicyGlobal()
+	: mSetMask(0UL),
+	  mConnectionLimit(HTTP_CONNECTION_LIMIT_DEFAULT),
+	  mTrace(HTTP_TRACE_OFF),
+	  mUseLLProxy(0)
+{}
+
+
+HttpPolicyGlobal::~HttpPolicyGlobal()
+{}
+
+
+HttpPolicyGlobal & HttpPolicyGlobal::operator=(const HttpPolicyGlobal & other)
+{
+	if (this != &other)
+	{
+		mSetMask = other.mSetMask;
+		mConnectionLimit = other.mConnectionLimit;
+		mCAPath = other.mCAPath;
+		mCAFile = other.mCAFile;
+		mHttpProxy = other.mHttpProxy;
+		mTrace = other.mTrace;
+		mUseLLProxy = other.mUseLLProxy;
+	}
+	return *this;
+}
+
+
+HttpStatus HttpPolicyGlobal::set(HttpRequest::EGlobalPolicy opt, long value)
+{
+	switch (opt)
+	{
+	case HttpRequest::GP_CONNECTION_LIMIT:
+		mConnectionLimit = llclamp(value, long(HTTP_CONNECTION_LIMIT_MIN), long(HTTP_CONNECTION_LIMIT_MAX));
+		break;
+
+	case HttpRequest::GP_TRACE:
+		mTrace = llclamp(value, long(HTTP_TRACE_MIN), long(HTTP_TRACE_MAX));
+		break;
+
+	case HttpRequest::GP_LLPROXY:
+		mUseLLProxy = llclamp(value, 0L, 1L);
+		break;
+
+	default:
+		return HttpStatus(HttpStatus::LLCORE, HE_INVALID_ARG);
+	}
+
+	mSetMask |= 1UL << int(opt);
+	return HttpStatus();
+}
+
+
+HttpStatus HttpPolicyGlobal::set(HttpRequest::EGlobalPolicy opt, const std::string & value)
+{
+	switch (opt)
+	{
+	case HttpRequest::GP_CA_PATH:
+		mCAPath = value;
+		break;
+
+	case HttpRequest::GP_CA_FILE:
+		mCAFile = value;
+		break;
+
+	case HttpRequest::GP_HTTP_PROXY:
+		mCAFile = value;
+		break;
+
+	default:
+		return HttpStatus(HttpStatus::LLCORE, HE_INVALID_ARG);
+	}
+	
+	mSetMask |= 1UL << int(opt);
+	return HttpStatus();
+}
+
+
+HttpStatus HttpPolicyGlobal::get(HttpRequest::EGlobalPolicy opt, long * value)
+{
+	static const HttpStatus not_set(HttpStatus::LLCORE, HE_OPT_NOT_SET);
+	long * src(NULL);
+	
+	switch (opt)
+	{
+	case HttpRequest::GP_CONNECTION_LIMIT:
+		src = &mConnectionLimit;
+		break;
+
+	case HttpRequest::GP_TRACE:
+		src = &mTrace;
+		break;
+
+	case HttpRequest::GP_LLPROXY:
+		src = &mUseLLProxy;
+		break;
+
+	default:
+		return HttpStatus(HttpStatus::LLCORE, HE_INVALID_ARG);
+	}
+
+	if (! (mSetMask & (1UL << int(opt))))
+		return not_set;
+
+	*value = *src;
+	return HttpStatus();
+}
+
+
+HttpStatus HttpPolicyGlobal::get(HttpRequest::EGlobalPolicy opt, const std::string ** value)
+{
+	static const HttpStatus not_set(HttpStatus::LLCORE, HE_OPT_NOT_SET);
+	const std::string * src(NULL);
+
+	switch (opt)
+	{
+	case HttpRequest::GP_CA_PATH:
+		src = &mCAPath;
+		break;
+
+	case HttpRequest::GP_CA_FILE:
+		src = &mCAFile;
+		break;
+
+	case HttpRequest::GP_HTTP_PROXY:
+		src = &mHttpProxy;
+		break;
+
+	default:
+		return HttpStatus(HttpStatus::LLCORE, HE_INVALID_ARG);
+	}
+	
+	if (! (mSetMask & (1UL << int(opt))))
+		return not_set;
+
+	*value = src;
+	return HttpStatus();
+}
+
+}  // end namespace LLCore
diff --git a/indra/llcorehttp/_httppolicyglobal.h b/indra/llcorehttp/_httppolicyglobal.h
new file mode 100644
index 0000000000..a50d0e4188
--- /dev/null
+++ b/indra/llcorehttp/_httppolicyglobal.h
@@ -0,0 +1,66 @@
+/**
+ * @file _httppolicyglobal.h
+ * @brief Declarations for internal class defining global policy option.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_POLICY_GLOBAL_H_
+#define	_LLCORE_HTTP_POLICY_GLOBAL_H_
+
+
+#include "httprequest.h"
+
+
+namespace LLCore
+{
+
+class HttpPolicyGlobal
+{
+public:
+	HttpPolicyGlobal();
+	~HttpPolicyGlobal();
+
+	HttpPolicyGlobal & operator=(const HttpPolicyGlobal &);
+	
+private:
+	HttpPolicyGlobal(const HttpPolicyGlobal &);			// Not defined
+
+public:
+	HttpStatus set(HttpRequest::EGlobalPolicy opt, long value);
+	HttpStatus set(HttpRequest::EGlobalPolicy opt, const std::string & value);
+	HttpStatus get(HttpRequest::EGlobalPolicy opt, long * value);
+	HttpStatus get(HttpRequest::EGlobalPolicy opt, const std::string ** value);
+	
+public:
+	unsigned long		mSetMask;
+	long				mConnectionLimit;
+	std::string			mCAPath;
+	std::string			mCAFile;
+	std::string			mHttpProxy;
+	long				mTrace;
+	long				mUseLLProxy;
+};  // end class HttpPolicyGlobal
+
+}  // end namespace LLCore
+
+#endif // _LLCORE_HTTP_POLICY_GLOBAL_H_
diff --git a/indra/llcorehttp/_httpreadyqueue.h b/indra/llcorehttp/_httpreadyqueue.h
new file mode 100644
index 0000000000..5f19a9c5f9
--- /dev/null
+++ b/indra/llcorehttp/_httpreadyqueue.h
@@ -0,0 +1,124 @@
+/**
+ * @file _httpreadyqueue.h
+ * @brief Internal declaration for the operation ready queue
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_READY_QUEUE_H_
+#define	_LLCORE_HTTP_READY_QUEUE_H_
+
+
+#include <queue>
+
+#include "_httpinternal.h"
+#include "_httpoprequest.h"
+
+
+namespace LLCore
+{
+
+/// HttpReadyQueue provides a simple priority queue for HttpOpRequest objects.
+///
+/// This uses the priority_queue adaptor class to provide the queue
+/// as well as the ordering scheme while allowing us access to the
+/// raw container if we follow a few simple rules.  One of the more
+/// important of those rules is that any iterator becomes invalid
+/// on element erasure.  So pay attention.
+///
+/// If LLCORE_HTTP_READY_QUEUE_IGNORES_PRIORITY tests true, the class
+/// implements a std::priority_queue interface but on std::deque
+/// behavior to eliminate sensitivity to priority.  In the future,
+/// this will likely become the only behavior or it may become
+/// a run-time election.
+///
+/// Threading:  not thread-safe.  Expected to be used entirely by
+/// a single thread, typically a worker thread of some sort.
+
+#if LLCORE_HTTP_READY_QUEUE_IGNORES_PRIORITY
+
+typedef std::deque<HttpOpRequest *> HttpReadyQueueBase;
+
+#else
+
+typedef std::priority_queue<HttpOpRequest *,
+							std::deque<HttpOpRequest *>,
+							LLCore::HttpOpRequestCompare> HttpReadyQueueBase;
+
+#endif // LLCORE_HTTP_READY_QUEUE_IGNORES_PRIORITY
+
+class HttpReadyQueue : public HttpReadyQueueBase
+{
+public:
+	HttpReadyQueue()
+		: HttpReadyQueueBase()
+		{}
+	
+	~HttpReadyQueue()
+		{}
+	
+protected:
+	HttpReadyQueue(const HttpReadyQueue &);		// Not defined
+	void operator=(const HttpReadyQueue &);		// Not defined
+
+public:
+
+#if LLCORE_HTTP_READY_QUEUE_IGNORES_PRIORITY
+	// Types and methods needed to make a std::deque look
+	// more like a std::priority_queue, at least for our
+	// purposes.
+	typedef HttpReadyQueueBase container_type;
+	
+	const_reference top() const
+		{
+			return front();
+		}
+
+	void pop()
+		{
+			pop_front();
+		}
+
+	void push(const value_type & v)
+		{
+			push_back(v);
+		}
+	
+#endif // LLCORE_HTTP_READY_QUEUE_IGNORES_PRIORITY
+	
+	const container_type & get_container() const
+		{
+			return *this;
+		}
+
+	container_type & get_container()
+		{
+			return *this;
+		}
+	
+}; // end class HttpReadyQueue
+
+
+}  // end namespace LLCore
+
+
+#endif	// _LLCORE_HTTP_READY_QUEUE_H_
diff --git a/indra/llcorehttp/_httpreplyqueue.cpp b/indra/llcorehttp/_httpreplyqueue.cpp
new file mode 100644
index 0000000000..558b7bdee9
--- /dev/null
+++ b/indra/llcorehttp/_httpreplyqueue.cpp
@@ -0,0 +1,107 @@
+/**
+ * @file _httpreplyqueue.cpp
+ * @brief Internal definitions for the operation reply queue
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httpreplyqueue.h"
+
+
+#include "_mutex.h"
+#include "_thread.h"
+#include "_httpoperation.h"
+
+using namespace LLCoreInt;
+
+
+namespace LLCore
+{
+
+
+HttpReplyQueue::HttpReplyQueue()
+	: RefCounted(true)
+{
+}
+
+
+HttpReplyQueue::~HttpReplyQueue()
+{
+	while (! mQueue.empty())
+	{
+		HttpOperation * op = mQueue.back();
+		mQueue.pop_back();
+		op->release();
+	}
+}
+
+
+void HttpReplyQueue::addOp(HttpOperation * op)
+{
+	{
+		HttpScopedLock lock(mQueueMutex);
+
+		mQueue.push_back(op);
+	}
+	mQueueCV.notify_all();
+}
+
+
+HttpOperation * HttpReplyQueue::fetchOp()
+{
+	HttpOperation * result(NULL);
+
+	{
+		HttpScopedLock lock(mQueueMutex);
+
+		if (mQueue.empty())
+			return NULL;
+
+		result = mQueue.front();
+		mQueue.erase(mQueue.begin());
+	}
+
+	// Caller also acquires the reference count
+	return result;
+}
+
+
+void HttpReplyQueue::fetchAll(OpContainer & ops)
+{
+	// Not valid putting something back on the queue...
+	llassert_always(ops.empty());
+
+	{
+		HttpScopedLock lock(mQueueMutex);
+
+		if (! mQueue.empty())
+		{
+			mQueue.swap(ops);
+		}
+	}
+
+	// Caller also acquires the reference counts on each op.
+	return;
+}
+
+
+}  // end namespace LLCore
diff --git a/indra/llcorehttp/_httpreplyqueue.h b/indra/llcorehttp/_httpreplyqueue.h
new file mode 100644
index 0000000000..4220a09a3b
--- /dev/null
+++ b/indra/llcorehttp/_httpreplyqueue.h
@@ -0,0 +1,108 @@
+/**
+ * @file _httpreplyqueue.h
+ * @brief Internal declarations for the operation reply queue.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_REPLY_QUEUE_H_
+#define	_LLCORE_HTTP_REPLY_QUEUE_H_
+
+
+#include "_refcounted.h"
+#include "_mutex.h"
+
+
+namespace LLCore
+{
+
+
+class HttpOperation;
+
+
+/// Almost identical to the HttpRequestQueue class but
+/// whereas that class is a singleton and is known to the
+/// HttpService object, this queue is 1:1 with HttpRequest
+/// instances and isn't explicitly referenced by the
+/// service object.  Instead, HttpOperation objects that
+/// want to generate replies back to their creators also
+/// keep references to the corresponding HttpReplyQueue.
+/// The HttpService plumbing then simply delivers replies
+/// to the requested reply queue.
+///
+/// One result of that is that the fetch operations do
+/// not have a wait forever option.  The service object
+/// doesn't keep handles on everything it would need to
+/// notify so it can't wake up sleepers should it need to
+/// shutdown.  So only non-blocking or timed-blocking modes
+/// are anticipated.  These are how most application consumers
+/// will be coded anyway so it shouldn't be too much of a
+/// burden.
+
+class HttpReplyQueue : public LLCoreInt::RefCounted
+{
+public:
+	/// Caller acquires a Refcount on construction
+	HttpReplyQueue();
+
+protected:
+	virtual ~HttpReplyQueue();							// Use release()
+
+private:
+	HttpReplyQueue(const HttpReplyQueue &);				// Not defined
+	void operator=(const HttpReplyQueue &);				// Not defined
+
+public:
+	typedef std::vector<HttpOperation *> OpContainer;
+
+	/// Insert an object at the back of the reply queue.
+	///
+	/// Library also takes possession of one reference count to pass
+	/// through the queue.
+	///
+	/// Threading:  callable by any thread.
+	void addOp(HttpOperation * op);
+
+	/// Fetch an operation from the head of the queue.  Returns
+	/// NULL if none exists.
+	///
+	/// Caller acquires reference count on returned operation.
+	///
+	/// Threading:  callable by any thread.
+	HttpOperation * fetchOp();
+
+	/// Caller acquires reference count on each returned operation
+	///
+	/// Threading:  callable by any thread.
+	void fetchAll(OpContainer & ops);
+	
+protected:
+	OpContainer							mQueue;
+	LLCoreInt::HttpMutex				mQueueMutex;
+	LLCoreInt::HttpConditionVariable	mQueueCV;
+	
+}; // end class HttpReplyQueue
+
+}  // end namespace LLCore
+
+
+#endif	// _LLCORE_HTTP_REPLY_QUEUE_H_
diff --git a/indra/llcorehttp/_httprequestqueue.cpp b/indra/llcorehttp/_httprequestqueue.cpp
new file mode 100644
index 0000000000..c16966d078
--- /dev/null
+++ b/indra/llcorehttp/_httprequestqueue.cpp
@@ -0,0 +1,161 @@
+/**
+ * @file _httprequestqueue.cpp
+ * @brief 
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httprequestqueue.h"
+
+#include "_httpoperation.h"
+#include "_mutex.h"
+
+
+using namespace LLCoreInt;
+
+namespace LLCore
+{
+
+HttpRequestQueue * HttpRequestQueue::sInstance(NULL);
+
+
+HttpRequestQueue::HttpRequestQueue()
+	: RefCounted(true),
+	  mQueueStopped(false)
+{
+}
+
+
+HttpRequestQueue::~HttpRequestQueue()
+{
+	while (! mQueue.empty())
+	{
+		HttpOperation * op = mQueue.back();
+		mQueue.pop_back();
+		op->release();
+	}
+}
+
+
+void HttpRequestQueue::init()
+{
+	llassert_always(! sInstance);
+	sInstance = new HttpRequestQueue();
+}
+
+
+void HttpRequestQueue::term()
+{
+	if (sInstance)
+	{
+		sInstance->release();
+		sInstance = NULL;
+	}
+}
+
+
+HttpStatus HttpRequestQueue::addOp(HttpOperation * op)
+{
+	bool wake(false);
+	{
+		HttpScopedLock lock(mQueueMutex);
+
+		if (mQueueStopped)
+		{
+			// Return op and error to caller
+			return HttpStatus(HttpStatus::LLCORE, HE_SHUTTING_DOWN);
+		}
+		wake = mQueue.empty();
+		mQueue.push_back(op);
+	}
+	if (wake)
+	{
+		mQueueCV.notify_all();
+	}
+	return HttpStatus();
+}
+
+
+HttpOperation * HttpRequestQueue::fetchOp(bool wait)
+{
+	HttpOperation * result(NULL);
+
+	{
+		HttpScopedLock lock(mQueueMutex);
+
+		while (mQueue.empty())
+		{
+			if (! wait || mQueueStopped)
+				return NULL;
+			mQueueCV.wait(lock);
+		}
+
+		result = mQueue.front();
+		mQueue.erase(mQueue.begin());
+	}
+
+	// Caller also acquires the reference count
+	return result;
+}
+
+
+void HttpRequestQueue::fetchAll(bool wait, OpContainer & ops)
+{
+	// Not valid putting something back on the queue...
+	llassert_always(ops.empty());
+
+	{
+		HttpScopedLock lock(mQueueMutex);
+
+		while (mQueue.empty())
+		{
+			if (! wait || mQueueStopped)
+				return;
+			mQueueCV.wait(lock);
+		}
+
+		mQueue.swap(ops);
+	}
+
+	// Caller also acquires the reference counts on each op.
+	return;
+}
+
+
+void HttpRequestQueue::wakeAll()
+{
+	mQueueCV.notify_all();
+}
+
+
+void HttpRequestQueue::stopQueue()
+{
+	{
+		HttpScopedLock lock(mQueueMutex);
+
+		mQueueStopped = true;
+		wakeAll();
+	}
+}
+
+
+} // end namespace LLCore
diff --git a/indra/llcorehttp/_httprequestqueue.h b/indra/llcorehttp/_httprequestqueue.h
new file mode 100644
index 0000000000..c9c52b7233
--- /dev/null
+++ b/indra/llcorehttp/_httprequestqueue.h
@@ -0,0 +1,141 @@
+/**
+ * @file _httprequestqueue.h
+ * @brief Internal declaration for the operation request queue
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_REQUEST_QUEUE_H_
+#define	_LLCORE_HTTP_REQUEST_QUEUE_H_
+
+
+#include <vector>
+
+#include "httpcommon.h"
+#include "_refcounted.h"
+#include "_mutex.h"
+
+
+namespace LLCore
+{
+
+
+class HttpOperation;
+
+
+/// Thread-safe queue of HttpOperation objects.  Just
+/// a simple queue that handles the transfer of operation
+/// requests from all HttpRequest instances into the
+/// singleton HttpService instance.
+
+class HttpRequestQueue : public LLCoreInt::RefCounted
+{
+protected:
+	/// Caller acquires a Refcount on construction
+	HttpRequestQueue();
+
+protected:
+	virtual ~HttpRequestQueue();						// Use release()
+
+private:
+	HttpRequestQueue(const HttpRequestQueue &);			// Not defined
+	void operator=(const HttpRequestQueue &);			// Not defined
+
+public:
+	static void init();
+	static void term();
+	
+	/// Threading:  callable by any thread once inited.
+	inline static HttpRequestQueue * instanceOf()
+		{
+			return sInstance;
+		}
+	
+public:
+	typedef std::vector<HttpOperation *> OpContainer;
+
+	/// Insert an object at the back of the request queue.
+	///
+	/// Caller must provide one refcount to the queue which takes
+	/// possession of the count on success.
+	///
+	/// @return			Standard status.  On failure, caller
+	///					must dispose of the operation with
+	///					an explicit release() call.
+	///
+	/// Threading:  callable by any thread.
+	HttpStatus addOp(HttpOperation * op);
+
+	/// Return the operation on the front of the queue.  If
+	/// the queue is empty and @wait is false, call returns
+	/// immediately and a NULL pointer is returned.  If true,
+	/// caller will sleep until explicitly woken.  Wakeups
+	/// can be spurious and callers must expect NULL pointers
+	/// even if waiting is indicated.
+	///
+	/// Caller acquires reference count any returned operation
+	///
+	/// Threading:  callable by any thread.
+	HttpOperation * fetchOp(bool wait);
+
+	/// Return all queued requests to caller.  The @ops argument
+	/// should be empty when called and will be swap()'d with
+	/// current contents.  Handling of the @wait argument is
+	/// identical to @fetchOp.
+	///
+	/// Caller acquires reference count on each returned operation
+	///
+	/// Threading:  callable by any thread.
+	void fetchAll(bool wait, OpContainer & ops);
+
+	/// Wake any sleeping threads.  Normal queuing operations
+	/// won't require this but it may be necessary for termination
+	/// requests.
+	///
+	/// Threading:  callable by any thread.
+	void wakeAll();
+
+	/// Disallow further request queuing.  Callers to @addOp will
+	/// get a failure status (LLCORE, HE_SHUTTING_DOWN).  Callers
+	/// to @fetchAll or @fetchOp will get requests that are on the
+	/// queue but the calls will no longer wait.  Instead they'll
+	/// return immediately.  Also wakes up all sleepers to send
+	/// them on their way.
+	///
+	/// Threading:  callable by any thread.
+	void stopQueue();
+	
+protected:
+	static HttpRequestQueue *			sInstance;
+	
+protected:
+	OpContainer							mQueue;
+	LLCoreInt::HttpMutex				mQueueMutex;
+	LLCoreInt::HttpConditionVariable	mQueueCV;
+	bool								mQueueStopped;
+	
+}; // end class HttpRequestQueue
+
+}  // end namespace LLCore
+
+
+#endif	// _LLCORE_HTTP_REQUEST_QUEUE_H_
diff --git a/indra/llcorehttp/_httpretryqueue.h b/indra/llcorehttp/_httpretryqueue.h
new file mode 100644
index 0000000000..745adec09d
--- /dev/null
+++ b/indra/llcorehttp/_httpretryqueue.h
@@ -0,0 +1,94 @@
+/**
+ * @file _httpretryqueue.h
+ * @brief Internal declaration for the operation retry queue
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_RETRY_QUEUE_H_
+#define	_LLCORE_HTTP_RETRY_QUEUE_H_
+
+
+#include <queue>
+
+#include "_httpoprequest.h"
+
+
+namespace LLCore
+{
+
+/// HttpRetryQueue provides a simple priority queue for HttpOpRequest objects.
+///
+/// This uses the priority_queue adaptor class to provide the queue
+/// as well as the ordering scheme while allowing us access to the
+/// raw container if we follow a few simple rules.  One of the more
+/// important of those rules is that any iterator becomes invalid
+/// on element erasure.  So pay attention.
+///
+/// Threading:  not thread-safe.  Expected to be used entirely by
+/// a single thread, typically a worker thread of some sort.
+
+struct HttpOpRetryCompare
+{
+	bool operator()(const HttpOpRequest * lhs, const HttpOpRequest * rhs)
+		{
+			return lhs->mPolicyRetryAt < rhs->mPolicyRetryAt;
+		}
+};
+
+	
+typedef std::priority_queue<HttpOpRequest *,
+							std::deque<HttpOpRequest *>,
+							LLCore::HttpOpRetryCompare> HttpRetryQueueBase;
+
+class HttpRetryQueue : public HttpRetryQueueBase
+{
+public:
+	HttpRetryQueue()
+		: HttpRetryQueueBase()
+		{}
+	
+	~HttpRetryQueue()
+		{}
+	
+protected:
+	HttpRetryQueue(const HttpRetryQueue &);		// Not defined
+	void operator=(const HttpRetryQueue &);		// Not defined
+
+public:
+	const container_type & get_container() const
+		{
+			return c;
+		}
+
+	container_type & get_container()
+		{
+			return c;
+		}
+
+}; // end class HttpRetryQueue
+
+
+}  // end namespace LLCore
+
+
+#endif	// _LLCORE_HTTP_RETRY_QUEUE_H_
diff --git a/indra/llcorehttp/_httpservice.cpp b/indra/llcorehttp/_httpservice.cpp
new file mode 100644
index 0000000000..0825888d0f
--- /dev/null
+++ b/indra/llcorehttp/_httpservice.cpp
@@ -0,0 +1,348 @@
+/**
+ * @file _httpservice.cpp
+ * @brief Internal definitions of the Http service thread
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_httpservice.h"
+
+#include <boost/bind.hpp>
+#include <boost/function.hpp>
+
+#include "_httpoperation.h"
+#include "_httprequestqueue.h"
+#include "_httppolicy.h"
+#include "_httplibcurl.h"
+#include "_thread.h"
+#include "_httpinternal.h"
+
+#include "lltimer.h"
+#include "llthread.h"
+
+
+namespace LLCore
+{
+
+HttpService * HttpService::sInstance(NULL);
+volatile HttpService::EState HttpService::sState(NOT_INITIALIZED);
+
+HttpService::HttpService()
+	: mRequestQueue(NULL),
+	  mExitRequested(0U),
+	  mThread(NULL),
+	  mPolicy(NULL),
+	  mTransport(NULL)
+{
+	// Create the default policy class
+	HttpPolicyClass pol_class;
+	pol_class.set(HttpRequest::CP_CONNECTION_LIMIT, HTTP_CONNECTION_LIMIT_DEFAULT);
+	pol_class.set(HttpRequest::CP_PER_HOST_CONNECTION_LIMIT, HTTP_CONNECTION_LIMIT_DEFAULT);
+	pol_class.set(HttpRequest::CP_ENABLE_PIPELINING, 0L);
+	mPolicyClasses.push_back(pol_class);
+}
+
+
+HttpService::~HttpService()
+{
+	mExitRequested = 1U;
+	if (RUNNING == sState)
+	{
+		// Trying to kill the service object with a running thread
+		// is a bit tricky.
+		if (mRequestQueue)
+		{
+			mRequestQueue->stopQueue();
+		}
+		
+		if (mThread)
+		{
+			if (! mThread->timedJoin(250))
+			{
+				// Failed to join, expect problems ahead so do a hard termination.
+				mThread->cancel();
+
+				LL_WARNS("CoreHttp") << "Destroying HttpService with running thread.  Expect problems."
+									 << LL_ENDL;
+			}
+		}
+	}
+	
+	if (mRequestQueue)
+	{
+		mRequestQueue->release();
+		mRequestQueue = NULL;
+	}
+
+	delete mTransport;
+	mTransport = NULL;
+	
+	delete mPolicy;
+	mPolicy = NULL;
+
+	if (mThread)
+	{
+		mThread->release();
+		mThread = NULL;
+	}
+}
+	
+
+void HttpService::init(HttpRequestQueue * queue)
+{
+	llassert_always(! sInstance);
+	llassert_always(NOT_INITIALIZED == sState);
+	sInstance = new HttpService();
+
+	queue->addRef();
+	sInstance->mRequestQueue = queue;
+	sInstance->mPolicy = new HttpPolicy(sInstance);
+	sInstance->mTransport = new HttpLibcurl(sInstance);
+	sState = INITIALIZED;
+}
+
+
+void HttpService::term()
+{
+	if (sInstance)
+	{
+		if (RUNNING == sState && sInstance->mThread)
+		{
+			// Unclean termination.  Thread appears to be running.  We'll
+			// try to give the worker thread a chance to cancel using the
+			// exit flag...
+			sInstance->mExitRequested = 1U;
+			sInstance->mRequestQueue->stopQueue();
+			
+			// And a little sleep
+			for (int i(0); i < 10 && RUNNING == sState; ++i)
+			{
+				ms_sleep(100);
+			}
+		}
+
+		delete sInstance;
+		sInstance = NULL;
+	}
+	sState = NOT_INITIALIZED;
+}
+
+
+HttpRequest::policy_t HttpService::createPolicyClass()
+{
+	const HttpRequest::policy_t policy_class(mPolicyClasses.size());
+	if (policy_class >= HTTP_POLICY_CLASS_LIMIT)
+	{
+		return 0;
+	}
+	mPolicyClasses.push_back(HttpPolicyClass());
+	return policy_class;
+}
+
+
+bool HttpService::isStopped()
+{
+	// What is really wanted here is something like:
+	//
+	//     HttpService * service = instanceOf();
+	//     return STOPPED == sState && (! service || ! service->mThread || ! service->mThread->joinable());
+	//
+	// But boost::thread is not giving me a consistent story on joinability
+	// of a thread after it returns.  Debug and non-debug builds are showing
+	// different behavior on Linux/Etch so we do a weaker test that may
+	// not be globally correct (i.e. thread *is* stopping, may not have
+	// stopped but will very soon):
+	
+	return STOPPED == sState;
+}
+
+
+/// Threading:  callable by consumer thread *once*.
+void HttpService::startThread()
+{
+	llassert_always(! mThread || STOPPED == sState);
+	llassert_always(INITIALIZED == sState || STOPPED == sState);
+
+	if (mThread)
+	{
+		mThread->release();
+	}
+
+	// Push current policy definitions, enable policy & transport components
+	mPolicy->start(mPolicyGlobal, mPolicyClasses);
+	mTransport->start(mPolicyClasses.size());
+
+	mThread = new LLCoreInt::HttpThread(boost::bind(&HttpService::threadRun, this, _1));
+	sState = RUNNING;
+}
+
+
+/// Threading:  callable by worker thread.
+void HttpService::stopRequested()
+{
+	mExitRequested = 1U;
+}
+
+
+/// Threading:  callable by worker thread.
+bool HttpService::changePriority(HttpHandle handle, HttpRequest::priority_t priority)
+{
+	bool found(false);
+
+	// Skip the request queue as we currently don't leave earlier
+	// requests sitting there.  Start with the ready queue...
+	found = mPolicy->changePriority(handle, priority);
+
+	// If not there, we could try the transport/active queue but priority
+	// doesn't really have much effect there so we don't waste cycles.
+	
+	return found;
+}
+
+
+/// Try to find the given request handle on any of the request
+/// queues and cancel the operation.
+///
+/// @return			True if the request was canceled.
+///
+/// Threading:  callable by worker thread.
+bool HttpService::cancel(HttpHandle handle)
+{
+	bool canceled(false);
+
+	// Request can't be on request queue so skip that.
+
+	// Check the policy component's queues first
+	canceled = mPolicy->cancel(handle);
+
+	if (! canceled)
+	{
+		// If that didn't work, check transport's.
+		canceled = mTransport->cancel(handle);
+	}
+	
+	return canceled;
+}
+
+	
+/// Threading:  callable by worker thread.
+void HttpService::shutdown()
+{
+	// Disallow future enqueue of requests
+	mRequestQueue->stopQueue();
+
+	// Cancel requests already on the request queue
+	HttpRequestQueue::OpContainer ops;
+	mRequestQueue->fetchAll(false, ops);
+	while (! ops.empty())
+	{
+		HttpOperation * op(ops.front());
+		ops.erase(ops.begin());
+
+		op->cancel();
+		op->release();
+	}
+
+	// Shutdown transport canceling requests, freeing resources
+	mTransport->shutdown();
+
+	// And now policy
+	mPolicy->shutdown();
+}
+
+
+// Working thread loop-forever method.  Gives time to
+// each of the request queue, policy layer and transport
+// layer pieces and then either sleeps for a small time
+// or waits for a request to come in.  Repeats until
+// requested to stop.
+void HttpService::threadRun(LLCoreInt::HttpThread * thread)
+{
+	boost::this_thread::disable_interruption di;
+
+	LLThread::registerThreadID();
+	
+	ELoopSpeed loop(REQUEST_SLEEP);
+	while (! mExitRequested)
+	{
+		loop = processRequestQueue(loop);
+
+		// Process ready queue issuing new requests as needed
+		ELoopSpeed new_loop = mPolicy->processReadyQueue();
+		loop = (std::min)(loop, new_loop);
+		
+		// Give libcurl some cycles
+		new_loop = mTransport->processTransport();
+		loop = (std::min)(loop, new_loop);
+		
+		// Determine whether to spin, sleep briefly or sleep for next request
+		if (REQUEST_SLEEP != loop)
+		{
+			ms_sleep(HTTP_SERVICE_LOOP_SLEEP_NORMAL_MS);
+		}
+	}
+
+	shutdown();
+	sState = STOPPED;
+}
+
+
+HttpService::ELoopSpeed HttpService::processRequestQueue(ELoopSpeed loop)
+{
+	HttpRequestQueue::OpContainer ops;
+	const bool wait_for_req(REQUEST_SLEEP == loop);
+	
+	mRequestQueue->fetchAll(wait_for_req, ops);
+	while (! ops.empty())
+	{
+		HttpOperation * op(ops.front());
+		ops.erase(ops.begin());
+
+		// Process operation
+		if (! mExitRequested)
+		{
+			// Setup for subsequent tracing
+			long tracing(HTTP_TRACE_OFF);
+			mPolicy->getGlobalOptions().get(HttpRequest::GP_TRACE, &tracing);
+			op->mTracing = (std::max)(op->mTracing, int(tracing));
+
+			if (op->mTracing > HTTP_TRACE_OFF)
+			{
+				LL_INFOS("CoreHttp") << "TRACE, FromRequestQueue, Handle:  "
+									 << static_cast<HttpHandle>(op)
+									 << LL_ENDL;
+			}
+
+			// Stage
+			op->stageFromRequest(this);
+		}
+				
+		// Done with operation
+		op->release();
+	}
+
+	// Queue emptied, allow polling loop to sleep
+	return REQUEST_SLEEP;
+}
+
+
+}  // end namespace LLCore
diff --git a/indra/llcorehttp/_httpservice.h b/indra/llcorehttp/_httpservice.h
new file mode 100644
index 0000000000..ffe0349d4d
--- /dev/null
+++ b/indra/llcorehttp/_httpservice.h
@@ -0,0 +1,224 @@
+/**
+ * @file _httpservice.h
+ * @brief Declarations for internal class providing HTTP service.
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_SERVICE_H_
+#define	_LLCORE_HTTP_SERVICE_H_
+
+
+#include <vector>
+
+#include "linden_common.h"
+#include "llapr.h"
+#include "httpcommon.h"
+#include "httprequest.h"
+#include "_httppolicyglobal.h"
+#include "_httppolicyclass.h"
+
+
+namespace LLCoreInt
+{
+
+class HttpThread;
+
+}
+
+
+namespace LLCore
+{
+
+
+class HttpRequestQueue;
+class HttpPolicy;
+class HttpLibcurl;
+
+
+/// The HttpService class does the work behind the request queue.  It
+/// oversees the HTTP workflow carrying out a number of tasks:
+/// - Pulling requests from the global request queue
+/// - Executing 'immediate' requests directly
+/// - Prioritizing and re-queuing on internal queues the slower requests
+/// - Providing cpu cycles to the libcurl plumbing
+/// - Overseeing retry operations
+///
+/// Note that the service object doesn't have a pointer to any
+/// reply queue.  These are kept by HttpRequest and HttpOperation
+/// only.
+///
+/// Service, Policy and Transport
+///
+/// HttpService could have been a monolithic class combining a request
+/// queue servicer, request policy manager and network transport.
+/// Instead, to prevent monolithic growth and allow for easier
+/// replacement, it was developed as three separate classes:  HttpService,
+/// HttpPolicy and HttpLibcurl (transport).  These always exist in a
+/// 1:1:1 relationship with HttpService managing instances of the other
+/// two.  So, these classes do not use reference counting to refer
+/// to one another, their lifecycles are always managed together.
+
+class HttpService
+{
+protected:
+	HttpService();
+	virtual ~HttpService();
+
+private:
+	HttpService(const HttpService &);			// Not defined
+	void operator=(const HttpService &);		// Not defined
+
+public:
+	enum EState
+	{
+		NOT_INITIALIZED = -1,
+		INITIALIZED,			///< init() has been called
+		RUNNING,				///< thread created and running
+		STOPPED					///< thread has committed to exiting
+	};
+
+	// Ordered enumeration of idling strategies available to
+	// threadRun's loop.  Ordered so that std::min on values
+	// produces the most conservative result of multiple
+	// requests.
+	enum ELoopSpeed
+	{
+		NORMAL,					///< continuous polling of request, ready, active queues
+		REQUEST_SLEEP			///< can sleep indefinitely waiting for request queue write
+	};
+		
+	static void init(HttpRequestQueue *);
+	static void term();
+
+	/// Threading:  callable by any thread once inited.
+	inline static HttpService * instanceOf()
+		{
+			return sInstance;
+		}
+
+	/// Return the state of the worker thread.  Note that the
+	/// transition from RUNNING to STOPPED is performed by the
+	/// worker thread itself.  This has two weaknesses:
+	/// - race where the thread hasn't really stopped but will
+	/// - data ordering between threads where a non-worker thread
+	///   may see a stale RUNNING status.
+	///
+	/// This transition is generally of interest only to unit tests
+	/// and these weaknesses shouldn't be any real burden.
+	///
+	/// Threading:  callable by any thread with above exceptions.
+	static EState getState()
+		{
+			return sState;
+		}
+
+	/// Threading:  callable by any thread but uses @see getState() and
+	/// acquires its weaknesses.
+	static bool isStopped();
+
+	/// Threading:  callable by consumer thread *once*.
+	void startThread();
+
+	/// Threading:  callable by worker thread.
+	void stopRequested();
+
+	/// Threading:  callable by worker thread.
+	void shutdown();
+
+	/// Try to find the given request handle on any of the request
+	/// queues and reset the priority (and queue position) of the
+	/// request if found.
+	///
+	/// @return			True if the request was found somewhere.
+	///
+	/// Threading:  callable by worker thread.
+	bool changePriority(HttpHandle handle, HttpRequest::priority_t priority);
+	
+	/// Try to find the given request handle on any of the request
+	/// queues and cancel the operation.
+	///
+	/// @return			True if the request was found and canceled.
+	///
+	/// Threading:  callable by worker thread.
+	bool cancel(HttpHandle handle);
+	
+	/// Threading:  callable by worker thread.
+	HttpPolicy & getPolicy()
+		{
+			return *mPolicy;
+		}
+
+	/// Threading:  callable by worker thread.
+	HttpLibcurl & getTransport()
+		{
+			return *mTransport;
+		}
+
+	/// Threading:  callable by worker thread.
+	HttpRequestQueue & getRequestQueue()
+		{
+			return *mRequestQueue;
+		}
+
+	/// Threading:  callable by consumer thread.
+	HttpPolicyGlobal & getGlobalOptions()
+		{
+			return mPolicyGlobal;
+		}
+
+	/// Threading:  callable by consumer thread.
+	HttpRequest::policy_t createPolicyClass();
+	
+	/// Threading:  callable by consumer thread.
+	HttpPolicyClass & getClassOptions(HttpRequest::policy_t policy_class)
+		{
+			llassert(policy_class >= 0 && policy_class < mPolicyClasses.size());
+			return mPolicyClasses[policy_class];
+		}
+	
+protected:
+	void threadRun(LLCoreInt::HttpThread * thread);
+	
+	ELoopSpeed processRequestQueue(ELoopSpeed loop);
+	
+protected:
+	static HttpService *				sInstance;
+	
+	// === shared data ===
+	static volatile EState				sState;
+	HttpRequestQueue *					mRequestQueue;	// Refcounted
+	LLAtomicU32							mExitRequested;
+	LLCoreInt::HttpThread *				mThread;
+	
+	// === consumer-thread-only data ===
+	HttpPolicyGlobal					mPolicyGlobal;
+	std::vector<HttpPolicyClass>		mPolicyClasses;
+	
+	// === working-thread-only data ===
+	HttpPolicy *						mPolicy;		// Simple pointer, has ownership
+	HttpLibcurl *						mTransport;		// Simple pointer, has ownership
+};  // end class HttpService
+
+}  // end namespace LLCore
+
+#endif // _LLCORE_HTTP_SERVICE_H_
diff --git a/indra/llcorehttp/_mutex.h b/indra/llcorehttp/_mutex.h
new file mode 100644
index 0000000000..4be4d016d4
--- /dev/null
+++ b/indra/llcorehttp/_mutex.h
@@ -0,0 +1,55 @@
+/** 
+ * @file _mutex.hpp
+ * @brief mutex type abstraction
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLCOREINT_MUTEX_H_
+#define LLCOREINT_MUTEX_H_
+
+
+#include <boost/thread.hpp>
+
+
+namespace LLCoreInt
+{
+
+// MUTEX TYPES
+
+// unique mutex type
+typedef boost::mutex HttpMutex;
+
+// CONDITION VARIABLES
+
+// standard condition variable
+typedef boost::condition_variable HttpConditionVariable;
+
+// LOCKS AND FENCES
+
+// scoped unique lock
+typedef boost::unique_lock<HttpMutex> HttpScopedLock;
+
+}
+
+#endif	// LLCOREINT_MUTEX_H
+
diff --git a/indra/llcorehttp/_refcounted.cpp b/indra/llcorehttp/_refcounted.cpp
new file mode 100644
index 0000000000..e7d0b72741
--- /dev/null
+++ b/indra/llcorehttp/_refcounted.cpp
@@ -0,0 +1,45 @@
+/** 
+ * @file _refcounted.cpp
+ * @brief Atomic, thread-safe ref counting and destruction mixin class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "_refcounted.h"
+
+
+namespace LLCoreInt
+{
+
+#if		! LL_WINDOWS
+
+const S32 RefCounted::NOT_REF_COUNTED;
+
+#endif	// ! LL_WINDOWS
+
+RefCounted::~RefCounted()
+{}
+
+
+} // end namespace LLCoreInt
+
+
diff --git a/indra/llcorehttp/_refcounted.h b/indra/llcorehttp/_refcounted.h
new file mode 100644
index 0000000000..a96c65fb6b
--- /dev/null
+++ b/indra/llcorehttp/_refcounted.h
@@ -0,0 +1,125 @@
+/** 
+ * @file _refcounted.h
+ * @brief Atomic, thread-safe ref counting and destruction mixin class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLCOREINT__REFCOUNTED_H_
+#define LLCOREINT__REFCOUNTED_H_
+
+
+#include "linden_common.h"
+
+#include <boost/thread.hpp>
+
+#include "llapr.h"
+
+
+namespace LLCoreInt
+{
+
+
+class RefCounted
+{
+private:
+	RefCounted();								// Not defined - may not be default constructed
+	void operator=(const RefCounted &);			// Not defined
+	
+public:
+	explicit RefCounted(bool const implicit)
+		: mRefCount(implicit)
+		{}
+
+	// ref-count interface
+	void addRef() const;
+	void release() const;
+	bool isLastRef() const;
+	S32 getRefCount() const;
+	void noRef() const;
+
+	static const S32			NOT_REF_COUNTED = -1;
+	
+protected:
+	virtual ~RefCounted();
+	virtual void destroySelf();
+
+private:
+	mutable LLAtomicS32			mRefCount;
+
+}; // end class RefCounted
+
+
+inline void RefCounted::addRef() const
+{
+	S32 count(mRefCount++);
+	llassert_always(count >= 0);
+}
+
+
+inline void RefCounted::release() const
+{
+	S32 count(mRefCount);
+	llassert_always(count != NOT_REF_COUNTED);
+	llassert_always(count > 0);
+	count = mRefCount--;
+
+	// clean ourselves up if that was the last reference
+	if (0 == count)
+	{
+		const_cast<RefCounted *>(this)->destroySelf();
+	}
+}
+
+
+inline bool RefCounted::isLastRef() const
+{
+	const S32 count(mRefCount);
+	llassert_always(count != NOT_REF_COUNTED);
+	llassert_always(count >= 1);
+	return (1 == count);
+}
+
+
+inline S32 RefCounted::getRefCount() const
+{
+	const S32 result(mRefCount);
+	return result;
+}
+
+
+inline void RefCounted::noRef() const
+{
+	llassert_always(mRefCount <= 1);
+	mRefCount = NOT_REF_COUNTED;
+}
+
+
+inline void RefCounted::destroySelf()
+{
+	delete this;
+}
+
+} // end namespace LLCoreInt
+
+#endif	// LLCOREINT__REFCOUNTED_H_
+
diff --git a/indra/llcorehttp/_thread.h b/indra/llcorehttp/_thread.h
new file mode 100644
index 0000000000..e058d660e5
--- /dev/null
+++ b/indra/llcorehttp/_thread.h
@@ -0,0 +1,123 @@
+/** 
+ * @file _thread.h
+ * @brief thread type abstraction
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLCOREINT_THREAD_H_
+#define LLCOREINT_THREAD_H_
+
+#include "linden_common.h"
+
+#include <boost/thread.hpp>
+#include <boost/function.hpp>
+#include <boost/date_time/posix_time/posix_time_types.hpp>
+
+#include "_refcounted.h"
+
+namespace LLCoreInt
+{
+
+class HttpThread : public RefCounted
+{
+private:
+	HttpThread();							// Not defined
+	void operator=(const HttpThread &);		// Not defined
+
+	void at_exit()
+		{
+			// the thread function has exited so we need to release our reference
+			// to ourself so that we will be automagically cleaned up.
+			release();
+		}
+
+	void run()
+		{ // THREAD CONTEXT
+
+			// Take out additional reference for the at_exit handler
+			addRef();
+			boost::this_thread::at_thread_exit(boost::bind(&HttpThread::at_exit, this));
+
+			// run the thread function
+			mThreadFunc(this);
+
+		} // THREAD CONTEXT
+
+protected:
+	virtual ~HttpThread()
+		{
+			delete mThread;
+		}
+
+public:
+	/// Constructs a thread object for concurrent execution but does
+	/// not start running.  Caller receives on refcount on the thread
+	/// instance.  If the thread is started, another will be taken
+	/// out for the exit handler.
+	explicit HttpThread(boost::function<void (HttpThread *)> threadFunc)
+		: RefCounted(true), // implicit reference
+		  mThreadFunc(threadFunc)
+		{
+			// this creates a boost thread that will call HttpThread::run on this instance
+			// and pass it the threadfunc callable...
+			boost::function<void()> f = boost::bind(&HttpThread::run, this);
+
+			mThread = new boost::thread(f);
+		}
+
+	inline void join()
+		{
+			mThread->join();
+		}
+
+	inline bool timedJoin(S32 millis)
+		{
+			return mThread->timed_join(boost::posix_time::milliseconds(millis));
+		}
+
+	inline bool joinable() const
+		{
+			return mThread->joinable();
+		}
+
+	// A very hostile method to force a thread to quit
+	inline void cancel()
+		{
+			boost::thread::native_handle_type thread(mThread->native_handle());
+#if		LL_WINDOWS
+			TerminateThread(thread, 0);
+#else
+			pthread_cancel(thread);
+#endif
+		}
+	
+private:
+	boost::function<void(HttpThread *)> mThreadFunc;
+	boost::thread * mThread;
+}; // end class HttpThread
+
+} // end namespace LLCoreInt
+
+#endif // LLCOREINT_THREAD_H_
+
+
diff --git a/indra/llcorehttp/bufferarray.cpp b/indra/llcorehttp/bufferarray.cpp
new file mode 100644
index 0000000000..8eaaeed710
--- /dev/null
+++ b/indra/llcorehttp/bufferarray.cpp
@@ -0,0 +1,352 @@
+/**
+ * @file bufferarray.cpp
+ * @brief Implements the BufferArray scatter/gather buffer
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "bufferarray.h"
+
+
+// BufferArray is a list of chunks, each a BufferArray::Block, of contiguous
+// data presented as a single array.  Chunks are at least BufferArray::BLOCK_ALLOC_SIZE
+// in length and can be larger.  Any chunk may be partially filled or even
+// empty.
+//
+// The BufferArray itself is sharable as a RefCounted entity.  As shared
+// reads don't work with the concept of a current position/seek value,
+// none is kept with the object.  Instead, the read and write operations
+// all take position arguments.  Single write/shared read isn't supported
+// directly and any such attempts have to be serialized outside of this
+// implementation.
+
+namespace LLCore
+{
+
+
+// ==================================
+// BufferArray::Block Declaration
+// ==================================
+
+class BufferArray::Block
+{
+public:
+	~Block();
+
+	void operator delete(void *);
+	void operator delete(void *, size_t len);
+
+protected:
+	Block(size_t len);
+
+	Block(const Block &);						// Not defined
+	void operator=(const Block &);				// Not defined
+
+	// Allocate the block with the additional space for the
+	// buffered data at the end of the object.
+	void * operator new(size_t len, size_t addl_len);
+	
+public:
+	// Only public entry to get a block.
+	static Block * alloc(size_t len);
+
+public:
+	size_t mUsed;
+	size_t mAlloced;
+
+	// *NOTE:  Must be last member of the object.  We'll
+	// overallocate as requested via operator new and index
+	// into the array at will.
+	char mData[1];		
+};
+
+
+// ==================================
+// BufferArray Definitions
+// ==================================
+
+
+#if	! LL_WINDOWS
+const size_t BufferArray::BLOCK_ALLOC_SIZE;
+#endif	// ! LL_WINDOWS
+
+BufferArray::BufferArray()
+	: LLCoreInt::RefCounted(true),
+	  mLen(0)
+{}
+
+
+BufferArray::~BufferArray()
+{
+	for (container_t::iterator it(mBlocks.begin());
+		 it != mBlocks.end();
+		 ++it)
+	{
+		delete *it;
+		*it = NULL;
+	}
+	mBlocks.clear();
+}
+
+
+size_t BufferArray::append(const void * src, size_t len)
+{
+	const size_t ret(len);
+	const char * c_src(static_cast<const char *>(src));
+					  
+	// First, try to copy into the last block
+	if (len && ! mBlocks.empty())
+	{
+		Block & last(*mBlocks.back());
+		if (last.mUsed < last.mAlloced)
+		{
+			// Some will fit...
+			const size_t copy_len((std::min)(len, (last.mAlloced - last.mUsed)));
+
+			memcpy(&last.mData[last.mUsed], c_src, copy_len);
+			last.mUsed += copy_len;
+			llassert_always(last.mUsed <= last.mAlloced);
+			mLen += copy_len;
+			c_src += copy_len;
+			len -= copy_len;
+		}
+	}
+
+	// Then get new blocks as needed
+	while (len)
+	{
+		const size_t copy_len((std::min)(len, BLOCK_ALLOC_SIZE));
+		
+		if (mBlocks.size() >= mBlocks.capacity())
+		{
+			mBlocks.reserve(mBlocks.size() + 5);
+		}
+		Block * block = Block::alloc(BLOCK_ALLOC_SIZE);
+		memcpy(block->mData, c_src, copy_len);
+		block->mUsed = copy_len;
+		llassert_always(block->mUsed <= block->mAlloced);
+		mBlocks.push_back(block);
+		mLen += copy_len;
+		c_src += copy_len;
+		len -= copy_len;
+	}
+	return ret;
+}
+
+
+void * BufferArray::appendBufferAlloc(size_t len)
+{
+	// If someone asks for zero-length, we give them a valid pointer.
+	if (mBlocks.size() >= mBlocks.capacity())
+	{
+		mBlocks.reserve(mBlocks.size() + 5);
+	}
+	Block * block = Block::alloc((std::max)(BLOCK_ALLOC_SIZE, len));
+	block->mUsed = len;
+	mBlocks.push_back(block);
+	mLen += len;
+	return block->mData;
+}
+
+
+size_t BufferArray::read(size_t pos, void * dst, size_t len)
+{
+	char * c_dst(static_cast<char *>(dst));
+	
+	if (pos >= mLen)
+		return 0;
+	size_t len_limit(mLen - pos);
+	len = (std::min)(len, len_limit);
+	if (0 == len)
+		return 0;
+	
+	size_t result(0), offset(0);
+	const int block_limit(mBlocks.size());
+	int block_start(findBlock(pos, &offset));
+	if (block_start < 0)
+		return 0;
+
+	do
+	{
+		Block & block(*mBlocks[block_start]);
+		size_t block_limit(block.mUsed - offset);
+		size_t block_len((std::min)(block_limit, len));
+		
+		memcpy(c_dst, &block.mData[offset], block_len);
+		result += block_len;
+		len -= block_len;
+		c_dst += block_len;
+		offset = 0;
+		++block_start;
+	}
+	while (len && block_start < block_limit);
+
+	return result;
+}
+
+
+size_t BufferArray::write(size_t pos, const void * src, size_t len)
+{
+	const char * c_src(static_cast<const char *>(src));
+	
+	if (pos > mLen || 0 == len)
+		return 0;
+	
+	size_t result(0), offset(0);
+	const int block_limit(mBlocks.size());
+	int block_start(findBlock(pos, &offset));
+
+	if (block_start >= 0)
+	{
+		// Some or all of the write will be on top of
+		// existing data.
+		do
+		{
+			Block & block(*mBlocks[block_start]);
+			size_t block_limit(block.mUsed - offset);
+			size_t block_len((std::min)(block_limit, len));
+		
+			memcpy(&block.mData[offset], c_src, block_len);
+			result += block_len;
+			c_src += block_len;
+			len -= block_len;
+			offset = 0;
+			++block_start;
+		}
+		while (len && block_start < block_limit);
+	}
+
+	// Something left, see if it will fit in the free
+	// space of the last block.
+	if (len && ! mBlocks.empty())
+	{
+		Block & last(*mBlocks.back());
+		if (last.mUsed < last.mAlloced)
+		{
+			// Some will fit...
+			const size_t copy_len((std::min)(len, (last.mAlloced - last.mUsed)));
+
+			memcpy(&last.mData[last.mUsed], c_src, copy_len);
+			last.mUsed += copy_len;
+			result += copy_len;
+			llassert_always(last.mUsed <= last.mAlloced);
+			mLen += copy_len;
+			c_src += copy_len;
+			len -= copy_len;
+		}
+	}
+	
+	if (len)
+	{
+		// Some or all of the remaining write data will
+		// be an append.
+		result += append(c_src, len);
+	}
+
+	return result;
+}
+		
+
+int BufferArray::findBlock(size_t pos, size_t * ret_offset)
+{
+	*ret_offset = 0;
+	if (pos >= mLen)
+		return -1;		// Doesn't exist
+
+	const int block_limit(mBlocks.size());
+	for (int i(0); i < block_limit; ++i)
+	{
+		if (pos < mBlocks[i]->mUsed)
+		{
+			*ret_offset = pos;
+			return i;
+		}
+		pos -= mBlocks[i]->mUsed;
+	}
+
+	// Shouldn't get here but...
+	return -1;
+}
+
+
+bool BufferArray::getBlockStartEnd(int block, const char ** start, const char ** end)
+{
+	if (block < 0 || block >= mBlocks.size())
+	{
+		return false;
+	}
+
+	const Block & b(*mBlocks[block]);
+	*start = &b.mData[0];
+	*end = &b.mData[b.mUsed];
+	return true;
+}
+
+
+// ==================================
+// BufferArray::Block Definitions
+// ==================================
+
+
+BufferArray::Block::Block(size_t len)
+	: mUsed(0),
+	  mAlloced(len)
+{
+	memset(mData, 0, len);
+}
+			
+
+BufferArray::Block::~Block()
+{
+	mUsed = 0;
+	mAlloced = 0;
+}
+
+
+void * BufferArray::Block::operator new(size_t len, size_t addl_len)
+{
+	void * mem = new char[len + addl_len + sizeof(void *)];
+	return mem;
+}
+
+
+void BufferArray::Block::operator delete(void * mem)
+{
+	char * cmem = static_cast<char *>(mem);
+	delete [] cmem;
+}
+
+
+void BufferArray::Block::operator delete(void * mem, size_t)
+{
+	operator delete(mem);
+}
+
+
+BufferArray::Block * BufferArray::Block::alloc(size_t len)
+{
+	Block * block = new (len) Block(len);
+	return block;
+}
+	
+
+}  // end namespace LLCore
diff --git a/indra/llcorehttp/bufferarray.h b/indra/llcorehttp/bufferarray.h
new file mode 100644
index 0000000000..1094a435b4
--- /dev/null
+++ b/indra/llcorehttp/bufferarray.h
@@ -0,0 +1,137 @@
+/**
+ * @file bufferarray.h
+ * @brief Public-facing declaration for the BufferArray scatter/gather class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_BUFFER_ARRAY_H_
+#define	_LLCORE_BUFFER_ARRAY_H_
+
+
+#include <cstdlib>
+#include <vector>
+
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+class BufferArrayStreamBuf;
+
+/// A very simple scatter/gather type map for bulk data.  The motivation
+/// for this class is the writedata callback used by libcurl.  Response
+/// bodies are delivered to the caller in a sequence of sequential write
+/// operations and this class captures them without having to reallocate
+/// and move data.
+///
+/// The interface looks a little like a unix file descriptor but only
+/// just.  There is a notion of a current position, starting from 0,
+/// which is used as the position in the data when performing read and
+/// write operations.  The position also moves after various operations:
+/// - seek(...)
+/// - read(...)
+/// - write(...)
+/// - append(...)
+/// - appendBufferAlloc(...)
+/// The object also keeps a total length value which is updated after
+/// write and append operations and beyond which the current position
+/// cannot be set.
+///
+/// Threading:  not thread-safe
+///
+/// Allocation:  Refcounted, heap only.  Caller of the constructor
+/// is given a single refcount.
+///
+class BufferArray : public LLCoreInt::RefCounted
+{
+public:
+	// BufferArrayStreamBuf has intimate knowledge of this
+	// implementation to implement a buffer-free adapter.
+	// Changes here will likely need to be reflected there.
+	friend class BufferArrayStreamBuf;
+	
+	BufferArray();
+
+protected:
+	virtual ~BufferArray();						// Use release()
+
+private:
+	BufferArray(const BufferArray &);			// Not defined
+	void operator=(const BufferArray &);		// Not defined
+
+public:
+	// Internal magic number, may be used by unit tests.
+	static const size_t BLOCK_ALLOC_SIZE = 65540;
+	
+	/// Appends the indicated data to the BufferArray
+	/// modifying current position and total size.  New
+	/// position is one beyond the final byte of the buffer.
+	///
+	/// @return			Count of bytes copied to BufferArray
+	size_t append(const void * src, size_t len);
+
+	/// Similar to @see append(), this call guarantees a
+	/// contiguous block of memory of requested size placed
+	/// at the current end of the BufferArray.  On return,
+	/// the data in the memory is considered valid whether
+	/// the caller writes to it or not.
+	///
+	/// @return			Pointer to contiguous region at end
+	///					of BufferArray of 'len' size.
+	void * appendBufferAlloc(size_t len);
+
+	/// Current count of bytes in BufferArray instance.
+	size_t size() const
+		{
+			return mLen;
+		}
+
+	/// Copies data from the given position in the instance
+	/// to the caller's buffer.  Will return a short count of
+	/// bytes copied if the 'len' extends beyond the data.
+	size_t read(size_t pos, void * dst, size_t len);
+
+	/// Copies data from the caller's buffer to the instance
+	/// at the current position.  May overwrite existing data,
+	/// append data when current position is equal to the
+	/// size of the instance or do a mix of both.
+	size_t write(size_t pos, const void * src, size_t len);
+	
+protected:
+	int findBlock(size_t pos, size_t * ret_offset);
+
+	bool getBlockStartEnd(int block, const char ** start, const char ** end);
+	
+protected:
+	class Block;
+	typedef std::vector<Block *> container_t;
+
+	container_t			mBlocks;
+	size_t				mLen;
+};  // end class BufferArray
+
+
+}  // end namespace LLCore
+
+#endif	// _LLCORE_BUFFER_ARRAY_H_
diff --git a/indra/llcorehttp/bufferstream.cpp b/indra/llcorehttp/bufferstream.cpp
new file mode 100644
index 0000000000..6553900eef
--- /dev/null
+++ b/indra/llcorehttp/bufferstream.cpp
@@ -0,0 +1,285 @@
+/**
+ * @file bufferstream.cpp
+ * @brief Implements the BufferStream adapter class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "bufferstream.h"
+
+#include "bufferarray.h"
+
+
+namespace LLCore
+{
+
+BufferArrayStreamBuf::BufferArrayStreamBuf(BufferArray * array)
+	: mBufferArray(array),
+	  mReadCurPos(0),
+	  mReadCurBlock(-1),
+	  mReadBegin(NULL),
+	  mReadCur(NULL),
+	  mReadEnd(NULL),
+	  mWriteCurPos(0)
+{
+	if (array)
+	{
+		array->addRef();
+		mWriteCurPos = array->mLen;
+	}
+}
+
+
+BufferArrayStreamBuf::~BufferArrayStreamBuf()
+{
+	if (mBufferArray)
+	{
+		mBufferArray->release();
+		mBufferArray = NULL;
+	}
+}
+
+	
+BufferArrayStreamBuf::int_type BufferArrayStreamBuf::underflow()
+{
+	if (! mBufferArray)
+	{
+		return traits_type::eof();
+	}
+
+	if (mReadCur == mReadEnd)
+	{
+		// Find the next block with actual data or leave
+		// mCurBlock/mCur/mEnd unchanged if we're at the end
+		// of any block chain.
+		const char * new_begin(NULL), * new_end(NULL);
+		int new_cur_block(mReadCurBlock + 1);
+
+		while (mBufferArray->getBlockStartEnd(new_cur_block, &new_begin, &new_end))
+		{
+			if (new_begin != new_end)
+			{
+				break;
+			}
+			++new_cur_block;
+		}
+		if (new_begin == new_end)
+		{
+			return traits_type::eof();
+		}
+
+		mReadCurBlock = new_cur_block;
+		mReadBegin = mReadCur = new_begin;
+		mReadEnd = new_end;
+	}
+
+	return traits_type::to_int_type(*mReadCur);
+}
+
+
+BufferArrayStreamBuf::int_type BufferArrayStreamBuf::uflow()
+{
+	const int_type ret(underflow());
+
+	if (traits_type::eof() != ret)
+	{
+		++mReadCur;
+		++mReadCurPos;
+	}
+	return ret;
+}
+
+
+BufferArrayStreamBuf::int_type BufferArrayStreamBuf::pbackfail(int_type ch)
+{
+	if (! mBufferArray)
+	{
+		return traits_type::eof();
+	}
+
+	if (mReadCur == mReadBegin)
+	{
+		// Find the previous block with actual data or leave
+		// mCurBlock/mBegin/mCur/mEnd unchanged if we're at the
+		// beginning of any block chain.
+		const char * new_begin(NULL), * new_end(NULL);
+		int new_cur_block(mReadCurBlock - 1);
+
+		while (mBufferArray->getBlockStartEnd(new_cur_block, &new_begin, &new_end))
+		{
+			if (new_begin != new_end)
+			{
+				break;
+			}
+			--new_cur_block;
+		}
+		if (new_begin == new_end)
+		{
+			return traits_type::eof();
+		}
+
+		mReadCurBlock = new_cur_block;
+		mReadBegin = new_begin;
+		mReadEnd = mReadCur = new_end;
+	}
+
+	if (traits_type::eof() != ch && mReadCur[-1] != ch)
+	{
+		return traits_type::eof();
+	}
+	--mReadCurPos;
+	return traits_type::to_int_type(*--mReadCur);
+}
+
+
+std::streamsize BufferArrayStreamBuf::showmanyc()
+{
+	if (! mBufferArray)
+	{
+		return -1;
+	}
+	return mBufferArray->mLen - mReadCurPos;
+}
+
+
+BufferArrayStreamBuf::int_type BufferArrayStreamBuf::overflow(int c)
+{
+	if (! mBufferArray || mWriteCurPos > mBufferArray->mLen)
+	{
+		return traits_type::eof();
+	}
+	const size_t wrote(mBufferArray->write(mWriteCurPos, &c, 1));
+	mWriteCurPos += wrote;
+	return wrote ? c : traits_type::eof();
+}
+
+
+std::streamsize BufferArrayStreamBuf::xsputn(const char * src, std::streamsize count)
+{
+	if (! mBufferArray || mWriteCurPos > mBufferArray->mLen)
+	{
+		return 0;
+	}
+	const size_t wrote(mBufferArray->write(mWriteCurPos, src, count));
+	mWriteCurPos += wrote;
+	return wrote;
+}
+
+
+std::streampos BufferArrayStreamBuf::seekoff(std::streamoff off,
+											 std::ios_base::seekdir way,
+											 std::ios_base::openmode which)
+{
+	std::streampos ret(-1);
+
+	if (! mBufferArray)
+	{
+		return ret;
+	}
+	
+	if (std::ios_base::in == which)
+	{
+		size_t pos(0);
+
+		switch (way)
+		{
+		case std::ios_base::beg:
+			pos = off;
+			break;
+			
+		case std::ios_base::cur:
+			pos = mReadCurPos += off;
+			break;
+			
+		case std::ios_base::end:
+			pos = mBufferArray->mLen - off;
+			break;
+
+		default:
+			return ret;
+		}
+
+		if (pos >= mBufferArray->size())
+		{
+			pos = (std::max)(size_t(0), mBufferArray->size() - 1);
+		}
+		size_t ba_offset(0);
+		int block(mBufferArray->findBlock(pos, &ba_offset));
+		if (block < 0)
+			return ret;
+		const char * start(NULL), * end(NULL);
+		if (! mBufferArray->getBlockStartEnd(block, &start, &end))
+			return ret;
+		mReadCurBlock = block;
+		mReadBegin = start;
+		mReadCur = start + ba_offset;
+		mReadEnd = end;
+		ret = mReadCurPos = pos;
+	}
+	else if (std::ios_base::out == which)
+	{
+		size_t pos(0);
+
+		switch (way)
+		{
+		case std::ios_base::beg:
+			pos = off;
+			break;
+			
+		case std::ios_base::cur:
+			pos = mWriteCurPos += off;
+			break;
+			
+		case std::ios_base::end:
+			pos = mBufferArray->mLen - off;
+			break;
+
+		default:
+			return ret;
+		}
+
+		if (pos < 0)
+			return ret;
+		if (pos > mBufferArray->size())
+		{
+			pos = mBufferArray->size();
+		}
+		ret = mWriteCurPos = pos;
+	}
+
+	return ret;
+}
+
+
+BufferArrayStream::BufferArrayStream(BufferArray * ba)
+	: std::iostream(&mStreamBuf),
+	  mStreamBuf(ba)
+{}
+	
+			
+BufferArrayStream::~BufferArrayStream()
+{}
+	
+
+}  // end namespace LLCore
+
+
diff --git a/indra/llcorehttp/bufferstream.h b/indra/llcorehttp/bufferstream.h
new file mode 100644
index 0000000000..9327a798aa
--- /dev/null
+++ b/indra/llcorehttp/bufferstream.h
@@ -0,0 +1,153 @@
+/**
+ * @file bufferstream.h
+ * @brief Public-facing declaration for the BufferStream adapter class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_BUFFER_STREAM_H_
+#define	_LLCORE_BUFFER_STREAM_H_
+
+
+#include <sstream>
+#include <cstdlib>
+
+#include "bufferarray.h"
+
+
+/// @file bufferstream.h
+///
+/// std::streambuf and std::iostream adapters for BufferArray
+/// objects.
+///
+/// BufferArrayStreamBuf inherits std::streambuf and implements
+/// an unbuffered interface for streambuf.  This may or may not
+/// be the most time efficient implementation and it is a little
+/// challenging.
+///
+/// BufferArrayStream inherits std::iostream and will be the
+/// adapter object most callers will be interested in (though
+/// it uses BufferArrayStreamBuf internally).  Instances allow
+/// for the usual streaming operators ('<<', '>>') and serialization
+/// methods.
+///
+/// Example of LLSD serialization to a BufferArray:
+///
+///   BufferArray * ba = new BufferArray;
+///   BufferArrayStream bas(ba);
+///   LLSDSerialize::toXML(llsd, bas);
+///   operationOnBufferArray(ba);
+///   ba->release();
+///   ba = NULL;
+///   // operationOnBufferArray and bas are each holding
+///   // references to the ba instance at this point.
+///
+
+namespace LLCore
+{
+
+
+// =====================================================
+// BufferArrayStreamBuf
+// =====================================================
+
+/// Adapter class to put a std::streambuf interface on a BufferArray
+///
+/// Application developers will rarely be interested in anything
+/// other than the constructor and even that will rarely be used
+/// except indirectly via the @BufferArrayStream class.  The
+/// choice of interfaces implemented yields a bufferless adapter
+/// that doesn't used either the input or output pointer triplets
+/// of the more common buffered implementations.  This may or may
+/// not be faster and that question could stand to be looked at
+/// sometime.
+///
+
+class BufferArrayStreamBuf : public std::streambuf
+{
+public:
+	/// Constructor increments the reference count on the
+	/// BufferArray argument and calls release() on destruction.
+	BufferArrayStreamBuf(BufferArray * array);
+	virtual ~BufferArrayStreamBuf();
+
+private:
+	BufferArrayStreamBuf(const BufferArrayStreamBuf &);	// Not defined
+	void operator=(const BufferArrayStreamBuf &);		// Not defined
+
+public:
+	// Input interfaces from std::streambuf
+	int_type underflow();
+	int_type uflow();
+	int_type pbackfail(int_type ch);
+	std::streamsize showmanyc();
+
+	// Output interfaces from std::streambuf
+	int_type overflow(int c);
+	std::streamsize xsputn(const char * src, std::streamsize count);
+
+	// Common/misc interfaces from std::streambuf
+	std::streampos seekoff(std::streamoff off, std::ios_base::seekdir way, std::ios_base::openmode which);
+	
+protected:
+	BufferArray *		mBufferArray;			// Ref counted
+	size_t				mReadCurPos;
+	int					mReadCurBlock;
+	const char *		mReadBegin;
+	const char *		mReadCur;
+	const char *		mReadEnd;
+	size_t				mWriteCurPos;
+	
+}; // end class BufferArrayStreamBuf
+
+
+// =====================================================
+// BufferArrayStream
+// =====================================================
+
+/// Adapter class that supplies streaming operators to BufferArray
+///
+/// Provides a streaming adapter to an existing BufferArray
+/// instance so that the convenient '<<' and '>>' conversions
+/// can be applied to a BufferArray.  Very convenient for LLSD
+/// serialization and parsing as well.
+
+class BufferArrayStream : public std::iostream
+{
+public:
+	/// Constructor increments the reference count on the
+	/// BufferArray argument and calls release() on destruction.
+	BufferArrayStream(BufferArray * ba);
+	~BufferArrayStream();
+
+protected:
+	BufferArrayStream(const BufferArrayStream &);
+	void operator=(const BufferArrayStream &);
+
+protected:
+	BufferArrayStreamBuf		mStreamBuf;
+}; // end class BufferArrayStream
+
+
+}  // end namespace LLCore
+
+#endif	// _LLCORE_BUFFER_STREAM_H_
diff --git a/indra/llcorehttp/examples/http_texture_load.cpp b/indra/llcorehttp/examples/http_texture_load.cpp
new file mode 100644
index 0000000000..998dc9240b
--- /dev/null
+++ b/indra/llcorehttp/examples/http_texture_load.cpp
@@ -0,0 +1,943 @@
+/**
+ * @file http_texture_load.cpp
+ * @brief Texture download example for core-http library
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include <iostream>
+#include <cstdio>
+#include <cstdlib>
+#include <set>
+#include <map>
+#if !defined(WIN32)
+#include <pthread.h>
+#endif
+
+#include "linden_common.h"
+
+#include "httpcommon.h"
+#include "httprequest.h"
+#include "httphandler.h"
+#include "httpresponse.h"
+#include "httpheaders.h"
+#include "bufferarray.h"
+#include "_mutex.h"
+
+#include <curl/curl.h>
+#include <openssl/crypto.h>
+
+#include "lltimer.h"
+
+
+void init_curl();
+void term_curl();
+unsigned long ssl_thread_id_callback(void);
+void ssl_locking_callback(int mode, int type, const char * file, int line);
+void usage(std::ostream & out);
+
+// Default command line settings
+static int concurrency_limit(40);
+static char url_format[1024] = "http://example.com/some/path?texture_id=%s.texture";
+
+#if defined(WIN32)
+
+#define	strncpy(_a, _b, _c)   strncpy_s(_a, _b, _c)
+#define strtok_r(_a, _b, _c)		strtok_s(_a, _b, _c)
+
+int getopt(int argc, char * const argv[], const char *optstring);
+char *optarg(NULL);
+int optind(1);
+
+#endif
+
+
+// Mostly just a container for the texture IDs and fetch
+// parameters....
+class WorkingSet : public LLCore::HttpHandler
+{
+public:
+	WorkingSet();
+	~WorkingSet();
+
+	bool reload(LLCore::HttpRequest *);
+	
+	virtual void onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response);
+
+	void loadTextureUuids(FILE * in);
+	
+public:
+	struct Spec
+	{
+		std::string		mUuid;
+		int				mOffset;
+		int				mLength;
+	};
+	typedef std::set<LLCore::HttpHandle> handle_set_t;
+	typedef std::vector<Spec> texture_list_t;
+	
+public:
+	bool						mVerbose;
+	bool						mRandomRange;
+	int							mMaxConcurrency;
+	handle_set_t				mHandles;
+	int							mRemaining;
+	int							mLimit;
+	int							mAt;
+	std::string					mUrl;
+	texture_list_t				mTextures;
+	int							mErrorsApi;
+	int							mErrorsHttp;
+	int							mErrorsHttp404;
+	int							mErrorsHttp416;
+	int							mErrorsHttp500;
+	int							mErrorsHttp503;
+	int							mSuccesses;
+	long						mByteCount;
+	LLCore::HttpHeaders *		mHeaders;
+};
+
+
+// Gather process information while we run.  Process
+// size, cpu consumed, wallclock time.
+
+class Metrics
+{
+public:
+	class MetricsImpl;
+	
+public:
+	Metrics();
+	~Metrics();
+
+	void init();
+	void sample();
+	void term();
+
+protected:
+	MetricsImpl *		mImpl;
+
+public:
+	U64					mMaxVSZ;
+	U64					mMinVSZ;
+	U64					mStartWallTime;
+	U64					mEndWallTime;
+	U64					mStartUTime;
+	U64					mEndUTime;
+	U64					mStartSTime;
+	U64					mEndSTime;
+};
+
+
+//
+//
+//
+int main(int argc, char** argv)
+{
+	bool do_random(false);
+	bool do_verbose(false);
+	
+	int option(-1);
+	while (-1 != (option = getopt(argc, argv, "u:c:h?Rv")))
+	{
+		switch (option)
+		{
+		case 'u':
+			strncpy(url_format, optarg, sizeof(url_format));
+			url_format[sizeof(url_format) - 1] = '\0';
+			break;
+
+		case 'c':
+		    {
+				unsigned long value;
+				char * end;
+
+				value = strtoul(optarg, &end, 10);
+				if (value < 1 || value > 100 || *end != '\0')
+				{
+					usage(std::cerr);
+					return 1;
+				}
+				concurrency_limit = value;
+			}
+			break;
+
+		case 'R':
+			do_random = true;
+			break;
+
+		case 'v':
+			do_verbose = true;
+			break;
+			
+		case 'h':
+		case '?':
+			usage(std::cout);
+			return 0;
+		}
+	}
+
+	if ((optind + 1) != argc)
+	{
+		usage(std::cerr);
+		return 1;
+	}
+
+	FILE * uuids(fopen(argv[optind], "r"));
+	if (! uuids)
+	{
+		const char * errstr(strerror(errno));
+		
+		std::cerr << "Couldn't open UUID file '" << argv[optind] << "'.  Reason:  "
+				  << errstr << std::endl;
+		return 1;
+	}
+	
+	// Initialization
+	init_curl();
+	LLCore::HttpRequest::createService();
+	LLCore::HttpRequest::startThread();
+	
+	// Get service point
+	LLCore::HttpRequest * hr = new LLCore::HttpRequest();
+
+	// Get a handler/working set
+	WorkingSet ws;
+
+	// Fill the working set with work
+	ws.mUrl = url_format;
+	ws.loadTextureUuids(uuids);
+	ws.mRandomRange = do_random;
+	ws.mVerbose = do_verbose;
+	ws.mMaxConcurrency = concurrency_limit;
+	
+	if (! ws.mTextures.size())
+	{
+		std::cerr << "No UUIDs found in file '" << argv[optind] << "'." << std::endl;
+		return 1;
+	}
+
+	// Setup metrics
+	Metrics metrics;
+	metrics.init();
+	
+	// Run it
+	int passes(0);
+	while (! ws.reload(hr))
+	{
+		hr->update(5000000);
+		ms_sleep(2);
+		if (0 == (++passes % 200))
+		{
+			metrics.sample();
+		}
+	}
+	metrics.sample();
+	metrics.term();
+
+	// Report
+	std::cout << "HTTP errors: " << ws.mErrorsHttp << "  API errors:  " << ws.mErrorsApi
+			  << "  Successes:  " << ws.mSuccesses << "  Byte count:  " << ws.mByteCount
+			  << std::endl;
+	std::cout << "HTTP 404 errors: " << ws.mErrorsHttp404 << "  HTTP 416 errors: " << ws.mErrorsHttp416
+			  << "  HTTP 500 errors:  " << ws.mErrorsHttp500 << "  HTTP 503 errors: " << ws.mErrorsHttp503 
+			  << std::endl;
+	std::cout << "User CPU: " << (metrics.mEndUTime - metrics.mStartUTime)
+			  << " uS  System CPU: " << (metrics.mEndSTime - metrics.mStartSTime)
+			  << " uS  Wall Time: "  << (metrics.mEndWallTime - metrics.mStartWallTime)
+			  << " uS  Maximum VSZ: " << metrics.mMaxVSZ
+			  << " Bytes  Minimum VSZ: " << metrics.mMinVSZ << " Bytes"
+			  << std::endl;
+
+	// Clean up
+	hr->requestStopThread(NULL);
+	ms_sleep(1000);
+	delete hr;
+	LLCore::HttpRequest::destroyService();
+	term_curl();
+	
+    return 0;
+}
+
+
+void usage(std::ostream & out)
+{
+	out << "\n"
+		"usage:\thttp_texture_load [options]  uuid_file\n"
+		"\n"
+		"This is a standalone program to drive the New Platform HTTP Library.\n"
+		"The program is supplied with a file of texture UUIDs, one per line\n"
+		"These are fetched sequentially using a pool of concurrent connection\n"
+		"until all are fetched.  The default URL format is only useful from\n"
+		"within Linden Lab but this can be overriden with a printf-style\n"
+		"URL formatting string on the command line.\n"
+		"\n"
+		"Options:\n"
+		"\n"
+		" -u <url_format>       printf-style format string for URL generation\n"
+		"                       Default:  " << url_format << "\n"
+		" -R                    Issue GETs with random Range: headers\n"
+		" -c <limit>            Maximum request concurrency.  Range:  [1..100]\n"
+		"                       Default:  " << concurrency_limit << "\n"
+		" -v                    Verbose mode.  Issue some chatter while running\n"
+		" -h                    print this help\n"
+		"\n"
+		<< std::endl;
+}
+
+
+WorkingSet::WorkingSet()
+	: LLCore::HttpHandler(),
+	  mVerbose(false),
+	  mRandomRange(false),
+	  mRemaining(200),
+	  mLimit(200),
+	  mAt(0),
+	  mErrorsApi(0),
+	  mErrorsHttp(0),
+	  mErrorsHttp404(0),
+	  mErrorsHttp416(0),
+	  mErrorsHttp500(0),
+	  mErrorsHttp503(0),
+	  mSuccesses(0),
+	  mByteCount(0L)
+{
+	mTextures.reserve(30000);
+
+	mHeaders = new LLCore::HttpHeaders;
+	mHeaders->mHeaders.push_back("Accept: image/x-j2c");
+}
+
+
+WorkingSet::~WorkingSet()
+{
+	if (mHeaders)
+	{
+		mHeaders->release();
+		mHeaders = NULL;
+	}
+}
+
+
+bool WorkingSet::reload(LLCore::HttpRequest * hr)
+{
+	int to_do((std::min)(mRemaining, mMaxConcurrency - int(mHandles.size())));
+
+	for (int i(0); i < to_do; ++i)
+	{
+		char buffer[1024];
+#if	defined(WIN32)
+		_snprintf_s(buffer, sizeof(buffer), sizeof(buffer) - 1, mUrl.c_str(), mTextures[mAt].mUuid.c_str());
+#else
+		snprintf(buffer, sizeof(buffer), mUrl.c_str(), mTextures[mAt].mUuid.c_str());
+#endif
+		int offset(mRandomRange ? ((unsigned long) rand()) % 1000000UL : mTextures[mAt].mOffset);
+		int length(mRandomRange ? ((unsigned long) rand()) % 1000000UL : mTextures[mAt].mLength);
+
+		LLCore::HttpHandle handle;
+		if (offset || length)
+		{
+			handle = hr->requestGetByteRange(0, 0, buffer, offset, length, NULL, mHeaders, this);
+		}
+		else
+		{
+			handle = hr->requestGet(0, 0, buffer, NULL, mHeaders, this);
+		}
+		if (! handle)
+		{
+			// Fatal.  Couldn't queue up something.
+			std::cerr << "Failed to queue work to HTTP Service.  Reason:  "
+					  << hr->getStatus().toString() << std::endl;
+			exit(1);
+		}
+		else
+		{
+			mHandles.insert(handle);
+		}
+		mAt++;
+		mRemaining--;
+
+		if (mVerbose)
+		{
+			static int count(0);
+			++count;
+			if (0 == (count %5))
+				std::cout << "Queued " << count << std::endl;
+		}
+	}
+
+	// Are we done?
+	return (! mRemaining) && mHandles.empty();
+}
+	
+
+void WorkingSet::onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response)
+{
+	handle_set_t::iterator it(mHandles.find(handle));
+	if (mHandles.end() == it)
+	{
+		// Wha?
+		std::cerr << "Failed to find handle in request list.  Fatal." << std::endl;
+		exit(1);
+	}
+	else
+	{
+		LLCore::HttpStatus status(response->getStatus());
+		if (status)
+		{
+			// More success
+			LLCore::BufferArray * data(response->getBody());
+			mByteCount += data->size();
+			++mSuccesses;
+		}
+		else
+		{
+			// Something in this library or libcurl
+			if (status.isHttpStatus())
+			{
+				static const LLCore::HttpStatus hs404(404);
+				static const LLCore::HttpStatus hs416(416);
+				static const LLCore::HttpStatus hs500(500);
+				static const LLCore::HttpStatus hs503(503);
+				
+				++mErrorsHttp;
+				if (hs404 == status)
+				{
+					++mErrorsHttp404;
+				}
+				else if (hs416 == status)
+				{
+					++mErrorsHttp416;
+				}
+				else if (hs500 == status)
+				{
+					++mErrorsHttp500;
+				}
+				else if (hs503 == status)
+				{
+					++mErrorsHttp503;
+				}
+			}
+			else
+			{
+				++mErrorsApi;
+			}
+		}
+		mHandles.erase(it);
+	}
+
+	if (mVerbose)
+	{
+		static int count(0);
+		++count;
+		if (0 == (count %5))
+			std::cout << "Handled " << count << std::endl;
+	}
+}
+
+
+void WorkingSet::loadTextureUuids(FILE * in)
+{
+	char buffer[1024];
+
+	while (fgets(buffer, sizeof(buffer), in))
+	{
+		WorkingSet::Spec texture;
+		char * state(NULL);
+		char * token = strtok_r(buffer, " \t\n,", &state);
+		if (token && 36 == strlen(token))
+		{
+			// Close enough for this function
+			texture.mUuid = token;
+			texture.mOffset = 0;
+			texture.mLength = 0;
+			token = strtok_r(buffer, " \t\n,", &state);
+			if (token)
+			{
+				int offset(atoi(token));
+				token = strtok_r(buffer, " \t\n,", &state);
+				if (token)
+				{
+					int length(atoi(token));
+					texture.mOffset = offset;
+					texture.mLength = length;
+				}
+			}
+			mTextures.push_back(texture);
+		}
+	}
+	mRemaining = mLimit = mTextures.size();
+}
+
+
+int ssl_mutex_count(0);
+LLCoreInt::HttpMutex ** ssl_mutex_list = NULL;
+
+void init_curl()
+{
+	curl_global_init(CURL_GLOBAL_ALL);
+
+	ssl_mutex_count = CRYPTO_num_locks();
+	if (ssl_mutex_count > 0)
+	{
+		ssl_mutex_list = new LLCoreInt::HttpMutex * [ssl_mutex_count];
+		
+		for (int i(0); i < ssl_mutex_count; ++i)
+		{
+			ssl_mutex_list[i] = new LLCoreInt::HttpMutex;
+		}
+
+		CRYPTO_set_locking_callback(ssl_locking_callback);
+		CRYPTO_set_id_callback(ssl_thread_id_callback);
+	}
+}
+
+
+void term_curl()
+{
+	CRYPTO_set_locking_callback(NULL);
+	for (int i(0); i < ssl_mutex_count; ++i)
+	{
+		delete ssl_mutex_list[i];
+	}
+	delete [] ssl_mutex_list;
+}
+
+
+unsigned long ssl_thread_id_callback(void)
+{
+#if defined(WIN32)
+	return (unsigned long) GetCurrentThread();
+#else
+	return (unsigned long) pthread_self();
+#endif
+}
+
+
+void ssl_locking_callback(int mode, int type, const char * /* file */, int /* line */)
+{
+	if (type >= 0 && type < ssl_mutex_count)
+	{
+		if (mode & CRYPTO_LOCK)
+		{
+			ssl_mutex_list[type]->lock();
+		}
+		else
+		{
+			ssl_mutex_list[type]->unlock();
+		}
+	}
+}
+
+
+#if defined(WIN32)
+
+// Very much a subset of posix functionality.  Don't push
+// it too hard...
+int getopt(int argc, char * const argv[], const char *optstring)
+{
+	static int pos(0);
+	while (optind < argc)
+	{
+		if (pos == 0)
+		{
+			if (argv[optind][0] != '-')
+				return -1;
+			pos = 1;
+		}
+		if (! argv[optind][pos])
+		{
+			++optind;
+			pos = 0;
+			continue;
+		}
+		const char * thing(strchr(optstring, argv[optind][pos]));
+		if (! thing)
+		{
+			++optind;
+			return -1;
+		}
+		if (thing[1] == ':')
+		{
+			optarg = argv[++optind];
+			++optind;
+			pos = 0;
+		}
+		else
+		{
+			optarg = NULL;
+			++pos;
+		}
+		return *thing;
+	}
+	return -1;
+}
+
+#endif
+
+
+
+#if LL_WINDOWS
+
+#define	PSAPI_VERSION	1
+#include "windows.h"
+#include "psapi.h"
+
+class Metrics::MetricsImpl
+{
+public:
+	MetricsImpl()
+		{}
+
+	~MetricsImpl()
+		{}
+
+	void init(Metrics * metrics)
+		{
+			HANDLE self(GetCurrentProcess());		// Does not have to be closed
+			FILETIME ft_dummy, ft_system, ft_user;
+			GetProcessTimes(self, &ft_dummy, &ft_dummy, &ft_system, &ft_user);
+			ULARGE_INTEGER uli;
+			uli.u.LowPart = ft_system.dwLowDateTime;
+			uli.u.HighPart = ft_system.dwHighDateTime;
+			metrics->mStartSTime = uli.QuadPart / U64L(10);		// Convert to uS
+			uli.u.LowPart = ft_user.dwLowDateTime;
+			uli.u.HighPart = ft_user.dwHighDateTime;
+			metrics->mStartUTime = uli.QuadPart / U64L(10);
+			metrics->mStartWallTime = totalTime();
+		}
+
+	void sample(Metrics * metrics)
+		{
+			PROCESS_MEMORY_COUNTERS_EX	counters;
+
+			GetProcessMemoryInfo(GetCurrentProcess(),
+								 (PROCESS_MEMORY_COUNTERS *) &counters,
+								 sizeof(counters));
+			// Okay, PrivateUsage isn't truly VSZ but it will be
+			// a good tracker for leaks and fragmentation.  Work on
+			// a better estimator later...
+			SIZE_T vsz(counters.PrivateUsage);
+			metrics->mMaxVSZ = (std::max)(metrics->mMaxVSZ, U64(vsz));
+			metrics->mMinVSZ = (std::min)(metrics->mMinVSZ, U64(vsz));
+		}
+
+	void term(Metrics * metrics)
+		{
+			HANDLE self(GetCurrentProcess());		// Does not have to be closed
+			FILETIME ft_dummy, ft_system, ft_user;
+			GetProcessTimes(self, &ft_dummy, &ft_dummy, &ft_system, &ft_user);
+			ULARGE_INTEGER uli;
+			uli.u.LowPart = ft_system.dwLowDateTime;
+			uli.u.HighPart = ft_system.dwHighDateTime;
+			metrics->mEndSTime = uli.QuadPart / U64L(10);
+			uli.u.LowPart = ft_user.dwLowDateTime;
+			uli.u.HighPart = ft_user.dwHighDateTime;
+			metrics->mEndUTime = uli.QuadPart / U64L(10);
+			metrics->mEndWallTime = totalTime();
+		}
+
+protected:
+};
+
+#elif LL_DARWIN
+
+#include <sys/resource.h>
+#include <mach/mach.h>
+	
+class Metrics::MetricsImpl
+{
+public:
+	MetricsImpl()
+		{}
+
+	~MetricsImpl()
+		{}
+
+	void init(Metrics * metrics)
+		{
+			U64 utime, stime;
+
+			if (getTimes(&utime, &stime))
+			{
+				metrics->mStartSTime = stime;
+				metrics->mStartUTime = utime;
+			}
+			metrics->mStartWallTime = totalTime();
+			sample(metrics);
+		}
+
+	void sample(Metrics * metrics)
+		{
+			U64 vsz;
+			
+			if (getVM(&vsz))
+			{
+				metrics->mMaxVSZ = (std::max)(metrics->mMaxVSZ, vsz);
+				metrics->mMinVSZ = (std::min)(metrics->mMinVSZ, vsz);
+			}
+		}
+
+	void term(Metrics * metrics)
+		{
+			U64 utime, stime;
+
+			if (getTimes(&utime, &stime))
+			{
+				metrics->mEndSTime = stime;
+				metrics->mEndUTime = utime;
+			}
+			metrics->mEndWallTime = totalTime();
+		}
+
+protected:
+	bool getVM(U64 * vsz)
+		{
+			task_basic_info				task_info_block;
+			mach_msg_type_number_t		task_info_count(TASK_BASIC_INFO_COUNT);
+
+			if (KERN_SUCCESS != task_info(mach_task_self(),
+										  TASK_BASIC_INFO,
+										  (task_info_t) &task_info_block,
+										  &task_info_count))
+			{
+				return false;
+			}
+			* vsz = task_info_block.virtual_size;
+			return true;
+		}
+
+	bool getTimes(U64 * utime, U64 * stime)
+		{
+			struct rusage usage;
+
+			if (getrusage(RUSAGE_SELF, &usage))
+			{
+				return false;
+			}
+			* utime = U64(usage.ru_utime.tv_sec) * U64L(1000000) + usage.ru_utime.tv_usec;
+			* stime = U64(usage.ru_stime.tv_sec) * U64L(1000000) + usage.ru_stime.tv_usec;
+			return true;
+		}
+	
+};
+
+#else
+
+class Metrics::MetricsImpl
+{
+public:
+	MetricsImpl()
+		: mProcFS(NULL),
+		  mUsecsPerTick(U64L(0))
+		{}
+
+	
+	~MetricsImpl()
+		{
+			if (mProcFS)
+			{
+				fclose(mProcFS);
+				mProcFS = NULL;
+			}
+		}
+
+	void init(Metrics * metrics)
+		{
+			if (! mProcFS)
+			{
+				mProcFS = fopen("/proc/self/stat", "r");
+				if (! mProcFS)
+				{
+					const int errnum(errno);
+					LL_ERRS("Main") << "Error opening proc fs:  " << strerror(errnum) << LL_ENDL;
+				}
+			}
+
+			long ticks_per_sec(sysconf(_SC_CLK_TCK));
+			mUsecsPerTick = U64L(1000000) / ticks_per_sec;
+			U64 usecs_per_sec(mUsecsPerTick * ticks_per_sec);
+			if (900000 > usecs_per_sec || 1100000 < usecs_per_sec)
+			{
+				LL_ERRS("Main") << "Resolution problems using uSecs for ticks" << LL_ENDL;
+			}
+
+			U64 utime, stime;
+			if (scanProcFS(&utime, &stime, NULL))
+			{
+				metrics->mStartSTime = stime;
+				metrics->mStartUTime = utime;
+			}
+			metrics->mStartWallTime = totalTime();
+
+			sample(metrics);
+		}
+
+
+	void sample(Metrics * metrics)
+		{
+			U64 vsz;
+			if (scanProcFS(NULL, NULL, &vsz))
+			{
+				metrics->mMaxVSZ = (std::max)(metrics->mMaxVSZ, vsz);
+				metrics->mMinVSZ = (std::min)(metrics->mMinVSZ, vsz);
+			}
+		}
+
+
+	void term(Metrics * metrics)
+		{
+			U64 utime, stime;
+			if (scanProcFS(&utime, &stime, NULL))
+			{
+				metrics->mEndSTime = stime;
+				metrics->mEndUTime = utime;
+			}
+			metrics->mEndWallTime = totalTime();
+
+			sample(metrics);
+			
+			if (mProcFS)
+			{
+				fclose(mProcFS);
+				mProcFS = NULL;
+			}
+		}
+	
+protected:
+	bool scanProcFS(U64 * utime, U64 * stime, U64 * vsz)
+		{
+			if (mProcFS)
+			{
+				int i_dummy;
+				unsigned int ui_dummy;
+				unsigned long ul_dummy, user_ticks, sys_ticks, vsize;
+				long l_dummy, rss;
+				unsigned long long ull_dummy;
+				char c_dummy;
+				
+				char buffer[256];
+				
+				static const char * format("%d %*s %c %d %d %d %d %d %u %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %llu %lu %ld");
+
+				fseek(mProcFS, 0L, SEEK_SET);
+				size_t len = fread(buffer, 1, sizeof(buffer) - 1, mProcFS);
+				if (! len)
+				{
+					return false;
+				}
+				buffer[len] = '\0';
+				if (23 == sscanf(buffer, format,
+								 &i_dummy,				// pid
+								 // &s_dummy,			// command name
+								 &c_dummy,				// state
+								 &i_dummy,				// ppid
+								 &i_dummy,				// pgrp
+								 &i_dummy,				// session
+								 &i_dummy,				// terminal
+								 &i_dummy,				// terminal group id
+								 &ui_dummy,				// flags
+								 &ul_dummy,				// minor faults
+								 &ul_dummy,				// minor faults in children
+								 &ul_dummy,				// major faults
+								 &ul_dummy,				// major faults in children
+								 &user_ticks,
+								 &sys_ticks,
+								 &l_dummy,				// cutime
+								 &l_dummy,				// cstime
+								 &l_dummy,				// process priority
+								 &l_dummy,				// nice value
+								 &l_dummy,				// thread count
+								 &l_dummy,				// time to SIGALRM
+								 &ull_dummy,			// start time
+								 &vsize,
+								 &rss))
+				{
+					// Looks like we understand the line
+					if (utime)
+					{
+						*utime = user_ticks * mUsecsPerTick;
+					}
+
+					if (stime)
+					{
+						*stime = sys_ticks * mUsecsPerTick;
+					}
+					
+					if (vsz)
+					{
+						*vsz = vsize;
+					}
+					return true;
+				}
+			}
+			return false;
+		}
+	
+protected:
+	FILE *		mProcFS;
+	U64			mUsecsPerTick;
+	
+};
+
+
+#endif  // LL_WINDOWS
+
+Metrics::Metrics()
+	: mMaxVSZ(U64(0)),
+	  mMinVSZ(U64L(0xffffffffffffffff)),
+	  mStartWallTime(U64(0)),
+	  mEndWallTime(U64(0)),
+	  mStartUTime(U64(0)),
+	  mEndUTime(U64(0)),
+	  mStartSTime(U64(0)),
+	  mEndSTime(U64(0))
+{
+	mImpl = new MetricsImpl();
+}
+
+
+Metrics::~Metrics()
+{
+	delete mImpl;
+	mImpl = NULL;
+}
+
+
+void Metrics::init()
+{
+	mImpl->init(this);
+}
+
+
+void Metrics::sample()
+{
+	mImpl->sample(this);
+}
+
+
+void Metrics::term()
+{
+	mImpl->term(this);
+}
+
+	
diff --git a/indra/llcorehttp/httpcommon.cpp b/indra/llcorehttp/httpcommon.cpp
new file mode 100644
index 0000000000..f2fcbf77a3
--- /dev/null
+++ b/indra/llcorehttp/httpcommon.cpp
@@ -0,0 +1,179 @@
+/**
+ * @file httpcommon.cpp
+ * @brief 
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "httpcommon.h"
+
+#include <curl/curl.h>
+#include <string>
+#include <sstream>
+
+
+namespace LLCore
+{
+
+HttpStatus::type_enum_t EXT_CURL_EASY;
+HttpStatus::type_enum_t EXT_CURL_MULTI;
+HttpStatus::type_enum_t LLCORE;
+
+HttpStatus::operator unsigned long() const
+{
+	static const int shift(sizeof(unsigned long) * 4);
+
+	unsigned long result(((unsigned long) mType) << shift | (unsigned long) (int) mStatus);
+	return result;
+}
+
+
+std::string HttpStatus::toHex() const
+{
+	std::ostringstream result;
+	result.width(8);
+	result.fill('0');
+	result << std::hex << operator unsigned long();
+	return result.str();
+}
+
+
+std::string HttpStatus::toString() const
+{
+	static const char * llcore_errors[] =
+		{
+			"",
+			"HTTP error reply status",
+			"Services shutting down",
+			"Operation canceled",
+			"Invalid Content-Range header encountered",
+			"Request handle not found",
+			"Invalid datatype for argument or option",
+			"Option has not been explicitly set",
+			"Option is not dynamic and must be set early",
+			"Invalid HTTP status code received from server"
+		};
+	static const int llcore_errors_count(sizeof(llcore_errors) / sizeof(llcore_errors[0]));
+
+	static const struct
+	{
+		type_enum_t		mCode;
+		const char *	mText;
+	}
+	http_errors[] =
+		{
+			// Keep sorted by mCode, we binary search this list.
+			{ 100, "Continue" },
+			{ 101, "Switching Protocols" },
+			{ 200, "OK" },
+			{ 201, "Created" },
+			{ 202, "Accepted" },
+			{ 203, "Non-Authoritative Information" },
+			{ 204, "No Content" },
+			{ 205, "Reset Content" },
+			{ 206, "Partial Content" },
+			{ 300, "Multiple Choices" },
+			{ 301, "Moved Permanently" },
+			{ 302, "Found" },
+			{ 303, "See Other" },
+			{ 304, "Not Modified" },
+			{ 305, "Use Proxy" },
+			{ 307, "Temporary Redirect" },
+			{ 400, "Bad Request" },
+			{ 401, "Unauthorized" },
+			{ 402, "Payment Required" },
+			{ 403, "Forbidden" },
+			{ 404, "Not Found" },
+			{ 405, "Method Not Allowed" },
+			{ 406, "Not Acceptable" },
+			{ 407, "Proxy Authentication Required" },
+			{ 408, "Request Time-out" },
+			{ 409, "Conflict" },
+			{ 410, "Gone" },
+			{ 411, "Length Required" },
+			{ 412, "Precondition Failed" },
+			{ 413, "Request Entity Too Large" },
+			{ 414, "Request-URI Too Large" },
+			{ 415, "Unsupported Media Type" },
+			{ 416, "Requested range not satisfiable" },
+			{ 417, "Expectation Failed" },
+			{ 500, "Internal Server Error" },
+			{ 501, "Not Implemented" },
+			{ 502, "Bad Gateway" },
+			{ 503, "Service Unavailable" },
+			{ 504, "Gateway Time-out" },
+			{ 505, "HTTP Version not supported" }
+		};
+	static const int http_errors_count(sizeof(http_errors) / sizeof(http_errors[0]));
+	
+	if (*this)
+	{
+		return std::string("");
+	}
+	switch (mType)
+	{
+	case EXT_CURL_EASY:
+		return std::string(curl_easy_strerror(CURLcode(mStatus)));
+
+	case EXT_CURL_MULTI:
+		return std::string(curl_multi_strerror(CURLMcode(mStatus)));
+
+	case LLCORE:
+		if (mStatus >= 0 && mStatus < llcore_errors_count)
+		{
+			return std::string(llcore_errors[mStatus]);
+		}
+		break;
+
+	default:
+		if (isHttpStatus())
+		{
+			// Binary search for the error code and string
+			int bottom(0), top(http_errors_count);
+			while (true)
+			{
+				int at((bottom + top) / 2);
+				if (mType == http_errors[at].mCode)
+				{
+					return std::string(http_errors[at].mText);
+				}
+				if (at == bottom)
+				{
+					break;
+				}
+				else if (mType < http_errors[at].mCode)
+				{
+					top = at;
+				}
+				else
+				{
+					bottom = at;
+				}
+			}
+		}
+		break;
+	}
+	return std::string("Unknown error");
+}
+		
+} // end namespace LLCore
+
diff --git a/indra/llcorehttp/httpcommon.h b/indra/llcorehttp/httpcommon.h
new file mode 100644
index 0000000000..c0d4ec5aad
--- /dev/null
+++ b/indra/llcorehttp/httpcommon.h
@@ -0,0 +1,311 @@
+/**
+ * @file httpcommon.h
+ * @brief Public-facing declarations and definitions of common types
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_COMMON_H_
+#define	_LLCORE_HTTP_COMMON_H_
+
+/// @package LLCore::HTTP
+///
+/// This library implements a high-level, Indra-code-free client interface to
+/// HTTP services based on actual patterns found in the viewer and simulator.
+/// Interfaces are similar to those supplied by the legacy classes
+/// LLCurlRequest and LLHTTPClient.  To that is added a policy scheme that
+/// allows an application to specify connection behaviors:  limits on
+/// connections, HTTP keepalive, HTTP pipelining, retry-on-error limits, etc.
+///
+/// Features of the library include:
+/// - Single, private working thread where all transport and processing occurs.
+/// - Support for multiple consumers running in multiple threads.
+/// - Scatter/gather (a.k.a. buffer array) model for bulk data movement.
+/// - Reference counting used for many object instance lifetimes.
+/// - Minimal data sharing across threads for correctness and low latency.
+/// 
+/// The public interface is declared in a few key header files:
+/// - "llcorehttp/bufferarray.h"
+/// - "llcorehttp/httpcommon.h"
+/// - "llcorehttp/httphandler.h"
+/// - "llcorehttp/httpheaders.h"
+/// - "llcorehttp/httpoptions.h"
+/// - "llcorehttp/httprequest.h"
+/// - "llcorehttp/httpresponse.h"
+///
+/// The library is still under early development and particular users
+/// may need access to internal implementation details that are found
+/// in the _*.h header files.  But this is a crutch to be avoided if at
+/// all possible and probably indicates some interface work is neeeded.
+///
+/// Using the library is fairly easy.  Global setup needs a few
+/// steps:
+///
+/// - libcurl initialization including thread-safely callbacks for SSL:
+///   .  curl_global_init(...)
+///   .  CRYPTO_set_locking_callback(...)
+///   .  CRYPTO_set_id_callback(...)
+/// - HttpRequest::createService() called to instantiate singletons
+///   and support objects.
+///
+/// An HTTP consumer in an application, and an application may have many
+/// consumers, does a few things:
+///
+/// - Instantiate and retain an object based on HttpRequest.  This
+///   object becomes the portal into runtime services for the consumer.
+/// - Derive or mixin the HttpHandler class if you want notification
+///   when requests succeed or fail.  This object's onCompleted()
+///   method is invoked and an instance can be shared across
+///   requests.
+///
+/// Issuing a request is straightforward:
+/// - Construct a suitable URL.
+/// - Configure HTTP options for the request.  (optional)
+/// - Build a list of additional headers.  (optional)
+/// - Invoke one of the requestXXXX() methods (requestGetByteRange,
+///   requestPost, etc.) on the HttpRequest instance supplying the
+///   above along with a policy class, a priority and an optional
+///   pointer to an HttpHandler instance.  Work is then queued to
+///   the worker thread and occurs asynchronously.
+/// - Periodically invoke the update() method on the HttpRequest
+///   instance which performs completion notification to HttpHandler
+///   objects.
+/// - Do completion processing in your onCompletion() method.
+///
+/// Code fragments:
+/// Rather than a poorly-maintained example in comments, look in the
+/// example subdirectory which is a minimal yet functional tool to do
+/// GET request performance testing.  With four calls:
+///
+///   	init_curl();
+///     LLCore::HttpRequest::createService();
+///     LLCore::HttpRequest::startThread();
+///     LLCore::HttpRequest * hr = new LLCore::HttpRequest();
+///
+/// the program is basically ready to issue requests.
+///
+
+
+#include "linden_common.h"		// Modifies curl/curl.h interfaces
+
+#include <string>
+
+
+namespace LLCore
+{
+
+
+/// All queued requests are represented by an HttpHandle value.
+/// The invalid value is returned when a request failed to queue.
+/// The actual status for these failures is then fetched with
+/// HttpRequest::getStatus().
+///
+/// The handle is valid only for the life of a request.  On
+/// return from any HttpHandler notification, the handle immediately
+/// becomes invalid and may be recycled for other queued requests.
+
+typedef void * HttpHandle;
+#define LLCORE_HTTP_HANDLE_INVALID		(NULL)
+
+/// For internal scheduling and metrics, we use a microsecond
+/// timebase compatible with the environment.
+typedef U64 HttpTime;
+
+/// Error codes defined by the library itself as distinct from
+/// libcurl (or any other transport provider).
+enum HttpError
+{
+	// Successful value compatible with the libcurl codes.
+	HE_SUCCESS = 0,
+
+	// Intended for HTTP reply codes 100-999, indicates that
+	// the reply should be considered an error by the application.
+	HE_REPLY_ERROR = 1,
+	
+	// Service is shutting down and requested operation will
+	// not be queued or performed.
+	HE_SHUTTING_DOWN = 2,
+	
+	// Operation was canceled by request.
+	HE_OP_CANCELED = 3,
+	
+	// Invalid content range header received.
+	HE_INV_CONTENT_RANGE_HDR = 4,
+	
+	// Request handle not found
+	HE_HANDLE_NOT_FOUND = 5,
+
+	// Invalid datatype for option/setting
+	HE_INVALID_ARG = 6,
+
+	// Option hasn't been explicitly set
+	HE_OPT_NOT_SET = 7,
+	
+	// Option not dynamic, must be set during init phase
+	HE_OPT_NOT_DYNAMIC = 8,
+	
+	// Invalid HTTP status code returned by server
+	HE_INVALID_HTTP_STATUS = 9
+	
+}; // end enum HttpError
+
+
+/// HttpStatus encapsulates errors from libcurl (easy, multi), HTTP
+/// reply status codes and internal errors as well.  The encapsulation
+/// isn't expected to completely isolate the caller from libcurl but
+/// basic operational tests (success or failure) are provided.
+///
+/// Non-HTTP status are encoded as (type, status) with type being
+/// one of:  EXT_CURL_EASY, EXT_CURL_MULTI or LLCORE and status
+/// being the success/error code from that domain.  HTTP status
+/// is encoded as (status, error_flag).  Status should be in the
+/// range [100, 999] and error_flag is either HE_SUCCESS or
+/// HE_REPLY_ERROR to indicate whether this should be treated as
+/// a successful status or an error.  The application is responsible
+/// for making that determination and a range like [200, 299] isn't
+/// automatically assumed to be definitive.
+///
+/// Examples:
+///
+/// 1.  Construct a default, successful status code:
+///				HttpStatus();
+///
+/// 2.  Construct a successful, HTTP 200 status code:
+///				HttpStatus(200);
+///
+/// 3.  Construct a failed, HTTP 404 not-found status code:
+///				HttpStatus(404);
+///
+/// 4.  Construct a failed libcurl couldn't connect status code:
+///				HttpStatus(HttpStatus::EXT_CURL_EASY, CURLE_COULDNT_CONNECT);
+///
+/// 5.  Construct an HTTP 301 status code to be treated as success:
+///				HttpStatus(301, HE_SUCCESS);
+///
+
+struct HttpStatus
+{
+	typedef unsigned short type_enum_t;
+	
+	HttpStatus()
+		: mType(LLCORE),
+		  mStatus(HE_SUCCESS)
+		{}
+
+	HttpStatus(type_enum_t type, short status)
+		: mType(type),
+		  mStatus(status)
+		{}
+	
+	HttpStatus(int http_status)
+		: mType(http_status),
+		  mStatus(http_status >= 200 && http_status <= 299
+				  ? HE_SUCCESS
+				  : HE_REPLY_ERROR)
+		{
+			llassert(http_status >= 100 && http_status <= 999);
+		}
+	
+	HttpStatus(const HttpStatus & rhs)
+		: mType(rhs.mType),
+		  mStatus(rhs.mStatus)
+		{}
+
+	HttpStatus & operator=(const HttpStatus & rhs)
+		{
+			// Don't care if lhs & rhs are the same object
+
+			mType = rhs.mType;
+			mStatus = rhs.mStatus;
+			return *this;
+		}
+	
+	static const type_enum_t EXT_CURL_EASY = 0;
+	static const type_enum_t EXT_CURL_MULTI = 1;
+	static const type_enum_t LLCORE = 2;
+	
+	type_enum_t			mType;
+	short				mStatus;
+
+	/// Test for successful status in the code regardless
+	/// of error source (internal, libcurl).
+	///
+	/// @return			'true' when status is successful.
+	///
+	operator bool() const
+	{
+		return 0 == mStatus;
+	}
+
+	/// Inverse of previous operator.
+	///
+	/// @return			'true' on any error condition
+	bool operator !() const
+	{
+		return 0 != mStatus;
+	}
+
+	/// Equality and inequality tests to bypass bool conversion
+	/// which will do the wrong thing in conditional expressions.
+	bool operator==(const HttpStatus & rhs) const
+	{
+		return mType == rhs.mType && mStatus == rhs.mStatus;
+	}
+
+	bool operator!=(const HttpStatus & rhs) const
+	{
+		return ! operator==(rhs);
+	}
+
+	/// Convert to single numeric representation.  Mainly
+	/// for logging or other informal purposes.  Also
+	/// creates an ambiguous second path to integer conversion
+	/// which tends to find programming errors such as formatting
+	/// the status to a stream (operator<<).
+	operator unsigned long() const;
+	unsigned long toULong() const
+	{
+		return operator unsigned long();
+	}
+
+	/// And to convert to a hex string.
+	std::string toHex() const;
+	
+	/// Convert status to a string representation.  For
+	/// success, returns an empty string.  For failure
+	/// statuses, a string as appropriate for the source of
+	/// the error code (libcurl easy, libcurl multi, or
+	/// LLCore itself).
+	std::string toString() const;
+
+	/// Returns true if the status value represents an
+	/// HTTP response status (100 - 999).
+	bool isHttpStatus() const
+	{
+		return 	mType >= type_enum_t(100) && mType <= type_enum_t(999);
+	}
+	
+}; // end struct HttpStatus
+
+}  // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_COMMON_H_
diff --git a/indra/llcorehttp/httphandler.h b/indra/llcorehttp/httphandler.h
new file mode 100644
index 0000000000..9171e4e7b9
--- /dev/null
+++ b/indra/llcorehttp/httphandler.h
@@ -0,0 +1,88 @@
+/**
+ * @file httphandler.h
+ * @brief Public-facing declarations for the HttpHandler class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_HANDLER_H_
+#define	_LLCORE_HTTP_HANDLER_H_
+
+
+#include "httpcommon.h"
+
+
+namespace LLCore
+{
+
+class HttpResponse;
+
+
+/// HttpHandler defines an interface used by the library to
+/// notify library callers of significant events, currently
+/// request completion.  Callers must derive or mixin this class
+/// then provide an implementation of the @see onCompleted
+/// method to receive such notifications.  An instance may
+/// be shared by any number of requests and across instances
+/// of HttpRequest running in the same thread.
+///
+/// Threading:  HttpHandler itself is pure interface and is
+/// tread-compatible.  Most derivations, however, will have
+/// different constraints.
+///
+/// Allocation:  Not refcounted, may be stack allocated though
+/// that is rarely a good idea.  Queued requests and replies keep
+/// a naked pointer to the handler and this can result in a
+/// dangling pointer if lifetimes aren't managed correctly.
+
+class HttpHandler
+{
+public:
+	virtual ~HttpHandler()
+		{}
+
+	/// Method invoked during calls to @see update().  Each invocation
+	/// represents the completion of some requested operation.  Caller
+	/// can identify the request from the handle and interrogate the
+	/// response argument for success/failure, data and other information.
+	///
+	/// @param	handle			Identifier of the request generating
+	///							the notification.
+	/// @param	response		Supplies detailed information about
+	///							the request including status codes
+	///							(both programming and HTTP), HTTP body
+	///							data and encodings, headers, etc.
+	///							The response object is refcounted and
+	///							the called code may retain the object
+	///							by invoking @see addRef() on it.  The
+	///							library itself drops all references to
+	///							to object on return and never touches
+	///							it again.
+	///
+	virtual void onCompleted(HttpHandle handle, HttpResponse * response) = 0;
+
+};  // end class HttpHandler
+
+
+}   // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_HANDLER_H_
diff --git a/indra/llcorehttp/httpheaders.cpp b/indra/llcorehttp/httpheaders.cpp
new file mode 100644
index 0000000000..2832696271
--- /dev/null
+++ b/indra/llcorehttp/httpheaders.cpp
@@ -0,0 +1,44 @@
+/**
+ * @file httpheaders.cpp
+ * @brief Implementation of the HTTPHeaders class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "httpheaders.h"
+
+
+namespace LLCore
+{
+
+
+HttpHeaders::HttpHeaders()
+	: RefCounted(true)
+{}
+
+
+HttpHeaders::~HttpHeaders()
+{}
+
+
+}   // end namespace LLCore
+
diff --git a/indra/llcorehttp/httpheaders.h b/indra/llcorehttp/httpheaders.h
new file mode 100644
index 0000000000..3449daa3a1
--- /dev/null
+++ b/indra/llcorehttp/httpheaders.h
@@ -0,0 +1,87 @@
+/**
+ * @file httpheaders.h
+ * @brief Public-facing declarations for the HttpHeaders class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_HEADERS_H_
+#define	_LLCORE_HTTP_HEADERS_H_
+
+
+#include <string>
+
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+///
+/// Maintains an ordered list of name/value pairs representing
+/// HTTP header lines.  This is used both to provide additional
+/// headers when making HTTP requests and in responses when the
+/// caller has asked that headers be returned (not the default
+/// option).
+///
+/// @note
+/// This is a minimally-functional placeholder at the moment
+/// to fill out the class hierarchy.  The final class will be
+/// something else, probably more pair-oriented.  It's also
+/// an area where shared values are desirable so refcounting is
+/// already specced and a copy-on-write scheme imagined.
+/// Expect changes here.
+///
+/// Threading:  Not intrinsically thread-safe.  It *is* expected
+/// that callers will build these objects and then share them
+/// via reference counting with the worker thread.  The implication
+/// is that once an HttpHeader instance is handed to a request,
+/// the object must be treated as read-only.
+///
+/// Allocation:  Refcounted, heap only.  Caller of the
+/// constructor is given a refcount.
+///
+
+class HttpHeaders : public LLCoreInt::RefCounted
+{
+public:
+	/// @post In addition to the instance, caller has a refcount
+	/// to the instance.  A call to @see release() will destroy
+	/// the instance.
+	HttpHeaders();
+
+protected:
+	virtual ~HttpHeaders();						// Use release()
+
+	HttpHeaders(const HttpHeaders &);			// Not defined
+	void operator=(const HttpHeaders &);		// Not defined
+
+public:
+	typedef std::vector<std::string> container_t;
+	container_t			mHeaders;
+	
+}; // end class HttpHeaders
+
+}  // end namespace LLCore
+
+
+#endif	// _LLCORE_HTTP_HEADERS_H_
diff --git a/indra/llcorehttp/httpoptions.cpp b/indra/llcorehttp/httpoptions.cpp
new file mode 100644
index 0000000000..1699d19f8d
--- /dev/null
+++ b/indra/llcorehttp/httpoptions.cpp
@@ -0,0 +1,73 @@
+/**
+ * @file httpoptions.cpp
+ * @brief Implementation of the HTTPOptions class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "httpoptions.h"
+
+#include "_httpinternal.h"
+
+
+namespace LLCore
+{
+
+
+HttpOptions::HttpOptions()
+	: RefCounted(true),
+	  mWantHeaders(false),
+	  mTracing(HTTP_TRACE_OFF),
+	  mTimeout(HTTP_REQUEST_TIMEOUT_DEFAULT),
+	  mRetries(HTTP_RETRY_COUNT_DEFAULT)
+{}
+
+
+HttpOptions::~HttpOptions()
+{}
+
+
+void HttpOptions::setWantHeaders(bool wanted)
+{
+	mWantHeaders = wanted;
+}
+
+
+void HttpOptions::setTrace(long level)
+{
+	mTracing = int(level);
+}
+
+
+void HttpOptions::setTimeout(unsigned int timeout)
+{
+	mTimeout = timeout;
+}
+
+
+void HttpOptions::setRetries(unsigned int retries)
+{
+	mRetries = retries;
+}
+
+
+}   // end namespace LLCore
diff --git a/indra/llcorehttp/httpoptions.h b/indra/llcorehttp/httpoptions.h
new file mode 100644
index 0000000000..97e46a8cd3
--- /dev/null
+++ b/indra/llcorehttp/httpoptions.h
@@ -0,0 +1,106 @@
+/**
+ * @file httpoptions.h
+ * @brief Public-facing declarations for the HTTPOptions class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_OPTIONS_H_
+#define	_LLCORE_HTTP_OPTIONS_H_
+
+
+#include "httpcommon.h"
+
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+
+/// Really a struct in spirit, it provides options that
+/// modify HTTP requests.
+///
+/// Sharing instances across requests.  It's intended that
+/// these be shared across requests:  caller can create one
+/// of these, set it up as needed and then reference it
+/// repeatedly in HTTP operations.  But see the Threading
+/// note about references.
+///
+/// Threading:  While this class does nothing to ensure thread
+/// safety, it *is* intended to be shared between the application
+/// thread and the worker thread.  This means that once an instance
+/// is delivered to the library in request operations, the
+/// option data must not be written until all such requests
+/// complete and relinquish their references.
+///
+/// Allocation:  Refcounted, heap only.  Caller of the constructor
+/// is given a refcount.
+///
+class HttpOptions : public LLCoreInt::RefCounted
+{
+public:
+	HttpOptions();
+
+protected:
+	virtual ~HttpOptions();						// Use release()
+	
+	HttpOptions(const HttpOptions &);			// Not defined
+	void operator=(const HttpOptions &);		// Not defined
+
+public:
+	void				setWantHeaders(bool wanted);
+	bool				getWantHeaders() const
+		{
+			return mWantHeaders;
+		}
+	
+	void				setTrace(int long);
+	int					getTrace() const
+		{
+			return mTracing;
+		}
+
+	void				setTimeout(unsigned int timeout);
+	unsigned int		getTimeout() const
+		{
+			return mTimeout;
+		}
+
+	void				setRetries(unsigned int retries);
+	unsigned int		getRetries() const
+		{
+			return mRetries;
+		}
+	
+protected:
+	bool				mWantHeaders;
+	int					mTracing;
+	unsigned int		mTimeout;
+	unsigned int		mRetries;
+	
+}; // end class HttpOptions
+
+
+}  // end namespace HttpOptions
+
+#endif	// _LLCORE_HTTP_OPTIONS_H_
diff --git a/indra/llcorehttp/httprequest.cpp b/indra/llcorehttp/httprequest.cpp
new file mode 100644
index 0000000000..9b739a8825
--- /dev/null
+++ b/indra/llcorehttp/httprequest.cpp
@@ -0,0 +1,504 @@
+/**
+ * @file httprequest.cpp
+ * @brief Implementation of the HTTPRequest class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "httprequest.h"
+
+#include "_httprequestqueue.h"
+#include "_httpreplyqueue.h"
+#include "_httpservice.h"
+#include "_httppolicy.h"
+#include "_httpoperation.h"
+#include "_httpoprequest.h"
+#include "_httpopsetpriority.h"
+#include "_httpopcancel.h"
+#include "_httpopsetget.h"
+
+#include "lltimer.h"
+
+
+namespace
+{
+
+bool has_inited(false);
+
+}
+
+namespace LLCore
+{
+
+// ====================================
+// HttpRequest Implementation
+// ====================================
+
+
+HttpRequest::policy_t HttpRequest::sNextPolicyID(1);
+
+
+HttpRequest::HttpRequest()
+	: //HttpHandler(),
+	  mReplyQueue(NULL),
+	  mRequestQueue(NULL)
+{
+	mRequestQueue = HttpRequestQueue::instanceOf();
+	mRequestQueue->addRef();
+
+	mReplyQueue = new HttpReplyQueue();
+}
+
+
+HttpRequest::~HttpRequest()
+{
+	if (mRequestQueue)
+	{
+		mRequestQueue->release();
+		mRequestQueue = NULL;
+	}
+
+	if (mReplyQueue)
+	{
+		mReplyQueue->release();
+		mReplyQueue = NULL;
+	}
+}
+
+
+// ====================================
+// Policy Methods
+// ====================================
+
+
+HttpStatus HttpRequest::setPolicyGlobalOption(EGlobalPolicy opt, long value)
+{
+	if (HttpService::RUNNING == HttpService::instanceOf()->getState())
+	{
+		return HttpStatus(HttpStatus::LLCORE, HE_OPT_NOT_DYNAMIC);
+	}
+	return HttpService::instanceOf()->getGlobalOptions().set(opt, value);
+}
+
+
+HttpStatus HttpRequest::setPolicyGlobalOption(EGlobalPolicy opt, const std::string & value)
+{
+	if (HttpService::RUNNING == HttpService::instanceOf()->getState())
+	{
+		return HttpStatus(HttpStatus::LLCORE, HE_OPT_NOT_DYNAMIC);
+	}
+	return HttpService::instanceOf()->getGlobalOptions().set(opt, value);
+}
+
+
+HttpRequest::policy_t HttpRequest::createPolicyClass()
+{
+	if (HttpService::RUNNING == HttpService::instanceOf()->getState())
+	{
+		return 0;
+	}
+	return HttpService::instanceOf()->createPolicyClass();
+}
+
+
+HttpStatus HttpRequest::setPolicyClassOption(policy_t policy_id,
+											 EClassPolicy opt,
+											 long value)
+{
+	if (HttpService::RUNNING == HttpService::instanceOf()->getState())
+	{
+		return HttpStatus(HttpStatus::LLCORE, HE_OPT_NOT_DYNAMIC);
+	}
+	return HttpService::instanceOf()->getClassOptions(policy_id).set(opt, value);
+}
+
+
+// ====================================
+// Request Methods
+// ====================================
+
+
+HttpStatus HttpRequest::getStatus() const
+{
+	return mLastReqStatus;
+}
+
+
+HttpHandle HttpRequest::requestGet(policy_t policy_id,
+								   priority_t priority,
+								   const std::string & url,
+								   HttpOptions * options,
+								   HttpHeaders * headers,
+								   HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpRequest * op = new HttpOpRequest();
+	if (! (status = op->setupGet(policy_id, priority, url, options, headers)))
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	op->setReplyPath(mReplyQueue, user_handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+	
+	return handle;
+}
+
+
+HttpHandle HttpRequest::requestGetByteRange(policy_t policy_id,
+											priority_t priority,
+											const std::string & url,
+											size_t offset,
+											size_t len,
+											HttpOptions * options,
+											HttpHeaders * headers,
+											HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpRequest * op = new HttpOpRequest();
+	if (! (status = op->setupGetByteRange(policy_id, priority, url, offset, len, options, headers)))
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	op->setReplyPath(mReplyQueue, user_handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+	
+	return handle;
+}
+
+
+HttpHandle HttpRequest::requestPost(policy_t policy_id,
+									priority_t priority,
+									const std::string & url,
+									BufferArray * body,
+									HttpOptions * options,
+									HttpHeaders * headers,
+									HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpRequest * op = new HttpOpRequest();
+	if (! (status = op->setupPost(policy_id, priority, url, body, options, headers)))
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	op->setReplyPath(mReplyQueue, user_handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+	
+	return handle;
+}
+
+
+HttpHandle HttpRequest::requestPut(policy_t policy_id,
+								   priority_t priority,
+								   const std::string & url,
+								   BufferArray * body,
+								   HttpOptions * options,
+								   HttpHeaders * headers,
+								   HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpRequest * op = new HttpOpRequest();
+	if (! (status = op->setupPut(policy_id, priority, url, body, options, headers)))
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	op->setReplyPath(mReplyQueue, user_handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+	
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+	
+	return handle;
+}
+
+
+HttpHandle HttpRequest::requestNoOp(HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpNull * op = new HttpOpNull();
+	op->setReplyPath(mReplyQueue, user_handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+	
+	return handle;
+}
+
+
+HttpStatus HttpRequest::update(long usecs)
+{
+	HttpOperation * op(NULL);
+	
+	if (usecs)
+	{
+		const HttpTime limit(totalTime() + HttpTime(usecs));
+		while (limit >= totalTime() && (op = mReplyQueue->fetchOp()))
+		{
+			// Process operation
+			op->visitNotifier(this);
+		
+			// We're done with the operation
+			op->release();
+		}
+	}
+	else
+	{
+		// Same as above, just no time limit
+		HttpReplyQueue::OpContainer replies;
+		mReplyQueue->fetchAll(replies);
+		if (! replies.empty())
+		{
+			for (HttpReplyQueue::OpContainer::iterator iter(replies.begin());
+				 replies.end() != iter;
+				 ++iter)
+			{
+				// Swap op pointer for NULL;
+				op = *iter; *iter = NULL;	
+			
+				// Process operation
+				op->visitNotifier(this);
+		
+				// We're done with the operation
+				op->release();
+			}
+		}
+	}
+	
+	return HttpStatus();
+}
+
+
+
+
+// ====================================
+// Request Management Methods
+// ====================================
+
+HttpHandle HttpRequest::requestCancel(HttpHandle request, HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle ret_handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpCancel * op = new HttpOpCancel(request);
+	op->setReplyPath(mReplyQueue, user_handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return ret_handle;
+	}
+
+	mLastReqStatus = status;
+	ret_handle = static_cast<HttpHandle>(op);
+	
+	return ret_handle;
+}
+
+
+HttpHandle HttpRequest::requestSetPriority(HttpHandle request, priority_t priority,
+										   HttpHandler * handler)
+{
+	HttpStatus status;
+	HttpHandle ret_handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpSetPriority * op = new HttpOpSetPriority(request, priority);
+	op->setReplyPath(mReplyQueue, handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return ret_handle;
+	}
+
+	mLastReqStatus = status;
+	ret_handle = static_cast<HttpHandle>(op);
+	
+	return ret_handle;
+}
+
+
+// ====================================
+// Utility Methods
+// ====================================
+
+HttpStatus HttpRequest::createService()
+{
+	HttpStatus status;
+
+	if (! has_inited)
+	{
+		HttpRequestQueue::init();
+		HttpRequestQueue * rq = HttpRequestQueue::instanceOf();
+		HttpService::init(rq);
+		has_inited = true;
+	}
+	
+	return status;
+}
+
+
+HttpStatus HttpRequest::destroyService()
+{
+	HttpStatus status;
+
+	if (has_inited)
+	{
+		HttpService::term();
+		HttpRequestQueue::term();
+		has_inited = false;
+	}
+	
+	return status;
+}
+
+
+HttpStatus HttpRequest::startThread()
+{
+	HttpStatus status;
+
+	HttpService::instanceOf()->startThread();
+	
+	return status;
+}
+
+
+HttpHandle HttpRequest::requestStopThread(HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpStop * op = new HttpOpStop();
+	op->setReplyPath(mReplyQueue, user_handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+
+	return handle;
+}
+
+
+HttpHandle HttpRequest::requestSpin(int mode)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpSpin * op = new HttpOpSpin(mode);
+	op->setReplyPath(mReplyQueue, NULL);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+
+	return handle;
+}
+
+// ====================================
+// Dynamic Policy Methods
+// ====================================
+
+HttpHandle HttpRequest::requestSetHttpProxy(const std::string & proxy, HttpHandler * handler)
+{
+	HttpStatus status;
+	HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpSetGet * op = new HttpOpSetGet();
+	op->setupSet(GP_HTTP_PROXY, proxy);
+	op->setReplyPath(mReplyQueue, handler);
+	if (! (status = mRequestQueue->addOp(op)))			// transfers refcount
+	{
+		op->release();
+		mLastReqStatus = status;
+		return handle;
+	}
+
+	mLastReqStatus = status;
+	handle = static_cast<HttpHandle>(op);
+
+	return handle;
+}
+
+
+}   // end namespace LLCore
+
diff --git a/indra/llcorehttp/httprequest.h b/indra/llcorehttp/httprequest.h
new file mode 100644
index 0000000000..ab2f302d34
--- /dev/null
+++ b/indra/llcorehttp/httprequest.h
@@ -0,0 +1,535 @@
+/**
+ * @file httprequest.h
+ * @brief Public-facing declarations for HttpRequest class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_REQUEST_H_
+#define	_LLCORE_HTTP_REQUEST_H_
+
+
+#include "httpcommon.h"
+#include "httphandler.h"
+
+
+namespace LLCore
+{
+
+class HttpRequestQueue;
+class HttpReplyQueue;
+class HttpService;
+class HttpOptions;
+class HttpHeaders;
+class HttpOperation;
+class BufferArray;
+
+/// HttpRequest supplies the entry into the HTTP transport
+/// services in the LLCore libraries.  Services provided include:
+///
+/// - Some, but not all, global initialization of libcurl.
+/// - Starting asynchronous, threaded HTTP requests.
+/// - Definition of policy classes affect request handling.
+/// - Utilities to control request options and headers
+///
+/// Requests
+///
+/// The class supports the current HTTP request operations:
+///
+/// - requestGetByteRange:  GET with Range header for a single range of bytes
+///
+/// Policy Classes
+///
+/// <TBD>
+///
+/// Usage
+///
+/// <TBD>
+///
+/// Threading:  An instance may only be used by one application/
+/// consumer thread.  But a thread may have as many instances of
+/// this as it likes.
+///
+/// Allocation:  Not refcounted, may be stack allocated though that
+/// hasn't been tested.  Queued requests can still run and any
+/// queued replies will keep refcounts to the reply queue leading
+/// to memory leaks.
+///
+/// @pre Before using this class (static or instances), some global
+/// initialization is required.  See @see httpcommon.h for more information.
+///
+/// @nosubgrouping
+///
+
+class HttpRequest
+{
+public:
+	HttpRequest();
+	virtual ~HttpRequest();
+
+private:
+	HttpRequest(const HttpRequest &);			// Disallowed
+	void operator=(const HttpRequest &);		// Disallowed		
+
+public:
+	typedef unsigned int policy_t;
+	typedef unsigned int priority_t;
+	
+public:
+	/// @name PolicyMethods
+	/// @{
+
+	/// Represents a default, catch-all policy class that guarantees
+	/// eventual service for any HTTP request.
+	static const int DEFAULT_POLICY_ID = 0;
+
+	enum EGlobalPolicy
+	{
+		/// Maximum number of connections the library will use to
+		/// perform operations.  This is somewhat soft as the underlying
+		/// transport will cache some connections (up to 5).
+
+		/// A long value setting the maximum number of connections
+		/// allowed over all policy classes.  Note that this will be
+		/// a somewhat soft value.  There may be an additional five
+		/// connections per policy class depending upon runtime
+		/// behavior.
+		GP_CONNECTION_LIMIT,
+
+		/// String containing a system-appropriate directory name
+		/// where SSL certs are stored.
+		GP_CA_PATH,
+
+		/// String giving a full path to a file containing SSL certs.
+		GP_CA_FILE,
+
+		/// String of host/port to use as simple HTTP proxy.  This is
+		/// going to change in the future into something more elaborate
+		/// that may support richer schemes.
+		GP_HTTP_PROXY,
+
+		/// Long value that if non-zero enables the use of the
+		/// traditional LLProxy code for http/socks5 support.  If
+		/// enabled, has priority over GP_HTTP_PROXY.
+		GP_LLPROXY,
+
+		/// Long value setting the logging trace level for the
+		/// library.  Possible values are:
+		/// 0 - No tracing (default)
+		/// 1 - Basic tracing of request start, stop and major events.
+		/// 2 - Connection, header and payload size information from
+		///     HTTP transactions.
+		/// 3 - Partial logging of payload itself.
+		///
+		/// These values are also used in the trace modes for
+		/// individual requests in HttpOptions.  Also be aware that
+		/// tracing tends to impact performance of the viewer.
+		GP_TRACE
+	};
+
+	/// Set a parameter on a global policy option.  Calls
+	/// made after the start of the servicing thread are
+	/// not honored and return an error status.
+	///
+	/// @param opt		Enum of option to be set.
+	/// @param value	Desired value of option.
+	/// @return			Standard status code.
+	static HttpStatus setPolicyGlobalOption(EGlobalPolicy opt, long value);
+	static HttpStatus setPolicyGlobalOption(EGlobalPolicy opt, const std::string & value);
+
+	/// Create a new policy class into which requests can be made.
+	///
+	/// @return			If positive, the policy_id used to reference
+	///					the class in other methods.  If 0, an error
+	///					occurred and @see getStatus() may provide more
+	///					detail on the reason.
+	static policy_t createPolicyClass();
+
+	enum EClassPolicy
+	{
+		/// Limits the number of connections used for the class.
+		CP_CONNECTION_LIMIT,
+
+		/// Limits the number of connections used for a single
+		/// literal address/port pair within the class.
+		CP_PER_HOST_CONNECTION_LIMIT,
+
+		/// Suitable requests are allowed to pipeline on their
+		/// connections when they ask for it.
+		CP_ENABLE_PIPELINING
+	};
+	
+	/// Set a parameter on a class-based policy option.  Calls
+	/// made after the start of the servicing thread are
+	/// not honored and return an error status.
+	///
+	/// @param policy_id		ID of class as returned by @see createPolicyClass().
+	/// @param opt				Enum of option to be set.
+	/// @param value			Desired value of option.
+	/// @return					Standard status code.
+	static HttpStatus setPolicyClassOption(policy_t policy_id, EClassPolicy opt, long value);
+
+	/// @}
+
+	/// @name RequestMethods
+	///
+	/// @{
+
+	/// Some calls expect to succeed as the normal part of operation and so
+	/// return a useful value rather than a status.  When they do fail, the
+	/// status is saved and can be fetched with this method.
+	///
+	/// @return			Status of the failing method invocation.  If the
+	///					preceding call succeeded or other HttpStatus
+	///					returning calls immediately preceded this method,
+	///					the returned value may not be reliable.
+	///
+	HttpStatus getStatus() const;
+
+	/// Queue a full HTTP GET request to be issued for entire entity.
+	/// The request is queued and serviced by the working thread and
+	/// notification of completion delivered to the optional HttpHandler
+	/// argument during @see update() calls.
+	///
+	/// With a valid handle returned, it can be used to reference the
+	/// request in other requests (like cancellation) and will be an
+	/// argument when any HttpHandler object is invoked.
+	///
+	/// Headers supplied by default:
+	/// - Connection: keep-alive
+	/// - Accept: */*
+	/// - Accept-Encoding: deflate, gzip
+	/// - Keep-alive: 300
+	/// - Host: <stuff>
+	///
+	/// Some headers excluded by default:
+	/// - Pragma:
+	/// - Cache-control:
+	/// - Range:
+	/// - Transfer-Encoding:
+	/// - Referer:
+	///
+	/// @param	policy_id		Default or user-defined policy class under
+	///							which this request is to be serviced.
+	/// @param	priority		Standard priority scheme inherited from
+	///							Indra code base (U32-type scheme).
+	/// @param	url				URL with any encoded query parameters to
+	///							be accessed.
+	/// @param	options			Optional instance of an HttpOptions object
+	///							to provide additional controls over the request
+	///							function for this request only.  Any such
+	///							object then becomes shared-read across threads
+	///							and no code should modify the HttpOptions
+	///							instance.
+	/// @param	headers			Optional instance of an HttpHeaders object
+	///							to provide additional and/or overridden
+	///							headers for the request.  As with options,
+	///							the instance becomes shared-read across threads
+	///							and no code should modify the HttpHeaders
+	///							instance.
+	/// @param	handler			Optional pointer to an HttpHandler instance
+	///							whose onCompleted() method will be invoked
+	///							during calls to update().  This is a non-
+	///							reference-counted object which would be a
+	///							problem for shutdown and other edge cases but
+	///							the pointer is only dereferenced during
+	///							calls to update().
+	///
+	/// @return					The handle of the request if successfully
+	///							queued or LLCORE_HTTP_HANDLE_INVALID if the
+	///							request could not be queued.  In the latter
+	///							case, @see getStatus() will return more info.
+	///
+	HttpHandle requestGet(policy_t policy_id,
+						  priority_t priority,
+						  const std::string & url,
+						  HttpOptions * options,
+						  HttpHeaders * headers,
+						  HttpHandler * handler);
+
+
+	/// Queue a full HTTP GET request to be issued with a 'Range' header.
+	/// The request is queued and serviced by the working thread and
+	/// notification of completion delivered to the optional HttpHandler
+	/// argument during @see update() calls.
+	///
+	/// With a valid handle returned, it can be used to reference the
+	/// request in other requests (like cancellation) and will be an
+	/// argument when any HttpHandler object is invoked.
+	///
+	/// Headers supplied by default:
+	/// - Connection: keep-alive
+	/// - Accept: */*
+	/// - Accept-Encoding: deflate, gzip
+	/// - Keep-alive: 300
+	/// - Host: <stuff>
+	/// - Range: <stuff>  (will be omitted if offset == 0 and len == 0)
+	///
+	/// Some headers excluded by default:
+	/// - Pragma:
+	/// - Cache-control:
+	/// - Transfer-Encoding:
+	/// - Referer:
+	///
+	/// @param	policy_id		@see requestGet()
+	/// @param	priority		"
+	/// @param	url				"
+	/// @param	offset			Offset of first byte into resource to be returned.
+	/// @param	len				Count of bytes to be returned
+	/// @param	options			@see requestGet()
+	/// @param	headers			"
+	/// @param	handler			"
+	/// @return					"
+	///
+	HttpHandle requestGetByteRange(policy_t policy_id,
+								   priority_t priority,
+								   const std::string & url,
+								   size_t offset,
+								   size_t len,
+								   HttpOptions * options,
+								   HttpHeaders * headers,
+								   HttpHandler * handler);
+
+
+	/// Queue a full HTTP POST.  Query arguments and body may
+	/// be provided.  Caller is responsible for escaping and
+	/// encoding and communicating the content types.
+	///
+	/// Headers supplied by default:
+	/// - Connection: keep-alive
+	/// - Accept: */*
+	/// - Accept-Encoding: deflate, gzip
+	/// - Keep-Alive: 300
+	/// - Host: <stuff>
+	/// - Content-Length: <digits>
+	/// - Content-Type: application/x-www-form-urlencoded
+	///
+	/// Some headers excluded by default:
+	/// - Pragma:
+	/// - Cache-Control:
+	/// - Transfer-Encoding: ... chunked ...
+	/// - Referer:
+	/// - Content-Encoding:
+	/// - Expect:
+	///
+	/// @param	policy_id		@see requestGet()
+	/// @param	priority		"
+	/// @param	url				"
+	/// @param	body			Byte stream to be sent as the body.  No
+	///							further encoding or escaping will be done
+	///							to the content.
+	/// @param	options			@see requestGet()K(optional)
+	/// @param	headers			"
+	/// @param	handler			"
+	/// @return					"
+	///
+	HttpHandle requestPost(policy_t policy_id,
+						   priority_t priority,
+						   const std::string & url,
+						   BufferArray * body,
+						   HttpOptions * options,
+						   HttpHeaders * headers,
+						   HttpHandler * handler);
+
+
+	/// Queue a full HTTP PUT.  Query arguments and body may
+	/// be provided.  Caller is responsible for escaping and
+	/// encoding and communicating the content types.
+	///
+	/// Headers supplied by default:
+	/// - Connection: keep-alive
+	/// - Accept: */*
+	/// - Accept-Encoding: deflate, gzip
+	/// - Keep-Alive: 300
+	/// - Host: <stuff>
+	/// - Content-Length: <digits>
+	///
+	/// Some headers excluded by default:
+	/// - Pragma:
+	/// - Cache-Control:
+	/// - Transfer-Encoding: ... chunked ...
+	/// - Referer:
+	/// - Content-Encoding:
+	/// - Expect:
+	/// - Content-Type:
+	///
+	/// @param	policy_id		@see requestGet()
+	/// @param	priority		"
+	/// @param	url				"
+	/// @param	body			Byte stream to be sent as the body.  No
+	///							further encoding or escaping will be done
+	///							to the content.
+	/// @param	options			@see requestGet()K(optional)
+	/// @param	headers			"
+	/// @param	handler			"
+	/// @return					"
+	///
+	HttpHandle requestPut(policy_t policy_id,
+						  priority_t priority,
+						  const std::string & url,
+						  BufferArray * body,
+						  HttpOptions * options,
+						  HttpHeaders * headers,
+						  HttpHandler * handler);
+
+
+	/// Queue a NoOp request.
+	/// The request is queued and serviced by the working thread which
+	/// immediately processes it and returns the request to the reply
+	/// queue.
+	///
+	/// @param	handler			@see requestGet()
+	/// @return					"
+	///
+	HttpHandle requestNoOp(HttpHandler * handler);
+
+	/// While all the heavy work is done by the worker thread, notifications
+	/// must be performed in the context of the application thread.  These
+	/// are done synchronously during calls to this method which gives the
+	/// library control so notification can be performed.  Application handlers
+	/// are expected to return 'quickly' and do any significant processing
+	/// outside of the notification callback to onCompleted().
+	///
+	/// @param	usecs			Maximum number of wallclock microseconds to
+	///							spend in the call.  As hinted at above, this
+	///							is partly a function of application code so it's
+	///							a soft limit.  A '0' value will run without
+	///							time limit until everything queued has been
+	///							delivered.
+	///
+	/// @return					Standard status code.
+	HttpStatus update(long usecs);
+
+	/// @}
+	
+	/// @name RequestMgmtMethods
+	///
+	/// @{
+	
+	HttpHandle requestCancel(HttpHandle request, HttpHandler *);
+
+	/// Request that a previously-issued request be reprioritized.
+	/// The status of whether the change itself succeeded arrives
+	/// via notification.  
+	///
+	/// @param	request			Handle of previously-issued request to
+	///							be changed.
+	/// @param	priority		New priority value.
+	/// @param	handler			@see requestGet()
+	/// @return					"
+	///
+	HttpHandle requestSetPriority(HttpHandle request, priority_t priority, HttpHandler * handler);
+
+	/// @}
+
+	/// @name UtilityMethods
+	///
+	/// @{
+
+	/// Initialization method that needs to be called before queueing any
+	/// requests.  Doesn't start the worker thread and may be called befoer
+	/// or after policy setup.
+	static HttpStatus createService();
+
+	/// Mostly clean shutdown of services prior to exit.  Caller is expected
+	/// to have stopped a running worker thread before calling this.
+	static HttpStatus destroyService();
+
+	/// Called once after @see createService() to start the worker thread.
+	/// Stopping the thread is achieved by requesting it via @see requestStopThread().
+	/// May be called before or after requests are issued.
+	static HttpStatus startThread();
+
+	/// Queues a request to the worker thread to have it stop processing
+	/// and exit (without exiting the program).  When the operation is
+	/// picked up by the worker thread, it immediately processes it and
+	/// begins detaching from refcounted resources like request and
+	/// reply queues and then returns to the host OS.  It *does* queue a
+	/// reply to give the calling application thread a notification that
+	/// the operation has been performed.
+	///
+	/// @param	handler			(optional)
+	/// @return					The handle of the request if successfully
+	///							queued or LLCORE_HTTP_HANDLE_INVALID if the
+	///							request could not be queued.  In the latter
+	///							case, @see getStatus() will return more info.
+	///							As the request cannot be cancelled, the handle
+	///							is generally not useful.
+	///
+	HttpHandle requestStopThread(HttpHandler * handler);
+
+	/// Queue a Spin request.
+	/// DEBUG/TESTING ONLY.  This puts the worker into a CPU spin for
+	/// test purposes.
+	///
+	/// @param	mode			0 for hard spin, 1 for soft spin
+	/// @return					Standard handle return cases.
+	///
+	HttpHandle requestSpin(int mode);
+
+	/// @}
+	
+	/// @name DynamicPolicyMethods
+	///
+	/// @{
+
+	/// Request that a running transport pick up a new proxy setting.
+	/// An empty string will indicate no proxy is to be used.
+	HttpHandle requestSetHttpProxy(const std::string & proxy, HttpHandler * handler);
+
+    /// @}
+
+protected:
+	void generateNotification(HttpOperation * op);
+
+private:
+	/// @name InstanceData
+	///
+	/// @{
+	HttpStatus			mLastReqStatus;
+	HttpReplyQueue *	mReplyQueue;
+	HttpRequestQueue *	mRequestQueue;
+	
+	/// @}
+	
+	// ====================================
+	/// @name GlobalState
+	///
+	/// @{
+	///
+	/// Must be established before any threading is allowed to
+	/// start.
+	///
+	static policy_t		sNextPolicyID;
+	
+	/// @}
+	// End Global State
+	// ====================================
+	
+};  // end class HttpRequest
+
+
+}  // end namespace LLCore
+
+
+
+#endif	// _LLCORE_HTTP_REQUEST_H_
diff --git a/indra/llcorehttp/httpresponse.cpp b/indra/llcorehttp/httpresponse.cpp
new file mode 100644
index 0000000000..a552e48a1b
--- /dev/null
+++ b/indra/llcorehttp/httpresponse.cpp
@@ -0,0 +1,91 @@
+/**
+ * @file httpresponse.cpp
+ * @brief 
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "httpresponse.h"
+#include "bufferarray.h"
+#include "httpheaders.h"
+
+
+namespace LLCore
+{
+
+
+HttpResponse::HttpResponse()
+	: LLCoreInt::RefCounted(true),
+	  mReplyOffset(0U),
+	  mReplyLength(0U),
+	  mReplyFullLength(0U),
+	  mBufferArray(NULL),
+	  mHeaders(NULL)
+{}
+
+
+HttpResponse::~HttpResponse()
+{
+	setBody(NULL);
+	setHeaders(NULL);
+}
+
+
+void HttpResponse::setBody(BufferArray * ba)
+{
+	if (mBufferArray == ba)
+		return;
+	
+	if (mBufferArray)
+	{
+		mBufferArray->release();
+	}
+
+	if (ba)
+	{
+		ba->addRef();
+	}
+	
+	mBufferArray = ba;
+}
+
+
+void HttpResponse::setHeaders(HttpHeaders * headers)
+{
+	if (mHeaders == headers)
+		return;
+	
+	if (mHeaders)
+	{
+		mHeaders->release();
+	}
+
+	if (headers)
+	{
+		headers->addRef();
+	}
+	
+	mHeaders = headers;
+}
+
+
+}   // end namespace LLCore
diff --git a/indra/llcorehttp/httpresponse.h b/indra/llcorehttp/httpresponse.h
new file mode 100644
index 0000000000..4a481db6ac
--- /dev/null
+++ b/indra/llcorehttp/httpresponse.h
@@ -0,0 +1,161 @@
+/**
+ * @file httpresponse.h
+ * @brief Public-facing declarations for the HttpResponse class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LLCORE_HTTP_RESPONSE_H_
+#define	_LLCORE_HTTP_RESPONSE_H_
+
+
+#include <string>
+
+#include "httpcommon.h"
+
+#include "_refcounted.h"
+
+
+namespace LLCore
+{
+
+class BufferArray;
+class HttpHeaders;
+
+/// HttpResponse is instantiated by the library and handed to
+/// the caller during callbacks to the handler.  It supplies
+/// all the status, header and HTTP body data the caller is
+/// interested in.  Methods provide simple getters to return
+/// individual pieces of the response.
+///
+/// Typical usage will have the caller interrogate the object
+/// and return from the handler callback.  Instances are refcounted
+/// and callers can bump the count and retain the object as needed.
+///
+/// Threading:  Not intrinsically thread-safe.
+///
+/// Allocation:  Refcounted, heap only.  Caller of the constructor
+/// is given a refcount.
+///
+class HttpResponse : public LLCoreInt::RefCounted
+{
+public:
+	HttpResponse();
+
+protected:
+	virtual ~HttpResponse();							// Use release()
+	
+	HttpResponse(const HttpResponse &);					// Not defined
+	void operator=(const HttpResponse &);				// Not defined
+	
+public:
+	/// Returns the final status of the requested operation.
+	///
+	HttpStatus getStatus() const
+		{
+			return mStatus;
+		}
+
+	void setStatus(const HttpStatus & status)
+		{
+			mStatus = status;
+		}
+
+	/// Simple getter for the response body returned as a scatter/gather
+	/// buffer.  If the operation doesn't produce data (such as the Null
+	/// or StopThread operations), this may be NULL.
+	///
+	/// Caller can hold onto the response by incrementing the reference
+	/// count of the returned object.
+	BufferArray * getBody() const
+		{
+			return mBufferArray;
+		}
+
+	/// Set the response data in the instance.  Will drop the reference
+	/// count to any existing data and increment the count of that passed
+	/// in.  It is legal to set the data to NULL.
+	void setBody(BufferArray * ba);
+	
+	/// And a getter for the headers.  And as with @see getResponse(),
+	/// if headers aren't available because the operation doesn't produce
+	/// any or delivery of headers wasn't requested in the options, this
+	/// will be NULL.
+	///
+	/// Caller can hold onto the headers by incrementing the reference
+	/// count of the returned object.
+	HttpHeaders * getHeaders() const
+		{
+			return mHeaders;
+		}
+
+	/// Behaves like @see setResponse() but for header data.
+	void setHeaders(HttpHeaders * headers);
+
+	/// If a 'Range:' header was used, these methods are involved
+	/// in setting and returning data about the actual response.
+	/// If both @offset and @length are returned as 0, we probably
+	/// didn't get a Content-Range header in the response.  This
+	/// occurs with various Capabilities-based services and the
+	/// caller is going to have to make assumptions on receipt of
+	/// a 206 status.  The @full value may also be zero in cases of
+	/// parsing problems or a wild-carded length response.
+	void getRange(unsigned int * offset, unsigned int * length, unsigned int * full) const
+		{
+			*offset = mReplyOffset;
+			*length = mReplyLength;
+			*full = mReplyFullLength;
+		}
+
+	void setRange(unsigned int offset, unsigned int length, unsigned int full_length)
+		{
+			mReplyOffset = offset;
+			mReplyLength = length;
+			mReplyFullLength = full_length;
+		}
+
+	///
+	const std::string & getContentType() const
+		{
+			return mContentType;
+		}
+
+	void setContentType(const std::string & con_type)
+		{
+			mContentType = con_type;
+		}
+
+protected:
+	// Response data here
+	HttpStatus			mStatus;
+	unsigned int		mReplyOffset;
+	unsigned int		mReplyLength;
+	unsigned int		mReplyFullLength;
+	BufferArray *		mBufferArray;
+	HttpHeaders *		mHeaders;
+	std::string			mContentType;
+};
+
+
+}   // end namespace LLCore
+
+#endif	// _LLCORE_HTTP_RESPONSE_H_
diff --git a/indra/llcorehttp/tests/llcorehttp_test.cpp b/indra/llcorehttp/tests/llcorehttp_test.cpp
new file mode 100644
index 0000000000..e863ddd13f
--- /dev/null
+++ b/indra/llcorehttp/tests/llcorehttp_test.cpp
@@ -0,0 +1,175 @@
+/** 
+ * @file llcorehttp_test
+ * @brief Main test runner
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llcorehttp_test.h"
+
+#include <iostream>
+#include <sstream>
+
+// These are not the right way in viewer for some reason:
+// #include <tut/tut.hpp>
+// #include <tut/tut_reporter.hpp>
+// This works:
+#include "../test/lltut.h"
+
+// Pull in each of the test sets
+#include "test_bufferarray.hpp"
+#include "test_bufferstream.hpp"
+#include "test_httpstatus.hpp"
+#include "test_refcounted.hpp"
+#include "test_httpoperation.hpp"
+#include "test_httprequest.hpp"
+#include "test_httpheaders.hpp"
+#include "test_httprequestqueue.hpp"
+
+#include "llproxy.h"
+
+unsigned long ssl_thread_id_callback(void);
+void ssl_locking_callback(int mode, int type, const char * file, int line);
+
+#if 0	// lltut provides main and runner
+
+namespace tut
+{
+	test_runner_singleton runner;
+}
+
+int main()
+{
+	curl_global_init(CURL_GLOBAL_ALL);
+
+	// *FIXME:  Need threaded/SSL curl setup here.
+	
+	tut::reporter reporter;
+
+	tut::runner.get().set_callback(&reporter);
+	tut::runner.get().run_tests();
+	return !reporter.all_ok();
+
+	curl_global_cleanup();
+}
+
+#endif // 0
+
+int ssl_mutex_count(0);
+LLCoreInt::HttpMutex ** ssl_mutex_list = NULL;
+
+void init_curl()
+{
+	curl_global_init(CURL_GLOBAL_ALL);
+
+	ssl_mutex_count = CRYPTO_num_locks();
+	if (ssl_mutex_count > 0)
+	{
+		ssl_mutex_list = new LLCoreInt::HttpMutex * [ssl_mutex_count];
+		
+		for (int i(0); i < ssl_mutex_count; ++i)
+		{
+			ssl_mutex_list[i] = new LLCoreInt::HttpMutex;
+		}
+
+		CRYPTO_set_locking_callback(ssl_locking_callback);
+		CRYPTO_set_id_callback(ssl_thread_id_callback);
+	}
+
+	LLProxy::getInstance();
+}
+
+
+void term_curl()
+{
+	LLProxy::cleanupClass();
+	
+	CRYPTO_set_locking_callback(NULL);
+	for (int i(0); i < ssl_mutex_count; ++i)
+	{
+		delete ssl_mutex_list[i];
+	}
+	delete [] ssl_mutex_list;
+}
+
+
+unsigned long ssl_thread_id_callback(void)
+{
+#if defined(WIN32)
+	return (unsigned long) GetCurrentThread();
+#else
+	return (unsigned long) pthread_self();
+#endif
+}
+
+
+void ssl_locking_callback(int mode, int type, const char * /* file */, int /* line */)
+{
+	if (type >= 0 && type < ssl_mutex_count)
+	{
+		if (mode & CRYPTO_LOCK)
+		{
+			ssl_mutex_list[type]->lock();
+		}
+		else
+		{
+			ssl_mutex_list[type]->unlock();
+		}
+	}
+}
+
+
+std::string get_base_url()
+{
+	const char * env(getenv("LL_TEST_PORT"));
+
+	if (! env)
+	{
+		std::cerr << "LL_TEST_PORT environment variable missing." << std::endl;
+		std::cerr << "Test expects to run in test_llcorehttp_peer.py script." << std::endl;
+		tut::ensure("LL_TEST_PORT set in environment", NULL != env);
+	}
+
+	int port(atoi(env));
+	std::ostringstream out;
+	out << "http://localhost:" << port << "/";
+	return out.str();
+}
+
+
+void stop_thread(LLCore::HttpRequest * req)
+{
+	if (req)
+	{
+		req->requestStopThread(NULL);
+	
+		int count = 0;
+		int limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			req->update(1000);
+			usleep(100000);
+		}
+	}
+}
+
+	
diff --git a/indra/llcorehttp/tests/llcorehttp_test.h b/indra/llcorehttp/tests/llcorehttp_test.h
new file mode 100644
index 0000000000..a9567435ce
--- /dev/null
+++ b/indra/llcorehttp/tests/llcorehttp_test.h
@@ -0,0 +1,64 @@
+/** 
+ * @file llcorehttp_test.h
+ * @brief Main test runner
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+
+#ifndef _LLCOREHTTP_TEST_H_
+#define	_LLCOREHTTP_TEST_H_
+
+#include "linden_common.h"		// Modifies curl interfaces
+
+#include <curl/curl.h>
+#include <openssl/crypto.h>
+#include <string>
+
+#include "httprequest.h"
+
+// Initialization and cleanup for libcurl.  Mainly provides
+// a mutex callback for SSL and a thread ID hash for libcurl.
+// If you don't use these (or equivalent) and do use libcurl,
+// you'll see stalls and other anomalies when performing curl
+// operations.
+extern void init_curl();
+extern void term_curl();
+extern std::string get_base_url();
+extern void stop_thread(LLCore::HttpRequest * req);
+
+class ScopedCurlInit
+{
+public:
+	ScopedCurlInit()
+		{
+			init_curl();
+		}
+
+	~ScopedCurlInit()
+		{
+			term_curl();
+		}
+};
+	
+
+#endif	// _LLCOREHTTP_TEST_H_
diff --git a/indra/llcorehttp/tests/test_allocator.cpp b/indra/llcorehttp/tests/test_allocator.cpp
new file mode 100644
index 0000000000..ea12dc58eb
--- /dev/null
+++ b/indra/llcorehttp/tests/test_allocator.cpp
@@ -0,0 +1,184 @@
+/** 
+ * @file test_allocator.cpp
+ * @brief quick and dirty allocator for tracking memory allocations
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "test_allocator.h"
+
+#if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
+#include <libkern/OSAtomic.h>
+#elif defined(_MSC_VER)
+#include <Windows.h>
+#elif (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ ) > 40100
+// atomic extensions are built into GCC on posix platforms
+#endif
+
+#include <cassert>
+#include <cstdlib>
+#include <cstring>
+#include <vector>
+#include <iostream>
+#include <new>
+
+#include <boost/thread.hpp>
+
+
+#if	defined(WIN32)
+#define	THROW_BAD_ALLOC()	_THROW1(std::bad_alloc)
+#define	THROW_NOTHING()		_THROW0()
+#else
+#define	THROW_BAD_ALLOC()	throw(std::bad_alloc)
+#define	THROW_NOTHING()		throw()
+#endif
+
+
+struct BlockHeader
+{
+	struct Block * next;
+	std::size_t size;
+	bool in_use;
+};
+
+struct Block
+{
+	BlockHeader hdr;
+	unsigned char data[1];
+};
+
+#define TRACE_MSG(val) std::cout << __FUNCTION__ << "(" << val << ") [" << __FILE__ << ":" << __LINE__ << "]" << std::endl;
+
+static unsigned char MemBuf[ 4096 * 1024 ];
+Block * pNext = static_cast<Block *>(static_cast<void *>(MemBuf));
+volatile std::size_t MemTotal = 0;
+
+// cross-platform compare and swap operation
+static bool CAS(void * volatile * ptr, void * expected, void * new_value)
+{
+#if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
+	return OSAtomicCompareAndSwapPtr( expected, new_value, ptr );
+#elif defined(_MSC_VER)
+	return expected == InterlockedCompareExchangePointer( ptr, new_value, expected );
+#elif (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ ) > 40100
+	return __sync_bool_compare_and_swap( ptr, expected, new_value );
+#endif
+}
+
+static void * GetMem(std::size_t size)
+{
+	// TRACE_MSG(size);
+	volatile Block * pBlock = NULL;
+	volatile Block * pNewNext = NULL;
+
+	// do a lock-free update of the global next pointer
+	do
+	{
+		pBlock = pNext;
+		pNewNext = (volatile Block *)(pBlock->data + size);
+
+	} while(! CAS((void * volatile *) &pNext, (void *) pBlock, (void *) pNewNext));
+
+	// if we get here, we safely carved out a block of memory in the
+	// memory pool...
+
+	// initialize our block
+	pBlock->hdr.next = (Block *)(pBlock->data + size);
+	pBlock->hdr.size = size;
+	pBlock->hdr.in_use = true;
+	memset((void *) pBlock->data, 0, pBlock->hdr.size);
+
+	// do a lock-free update of the global memory total
+	volatile size_t total = 0;
+	volatile size_t new_total = 0;
+	do
+	{
+		total = MemTotal;
+		new_total = total + size;
+
+	} while (! CAS((void * volatile *) &MemTotal, (void *) total, (void *) new_total));
+
+	return (void *) pBlock->data;
+}
+
+
+static void FreeMem(void * p)
+{
+	// get the pointer to the block record
+	Block * pBlock = (Block *)((unsigned char *) p - sizeof(BlockHeader));
+
+	// TRACE_MSG(pBlock->hdr.size);
+	bool * cur_in_use = &(pBlock->hdr.in_use);
+	volatile bool in_use = false;
+	bool new_in_use = false;
+	do
+	{
+		in_use = pBlock->hdr.in_use;
+	} while (! CAS((void * volatile *) cur_in_use, (void *) in_use, (void *) new_in_use));
+
+	// do a lock-free update of the global memory total
+	volatile size_t total = 0;
+	volatile size_t new_total = 0;
+	do
+	{
+		total = MemTotal;
+		new_total = total - pBlock->hdr.size;
+	} while (! CAS((void * volatile *)&MemTotal, (void *) total, (void *) new_total));
+}
+
+
+std::size_t GetMemTotal()
+{
+	return MemTotal;
+}
+
+
+void * operator new(std::size_t size) THROW_BAD_ALLOC()
+{
+	return GetMem( size );
+}
+
+
+void * operator new[](std::size_t size) THROW_BAD_ALLOC()
+{
+	return GetMem( size );
+}
+
+
+void operator delete(void * p) THROW_NOTHING()
+{
+	if (p)
+	{
+		FreeMem( p );
+	}
+}
+
+
+void operator delete[](void * p) THROW_NOTHING()
+{
+	if (p)
+	{
+		FreeMem( p );
+	}
+}
+
+
diff --git a/indra/llcorehttp/tests/test_allocator.h b/indra/llcorehttp/tests/test_allocator.h
new file mode 100644
index 0000000000..3572bbc5c5
--- /dev/null
+++ b/indra/llcorehttp/tests/test_allocator.h
@@ -0,0 +1,47 @@
+/** 
+ * @file test_allocator.h
+ * @brief quick and dirty allocator for tracking memory allocations
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef TEST_ALLOCATOR_H
+#define TEST_ALLOCATOR_H
+
+#include <cstdlib>
+#include <new>
+
+size_t GetMemTotal();
+#if	defined(WIN32)
+void * operator new(std::size_t size) _THROW1(std::bad_alloc);
+void * operator new[](std::size_t size) _THROW1(std::bad_alloc);
+void operator delete(void * p) _THROW0();
+void operator delete[](void * p) _THROW0();
+#else
+void * operator new(std::size_t size) throw (std::bad_alloc);
+void * operator new[](std::size_t size) throw (std::bad_alloc);
+void operator delete(void * p) throw ();
+void operator delete[](void * p) throw ();
+#endif
+
+#endif // TEST_ALLOCATOR_H
+
diff --git a/indra/llcorehttp/tests/test_bufferarray.hpp b/indra/llcorehttp/tests/test_bufferarray.hpp
new file mode 100644
index 0000000000..8a2a64d970
--- /dev/null
+++ b/indra/llcorehttp/tests/test_bufferarray.hpp
@@ -0,0 +1,432 @@
+/** 
+ * @file test_bufferarray.hpp
+ * @brief unit tests for the LLCore::BufferArray class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef TEST_LLCORE_BUFFER_ARRAY_H_
+#define TEST_LLCORE_BUFFER_ARRAY_H_
+
+#include "bufferarray.h"
+
+#include <iostream>
+
+#include "test_allocator.h"
+
+
+using namespace LLCore;
+
+
+
+namespace tut
+{
+
+struct BufferArrayTestData
+{
+	// the test objects inherit from this so the member functions and variables
+	// can be referenced directly inside of the test functions.
+	size_t mMemTotal;
+};
+
+typedef test_group<BufferArrayTestData> BufferArrayTestGroupType;
+typedef BufferArrayTestGroupType::object BufferArrayTestObjectType;
+BufferArrayTestGroupType BufferArrayTestGroup("BufferArray Tests");
+
+template <> template <>
+void BufferArrayTestObjectType::test<1>()
+{
+	set_test_name("BufferArray construction");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+	ensure("One ref on construction of BufferArray", ba->getRefCount() == 1);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+	ensure("Nothing in BA", 0 == ba->size());
+
+	// Try to read
+	char buffer[20];
+	size_t read_len(ba->read(0, buffer, sizeof(buffer)));
+	ensure("Read returns empty", 0 == read_len);
+	
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void BufferArrayTestObjectType::test<2>()
+{
+	set_test_name("BufferArray single write");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+
+	// write some data to the buffer
+	char str1[] = "abcdefghij";
+ 	char buffer[256];
+	
+	size_t len = ba->write(0, str1, strlen(str1));
+	ensure("Wrote length correct", strlen(str1) == len);
+	ensure("Recorded size correct", strlen(str1) == ba->size());
+
+	// read some data back
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(2, buffer, 2);
+	ensure("Read length correct", 2 == len);
+	ensure("Read content correct", 'c' == buffer[0] && 'd' == buffer[1]);
+	ensure("Read didn't overwrite", 'X' == buffer[2]);
+	
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+
+template <> template <>
+void BufferArrayTestObjectType::test<3>()
+{
+	set_test_name("BufferArray multiple writes");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+
+	// write some data to the buffer
+	char str1[] = "abcdefghij";
+	size_t str1_len(strlen(str1));
+ 	char buffer[256];
+	
+	size_t len = ba->write(0, str1, str1_len);
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", str1_len == ba->size());
+
+	// again...
+	len = ba->write(str1_len, str1, strlen(str1));
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", (2 * str1_len) == ba->size());
+
+	// read some data back
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(8, buffer, 4);
+	ensure("Read length correct", 4 == len);
+	ensure("Read content correct", 'i' == buffer[0] && 'j' == buffer[1]);
+	ensure("Read content correct", 'a' == buffer[2] && 'b' == buffer[3]);
+	ensure("Read didn't overwrite", 'X' == buffer[4]);
+
+	// Read whole thing
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(0, buffer, sizeof(buffer));
+	ensure("Read length correct", (2 * str1_len) == len);
+	ensure("Read content correct (3)", 0 == strncmp(buffer, str1, str1_len));
+	ensure("Read content correct (4)", 0 == strncmp(&buffer[str1_len], str1, str1_len));
+	ensure("Read didn't overwrite (5)", 'X' == buffer[2 * str1_len]);
+	
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void BufferArrayTestObjectType::test<4>()
+{
+	set_test_name("BufferArray overwriting");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+
+	// write some data to the buffer
+	char str1[] = "abcdefghij";
+	size_t str1_len(strlen(str1));
+	char str2[] = "ABCDEFGHIJ";
+ 	char buffer[256];
+	
+	size_t len = ba->write(0, str1, str1_len);
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", str1_len == ba->size());
+
+	// again...
+	len = ba->write(str1_len, str1, strlen(str1));
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", (2 * str1_len) == ba->size());
+
+	// reposition and overwrite
+	len = ba->write(8, str2, 4);
+	ensure("Overwrite length correct", 4 == len);
+
+	// Leave position and read verifying content (stale really from seek() days)
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(12, buffer, 4);
+	ensure("Read length correct", 4 == len);
+	ensure("Read content correct", 'c' == buffer[0] && 'd' == buffer[1]);
+	ensure("Read content correct.2", 'e' == buffer[2] && 'f' == buffer[3]);
+	ensure("Read didn't overwrite", 'X' == buffer[4]);
+
+	// reposition and check
+	len = ba->read(6, buffer, 8);
+	ensure("Read length correct.2", 8 == len);
+	ensure("Read content correct.3", 'g' == buffer[0] && 'h' == buffer[1]);
+	ensure("Read content correct.4", 'A' == buffer[2] && 'B' == buffer[3]);
+	ensure("Read content correct.5", 'C' == buffer[4] && 'D' == buffer[5]);
+	ensure("Read content correct.6", 'c' == buffer[6] && 'd' == buffer[7]);
+	ensure("Read didn't overwrite.7", 'X' == buffer[8]);
+
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void BufferArrayTestObjectType::test<5>()
+{
+	set_test_name("BufferArray multiple writes - sequential reads");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+
+	// write some data to the buffer
+	char str1[] = "abcdefghij";
+	size_t str1_len(strlen(str1));
+ 	char buffer[256];
+	
+	size_t len = ba->write(0, str1, str1_len);
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", str1_len == ba->size());
+
+	// again...
+	len = ba->write(str1_len, str1, str1_len);
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", (2 * str1_len) == ba->size());
+
+	// read some data back
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(8, buffer, 4);
+	ensure("Read length correct", 4 == len);
+	ensure("Read content correct", 'i' == buffer[0] && 'j' == buffer[1]);
+	ensure("Read content correct.2", 'a' == buffer[2] && 'b' == buffer[3]);
+	ensure("Read didn't overwrite", 'X' == buffer[4]);
+
+	// Read some more without repositioning
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(12, buffer, sizeof(buffer));
+	ensure("Read length correct", (str1_len - 2) == len);
+	ensure("Read content correct.3", 0 == strncmp(buffer, str1+2, str1_len-2));
+	ensure("Read didn't overwrite.2", 'X' == buffer[str1_len-1]);
+	
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void BufferArrayTestObjectType::test<6>()
+{
+	set_test_name("BufferArray overwrite spanning blocks and appending");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+
+	// write some data to the buffer
+	char str1[] = "abcdefghij";
+	size_t str1_len(strlen(str1));
+	char str2[] = "ABCDEFGHIJKLMNOPQRST";
+	size_t str2_len(strlen(str2));
+ 	char buffer[256];
+	
+	size_t len = ba->write(0, str1, str1_len);
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", str1_len == ba->size());
+
+	// again...
+	len = ba->write(str1_len, str1, strlen(str1));
+	ensure("Wrote length correct", str1_len == len);
+	ensure("Recorded size correct", (2 * str1_len) == ba->size());
+
+	// reposition and overwrite
+	len = ba->write(8, str2, str2_len);
+	ensure("Overwrite length correct", str2_len == len);
+
+	// Leave position and read verifying content
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(8 + str2_len, buffer, 0);
+	ensure("Read length correct", 0 == len);
+	ensure("Read didn't overwrite", 'X' == buffer[0]);
+
+	// reposition and check
+	len = ba->read(0, buffer, sizeof(buffer));
+	ensure("Read length correct.2", (str1_len + str2_len - 2) == len);
+	ensure("Read content correct", 0 == strncmp(buffer, str1, str1_len-2));
+	ensure("Read content correct.2", 0 == strncmp(buffer+str1_len-2, str2, str2_len));
+	ensure("Read didn't overwrite.2", 'X' == buffer[str1_len + str2_len - 2]);
+
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure("All memory released", mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void BufferArrayTestObjectType::test<7>()
+{
+	set_test_name("BufferArray overwrite spanning blocks and sequential writes");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+
+	// write some data to the buffer
+	char str1[] = "abcdefghij";
+	size_t str1_len(strlen(str1));
+	char str2[] = "ABCDEFGHIJKLMNOPQRST";
+	size_t str2_len(strlen(str2));
+ 	char buffer[256];
+
+	// 2x str1
+	size_t len = ba->write(0, str1, str1_len);
+	len = ba->write(str1_len, str1, str1_len);
+
+	// reposition and overwrite
+	len = ba->write(6, str2, 2);
+	ensure("Overwrite length correct", 2 == len);
+
+	len = ba->write(8, str2, 2);
+	ensure("Overwrite length correct.2", 2 == len);
+
+	len = ba->write(10, str2, 2);
+	ensure("Overwrite length correct.3", 2 == len);
+
+	// append some data
+	len = ba->append(str2, str2_len);
+	ensure("Append length correct", str2_len == len);
+
+	// append some more
+	void * out_buf(ba->appendBufferAlloc(str1_len));
+	memcpy(out_buf, str1, str1_len);
+
+	// And some final writes
+	len = ba->write(3 * str1_len + str2_len, str2, 2);
+	ensure("Write length correct.2", 2 == len);
+	
+	// Check contents
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(0, buffer, sizeof(buffer));
+	ensure("Final buffer length correct", (3 * str1_len + str2_len + 2) == len);
+	ensure("Read content correct", 0 == strncmp(buffer, str1, 6));
+	ensure("Read content correct.2", 0 == strncmp(buffer + 6, str2, 2));
+	ensure("Read content correct.3", 0 == strncmp(buffer + 8, str2, 2));
+	ensure("Read content correct.4", 0 == strncmp(buffer + 10, str2, 2));
+	ensure("Read content correct.5", 0 == strncmp(buffer + str1_len + 2, str1 + 2, str1_len - 2));
+	ensure("Read content correct.6", 0 == strncmp(buffer + str1_len + str1_len, str2, str2_len));
+	ensure("Read content correct.7", 0 == strncmp(buffer + str1_len + str1_len + str2_len, str1, str1_len));
+	ensure("Read content correct.8", 0 == strncmp(buffer + str1_len + str1_len + str2_len + str1_len, str2, 2));
+	ensure("Read didn't overwrite", 'X' == buffer[str1_len + str1_len + str2_len + str1_len + 2]);
+	
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure("All memory released", mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void BufferArrayTestObjectType::test<8>()
+{
+	set_test_name("BufferArray zero-length appendBufferAlloc");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArray * ba = new BufferArray();
+
+	// write some data to the buffer
+	char str1[] = "abcdefghij";
+	size_t str1_len(strlen(str1));
+	char str2[] = "ABCDEFGHIJKLMNOPQRST";
+	size_t str2_len(strlen(str2));
+ 	char buffer[256];
+
+	// 2x str1
+	size_t len = ba->write(0, str1, str1_len);
+	len = ba->write(str1_len, str1, str1_len);
+
+	// zero-length allocate (we allow this with a valid pointer returned)
+	void * out_buf(ba->appendBufferAlloc(0));
+	ensure("Buffer from zero-length appendBufferAlloc non-NULL", NULL != out_buf);
+
+	// Do it again
+	void * out_buf2(ba->appendBufferAlloc(0));
+	ensure("Buffer from zero-length appendBufferAlloc non-NULL.2", NULL != out_buf2);
+	ensure("Two zero-length appendBufferAlloc buffers distinct", out_buf != out_buf2);
+
+	// And some final writes
+	len = ba->write(2 * str1_len, str2, str2_len);
+	
+	// Check contents
+	memset(buffer, 'X', sizeof(buffer));
+	len = ba->read(0, buffer, sizeof(buffer));
+	ensure("Final buffer length correct", (2 * str1_len + str2_len) == len);
+	ensure("Read content correct.1", 0 == strncmp(buffer, str1, str1_len));
+	ensure("Read content correct.2", 0 == strncmp(buffer + str1_len, str1, str1_len));
+	ensure("Read content correct.3", 0 == strncmp(buffer + str1_len + str1_len, str2, str2_len));
+	ensure("Read didn't overwrite", 'X' == buffer[str1_len + str1_len + str2_len]);
+	
+	// release the implicit reference, causing the object to be released
+	ba->release();
+
+	// make sure we didn't leak any memory
+	ensure("All memory released", mMemTotal == GetMemTotal());
+}
+
+}  // end namespace tut
+
+
+#endif  // TEST_LLCORE_BUFFER_ARRAY_H_
diff --git a/indra/llcorehttp/tests/test_bufferstream.hpp b/indra/llcorehttp/tests/test_bufferstream.hpp
new file mode 100644
index 0000000000..831c901b9d
--- /dev/null
+++ b/indra/llcorehttp/tests/test_bufferstream.hpp
@@ -0,0 +1,304 @@
+/** 
+ * @file test_bufferstream.hpp
+ * @brief unit tests for the LLCore::BufferArrayStreamBuf/BufferArrayStream classes
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef TEST_LLCORE_BUFFER_STREAM_H_
+#define TEST_LLCORE_BUFFER_STREAM_H_
+
+#include "bufferstream.h"
+
+#include <iostream>
+
+#include "test_allocator.h"
+#include "llsd.h"
+#include "llsdserialize.h"
+
+
+using namespace LLCore;
+
+
+namespace tut
+{
+
+struct BufferStreamTestData
+{
+	// the test objects inherit from this so the member functions and variables
+	// can be referenced directly inside of the test functions.
+	size_t mMemTotal;
+};
+
+typedef test_group<BufferStreamTestData> BufferStreamTestGroupType;
+typedef BufferStreamTestGroupType::object BufferStreamTestObjectType;
+BufferStreamTestGroupType BufferStreamTestGroup("BufferStream Tests");
+typedef BufferArrayStreamBuf::traits_type tst_traits_t;
+
+
+template <> template <>
+void BufferStreamTestObjectType::test<1>()
+{
+	set_test_name("BufferArrayStreamBuf construction with NULL BufferArray");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArrayStreamBuf * bsb = new BufferArrayStreamBuf(NULL);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+
+	// Not much will work with a NULL
+	ensure("underflow() on NULL fails", tst_traits_t::eof() == bsb->underflow());
+	ensure("uflow() on NULL fails", tst_traits_t::eof() == bsb->uflow());
+	ensure("pbackfail() on NULL fails", tst_traits_t::eof() == bsb->pbackfail('c'));
+	ensure("showmanyc() on NULL fails", bsb->showmanyc() == -1);
+	ensure("overflow() on NULL fails", tst_traits_t::eof() == bsb->overflow('c'));
+	ensure("xsputn() on NULL fails", bsb->xsputn("blah", 4) == 0);
+	ensure("seekoff() on NULL fails", bsb->seekoff(0, std::ios_base::beg, std::ios_base::in) == std::streampos(-1));
+	
+	// release the implicit reference, causing the object to be released
+	delete bsb;
+	bsb = NULL;
+
+	// make sure we didn't leak any memory
+	ensure("Allocated memory returned", mMemTotal == GetMemTotal());
+}
+
+
+template <> template <>
+void BufferStreamTestObjectType::test<2>()
+{
+	set_test_name("BufferArrayStream construction with NULL BufferArray");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	BufferArrayStream * bas = new BufferArrayStream(NULL);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+
+	// Not much will work with a NULL here
+	ensure("eof() is false on NULL", ! bas->eof());
+	ensure("fail() is false on NULL", ! bas->fail());
+	ensure("good() on NULL", bas->good());
+		   
+	// release the implicit reference, causing the object to be released
+	delete bas;
+	bas = NULL;
+
+	// make sure we didn't leak any memory
+	ensure("Allocated memory returned", mMemTotal == GetMemTotal());
+}
+
+
+template <> template <>
+void BufferStreamTestObjectType::test<3>()
+{
+	set_test_name("BufferArrayStreamBuf construction with empty BufferArray");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted BufferArray with implicit reference
+	BufferArray * ba = new BufferArray;
+	BufferArrayStreamBuf * bsb = new BufferArrayStreamBuf(ba);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+
+	// I can release my ref on the BA
+	ba->release();
+	ba = NULL;
+	
+	// release the implicit reference, causing the object to be released
+	delete bsb;
+	bsb = NULL;
+
+	// make sure we didn't leak any memory
+	ensure("Allocated memory returned", mMemTotal == GetMemTotal());
+}
+
+
+template <> template <>
+void BufferStreamTestObjectType::test<4>()
+{
+	set_test_name("BufferArrayStream construction with empty BufferArray");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted BufferArray with implicit reference
+	BufferArray * ba = new BufferArray;
+
+	{
+		// create a new ref counted object with an implicit reference
+		BufferArrayStream bas(ba);
+		ensure("Memory being used", mMemTotal < GetMemTotal());
+	}
+
+	// release the implicit reference, causing the object to be released
+	ba->release();
+	ba = NULL;
+	
+	// make sure we didn't leak any memory
+	ensure("Allocated memory returned", mMemTotal == GetMemTotal());
+}
+
+
+template <> template <>
+void BufferStreamTestObjectType::test<5>()
+{
+	set_test_name("BufferArrayStreamBuf construction with real BufferArray");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted BufferArray with implicit reference
+	BufferArray * ba = new BufferArray;
+	const char * content("This is a string.  A fragment.");
+	const size_t c_len(strlen(content));
+	ba->append(content, c_len);
+
+	// Creat an adapter for the BufferArray
+	BufferArrayStreamBuf * bsb = new BufferArrayStreamBuf(ba);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+
+	// I can release my ref on the BA
+	ba->release();
+	ba = NULL;
+	
+	// Various static state
+	ensure("underflow() returns 'T'", bsb->underflow() == 'T');
+	ensure("underflow() returns 'T' again", bsb->underflow() == 'T');
+	ensure("uflow() returns 'T'", bsb->uflow() == 'T');
+	ensure("uflow() returns 'h'", bsb->uflow() == 'h');
+	ensure("pbackfail('i') fails", tst_traits_t::eof() == bsb->pbackfail('i'));
+	ensure("pbackfail('T') fails", tst_traits_t::eof() == bsb->pbackfail('T'));
+	ensure("pbackfail('h') succeeds", bsb->pbackfail('h') == 'h');
+	ensure("showmanyc() is everything but the 'T'", bsb->showmanyc() == (c_len - 1));
+	ensure("overflow() appends", bsb->overflow('c') == 'c');
+	ensure("showmanyc() reflects append", bsb->showmanyc() == (c_len - 1 + 1));
+	ensure("xsputn() appends some more", bsb->xsputn("bla!", 4) == 4);
+	ensure("showmanyc() reflects 2nd append", bsb->showmanyc() == (c_len - 1 + 5));
+	ensure("seekoff() succeeds", bsb->seekoff(0, std::ios_base::beg, std::ios_base::in) == std::streampos(0));
+	ensure("seekoff() succeeds 2", bsb->seekoff(4, std::ios_base::cur, std::ios_base::in) == std::streampos(4));
+	ensure("showmanyc() picks up seekoff", bsb->showmanyc() == (c_len + 5 - 4));
+	ensure("seekoff() succeeds 3", bsb->seekoff(0, std::ios_base::end, std::ios_base::in) == std::streampos(c_len + 4));
+	ensure("pbackfail('!') succeeds", tst_traits_t::eof() == bsb->pbackfail('!'));
+	
+	// release the implicit reference, causing the object to be released
+	delete bsb;
+	bsb = NULL;
+
+	// make sure we didn't leak any memory
+	ensure("Allocated memory returned", mMemTotal == GetMemTotal());
+}
+
+
+template <> template <>
+void BufferStreamTestObjectType::test<6>()
+{
+	set_test_name("BufferArrayStream construction with real BufferArray");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted BufferArray with implicit reference
+	BufferArray * ba = new BufferArray;
+	//const char * content("This is a string.  A fragment.");
+	//const size_t c_len(strlen(content));
+	//ba->append(content, strlen(content));
+
+	{
+		// Creat an adapter for the BufferArray
+		BufferArrayStream bas(ba);
+		ensure("Memory being used", mMemTotal < GetMemTotal());
+
+		// Basic operations
+		bas << "Hello" << 27 << ".";
+		ensure("BA length 8", ba->size() == 8);
+
+		std::string str;
+		bas >> str;
+		ensure("reads correctly", str == "Hello27.");
+	}
+
+	// release the implicit reference, causing the object to be released
+	ba->release();
+	ba = NULL;
+
+	// make sure we didn't leak any memory
+	// ensure("Allocated memory returned", mMemTotal == GetMemTotal());
+	// static U64 mem = GetMemTotal();
+}
+
+
+template <> template <>
+void BufferStreamTestObjectType::test<7>()
+{
+	set_test_name("BufferArrayStream with LLSD serialization");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted BufferArray with implicit reference
+	BufferArray * ba = new BufferArray;
+
+	{
+		// Creat an adapter for the BufferArray
+		BufferArrayStream bas(ba);
+		ensure("Memory being used", mMemTotal < GetMemTotal());
+
+		// LLSD
+		LLSD llsd = LLSD::emptyMap();
+
+		llsd["int"] = LLSD::Integer(3);
+		llsd["float"] = LLSD::Real(923289.28992);
+		llsd["string"] = LLSD::String("aksjdl;ajsdgfjgfal;sdgjakl;sdfjkl;ajsdfkl;ajsdfkl;jaskl;dfj");
+
+		LLSD llsd_map = LLSD::emptyMap();
+		llsd_map["int"] = LLSD::Integer(-2889);
+		llsd_map["float"] = LLSD::Real(2.37829e32);
+		llsd_map["string"] = LLSD::String("OHIGODHSPDGHOSDHGOPSHDGP");
+
+		llsd["map"] = llsd_map;
+		
+		// Serialize it
+		LLSDSerialize::toXML(llsd, bas);
+
+		std::string str;
+		bas >> str;
+		// std::cout << "SERIALIZED LLSD:  " << str << std::endl;
+		ensure("Extracted string has reasonable length", str.size() > 60);
+	}
+
+	// release the implicit reference, causing the object to be released
+	ba->release();
+	ba = NULL;
+
+	// make sure we didn't leak any memory
+	// ensure("Allocated memory returned", mMemTotal == GetMemTotal());
+}
+
+
+}  // end namespace tut
+
+
+#endif  // TEST_LLCORE_BUFFER_STREAM_H_
diff --git a/indra/llcorehttp/tests/test_httpheaders.hpp b/indra/llcorehttp/tests/test_httpheaders.hpp
new file mode 100644
index 0000000000..ce0d19b058
--- /dev/null
+++ b/indra/llcorehttp/tests/test_httpheaders.hpp
@@ -0,0 +1,108 @@
+/** 
+ * @file test_httpheaders.hpp
+ * @brief unit tests for the LLCore::HttpHeaders class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef TEST_LLCORE_HTTP_HEADERS_H_
+#define TEST_LLCORE_HTTP_HEADERS_H_
+
+#include "httpheaders.h"
+
+#include <iostream>
+
+#include "test_allocator.h"
+
+
+using namespace LLCoreInt;
+
+
+
+namespace tut
+{
+
+struct HttpHeadersTestData
+{
+	// the test objects inherit from this so the member functions and variables
+	// can be referenced directly inside of the test functions.
+	size_t mMemTotal;
+};
+
+typedef test_group<HttpHeadersTestData> HttpHeadersTestGroupType;
+typedef HttpHeadersTestGroupType::object HttpHeadersTestObjectType;
+HttpHeadersTestGroupType HttpHeadersTestGroup("HttpHeaders Tests");
+
+template <> template <>
+void HttpHeadersTestObjectType::test<1>()
+{
+	set_test_name("HttpHeaders construction");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	HttpHeaders * headers = new HttpHeaders();
+	ensure("One ref on construction of HttpHeaders", headers->getRefCount() == 1);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+	ensure("Nothing in headers", 0 == headers->mHeaders.size());
+
+	// release the implicit reference, causing the object to be released
+	headers->release();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void HttpHeadersTestObjectType::test<2>()
+{
+	set_test_name("HttpHeaders construction");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	HttpHeaders * headers = new HttpHeaders();
+	
+	{
+		// Append a few strings
+		std::string str1("Pragma:");
+		headers->mHeaders.push_back(str1);
+		std::string str2("Accept: application/json");
+		headers->mHeaders.push_back(str2);
+	
+		ensure("Headers retained", 2 == headers->mHeaders.size());
+		ensure("First is first", headers->mHeaders[0] == str1);
+		ensure("Second is second", headers->mHeaders[1] == str2);
+	}
+	
+	// release the implicit reference, causing the object to be released
+	headers->release();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+}  // end namespace tut
+
+
+#endif  // TEST_LLCORE_HTTP_HEADERS_H_
diff --git a/indra/llcorehttp/tests/test_httpoperation.hpp b/indra/llcorehttp/tests/test_httpoperation.hpp
new file mode 100644
index 0000000000..17b1a96878
--- /dev/null
+++ b/indra/llcorehttp/tests/test_httpoperation.hpp
@@ -0,0 +1,125 @@
+/** 
+ * @file test_httpoperation.hpp
+ * @brief unit tests for the LLCore::HttpOperation-derived classes
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef TEST_LLCORE_HTTP_OPERATION_H_
+#define TEST_LLCORE_HTTP_OPERATION_H_
+
+#include "_httpoperation.h"
+#include "httphandler.h"
+
+#include <iostream>
+
+#include "test_allocator.h"
+
+
+using namespace LLCoreInt;
+
+
+namespace
+{
+
+class TestHandler : public LLCore::HttpHandler
+{
+public:
+	virtual void onCompleted(HttpHandle, HttpResponse *)
+		{
+			std::cout << "TestHandler::onCompleted() invoked" << std::endl;
+		}
+	
+};
+
+
+}  // end namespace anonymous
+
+
+namespace tut
+{
+	struct HttpOperationTestData
+	{
+		// the test objects inherit from this so the member functions and variables
+		// can be referenced directly inside of the test functions.
+		size_t mMemTotal;
+	};
+
+	typedef test_group<HttpOperationTestData> HttpOperationTestGroupType;
+	typedef HttpOperationTestGroupType::object HttpOperationTestObjectType;
+	HttpOperationTestGroupType HttpOperationTestGroup("HttpOperation Tests");
+
+	template <> template <>
+	void HttpOperationTestObjectType::test<1>()
+	{
+		set_test_name("HttpOpNull construction");
+
+		// record the total amount of dynamically allocated memory
+		mMemTotal = GetMemTotal();
+
+		// create a new ref counted object with an implicit reference
+		HttpOpNull * op = new HttpOpNull();
+		ensure(op->getRefCount() == 1);
+		ensure(mMemTotal < GetMemTotal());
+		
+		// release the implicit reference, causing the object to be released
+		op->release();
+
+		// make sure we didn't leak any memory
+		ensure(mMemTotal == GetMemTotal());
+	}
+
+	template <> template <>
+	void HttpOperationTestObjectType::test<2>()
+	{
+		set_test_name("HttpOpNull construction with handlers");
+
+		// record the total amount of dynamically allocated memory
+		mMemTotal = GetMemTotal();
+
+		// Get some handlers
+		TestHandler * h1 = new TestHandler();
+		
+		// create a new ref counted object with an implicit reference
+		HttpOpNull * op = new HttpOpNull();
+
+		// Add the handlers
+		op->setReplyPath(NULL, h1);
+
+		// Check ref count
+		ensure(op->getRefCount() == 1);
+
+		// release the reference, releasing the operation but
+		// not the handlers.
+		op->release();
+		op = NULL;
+		ensure(mMemTotal != GetMemTotal());
+		
+		// release the handlers
+		delete h1;
+		h1 = NULL;
+
+		ensure(mMemTotal == GetMemTotal());
+	}
+
+}
+
+#endif  // TEST_LLCORE_HTTP_OPERATION_H_
diff --git a/indra/llcorehttp/tests/test_httprequest.hpp b/indra/llcorehttp/tests/test_httprequest.hpp
new file mode 100644
index 0000000000..e5488cf941
--- /dev/null
+++ b/indra/llcorehttp/tests/test_httprequest.hpp
@@ -0,0 +1,2670 @@
+/** 
+ * @file test_httprequest.hpp
+ * @brief unit tests for the LLCore::HttpRequest class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef TEST_LLCORE_HTTP_REQUEST_H_
+#define TEST_LLCORE_HTTP_REQUEST_H_
+
+#include "httprequest.h"
+#include "bufferarray.h"
+#include "httphandler.h"
+#include "httpheaders.h"
+#include "httpresponse.h"
+#include "httpoptions.h"
+#include "_httpservice.h"
+#include "_httprequestqueue.h"
+
+#include <curl/curl.h>
+#include <boost/regex.hpp>
+#include <sstream>
+
+#include "test_allocator.h"
+#include "llcorehttp_test.h"
+
+
+using namespace LLCoreInt;
+
+
+namespace
+{
+
+#if defined(WIN32)
+
+void usleep(unsigned long usec);
+
+#endif
+
+}
+
+namespace tut
+{
+
+struct HttpRequestTestData
+{
+	// the test objects inherit from this so the member functions and variables
+	// can be referenced directly inside of the test functions.
+	size_t			mMemTotal;
+	int				mHandlerCalls;
+	HttpStatus		mStatus;
+};
+
+class TestHandler2 : public LLCore::HttpHandler
+{
+public:
+	TestHandler2(HttpRequestTestData * state,
+				 const std::string & name)
+		: mState(state),
+		  mName(name),
+		  mExpectHandle(LLCORE_HTTP_HANDLE_INVALID)
+		{}
+	
+	virtual void onCompleted(HttpHandle handle, HttpResponse * response)
+		{
+			if (LLCORE_HTTP_HANDLE_INVALID != mExpectHandle)
+			{
+				ensure("Expected handle received in handler", mExpectHandle == handle);
+			}
+			ensure("Handler got a response", NULL != response);
+			if (response && mState)
+			{
+				const HttpStatus actual_status(response->getStatus());
+				std::ostringstream test;
+				test << "Expected HttpStatus received in response.  Wanted:  "
+					 << mState->mStatus.toHex() << " Received:  " << actual_status.toHex();
+				ensure(test.str().c_str(), actual_status == mState->mStatus);
+			}
+			if (mState)
+			{
+				mState->mHandlerCalls++;
+			}
+			if (! mHeadersRequired.empty() || ! mHeadersDisallowed.empty())
+			{
+				ensure("Response required with header check", response != NULL);
+				HttpHeaders * header(response->getHeaders());	// Will not hold onto this
+				ensure("Some quantity of headers returned", header != NULL);
+
+				if (! mHeadersRequired.empty())
+				{
+					for (int i(0); i < mHeadersRequired.size(); ++i)
+					{
+						bool found = false;
+						for (HttpHeaders::container_t::const_iterator iter(header->mHeaders.begin());
+							 header->mHeaders.end() != iter;
+							 ++iter)
+						{
+							if (boost::regex_match(*iter, mHeadersRequired[i]))
+							{
+								found = true;
+								break;
+							}
+						}
+						std::ostringstream str;
+						str << "Required header # " << i << " found in response";
+						ensure(str.str(), found);
+					}
+				}
+
+				if (! mHeadersDisallowed.empty())
+				{
+					for (int i(0); i < mHeadersDisallowed.size(); ++i)
+					{
+						for (HttpHeaders::container_t::const_iterator iter(header->mHeaders.begin());
+							 header->mHeaders.end() != iter;
+							 ++iter)
+						{
+							if (boost::regex_match(*iter, mHeadersDisallowed[i]))
+							{
+								std::ostringstream str;
+								str << "Disallowed header # " << i << " not found in response";
+								ensure(str.str(), false);
+							}
+						}
+					}
+				}
+			}
+			
+			if (! mCheckContentType.empty())
+			{
+				ensure("Response required with content type check", response != NULL);
+				std::string con_type(response->getContentType());
+				ensure("Content-Type as expected (" + mCheckContentType + ")",
+					   mCheckContentType == con_type);
+			}
+
+			// std::cout << "TestHandler2::onCompleted() invoked" << std::endl;
+		}
+
+	HttpRequestTestData * mState;
+	std::string mName;
+	HttpHandle mExpectHandle;
+	std::string mCheckContentType;
+	std::vector<boost::regex> mHeadersRequired;
+	std::vector<boost::regex> mHeadersDisallowed;
+};
+
+typedef test_group<HttpRequestTestData> HttpRequestTestGroupType;
+typedef HttpRequestTestGroupType::object HttpRequestTestObjectType;
+HttpRequestTestGroupType HttpRequestTestGroup("HttpRequest Tests");
+
+template <> template <>
+void HttpRequestTestObjectType::test<1>()
+{
+	ScopedCurlInit ready;
+	
+	set_test_name("HttpRequest construction");
+
+	HttpRequest * req = NULL;
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory being used", mMemTotal < GetMemTotal());
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		HttpRequest::destroyService();
+
+		// make sure we didn't leak any memory
+		ensure("Memory returned", mMemTotal == GetMemTotal());
+	}
+	catch (...)
+	{
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+template <> template <>
+void HttpRequestTestObjectType::test<2>()
+{
+	ScopedCurlInit ready;
+
+	set_test_name("HttpRequest and Null Op queued");
+
+	HttpRequest * req = NULL;
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory being used", mMemTotal < GetMemTotal());
+
+		// Issue a NoOp
+		HttpHandle handle = req->requestNoOp(NULL);
+		ensure("Request issued", handle != LLCORE_HTTP_HANDLE_INVALID);
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// We're still holding onto the operation which is
+		// sitting, unserviced, on the request queue so...
+		ensure("Memory being used 2", mMemTotal < GetMemTotal());
+
+		// Request queue should have two references:  global singleton & service object
+		ensure("Two references to request queue", 2 == HttpRequestQueue::instanceOf()->getRefCount());
+
+		// Okay, tear it down
+		HttpRequest::destroyService();
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory returned", mMemTotal == GetMemTotal());
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<3>()
+{
+	ScopedCurlInit ready;
+	
+	set_test_name("HttpRequest NoOp + Stop execution");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	
+	try
+	{
+		
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a NoOp
+		HttpHandle handle = req->requestNoOp(&handler);
+		ensure("Valid handle returned for first request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(20);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 100;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+template <> template <>
+void HttpRequestTestObjectType::test<4>()
+{
+	ScopedCurlInit ready;
+
+	set_test_name("2 HttpRequest instances, one thread");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	TestHandler2 handler1(this, "handler1");
+	TestHandler2 handler2(this, "handler2");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req1 = NULL;
+	HttpRequest * req2 = NULL;
+	
+	try
+	{
+		
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req1 = new HttpRequest();
+		req2 = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue some NoOps
+		HttpHandle handle = req1->requestNoOp(&handler1);
+		ensure("Valid handle returned for first request", handle != LLCORE_HTTP_HANDLE_INVALID);
+		handler1.mExpectHandle = handle;
+
+		handle = req2->requestNoOp(&handler2);
+		ensure("Valid handle returned for first request", handle != LLCORE_HTTP_HANDLE_INVALID);
+		handler2.mExpectHandle = handle;
+
+		// Run the notification pump.
+		int count(0);
+		int limit(20);
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req1->update(1000000);
+			req2->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 2);
+
+		// Okay, request a shutdown of the servicing thread
+		handle = req2->requestStopThread(&handler2);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+		handler2.mExpectHandle = handle;
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 100;
+		while (count++ < limit && mHandlerCalls < 3)
+		{
+			req1->update(1000000);
+			req2->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 3);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release the request object
+		delete req1;
+		req1 = NULL;
+		delete req2;
+		req2 = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 3 == mHandlerCalls);
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+	}
+	catch (...)
+	{
+		stop_thread(req1);
+		delete req1;
+		delete req2;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+template <> template <>
+void HttpRequestTestObjectType::test<5>()
+{
+	ScopedCurlInit ready;
+	
+	set_test_name("HttpRequest Spin (soft) + NoOp + hard termination");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	
+	try
+	{
+		
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a Spin
+		HttpHandle handle = req->requestSpin(1);
+		ensure("Valid handle returned for spin request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Issue a NoOp
+		handle = req->requestNoOp(&handler);
+		ensure("Valid handle returned for no-op request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("NoOp notification received", mHandlerCalls == 1);
+
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+
+		// Check memory usage
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+		// This memory test should work but could give problems as it
+		// relies on the worker thread picking up a friendly request
+		// to shutdown.  Doing so, it drops references to things and
+		// we should go back to where we started.  If it gives you
+		// problems, look into the code before commenting things out.
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<6>()
+{
+	ScopedCurlInit ready;
+	
+	set_test_name("HttpRequest Spin + NoOp + hard termination");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	
+	try
+	{
+		
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a Spin
+		HttpHandle handle = req->requestSpin(0);		// Hard spin
+		ensure("Valid handle returned for spin request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Issue a NoOp
+		handle = req->requestNoOp(&handler);
+		ensure("Valid handle returned for no-op request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("No notifications received", mHandlerCalls == 0);
+
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+
+		// Check memory usage
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		// ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+		// This memory test won't work because we're killing the thread
+		// hard with the hard spinner.  There's no opportunity to join
+		// nicely so many things leak or get destroyed unilaterally.
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<7>()
+{
+	ScopedCurlInit ready;
+
+	set_test_name("HttpRequest GET to dead port + Stop execution");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * opts = NULL;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		opts = new HttpOptions();
+		opts->setRetries(1);			// Don't try for too long - default retries take about 18S
+		
+		// Issue a GET that can't connect
+		mStatus = HttpStatus(HttpStatus::EXT_CURL_EASY, CURLE_COULDNT_CONNECT);
+		HttpHandle handle = req->requestGetByteRange(HttpRequest::DEFAULT_POLICY_ID,
+													 0U,
+													 "http://127.0.0.1:2/nothing/here",
+													 0,
+													 0,
+													 opts,
+													 NULL,
+													 &handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(50);				// With one retry, should fail quickish
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 100;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+
+		// release options
+		opts->release();
+		opts = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if 0 // defined(WIN32)
+		// Can't do this on any platform anymore, the LL logging system holds
+		// on to memory and produces what looks like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (opts)
+		{
+			opts->release();
+			opts = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<8>()
+{
+	ScopedCurlInit ready;
+
+	std::string url_base(get_base_url());
+	// std::cerr << "Base:  "  << url_base << std::endl;
+	
+	set_test_name("HttpRequest GET to real service");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a GET that *can* connect
+		mStatus = HttpStatus(200);
+		HttpHandle handle = req->requestGet(HttpRequest::DEFAULT_POLICY_ID,
+											0U,
+											url_base,
+											NULL,
+											NULL,
+											&handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if defined(WIN32)
+		// Can only do this memory test on Windows.  On other platforms,
+		// the LL logging system holds on to memory and produces what looks
+		// like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<9>()
+{
+	ScopedCurlInit ready;
+
+	std::string url_base(get_base_url());
+	// std::cerr << "Base:  "  << url_base << std::endl;
+	
+	set_test_name("HttpRequest GET with Range: header to real service");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a GET that *can* connect
+		mStatus = HttpStatus(200);
+		HttpHandle handle = req->requestGetByteRange(HttpRequest::DEFAULT_POLICY_ID,
+													 0U,
+													 url_base,
+													 0,
+													 0,
+													 NULL,
+													 NULL,
+													 &handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if defined(WIN32)
+		// Can only do this memory test on Windows.  On other platforms,
+		// the LL logging system holds on to memory and produces what looks
+		// like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<10>()
+{
+	ScopedCurlInit ready;
+
+	std::string url_base(get_base_url());
+	// std::cerr << "Base:  "  << url_base << std::endl;
+	
+	set_test_name("HttpRequest PUT to real service");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	BufferArray * body = new BufferArray;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a GET that *can* connect
+		static const char * body_text("Now is the time for all good men...");
+		body->append(body_text, strlen(body_text));
+		mStatus = HttpStatus(200);
+		HttpHandle handle = req->requestPut(HttpRequest::DEFAULT_POLICY_ID,
+											0U,
+											url_base,
+											body,
+											NULL,
+											NULL,
+											&handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+
+		// Lose the request body
+		body->release();
+		body = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if 0 // defined(WIN32)
+		// Can't do this on any platform anymore, the LL logging system holds
+		// on to memory and produces what looks like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		if (body)
+		{
+			body->release();
+		}
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+template <> template <>
+void HttpRequestTestObjectType::test<11>()
+{
+	ScopedCurlInit ready;
+
+	std::string url_base(get_base_url());
+	// std::cerr << "Base:  "  << url_base << std::endl;
+	
+	set_test_name("HttpRequest POST to real service");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	BufferArray * body = new BufferArray;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a GET that *can* connect
+		static const char * body_text("Now is the time for all good men...");
+		body->append(body_text, strlen(body_text));
+		mStatus = HttpStatus(200);
+		HttpHandle handle = req->requestPost(HttpRequest::DEFAULT_POLICY_ID,
+											 0U,
+											 url_base,
+											 body,
+											 NULL,
+											 NULL,
+											 &handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+
+		// Lose the request body
+		body->release();
+		body = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if defined(WIN32)
+		// Can only do this memory test on Windows.  On other platforms,
+		// the LL logging system holds on to memory and produces what looks
+		// like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		if (body)
+		{
+			body->release();
+		}
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+template <> template <>
+void HttpRequestTestObjectType::test<12>()
+{
+	ScopedCurlInit ready;
+
+	std::string url_base(get_base_url());
+	// std::cerr << "Base:  "  << url_base << std::endl;
+	
+	set_test_name("HttpRequest GET with some tracing");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+
+		// Enable tracing
+		HttpRequest::setPolicyGlobalOption(LLCore::HttpRequest::GP_TRACE, 2);
+
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a GET that *can* connect
+		mStatus = HttpStatus(200);
+		HttpHandle handle = req->requestGetByteRange(HttpRequest::DEFAULT_POLICY_ID,
+													 0U,
+													 url_base,
+													 0,
+													 0,
+													 NULL,
+													 NULL,
+													 &handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if 0	// defined(WIN32)
+		// Can't do this on any platform anymore, the LL logging system holds
+		// on to memory and produces what looks like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<13>()
+{
+	ScopedCurlInit ready;
+
+	// Warmup boost::regex to pre-alloc memory for memory size tests
+	boost::regex warmup("askldjflasdj;f", boost::regex::icase);
+	boost::regex_match("akl;sjflajfk;ajsk", warmup);
+	
+	std::string url_base(get_base_url());
+	// std::cerr << "Base:  "  << url_base << std::endl;
+	
+	set_test_name("HttpRequest GET with returned headers");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+	handler.mHeadersRequired.reserve(20);				// Avoid memory leak test failure
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * opts = NULL;
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+
+		// Enable tracing
+		HttpRequest::setPolicyGlobalOption(LLCore::HttpRequest::GP_TRACE, 2);
+
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		opts = new HttpOptions();
+		opts->setWantHeaders(true);
+		
+		// Issue a GET that succeeds
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.push_back(boost::regex("\\W*X-LL-Special:.*", boost::regex::icase));
+		HttpHandle handle = req->requestGetByteRange(HttpRequest::DEFAULT_POLICY_ID,
+													 0U,
+													 url_base,
+													 0,
+													 0,
+													 opts,
+													 NULL,
+													 &handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// release options
+		opts->release();
+		opts = NULL;
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mHeadersRequired.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if defined(WIN32)
+		// Can only do this memory test on Windows.  On other platforms,
+		// the LL logging system holds on to memory and produces what looks
+		// like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (opts)
+		{
+			opts->release();
+			opts = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+template <> template <>
+void HttpRequestTestObjectType::test<14>()
+{
+	ScopedCurlInit ready;
+
+	set_test_name("HttpRequest GET timeout");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+	std::string url_base(get_base_url() + "/sleep/");	// path to a 30-second sleep
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * opts = NULL;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		opts = new HttpOptions();
+		opts->setRetries(0);			// Don't retry
+		opts->setTimeout(2);
+		
+		// Issue a GET that sleeps
+		mStatus = HttpStatus(HttpStatus::EXT_CURL_EASY, CURLE_OPERATION_TIMEDOUT);
+		HttpHandle handle = req->requestGetByteRange(HttpRequest::DEFAULT_POLICY_ID,
+													 0U,
+													 url_base,
+													 0,
+													 0,
+													 opts,
+													 NULL,
+													 &handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(50);				// With one retry, should fail quickish
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 100;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+
+		// release options
+		opts->release();
+		opts = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if defined(WIN32)
+		// Can only do this memory test on Windows.  On other platforms,
+		// the LL logging system holds on to memory and produces what looks
+		// like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (opts)
+		{
+			opts->release();
+			opts = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+// Test retrieval of Content-Type/Content-Encoding headers
+template <> template <>
+void HttpRequestTestObjectType::test<15>()
+{
+	ScopedCurlInit ready;
+
+	std::string url_base(get_base_url());
+	// std::cerr << "Base:  "  << url_base << std::endl;
+	
+	set_test_name("HttpRequest GET with Content-Type");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+
+	// Load and clear the string setting to preload std::string object
+	// for memory return tests.
+	handler.mCheckContentType = "application/llsd+xml";
+	handler.mCheckContentType.clear();
+		
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+		ensure("Memory allocated on construction", mMemTotal < GetMemTotal());
+
+		// Issue a GET that *can* connect
+		mStatus = HttpStatus(200);
+		handler.mCheckContentType = "application/llsd+xml";
+		HttpHandle handle = req->requestGet(HttpRequest::DEFAULT_POLICY_ID,
+											0U,
+											url_base,
+											NULL,
+											NULL,
+											&handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mCheckContentType.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	
+		ensure("Two handler calls on the way out", 2 == mHandlerCalls);
+
+#if defined(WIN32)
+		// Can only do this memory test on Windows.  On other platforms,
+		// the LL logging system holds on to memory and produces what looks
+		// like memory leaks...
+	
+		// printf("Old mem:  %d, New mem:  %d\n", mMemTotal, GetMemTotal());
+		ensure("Memory usage back to that at entry", mMemTotal == GetMemTotal());
+#endif
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+// Test header generation on GET requests
+template <> template <>
+void HttpRequestTestObjectType::test<16>()
+{
+	ScopedCurlInit ready;
+
+	// Warmup boost::regex to pre-alloc memory for memory size tests
+	boost::regex warmup("askldjflasdj;f", boost::regex::icase);
+	boost::regex_match("akl;sjflajfk;ajsk", warmup);
+
+	std::string url_base(get_base_url());
+	
+	set_test_name("Header generation for HttpRequest GET");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * options = NULL;
+	HttpHeaders * headers = NULL;
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+
+		// options set
+		options = new HttpOptions();
+		options->setWantHeaders(true);
+		
+		// Issue a GET that *can* connect
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-connection:\\s*keep-alive", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept:\\s*\\*/\\*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept-encoding:\\s*((gzip|deflate),\\s*)+(gzip|deflate)", boost::regex::icase)); // close enough
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-keep-alive:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-host:\\s*.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-cache-control:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-pragma:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-range:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-transfer-encoding:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-referer:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-type:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-encoding:.*", boost::regex::icase));
+		HttpHandle handle = req->requestGet(HttpRequest::DEFAULT_POLICY_ID,
+											0U,
+											url_base + "reflect/",
+											options,
+											NULL,
+											&handler);
+		ensure("Valid handle returned for get request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Do a texture-style fetch
+		headers = new HttpHeaders;
+		headers->mHeaders.push_back("Accept: image/x-j2c");
+		
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.clear();
+		handler.mHeadersDisallowed.clear();
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-connection:\\s*keep-alive", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept:\\s*image/x-j2c", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept-encoding:\\s*((gzip|deflate),\\s*)+(gzip|deflate)", boost::regex::icase)); // close enough
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-keep-alive:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-host:\\s*.*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("\\W*X-Reflect-range:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-cache-control:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-pragma:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-transfer-encoding:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-referer:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-type:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-encoding:.*", boost::regex::icase));
+		handle = req->requestGetByteRange(HttpRequest::DEFAULT_POLICY_ID,
+										  0U,
+										  url_base + "reflect/",
+										  0,
+										  47,
+										  options,
+										  headers,
+										  &handler);
+		ensure("Valid handle returned for ranged request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 2);
+
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mHeadersRequired.clear();
+		handler.mHeadersDisallowed.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 3)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 3);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release options & headers
+		if (options)
+		{
+			options->release();
+		}
+		options = NULL;
+
+		if (headers)
+		{
+			headers->release();
+		}
+		headers = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (options)
+		{
+			options->release();
+			options = NULL;
+		}
+		if (headers)
+		{
+			headers->release();
+			headers = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+// Test header generation on POST requests
+template <> template <>
+void HttpRequestTestObjectType::test<17>()
+{
+	ScopedCurlInit ready;
+
+	// Warmup boost::regex to pre-alloc memory for memory size tests
+	boost::regex warmup("askldjflasdj;f", boost::regex::icase);
+	boost::regex_match("akl;sjflajfk;ajsk", warmup);
+
+	std::string url_base(get_base_url());
+	
+	set_test_name("Header generation for HttpRequest POST");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * options = NULL;
+	HttpHeaders * headers = NULL;
+	BufferArray * ba = NULL;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+
+		// options set
+		options = new HttpOptions();
+		options->setWantHeaders(true);
+
+		// And a buffer array
+		const char * msg("It was the best of times, it was the worst of times.");
+		ba = new BufferArray;
+		ba->append(msg, strlen(msg));
+			
+		// Issue a default POST
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-connection:\\s*keep-alive", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept:\\s*\\*/\\*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept-encoding:\\s*((gzip|deflate),\\s*)+(gzip|deflate)", boost::regex::icase)); // close enough
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-keep-alive:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-host:\\s*.*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-content-length:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-content-type:\\s*application/x-www-form-urlencoded", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-cache-control:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-pragma:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-range:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-referer:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-encoding:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-expect:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-transfer-encoding:\\s*.*chunked.*", boost::regex::icase));
+		HttpHandle handle = req->requestPost(HttpRequest::DEFAULT_POLICY_ID,
+											 0U,
+											 url_base + "reflect/",
+											 ba,
+											 options,
+											 NULL,
+											 &handler);
+		ensure("Valid handle returned for get request", handle != LLCORE_HTTP_HANDLE_INVALID);
+		ba->release();
+		ba = NULL;
+			
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mHeadersRequired.clear();
+		handler.mHeadersDisallowed.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release options & headers
+		if (options)
+		{
+			options->release();
+		}
+		options = NULL;
+
+		if (headers)
+		{
+			headers->release();
+		}
+		headers = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (ba)
+		{
+			ba->release();
+			ba = NULL;
+		}
+		if (options)
+		{
+			options->release();
+			options = NULL;
+		}
+		if (headers)
+		{
+			headers->release();
+			headers = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+// Test header generation on PUT requests
+template <> template <>
+void HttpRequestTestObjectType::test<18>()
+{
+	ScopedCurlInit ready;
+
+	// Warmup boost::regex to pre-alloc memory for memory size tests
+	boost::regex warmup("askldjflasdj;f", boost::regex::icase);
+	boost::regex_match("akl;sjflajfk;ajsk", warmup);
+
+	std::string url_base(get_base_url());
+	
+	set_test_name("Header generation for HttpRequest PUT");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * options = NULL;
+	HttpHeaders * headers = NULL;
+	BufferArray * ba = NULL;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+
+		// options set
+		options = new HttpOptions();
+		options->setWantHeaders(true);
+
+		// And a buffer array
+		const char * msg("It was the best of times, it was the worst of times.");
+		ba = new BufferArray;
+		ba->append(msg, strlen(msg));
+			
+		// Issue a default PUT
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-connection:\\s*keep-alive", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept:\\s*\\*/\\*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept-encoding:\\s*((gzip|deflate),\\s*)+(gzip|deflate)", boost::regex::icase)); // close enough
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-keep-alive:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-host:\\s*.*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-content-length:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-cache-control:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-pragma:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-range:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-referer:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-encoding:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-expect:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-transfer-encoding:\\s*.*chunked.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-content-type:.*", boost::regex::icase));
+		HttpHandle handle = req->requestPut(HttpRequest::DEFAULT_POLICY_ID,
+											0U,
+											url_base + "reflect/",
+											ba,
+											options,
+											NULL,
+											&handler);
+		ensure("Valid handle returned for get request", handle != LLCORE_HTTP_HANDLE_INVALID);
+		ba->release();
+		ba = NULL;
+			
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mHeadersRequired.clear();
+		handler.mHeadersDisallowed.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release options & headers
+		if (options)
+		{
+			options->release();
+		}
+		options = NULL;
+
+		if (headers)
+		{
+			headers->release();
+		}
+		headers = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (ba)
+		{
+			ba->release();
+			ba = NULL;
+		}
+		if (options)
+		{
+			options->release();
+			options = NULL;
+		}
+		if (headers)
+		{
+			headers->release();
+			headers = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+// Test header generation on GET requests with overrides
+template <> template <>
+void HttpRequestTestObjectType::test<19>()
+{
+	ScopedCurlInit ready;
+
+	// Warmup boost::regex to pre-alloc memory for memory size tests
+	boost::regex warmup("askldjflasdj;f", boost::regex::icase);
+	boost::regex_match("akl;sjflajfk;ajsk", warmup);
+
+	std::string url_base(get_base_url());
+	
+	set_test_name("Header generation for HttpRequest GET with header overrides");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * options = NULL;
+	HttpHeaders * headers = NULL;
+
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+
+		// options set
+		options = new HttpOptions();
+		options->setWantHeaders(true);
+
+		// headers
+		headers = new HttpHeaders;
+		headers->mHeaders.push_back("Keep-Alive: 120");
+		headers->mHeaders.push_back("Accept-encoding: deflate");
+		headers->mHeaders.push_back("Accept: text/plain");
+
+		// Issue a GET with modified headers
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-connection:\\s*keep-alive", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept:\\s*text/plain", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept-encoding:\\s*deflate", boost::regex::icase)); // close enough
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-keep-alive:\\s*120", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-host:\\s*.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-accept-encoding:\\s*((gzip|deflate),\\s*)+(gzip|deflate)", boost::regex::icase)); // close enough
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-keep-alive:\\s*300", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-accept:\\s*\\*/\\*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-cache-control:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-pragma:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-range:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-transfer-encoding:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-referer:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-type:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-encoding:.*", boost::regex::icase));
+		HttpHandle handle = req->requestGet(HttpRequest::DEFAULT_POLICY_ID,
+											0U,
+											url_base + "reflect/",
+											options,
+											headers,
+											&handler);
+		ensure("Valid handle returned for get request", handle != LLCORE_HTTP_HANDLE_INVALID);
+
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mHeadersRequired.clear();
+		handler.mHeadersDisallowed.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release options & headers
+		if (options)
+		{
+			options->release();
+		}
+		options = NULL;
+
+		if (headers)
+		{
+			headers->release();
+		}
+		headers = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (options)
+		{
+			options->release();
+			options = NULL;
+		}
+		if (headers)
+		{
+			headers->release();
+			headers = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+// Test header generation on POST requests with overrides
+template <> template <>
+void HttpRequestTestObjectType::test<20>()
+{
+	ScopedCurlInit ready;
+
+	// Warmup boost::regex to pre-alloc memory for memory size tests
+	boost::regex warmup("askldjflasdj;f", boost::regex::icase);
+	boost::regex_match("akl;sjflajfk;ajsk", warmup);
+
+	std::string url_base(get_base_url());
+	
+	set_test_name("Header generation for HttpRequest POST with header overrides");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * options = NULL;
+	HttpHeaders * headers = NULL;
+	BufferArray * ba = NULL;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+
+		// options set
+		options = new HttpOptions();
+		options->setWantHeaders(true);
+
+		// headers
+		headers = new HttpHeaders();
+		headers->mHeaders.push_back("keep-Alive: 120");
+		headers->mHeaders.push_back("Accept:  text/html");
+		headers->mHeaders.push_back("content-type:  application/llsd+xml");
+		headers->mHeaders.push_back("cache-control: no-store");
+		
+		// And a buffer array
+		const char * msg("<xml><llsd><string>It was the best of times, it was the worst of times.</string></llsd></xml>");
+		ba = new BufferArray;
+		ba->append(msg, strlen(msg));
+			
+		// Issue a default POST
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-connection:\\s*keep-alive", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept:\\s*text/html", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept-encoding:\\s*((gzip|deflate),\\s*)+(gzip|deflate)", boost::regex::icase)); // close enough
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-keep-alive:\\s*120", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-host:\\s*.*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-content-length:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-content-type:\\s*application/llsd\\+xml", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("\\s*X-Reflect-cache-control:\\s*no-store", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-content-type:\\s*application/x-www-form-urlencoded", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-accept:\\s*\\*/\\*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-keep-alive:\\s*300", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-pragma:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-range:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-referer:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-encoding:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-expect:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-transfer-encoding:\\s*.*chunked.*", boost::regex::icase));
+		HttpHandle handle = req->requestPost(HttpRequest::DEFAULT_POLICY_ID,
+											 0U,
+											 url_base + "reflect/",
+											 ba,
+											 options,
+											 headers,
+											 &handler);
+		ensure("Valid handle returned for get request", handle != LLCORE_HTTP_HANDLE_INVALID);
+		ba->release();
+		ba = NULL;
+			
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mHeadersRequired.clear();
+		handler.mHeadersDisallowed.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release options & headers
+		if (options)
+		{
+			options->release();
+		}
+		options = NULL;
+
+		if (headers)
+		{
+			headers->release();
+		}
+		headers = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (ba)
+		{
+			ba->release();
+			ba = NULL;
+		}
+		if (options)
+		{
+			options->release();
+			options = NULL;
+		}
+		if (headers)
+		{
+			headers->release();
+			headers = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+// Test header generation on PUT requests with overrides
+template <> template <>
+void HttpRequestTestObjectType::test<21>()
+{
+	ScopedCurlInit ready;
+
+	// Warmup boost::regex to pre-alloc memory for memory size tests
+	boost::regex warmup("askldjflasdj;f", boost::regex::icase);
+	boost::regex_match("akl;sjflajfk;ajsk", warmup);
+
+	std::string url_base(get_base_url());
+	
+	set_test_name("Header generation for HttpRequest PUT with header overrides");
+
+	// Handler can be stack-allocated *if* there are no dangling
+	// references to it after completion of this method.
+	// Create before memory record as the string copy will bump numbers.
+	TestHandler2 handler(this, "handler");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+	mHandlerCalls = 0;
+
+	HttpRequest * req = NULL;
+	HttpOptions * options = NULL;
+	HttpHeaders * headers = NULL;
+	BufferArray * ba = NULL;
+	
+	try
+	{
+		// Get singletons created
+		HttpRequest::createService();
+		
+		// Start threading early so that thread memory is invariant
+		// over the test.
+		HttpRequest::startThread();
+
+		// create a new ref counted object with an implicit reference
+		req = new HttpRequest();
+
+		// options set
+		options = new HttpOptions();
+		options->setWantHeaders(true);
+
+		// headers
+		headers = new HttpHeaders;
+		headers->mHeaders.push_back("content-type:  text/plain");
+		headers->mHeaders.push_back("content-type:  text/html");
+		headers->mHeaders.push_back("content-type:  application/llsd+xml");
+		
+		// And a buffer array
+		const char * msg("<xml><llsd><string>It was the best of times, it was the worst of times.</string></llsd></xml>");
+		ba = new BufferArray;
+		ba->append(msg, strlen(msg));
+			
+		// Issue a default PUT
+		mStatus = HttpStatus(200);
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-connection:\\s*keep-alive", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept:\\s*\\*/\\*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-accept-encoding:\\s*((gzip|deflate),\\s*)+(gzip|deflate)", boost::regex::icase)); // close enough
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-keep-alive:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-host:\\s*.*", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-content-length:\\s*\\d+", boost::regex::icase));
+		handler.mHeadersRequired.push_back(boost::regex("X-Reflect-content-type:\\s*application/llsd\\+xml", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-cache-control:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-pragma:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-range:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-referer:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-content-encoding:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-expect:.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("\\s*X-Reflect-transfer-encoding:\\s*.*chunked.*", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-content-type:\\s*text/plain", boost::regex::icase));
+		handler.mHeadersDisallowed.push_back(boost::regex("X-Reflect-content-type:\\s*text/html", boost::regex::icase));
+		HttpHandle handle = req->requestPut(HttpRequest::DEFAULT_POLICY_ID,
+											0U,
+											url_base + "reflect/",
+											ba,
+											options,
+											headers,
+											&handler);
+		ensure("Valid handle returned for get request", handle != LLCORE_HTTP_HANDLE_INVALID);
+		ba->release();
+		ba = NULL;
+			
+		// Run the notification pump.
+		int count(0);
+		int limit(10);
+		while (count++ < limit && mHandlerCalls < 1)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Request executed in reasonable time", count < limit);
+		ensure("One handler invocation for request", mHandlerCalls == 1);
+
+
+		// Okay, request a shutdown of the servicing thread
+		mStatus = HttpStatus();
+		handler.mHeadersRequired.clear();
+		handler.mHeadersDisallowed.clear();
+		handle = req->requestStopThread(&handler);
+		ensure("Valid handle returned for second request", handle != LLCORE_HTTP_HANDLE_INVALID);
+	
+		// Run the notification pump again
+		count = 0;
+		limit = 10;
+		while (count++ < limit && mHandlerCalls < 2)
+		{
+			req->update(1000000);
+			usleep(100000);
+		}
+		ensure("Second request executed in reasonable time", count < limit);
+		ensure("Second handler invocation", mHandlerCalls == 2);
+
+		// See that we actually shutdown the thread
+		count = 0;
+		limit = 10;
+		while (count++ < limit && ! HttpService::isStopped())
+		{
+			usleep(100000);
+		}
+		ensure("Thread actually stopped running", HttpService::isStopped());
+	
+		// release options & headers
+		if (options)
+		{
+			options->release();
+		}
+		options = NULL;
+
+		if (headers)
+		{
+			headers->release();
+		}
+		headers = NULL;
+		
+		// release the request object
+		delete req;
+		req = NULL;
+
+		// Shut down service
+		HttpRequest::destroyService();
+	}
+	catch (...)
+	{
+		stop_thread(req);
+		if (ba)
+		{
+			ba->release();
+			ba = NULL;
+		}
+		if (options)
+		{
+			options->release();
+			options = NULL;
+		}
+		if (headers)
+		{
+			headers->release();
+			headers = NULL;
+		}
+		delete req;
+		HttpRequest::destroyService();
+		throw;
+	}
+}
+
+
+}  // end namespace tut
+
+namespace
+{
+
+#if defined(WIN32)
+
+void usleep(unsigned long usec)
+{
+	Sleep((DWORD) (usec / 1000UL));
+}
+
+#endif
+
+}
+
+#endif  // TEST_LLCORE_HTTP_REQUEST_H_
diff --git a/indra/llcorehttp/tests/test_httprequestqueue.hpp b/indra/llcorehttp/tests/test_httprequestqueue.hpp
new file mode 100644
index 0000000000..1de2d8f9ab
--- /dev/null
+++ b/indra/llcorehttp/tests/test_httprequestqueue.hpp
@@ -0,0 +1,186 @@
+/** 
+ * @file test_httprequestqueue.hpp
+ * @brief unit tests for the LLCore::HttpRequestQueue class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef TEST_LLCORE_HTTP_REQUESTQUEUE_H_
+#define TEST_LLCORE_HTTP_REQUESTQUEUE_H_
+
+#include "_httprequestqueue.h"
+
+#include <iostream>
+
+#include "test_allocator.h"
+#include "_httpoperation.h"
+
+
+using namespace LLCoreInt;
+
+
+
+namespace tut
+{
+
+struct HttpRequestqueueTestData
+{
+	// the test objects inherit from this so the member functions and variables
+	// can be referenced directly inside of the test functions.
+	size_t mMemTotal;
+};
+
+typedef test_group<HttpRequestqueueTestData> HttpRequestqueueTestGroupType;
+typedef HttpRequestqueueTestGroupType::object HttpRequestqueueTestObjectType;
+HttpRequestqueueTestGroupType HttpRequestqueueTestGroup("HttpRequestqueue Tests");
+
+template <> template <>
+void HttpRequestqueueTestObjectType::test<1>()
+{
+	set_test_name("HttpRequestQueue construction");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	HttpRequestQueue::init();
+	
+	ensure("One ref on construction of HttpRequestQueue", HttpRequestQueue::instanceOf()->getRefCount() == 1);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+
+	// release the implicit reference, causing the object to be released
+	HttpRequestQueue::term();
+
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void HttpRequestqueueTestObjectType::test<2>()
+{
+	set_test_name("HttpRequestQueue refcount works");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	HttpRequestQueue::init();
+
+	HttpRequestQueue * rq = HttpRequestQueue::instanceOf();
+	rq->addRef();
+	
+	// release the singleton, hold on to the object
+	HttpRequestQueue::term();
+	
+	ensure("One ref after term() called", rq->getRefCount() == 1);
+	ensure("Memory being used", mMemTotal < GetMemTotal());
+
+	// Drop ref
+	rq->release();
+	
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void HttpRequestqueueTestObjectType::test<3>()
+{
+	set_test_name("HttpRequestQueue addOp/fetchOp work");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	HttpRequestQueue::init();
+
+	HttpRequestQueue * rq = HttpRequestQueue::instanceOf();
+
+	HttpOperation * op = new HttpOpNull();
+
+	rq->addOp(op);		// transfer my refcount
+
+	op = rq->fetchOp(true);		// Potentially hangs the test on failure
+	ensure("One goes in, one comes out", NULL != op);
+	op->release();
+
+	op = rq->fetchOp(false);
+	ensure("Better not be two of them", NULL == op);
+	
+	// release the singleton, hold on to the object
+	HttpRequestQueue::term();
+	
+	// make sure we didn't leak any memory
+	ensure(mMemTotal == GetMemTotal());
+}
+
+template <> template <>
+void HttpRequestqueueTestObjectType::test<4>()
+{
+	set_test_name("HttpRequestQueue addOp/fetchAll work");
+
+	// record the total amount of dynamically allocated memory
+	mMemTotal = GetMemTotal();
+
+	// create a new ref counted object with an implicit reference
+	HttpRequestQueue::init();
+
+	HttpRequestQueue * rq = HttpRequestQueue::instanceOf();
+
+	HttpOperation * op = new HttpOpNull();
+	rq->addOp(op);		// transfer my refcount
+
+	op = new HttpOpNull();
+	rq->addOp(op);		// transfer my refcount
+
+	op = new HttpOpNull();
+	rq->addOp(op);		// transfer my refcount
+	
+	{
+		HttpRequestQueue::OpContainer ops;
+		rq->fetchAll(true, ops);		// Potentially hangs the test on failure
+		ensure("Three go in, three come out", 3 == ops.size());
+
+		op = rq->fetchOp(false);
+		ensure("Better not be any more of them", NULL == op);
+	
+		// release the singleton, hold on to the object
+		HttpRequestQueue::term();
+	
+		// We're still holding onto the ops.
+		ensure(mMemTotal < GetMemTotal());
+
+		// Release them
+		while (! ops.empty())
+		{
+			HttpOperation * op = ops.front();
+			ops.erase(ops.begin());
+			op->release();
+		}
+	}
+
+	// Should be clean
+	ensure("All memory returned", mMemTotal == GetMemTotal());
+}
+
+}  // end namespace tut
+
+
+#endif  // TEST_LLCORE_HTTP_REQUESTQUEUE_H_
diff --git a/indra/llcorehttp/tests/test_httpstatus.hpp b/indra/llcorehttp/tests/test_httpstatus.hpp
new file mode 100644
index 0000000000..f7b542d3b5
--- /dev/null
+++ b/indra/llcorehttp/tests/test_httpstatus.hpp
@@ -0,0 +1,265 @@
+/** 
+ * @file test_llrefcounted
+ * @brief unit tests for HttpStatus struct
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef TEST_HTTP_STATUS_H_
+#define TEST_HTTP_STATUS_H_
+
+#include "httpcommon.h"
+
+#include <curl/curl.h>
+#include <curl/multi.h>
+
+using namespace LLCore;
+
+namespace tut
+{
+
+struct HttpStatusTestData
+{
+	HttpStatusTestData()
+		{}
+};
+
+typedef test_group<HttpStatusTestData> HttpStatusTestGroupType;
+typedef HttpStatusTestGroupType::object HttpStatusTestObjectType;
+
+HttpStatusTestGroupType HttpStatusTestGroup("HttpStatus Tests");
+
+template <> template <>
+void HttpStatusTestObjectType::test<1>()
+{
+	set_test_name("HttpStatus construction");
+	
+	// auto allocation fine for this
+	HttpStatus status;
+	status.mType = HttpStatus::EXT_CURL_EASY;
+	status.mStatus = 0;
+	
+	ensure(bool(status));
+	ensure(false == !(status));
+
+	status.mType = HttpStatus::EXT_CURL_MULTI;
+	status.mStatus = 0;
+
+	ensure(bool(status));
+	ensure(false == !(status));
+	
+	status.mType = HttpStatus::LLCORE;
+	status.mStatus = HE_SUCCESS;
+	
+	ensure(bool(status));
+	ensure(false == !(status));
+
+	status.mType = HttpStatus::EXT_CURL_MULTI;
+	status.mStatus = -1;
+
+	ensure(false == bool(status));
+	ensure(!(status));
+
+	status.mType = HttpStatus::EXT_CURL_EASY;
+	status.mStatus = CURLE_BAD_DOWNLOAD_RESUME;
+
+	ensure(false == bool(status));
+	ensure(!(status));
+}
+
+
+template <> template <>
+void HttpStatusTestObjectType::test<2>()
+{
+	set_test_name("HttpStatus memory structure");
+
+	// Require that an HttpStatus object can be trivially
+	// returned as a function return value in registers.
+	// One should fit in an int on all platforms.
+
+	ensure(sizeof(HttpStatus) <= sizeof(int));
+}
+
+
+template <> template <>
+void HttpStatusTestObjectType::test<3>()
+{
+	set_test_name("HttpStatus valid error string conversion");
+	
+	HttpStatus status;
+	status.mType = HttpStatus::EXT_CURL_EASY;
+	status.mStatus = 0;
+	std::string msg = status.toString();
+	// std::cout << "Result:  " << msg << std::endl;
+	ensure(msg.empty());
+	
+	status.mType = HttpStatus::EXT_CURL_EASY;
+	status.mStatus = CURLE_BAD_FUNCTION_ARGUMENT;
+	msg = status.toString();
+	// std::cout << "Result:  " << msg << std::endl;
+	ensure(! msg.empty());
+
+	status.mType = HttpStatus::EXT_CURL_MULTI;
+	status.mStatus = CURLM_OUT_OF_MEMORY;
+	msg = status.toString();
+	// std::cout << "Result:  " << msg << std::endl;
+	ensure(! msg.empty());
+
+	status.mType = HttpStatus::LLCORE;
+	status.mStatus = HE_SHUTTING_DOWN;
+	msg = status.toString();
+	// std::cout << "Result:  " << msg << std::endl;
+	ensure(! msg.empty());
+}
+
+
+template <> template <>
+void HttpStatusTestObjectType::test<4>()
+{
+	set_test_name("HttpStatus invalid error string conversion");
+	
+	HttpStatus status;
+	status.mType = HttpStatus::EXT_CURL_EASY;
+	status.mStatus = 32726;
+	std::string msg = status.toString();
+	// std::cout << "Result:  " << msg << std::endl;
+	ensure(! msg.empty());
+	
+	status.mType = HttpStatus::EXT_CURL_MULTI;
+	status.mStatus = -470;
+	msg = status.toString();
+	// std::cout << "Result:  " << msg << std::endl;
+	ensure(! msg.empty());
+
+	status.mType = HttpStatus::LLCORE;
+	status.mStatus = 923;
+	msg = status.toString();
+	// std::cout << "Result:  " << msg << std::endl;
+	ensure(! msg.empty());
+}
+
+template <> template <>
+void HttpStatusTestObjectType::test<5>()
+{
+	set_test_name("HttpStatus equality/inequality testing");
+
+	// Make certain equality/inequality tests do not pass
+	// through the bool conversion.  Distinct successful
+	// and error statuses should compare unequal.
+
+	HttpStatus status1(HttpStatus::LLCORE, HE_SUCCESS);
+	HttpStatus status2(HttpStatus::EXT_CURL_EASY, HE_SUCCESS);
+	ensure(status1 != status2);
+
+	status1.mType = HttpStatus::LLCORE;
+	status1.mStatus = HE_REPLY_ERROR;
+	status2.mType = HttpStatus::LLCORE;
+	status2.mStatus= HE_SHUTTING_DOWN;
+	ensure(status1 != status2);
+}
+
+template <> template <>
+void HttpStatusTestObjectType::test<6>()
+{
+	set_test_name("HttpStatus basic HTTP status encoding");
+	
+	HttpStatus status;
+	status.mType = 200;
+	status.mStatus = HE_SUCCESS;
+	std::string msg = status.toString();
+	ensure(msg.empty());
+	ensure(bool(status));
+
+	// Normally a success but application says error
+	status.mStatus = HE_REPLY_ERROR;
+	msg = status.toString();
+	ensure(! msg.empty());
+	ensure(! bool(status));
+	ensure(status.toULong() > 1UL);				// Biggish number, not a bool-to-ulong
+
+	// Same statuses with distinct success/fail are distinct
+	status.mType = 200;
+	status.mStatus = HE_SUCCESS;
+	HttpStatus status2(200, HE_REPLY_ERROR);
+	ensure(status != status2);
+
+	// Normally an error but application says okay
+	status.mType = 406;
+	status.mStatus = HE_SUCCESS;
+	msg = status.toString();
+	ensure(msg.empty());
+	ensure(bool(status));
+
+	// Different statuses but both successful are distinct
+	status.mType = 200;
+	status.mStatus = HE_SUCCESS;
+	status2.mType = 201;
+	status2.mStatus = HE_SUCCESS;
+	ensure(status != status2);
+
+	// Different statuses but both failed are distinct
+	status.mType = 200;
+	status.mStatus = HE_REPLY_ERROR;
+	status2.mType = 201;
+	status2.mStatus = HE_REPLY_ERROR;
+	ensure(status != status2);
+}
+
+template <> template <>
+void HttpStatusTestObjectType::test<7>()
+{
+	set_test_name("HttpStatus HTTP error text strings");
+
+	HttpStatus status(100, HE_REPLY_ERROR);
+	std::string msg(status.toString());
+	ensure(! msg.empty());				// Should be something
+	ensure(msg == "Continue");
+
+	status.mStatus = HE_SUCCESS;
+	msg = status.toString();
+	ensure(msg.empty());				// Success is empty
+
+	status.mType = 199;
+	status.mStatus = HE_REPLY_ERROR;
+	msg = status.toString();
+	ensure(msg == "Unknown error");
+
+	status.mType = 505;					// Last defined string
+	status.mStatus = HE_REPLY_ERROR;
+	msg = status.toString();
+	ensure(msg == "HTTP Version not supported");
+
+	status.mType = 506;					// One beyond
+	status.mStatus = HE_REPLY_ERROR;
+	msg = status.toString();
+	ensure(msg == "Unknown error");
+
+	status.mType = 999;					// Last HTTP status
+	status.mStatus = HE_REPLY_ERROR;
+	msg = status.toString();
+	ensure(msg == "Unknown error");
+}
+
+} // end namespace tut
+
+#endif	// TEST_HTTP_STATUS_H
+
diff --git a/indra/llcorehttp/tests/test_llcorehttp_peer.py b/indra/llcorehttp/tests/test_llcorehttp_peer.py
new file mode 100644
index 0000000000..75a3c39ef2
--- /dev/null
+++ b/indra/llcorehttp/tests/test_llcorehttp_peer.py
@@ -0,0 +1,190 @@
+#!/usr/bin/env python
+"""\
+@file   test_llsdmessage_peer.py
+@author Nat Goodspeed
+@date   2008-10-09
+@brief  This script asynchronously runs the executable (with args) specified on
+        the command line, returning its result code. While that executable is
+        running, we provide dummy local services for use by C++ tests.
+
+$LicenseInfo:firstyear=2008&license=viewerlgpl$
+Second Life Viewer Source Code
+Copyright (C) 2012, Linden Research, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation;
+version 2.1 of the License only.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+$/LicenseInfo$
+"""
+
+import os
+import sys
+import time
+import select
+import getopt
+from threading import Thread
+from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
+from SocketServer import ThreadingMixIn
+
+mydir = os.path.dirname(__file__)       # expected to be .../indra/llcorehttp/tests/
+sys.path.insert(0, os.path.join(mydir, os.pardir, os.pardir, "lib", "python"))
+from indra.util.fastest_elementtree import parse as xml_parse
+from indra.base import llsd
+from testrunner import freeport, run, debug, VERBOSE
+
+class TestHTTPRequestHandler(BaseHTTPRequestHandler):
+    """This subclass of BaseHTTPRequestHandler is to receive and echo
+    LLSD-flavored messages sent by the C++ LLHTTPClient.
+    """
+    def read(self):
+        # The following logic is adapted from the library module
+        # SimpleXMLRPCServer.py.
+        # Get arguments by reading body of request.
+        # We read this in chunks to avoid straining
+        # socket.read(); around the 10 or 15Mb mark, some platforms
+        # begin to have problems (bug #792570).
+        try:
+            size_remaining = int(self.headers["content-length"])
+        except (KeyError, ValueError):
+            return ""
+        max_chunk_size = 10*1024*1024
+        L = []
+        while size_remaining:
+            chunk_size = min(size_remaining, max_chunk_size)
+            chunk = self.rfile.read(chunk_size)
+            L.append(chunk)
+            size_remaining -= len(chunk)
+        return ''.join(L)
+        # end of swiped read() logic
+
+    def read_xml(self):
+        # This approach reads the entire POST data into memory first
+        return llsd.parse(self.read())
+##         # This approach attempts to stream in the LLSD XML from self.rfile,
+##         # assuming that the underlying XML parser reads its input file
+##         # incrementally. Unfortunately I haven't been able to make it work.
+##         tree = xml_parse(self.rfile)
+##         debug("Finished raw parse")
+##         debug("parsed XML tree %s", tree)
+##         debug("parsed root node %s", tree.getroot())
+##         debug("root node tag %s", tree.getroot().tag)
+##         return llsd.to_python(tree.getroot())
+
+    def do_HEAD(self):
+        self.do_GET(withdata=False)
+
+    def do_GET(self, withdata=True):
+        # Of course, don't attempt to read data.
+        self.answer(dict(reply="success", status=200,
+                         reason="Your GET operation worked"))
+
+    def do_POST(self):
+        # Read the provided POST data.
+        # self.answer(self.read())
+        self.answer(dict(reply="success", status=200,
+                         reason=self.read()))
+
+    def do_PUT(self):
+        # Read the provided PUT data.
+        # self.answer(self.read())
+        self.answer(dict(reply="success", status=200,
+                         reason=self.read()))
+
+    def answer(self, data, withdata=True):
+        debug("%s.answer(%s): self.path = %r", self.__class__.__name__, data, self.path)
+        if "/sleep/" in self.path:
+            time.sleep(30)
+
+        if "fail" not in self.path:
+            data = data.copy()          # we're going to modify
+            # Ensure there's a "reply" key in data, even if there wasn't before
+            data["reply"] = data.get("reply", llsd.LLSD("success"))
+            response = llsd.format_xml(data)
+            debug("success: %s", response)
+            self.send_response(200)
+            if "/reflect/" in self.path:
+                self.reflect_headers()
+            self.send_header("Content-type", "application/llsd+xml")
+            self.send_header("Content-Length", str(len(response)))
+            self.send_header("X-LL-Special", "Mememememe");
+            self.end_headers()
+            if withdata:
+                self.wfile.write(response)
+        else:                           # fail requested
+            status = data.get("status", 500)
+            # self.responses maps an int status to a (short, long) pair of
+            # strings. We want the longer string. That's why we pass a string
+            # pair to get(): the [1] will select the second string, whether it
+            # came from self.responses or from our default pair.
+            reason = data.get("reason",
+                               self.responses.get(status,
+                                                  ("fail requested",
+                                                   "Your request specified failure status %s "
+                                                   "without providing a reason" % status))[1])
+            debug("fail requested: %s: %r", status, reason)
+            self.send_error(status, reason)
+            if "/reflect/" in self.path:
+                self.reflect_headers()
+            self.end_headers()
+
+    def reflect_headers(self):
+        for name in self.headers.keys():
+            # print "Header:  %s: %s" % (name, self.headers[name])
+            self.send_header("X-Reflect-" + name, self.headers[name])
+
+    if not VERBOSE:
+        # When VERBOSE is set, skip both these overrides because they exist to
+        # suppress output.
+
+        def log_request(self, code, size=None):
+            # For present purposes, we don't want the request splattered onto
+            # stderr, as it would upset devs watching the test run
+            pass
+
+        def log_error(self, format, *args):
+            # Suppress error output as well
+            pass
+
+class Server(ThreadingMixIn, HTTPServer):
+    # This pernicious flag is on by default in HTTPServer. But proper
+    # operation of freeport() absolutely depends on it being off.
+    allow_reuse_address = False
+
+if __name__ == "__main__":
+    do_valgrind = False
+    path_search = False
+    options, args = getopt.getopt(sys.argv[1:], "V", ["valgrind"])
+    for option, value in options:
+        if option == "-V" or option == "--valgrind":
+            do_valgrind = True
+
+    # Instantiate a Server(TestHTTPRequestHandler) on the first free port
+    # in the specified port range. Doing this inline is better than in a
+    # daemon thread: if it blows up here, we'll get a traceback. If it blew up
+    # in some other thread, the traceback would get eaten and we'd run the
+    # subject test program anyway.
+    httpd, port = freeport(xrange(8000, 8020),
+                           lambda port: Server(('127.0.0.1', port), TestHTTPRequestHandler))
+
+    # Pass the selected port number to the subject test program via the
+    # environment. We don't want to impose requirements on the test program's
+    # command-line parsing -- and anyway, for C++ integration tests, that's
+    # performed in TUT code rather than our own.
+    os.environ["LL_TEST_PORT"] = str(port)
+    debug("$LL_TEST_PORT = %s", port)
+    if do_valgrind:
+        args = ["valgrind", "--log-file=./valgrind.log"] + args
+        path_search = True
+    sys.exit(run(server=Thread(name="httpd", target=httpd.serve_forever), use_path=path_search, *args))
diff --git a/indra/llcorehttp/tests/test_refcounted.hpp b/indra/llcorehttp/tests/test_refcounted.hpp
new file mode 100644
index 0000000000..cb4b50287a
--- /dev/null
+++ b/indra/llcorehttp/tests/test_refcounted.hpp
@@ -0,0 +1,156 @@
+/** 
+ * @file test_refcounted.hpp
+ * @brief unit tests for the LLCoreInt::RefCounted class
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef TEST_LLCOREINT_REF_COUNTED_H_
+#define TEST_LLCOREINT_REF_COUNTED_H_
+
+#include "_refcounted.h"
+
+#include "test_allocator.h"
+
+using namespace LLCoreInt;
+
+namespace tut
+{
+	struct RefCountedTestData
+	{
+		// the test objects inherit from this so the member functions and variables
+		// can be referenced directly inside of the test functions.
+		size_t mMemTotal;
+	};
+
+	typedef test_group<RefCountedTestData> RefCountedTestGroupType;
+	typedef RefCountedTestGroupType::object RefCountedTestObjectType;
+	RefCountedTestGroupType RefCountedTestGroup("RefCounted Tests");
+
+	template <> template <>
+	void RefCountedTestObjectType::test<1>()
+	{
+		set_test_name("RefCounted construction with implicit count");
+
+		// record the total amount of dynamically allocated memory
+		mMemTotal = GetMemTotal();
+
+		// create a new ref counted object with an implicit reference
+		RefCounted * rc = new RefCounted(true);
+		ensure(rc->getRefCount() == 1);
+
+		// release the implicit reference, causing the object to be released
+		rc->release();
+
+		// make sure we didn't leak any memory
+		ensure(mMemTotal == GetMemTotal());
+	}
+
+	template <> template <>
+	void RefCountedTestObjectType::test<2>()
+	{
+		set_test_name("RefCounted construction without implicit count");
+
+		// record the total amount of dynamically allocated memory
+		mMemTotal = GetMemTotal();
+
+		// create a new ref counted object with an implicit reference
+		RefCounted * rc = new RefCounted(false);
+		ensure(rc->getRefCount() == 0);
+
+		// add a reference
+		rc->addRef();
+		ensure(rc->getRefCount() == 1);
+
+		// release the implicit reference, causing the object to be released
+		rc->release();
+
+		ensure(mMemTotal == GetMemTotal());
+	}
+
+	template <> template <>
+	void RefCountedTestObjectType::test<3>()
+	{
+		set_test_name("RefCounted addRef and release");
+
+		// record the total amount of dynamically allocated memory
+		mMemTotal = GetMemTotal();
+
+		RefCounted * rc = new RefCounted(false);
+
+		for (int i = 0; i < 1024; ++i)
+		{
+			rc->addRef();
+		}
+
+		ensure(rc->getRefCount() == 1024);
+
+		for (int i = 0; i < 1024; ++i)
+		{
+			rc->release();
+		}
+
+		// make sure we didn't leak any memory
+		ensure(mMemTotal == GetMemTotal());
+	}
+
+	template <> template <>
+	void RefCountedTestObjectType::test<4>()
+	{
+		set_test_name("RefCounted isLastRef check");
+
+		// record the total amount of dynamically allocated memory
+		mMemTotal = GetMemTotal();
+
+		RefCounted * rc = new RefCounted(true);
+
+		// with only one reference, isLastRef should be true
+		ensure(rc->isLastRef());
+
+		// release it to clean up memory
+		rc->release();
+
+		// make sure we didn't leak any memory
+		ensure(mMemTotal == GetMemTotal());
+	}
+
+	template <> template <>
+	void RefCountedTestObjectType::test<5>()
+	{
+		set_test_name("RefCounted noRef check");
+
+		// record the total amount of dynamically allocated memory
+		mMemTotal = GetMemTotal();
+
+		RefCounted * rc = new RefCounted(false);
+
+		// set the noRef
+		rc->noRef();
+
+		// with only one reference, isLastRef should be true
+		ensure(rc->getRefCount() == RefCounted::NOT_REF_COUNTED);
+
+		// allow this memory leak, but check that we're leaking a known amount
+		ensure(mMemTotal == (GetMemTotal() - sizeof(RefCounted)));
+	}
+}
+
+#endif	// TEST_LLCOREINT_REF_COUNTED_H_
diff --git a/indra/llcorehttp/tests/testrunner.py b/indra/llcorehttp/tests/testrunner.py
new file mode 100644
index 0000000000..9a2de71142
--- /dev/null
+++ b/indra/llcorehttp/tests/testrunner.py
@@ -0,0 +1,265 @@
+#!/usr/bin/env python
+"""\
+@file   testrunner.py
+@author Nat Goodspeed
+@date   2009-03-20
+@brief  Utilities for writing wrapper scripts for ADD_COMM_BUILD_TEST unit tests
+
+$LicenseInfo:firstyear=2009&license=viewerlgpl$
+Second Life Viewer Source Code
+Copyright (C) 2010, Linden Research, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation;
+version 2.1 of the License only.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+$/LicenseInfo$
+"""
+
+from __future__ import with_statement
+
+import os
+import sys
+import re
+import errno
+import socket
+
+VERBOSE = os.environ.get("INTEGRATION_TEST_VERBOSE", "0") # default to quiet
+# Support usage such as INTEGRATION_TEST_VERBOSE=off -- distressing to user if
+# that construct actually turns on verbosity...
+VERBOSE = not re.match(r"(0|off|false|quiet)$", VERBOSE, re.IGNORECASE)
+
+if VERBOSE:
+    def debug(fmt, *args):
+        print fmt % args
+        sys.stdout.flush()
+else:
+    debug = lambda *args: None
+
+def freeport(portlist, expr):
+    """
+    Find a free server port to use. Specifically, evaluate 'expr' (a
+    callable(port)) until it stops raising EADDRINUSE exception.
+
+    Pass:
+
+    portlist: an iterable (e.g. xrange()) of ports to try. If you exhaust the
+    range, freeport() lets the socket.error exception propagate. If you want
+    unbounded, you could pass itertools.count(baseport), though of course in
+    practice the ceiling is 2^16-1 anyway. But it seems prudent to constrain
+    the range much more sharply: if we're iterating an absurd number of times,
+    probably something else is wrong.
+
+    expr: a callable accepting a port number, specifically one of the items
+    from portlist. If calling that callable raises socket.error with
+    EADDRINUSE, freeport() retrieves the next item from portlist and retries.
+
+    Returns: (expr(port), port)
+
+    port: the value from portlist for which expr(port) succeeded
+
+    Raises:
+
+    Any exception raised by expr(port) other than EADDRINUSE.
+
+    socket.error if, for every item from portlist, expr(port) raises
+    socket.error. The exception you see is the one from the last item in
+    portlist.
+
+    StopIteration if portlist is completely empty.
+
+    Example:
+
+    class Server(HTTPServer):
+        # If you use BaseHTTPServer.HTTPServer, turning off this flag is
+        # essential for proper operation of freeport()!
+        allow_reuse_address = False
+    # ...
+    server, port = freeport(xrange(8000, 8010),
+                            lambda port: Server(("localhost", port),
+                                                MyRequestHandler))
+    # pass 'port' to client code
+    # call server.serve_forever()
+    """
+    try:
+        # If portlist is completely empty, let StopIteration propagate: that's an
+        # error because we can't return meaningful values. We have no 'port',
+        # therefore no 'expr(port)'.
+        portiter = iter(portlist)
+        port = portiter.next()
+
+        while True:
+            try:
+                # If this value of port works, return as promised.
+                value = expr(port)
+
+            except socket.error, err:
+                # Anything other than 'Address already in use', propagate
+                if err.args[0] != errno.EADDRINUSE:
+                    raise
+
+                # Here we want the next port from portiter. But on StopIteration,
+                # we want to raise the original exception rather than
+                # StopIteration. So save the original exc_info().
+                type, value, tb = sys.exc_info()
+                try:
+                    try:
+                        port = portiter.next()
+                    except StopIteration:
+                        raise type, value, tb
+                finally:
+                    # Clean up local traceback, see docs for sys.exc_info()
+                    del tb
+
+            else:
+                debug("freeport() returning %s on port %s", value, port)
+                return value, port
+
+            # Recap of the control flow above:
+            # If expr(port) doesn't raise, return as promised.
+            # If expr(port) raises anything but EADDRINUSE, propagate that
+            # exception.
+            # If portiter.next() raises StopIteration -- that is, if the port
+            # value we just passed to expr(port) was the last available -- reraise
+            # the EADDRINUSE exception.
+            # If we've actually arrived at this point, portiter.next() delivered a
+            # new port value. Loop back to pass that to expr(port).
+
+    except Exception, err:
+        debug("*** freeport() raising %s: %s", err.__class__.__name__, err)
+        raise
+
+def run(*args, **kwds):
+    """All positional arguments collectively form a command line, executed as
+    a synchronous child process.
+    In addition, pass server=new_thread_instance as an explicit keyword (to
+    differentiate it from an additional command-line argument).
+    new_thread_instance should be an instantiated but not yet started Thread
+    subclass instance, e.g.:
+    run("python", "-c", 'print "Hello, world!"', server=TestHTTPServer(name="httpd"))
+    """
+    # If there's no server= keyword arg, don't start a server thread: simply
+    # run a child process.
+    try:
+        thread = kwds.pop("server")
+    except KeyError:
+        pass
+    else:
+        # Start server thread. Note that this and all other comm server
+        # threads should be daemon threads: we'll let them run "forever,"
+        # confident that the whole process will terminate when the main thread
+        # terminates, which will be when the child process terminates.
+        thread.setDaemon(True)
+        thread.start()
+    # choice of os.spawnv():
+    # - [v vs. l] pass a list of args vs. individual arguments,
+    # - [no p] don't use the PATH because we specifically want to invoke the
+    #   executable passed as our first arg,
+    # - [no e] child should inherit this process's environment.
+    debug("Running %s...", " ".join(args))
+    if kwds.get("use_path", False):
+        rc = os.spawnvp(os.P_WAIT, args[0], args)
+    else:
+        rc = os.spawnv(os.P_WAIT, args[0], args)
+    debug("%s returned %s", args[0], rc)
+    return rc
+
+# ****************************************************************************
+#   test code -- manual at this point, see SWAT-564
+# ****************************************************************************
+def test_freeport():
+    # ------------------------------- Helpers --------------------------------
+    from contextlib import contextmanager
+    # helper Context Manager for expecting an exception
+    # with exc(SomeError):
+    #     raise SomeError()
+    # raises AssertionError otherwise.
+    @contextmanager
+    def exc(exception_class, *args):
+        try:
+            yield
+        except exception_class, err:
+            for i, expected_arg in enumerate(args):
+                assert expected_arg == err.args[i], \
+                       "Raised %s, but args[%s] is %r instead of %r" % \
+                       (err.__class__.__name__, i, err.args[i], expected_arg)
+            print "Caught expected exception %s(%s)" % \
+                  (err.__class__.__name__, ', '.join(repr(arg) for arg in err.args))
+        else:
+            assert False, "Failed to raise " + exception_class.__class__.__name__
+
+    # helper to raise specified exception
+    def raiser(exception):
+        raise exception
+
+    # the usual
+    def assert_equals(a, b):
+        assert a == b, "%r != %r" % (a, b)
+
+    # ------------------------ Sanity check the above ------------------------
+    class SomeError(Exception): pass
+    # Without extra args, accept any err.args value
+    with exc(SomeError):
+        raiser(SomeError("abc"))
+    # With extra args, accept only the specified value
+    with exc(SomeError, "abc"):
+        raiser(SomeError("abc"))
+    with exc(AssertionError):
+        with exc(SomeError, "abc"):
+            raiser(SomeError("def"))
+    with exc(AssertionError):
+        with exc(socket.error, errno.EADDRINUSE):
+            raiser(socket.error(errno.ECONNREFUSED, 'Connection refused'))
+
+    # ----------- freeport() without engaging socket functionality -----------
+    # If portlist is empty, freeport() raises StopIteration.
+    with exc(StopIteration):
+        freeport([], None)
+
+    assert_equals(freeport([17], str), ("17", 17))
+
+    # This is the magic exception that should prompt us to retry
+    inuse = socket.error(errno.EADDRINUSE, 'Address already in use')
+    # Get the iterator to our ports list so we can check later if we've used all
+    ports = iter(xrange(5))
+    with exc(socket.error, errno.EADDRINUSE):
+        freeport(ports, lambda port: raiser(inuse))
+    # did we entirely exhaust 'ports'?
+    with exc(StopIteration):
+        ports.next()
+
+    ports = iter(xrange(2))
+    # Any exception but EADDRINUSE should quit immediately
+    with exc(SomeError):
+        freeport(ports, lambda port: raiser(SomeError()))
+    assert_equals(ports.next(), 1)
+
+    # ----------- freeport() with platform-dependent socket stuff ------------
+    # This is what we should've had unit tests to begin with (see CHOP-661).
+    def newbind(port):
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.bind(('127.0.0.1', port))
+        return sock
+
+    bound0, port0 = freeport(xrange(7777, 7780), newbind)
+    assert_equals(port0, 7777)
+    bound1, port1 = freeport(xrange(7777, 7780), newbind)
+    assert_equals(port1, 7778)
+    bound2, port2 = freeport(xrange(7777, 7780), newbind)
+    assert_equals(port2, 7779)
+    with exc(socket.error, errno.EADDRINUSE):
+        bound3, port3 = freeport(xrange(7777, 7780), newbind)
+
+if __name__ == "__main__":
+    test_freeport()
diff --git a/indra/llmessage/llcurl.cpp b/indra/llmessage/llcurl.cpp
index 0d01dd0e3e..8ffa8e4271 100644
--- a/indra/llmessage/llcurl.cpp
+++ b/indra/llmessage/llcurl.cpp
@@ -294,6 +294,8 @@ LLCurl::Easy* LLCurl::Easy::getEasy()
 	// multi handles cache if they are added to one.
 	CURLcode result = curl_easy_setopt(easy->mCurlEasyHandle, CURLOPT_DNS_CACHE_TIMEOUT, 0);
 	check_curl_code(result);
+	result = curl_easy_setopt(easy->mCurlEasyHandle, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
+	check_curl_code(result);
 	
 	++gCurlEasyCount;
 	return easy;
@@ -482,7 +484,8 @@ void LLCurl::Easy::prepRequest(const std::string& url,
 
 	//setopt(CURLOPT_VERBOSE, 1); // useful for debugging
 	setopt(CURLOPT_NOSIGNAL, 1);
-
+	setopt(CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
+	
 	// Set the CURL options for either Socks or HTTP proxy
 	LLProxy::getInstance()->applyProxySettings(this);
 
diff --git a/indra/llmessage/llhttpassetstorage.cpp b/indra/llmessage/llhttpassetstorage.cpp
index 612d765969..d6ed08055e 100644
--- a/indra/llmessage/llhttpassetstorage.cpp
+++ b/indra/llmessage/llhttpassetstorage.cpp
@@ -749,7 +749,7 @@ LLAssetRequest* LLHTTPAssetStorage::findNextRequest(LLAssetStorage::request_list
 	request_list_t::iterator pending_iter = pending.begin();
 	request_list_t::iterator pending_end  = pending.end();
 	// Loop over all pending requests until we miss finding it in the running list.
-	for (; pending_iter != pending.end(); ++pending_iter)
+	for (; pending_iter != pending_end; ++pending_iter)
 	{
 		LLAssetRequest* req = *pending_iter;
 		// Look for this pending request in the running list.
diff --git a/indra/llui/llcontainerview.cpp b/indra/llui/llcontainerview.cpp
index e08ccb0b78..e08ccb0b78 100755..100644
--- a/indra/llui/llcontainerview.cpp
+++ b/indra/llui/llcontainerview.cpp
diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index ccf4ce8d1f..7eea9ece5a 100755
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -18,6 +18,7 @@ include(JsonCpp)
 include(LLAudio)
 include(LLCharacter)
 include(LLCommon)
+include(LLCoreHttp)
 include(LLImage)
 include(LLImageJ2COJ)
 include(LLInventory)
@@ -57,6 +58,7 @@ include_directories(
     ${LLAUDIO_INCLUDE_DIRS}
     ${LLCHARACTER_INCLUDE_DIRS}
     ${LLCOMMON_INCLUDE_DIRS}
+    ${LLCOREHTTP_INCLUDE_DIRS}
     ${LLPHYSICS_INCLUDE_DIRS}
     ${FMOD_INCLUDE_DIR}
     ${LLIMAGE_INCLUDE_DIRS}
@@ -97,6 +99,7 @@ set(viewer_SOURCE_FILES
     llagentwearables.cpp
     llagentwearablesfetch.cpp
     llanimstatelabels.cpp
+    llappcorehttp.cpp
     llappearancemgr.cpp
     llappviewer.cpp
     llappviewerlistener.cpp
@@ -672,6 +675,7 @@ set(viewer_HEADER_FILES
     llagentwearables.h
     llagentwearablesfetch.h
     llanimstatelabels.h
+    llappcorehttp.h
     llappearance.h
     llappearancemgr.h
     llappviewer.h
@@ -1812,6 +1816,7 @@ target_link_libraries(${VIEWER_BINARY_NAME}
     ${LLXML_LIBRARIES}
     ${LSCRIPT_LIBRARIES}
     ${LLMATH_LIBRARIES}
+    ${LLCOREHTTP_LIBRARIES}
     ${LLCOMMON_LIBRARIES}
     ${NDOF_LIBRARY}
     ${HUNSPELL_LIBRARY}
diff --git a/indra/newview/app_settings/logcontrol.xml b/indra/newview/app_settings/logcontrol.xml
index 64122bbb6c..64122bbb6c 100755..100644
--- a/indra/newview/app_settings/logcontrol.xml
+++ b/indra/newview/app_settings/logcontrol.xml
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 5e42fc29f7..190dd5e2d5 100755
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -10789,6 +10789,17 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+    <key>TextureFetchConcurrency</key>
+    <map>
+      <key>Comment</key>
+      <string>Maximum number of HTTP connections used for texture fetches</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>U32</string>
+      <key>Value</key>
+      <integer>0</integer>
+    </map>
     <key>TextureFetchDebuggerEnabled</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/llagentwearables.cpp b/indra/newview/llagentwearables.cpp
index e441f21f90..e441f21f90 100755..100644
--- a/indra/newview/llagentwearables.cpp
+++ b/indra/newview/llagentwearables.cpp
diff --git a/indra/newview/llagentwearables.h b/indra/newview/llagentwearables.h
index 5932be21c6..5932be21c6 100755..100644
--- a/indra/newview/llagentwearables.h
+++ b/indra/newview/llagentwearables.h
diff --git a/indra/newview/llappcorehttp.cpp b/indra/newview/llappcorehttp.cpp
new file mode 100644
index 0000000000..0d7d41304d
--- /dev/null
+++ b/indra/newview/llappcorehttp.cpp
@@ -0,0 +1,192 @@
+/**
+ * @file llappcorehttp.cpp
+ * @brief 
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llappcorehttp.h"
+
+#include "llviewercontrol.h"
+
+
+const F64 LLAppCoreHttp::MAX_THREAD_WAIT_TIME(10.0);
+
+LLAppCoreHttp::LLAppCoreHttp()
+	: mRequest(NULL),
+	  mStopHandle(LLCORE_HTTP_HANDLE_INVALID),
+	  mStopRequested(0.0),
+	  mStopped(false),
+	  mPolicyDefault(-1)
+{}
+
+
+LLAppCoreHttp::~LLAppCoreHttp()
+{
+	delete mRequest;
+	mRequest = NULL;
+}
+
+
+void LLAppCoreHttp::init()
+{
+	LLCore::HttpStatus status = LLCore::HttpRequest::createService();
+	if (! status)
+	{
+		LL_ERRS("Init") << "Failed to initialize HTTP services.  Reason:  "
+						<< status.toString()
+						<< LL_ENDL;
+	}
+
+	// Point to our certs or SSH/https: will fail on connect
+	status = LLCore::HttpRequest::setPolicyGlobalOption(LLCore::HttpRequest::GP_CA_FILE,
+														gDirUtilp->getCAFile());
+	if (! status)
+	{
+		LL_ERRS("Init") << "Failed to set CA File for HTTP services.  Reason:  "
+						<< status.toString()
+						<< LL_ENDL;
+	}
+
+	// Establish HTTP Proxy.  "LLProxy" is a special string which directs
+	// the code to use LLProxy::applyProxySettings() to establish any
+	// HTTP or SOCKS proxy for http operations.
+	status = LLCore::HttpRequest::setPolicyGlobalOption(LLCore::HttpRequest::GP_LLPROXY, 1);
+	if (! status)
+	{
+		LL_ERRS("Init") << "Failed to set HTTP proxy for HTTP services.  Reason:  "
+						<< status.toString()
+						<< LL_ENDL;
+	}
+
+	// Tracing levels for library & libcurl (note that 2 & 3 are beyond spammy):
+	// 0 - None
+	// 1 - Basic start, stop simple transitions
+	// 2 - libcurl CURLOPT_VERBOSE mode with brief lines
+	// 3 - with partial data content
+	static const std::string http_trace("QAModeHttpTrace");
+	if (gSavedSettings.controlExists(http_trace))
+	{
+		long trace_level(0L);
+		trace_level = long(gSavedSettings.getU32(http_trace));
+		status = LLCore::HttpRequest::setPolicyGlobalOption(LLCore::HttpRequest::GP_TRACE, trace_level);
+	}
+	
+	// Setup default policy and constrain if directed to
+	mPolicyDefault = LLCore::HttpRequest::DEFAULT_POLICY_ID;
+	static const std::string texture_concur("TextureFetchConcurrency");
+	if (gSavedSettings.controlExists(texture_concur))
+	{
+		U32 concur(llmin(gSavedSettings.getU32(texture_concur), U32(12)));
+
+		if (concur > 0)
+		{
+			LLCore::HttpStatus status;
+			status = LLCore::HttpRequest::setPolicyClassOption(mPolicyDefault,
+															   LLCore::HttpRequest::CP_CONNECTION_LIMIT,
+															   concur);
+			if (! status)
+			{
+				LL_WARNS("Init") << "Unable to set texture fetch concurrency.  Reason:  "
+								 << status.toString()
+								 << LL_ENDL;
+			}
+			else
+			{
+				LL_INFOS("Init") << "Application settings overriding default texture fetch concurrency.  New value:  "
+								 << concur
+								 << LL_ENDL;
+			}
+		}
+	}
+	
+	// Kick the thread
+	status = LLCore::HttpRequest::startThread();
+	if (! status)
+	{
+		LL_ERRS("Init") << "Failed to start HTTP servicing thread.  Reason:  "
+						<< status.toString()
+						<< LL_ENDL;
+	}
+
+	mRequest = new LLCore::HttpRequest;
+}
+
+
+void LLAppCoreHttp::requestStop()
+{
+	llassert_always(mRequest);
+
+	mStopHandle = mRequest->requestStopThread(this);
+	if (LLCORE_HTTP_HANDLE_INVALID != mStopHandle)
+	{
+		mStopRequested = LLTimer::getTotalSeconds();
+	}
+}
+
+
+void LLAppCoreHttp::cleanup()
+{
+	if (LLCORE_HTTP_HANDLE_INVALID == mStopHandle)
+	{
+		// Should have been started already...
+		requestStop();
+	}
+	
+	if (LLCORE_HTTP_HANDLE_INVALID == mStopHandle)
+	{
+		LL_WARNS("Cleanup") << "Attempting to cleanup HTTP services without thread shutdown"
+							<< LL_ENDL;
+	}
+	else
+	{
+		while (! mStopped && LLTimer::getTotalSeconds() < (mStopRequested + MAX_THREAD_WAIT_TIME))
+		{
+			mRequest->update(200000);
+			ms_sleep(50);
+		}
+		if (! mStopped)
+		{
+			LL_WARNS("Cleanup") << "Attempting to cleanup HTTP services with thread shutdown incomplete"
+								<< LL_ENDL;
+		}
+	}
+
+	delete mRequest;
+	mRequest = NULL;
+
+	LLCore::HttpStatus status = LLCore::HttpRequest::destroyService();
+	if (! status)
+	{
+		LL_WARNS("Cleanup") << "Failed to shutdown HTTP services, continuing.  Reason:  "
+							<< status.toString()
+							<< LL_ENDL;
+	}
+}
+
+
+void LLAppCoreHttp::onCompleted(LLCore::HttpHandle, LLCore::HttpResponse *)
+{
+	mStopped = true;
+}
diff --git a/indra/newview/llappcorehttp.h b/indra/newview/llappcorehttp.h
new file mode 100644
index 0000000000..241d73ad52
--- /dev/null
+++ b/indra/newview/llappcorehttp.h
@@ -0,0 +1,86 @@
+/**
+ * @file llappcorehttp.h
+ * @brief Singleton initialization/shutdown class for llcorehttp library
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef	_LL_APP_COREHTTP_H_
+#define	_LL_APP_COREHTTP_H_
+
+
+#include "httprequest.h"
+#include "httphandler.h"
+#include "httpresponse.h"
+
+
+// This class manages the lifecyle of the core http library.
+// Slightly different style than traditional code but reflects
+// the use of handler classes and light-weight interface
+// object instances of the new libraries.  To be used
+// as a singleton and static construction is fine.
+class LLAppCoreHttp : public LLCore::HttpHandler
+{
+public:
+	LLAppCoreHttp();
+	~LLAppCoreHttp();
+	
+	// Initialize the LLCore::HTTP library creating service classes
+	// and starting the servicing thread.  Caller is expected to do
+	// other initializations (SSL mutex, thread hash function) appropriate
+	// for the application.
+	void init();
+
+	// Request that the servicing thread stop servicing requests,
+	// release resource references and stop.  Request is asynchronous
+	// and @see cleanup() will perform a limited wait loop for this
+	// request to stop the thread.
+	void requestStop();
+	
+	// Terminate LLCore::HTTP library services.  Caller is expected
+	// to have made a best-effort to shutdown the servicing thread
+	// by issuing a requestThreadStop() and waiting for completion
+	// notification that the stop has completed.
+	void cleanup();
+
+	// Notification when the stop request is complete.
+	virtual void onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response);
+
+	// Retrieve the policy class for default operations.
+	int getPolicyDefault() const
+		{
+			return mPolicyDefault;
+		}
+	
+private:
+	static const F64			MAX_THREAD_WAIT_TIME;
+	
+private:
+	LLCore::HttpRequest *		mRequest;
+	LLCore::HttpHandle			mStopHandle;
+	F64							mStopRequested;
+	bool						mStopped;
+	int							mPolicyDefault;
+};
+
+
+#endif	// _LL_APP_COREHTTP_H_
diff --git a/indra/newview/llappearancemgr.cpp b/indra/newview/llappearancemgr.cpp
index 6d67e098a6..6d67e098a6 100755..100644
--- a/indra/newview/llappearancemgr.cpp
+++ b/indra/newview/llappearancemgr.cpp
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 0a9d6229ef..39df2d08c3 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -4,7 +4,7 @@
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
+ * Copyright (C) 2012, Linden Research, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -219,6 +219,7 @@
 #include "llmachineid.h"
 #include "llmainlooprepeater.h"
 
+
 // *FIX: These extern globals should be cleaned up.
 // The globals either represent state/config/resource-storage of either 
 // this app, or another 'component' of the viewer. App globals should be 
@@ -734,6 +735,10 @@ bool LLAppViewer::init()
 	LLViewerStatsRecorder::initClass();
 #endif
 
+	// Initialize the non-LLCurl libcurl library.  Should be called
+	// before consumers (LLTextureFetch).
+	mAppCoreHttp.init();
+	
     // *NOTE:Mani - LLCurl::initClass is not thread safe. 
     // Called before threads are created.
     LLCurl::initClass(gSavedSettings.getF32("CurlRequestTimeOut"), 
@@ -1884,6 +1889,7 @@ bool LLAppViewer::cleanup()
 
 	// Delete workers first
 	// shotdown all worker threads before deleting them in case of co-dependencies
+	mAppCoreHttp.requestStop();
 	sTextureFetch->shutdown();
 	sTextureCache->shutdown();	
 	sImageDecodeThread->shutdown();
@@ -1899,6 +1905,9 @@ bool LLAppViewer::cleanup()
 	LLCurl::cleanupClass();
 	LL_CHECK_MEMORY
 
+	// Non-LLCurl libcurl library
+	mAppCoreHttp.cleanup();
+
 	LLFilePickerThread::cleanupClass();
 
 	//MUST happen AFTER LLCurl::cleanupClass
diff --git a/indra/newview/llappviewer.h b/indra/newview/llappviewer.h
index ae3c795d1e..0d9c420ff8 100644
--- a/indra/newview/llappviewer.h
+++ b/indra/newview/llappviewer.h
@@ -31,6 +31,7 @@
 #include "llcontrol.h"
 #include "llsys.h"			// for LLOSInfo
 #include "lltimer.h"
+#include "llappcorehttp.h"
 
 class LLCommandLineParser;
 class LLFrameTimer;
@@ -173,6 +174,9 @@ public:
 	// Metrics policy helper statics.
 	static void metricsUpdateRegion(U64 region_handle);
 	static void metricsSend(bool enable_reporting);
+
+	// llcorehttp init/shutdown/config information.
+	LLAppCoreHttp & getAppCoreHttp()			{ return mAppCoreHttp; }
 	
 protected:
 	virtual bool initWindow(); // Initialize the viewer's window.
@@ -271,6 +275,9 @@ private:
 	
 	boost::scoped_ptr<LLUpdaterService> mUpdater;
 
+	// llcorehttp library init/shutdown helper
+	LLAppCoreHttp mAppCoreHttp;
+
 	//---------------------------------------------
 	//*NOTE: Mani - legacy updater stuff
 	// Still useable?
diff --git a/indra/newview/llinventorymodel.cpp b/indra/newview/llinventorymodel.cpp
index 6e23d7c701..6e23d7c701 100755..100644
--- a/indra/newview/llinventorymodel.cpp
+++ b/indra/newview/llinventorymodel.cpp
diff --git a/indra/newview/lltexturefetch.cpp b/indra/newview/lltexturefetch.cpp
index adffb2c706..a2854dd6d8 100644
--- a/indra/newview/lltexturefetch.cpp
+++ b/indra/newview/lltexturefetch.cpp
@@ -4,7 +4,7 @@
  *
  * $LicenseInfo:firstyear=2000&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
+ * Copyright (C) 2012, Linden Research, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -28,12 +28,12 @@
 
 #include <iostream>
 #include <map>
+#include <algorithm>
 
 #include "llstl.h"
 
 #include "lltexturefetch.h"
 
-#include "llcurl.h"
 #include "lldir.h"
 #include "llhttpclient.h"
 #include "llhttpstatuscodes.h"
@@ -54,28 +54,214 @@
 #include "llworld.h"
 #include "llsdutil.h"
 #include "llstartup.h"
-#include "llviewerstats.h"
+#include "llsdserialize.h"
+
+#include "httprequest.h"
+#include "httphandler.h"
+#include "httpresponse.h"
+#include "bufferarray.h"
+#include "bufferstream.h"
 
 bool LLTextureFetchDebugger::sDebuggerEnabled = false ;
 LLStat LLTextureFetch::sCacheHitRate("texture_cache_hits", 128);
 LLStat LLTextureFetch::sCacheReadLatency("texture_cache_read_latency", 128);
 
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// Introduction
+//
+// This is an attempt to document what's going on in here after-the-fact.
+// It's a sincere attempt to be accurate but there will be mistakes.
+//
+//
+// Purpose
+//
+// What is this module trying to do?  It accepts requests to load textures
+// at a given priority and discard level and notifies the caller when done
+// (successfully or not).  Additional constraints are:
+//
+// * Support a local texture cache.  Don't hit network when possible
+//   to avoid it.
+// * Use UDP or HTTP as directed or as fallback.  HTTP is tried when
+//   not disabled and a URL is available.  UDP when a URL isn't
+//   available or HTTP attempts fail.
+// * Asynchronous (using threads).  Main thread is not to be blocked or
+//   burdened.
+// * High concurrency.  Many requests need to be in-flight and at various
+//   stages of completion.
+// * Tolerate frequent re-prioritizations of requests.  Priority is
+//   a reflection of a camera's viewpoint and as that viewpoint changes,
+//   objects and textures become more and less relevant and that is
+//   expressed at this level by priority changes and request cancelations.
+//
+// The caller interfaces that fall out of the above and shape the
+// implementation are:
+// * createRequest - Load j2c image via UDP or HTTP at given discard level and priority
+// * deleteRequest - Request removal of prior request
+// * getRequestFinished - Test if request is finished returning data to caller
+// * updateRequestPriority - Change priority of existing request
+// * getFetchState - Retrieve progress on existing request
+//
+// Everything else in here is mostly plumbing, metrics and debug.
+//
+//
+// The Work Queue
+//
+// The two central classes are LLTextureFetch and LLTextureFetchWorker.
+// LLTextureFetch combines threading with a priority queue of work
+// requests.  The priority queue is sorted by a U32 priority derived
+// from the F32 priority in the APIs.  The *only* work request that
+// receives service time by this thread is the highest priority
+// request.  All others wait until it is complete or a dynamic priority
+// change has re-ordered work.
+//
+// LLTextureFetchWorker implements the work request and is 1:1 with
+// texture fetch requests.  Embedded in each is a state machine that
+// walks it through the cache, HTTP, UDP, image decode and retry
+// steps of texture acquisition.
+//
+//
+// Threads
+//
+// Several threads are actively invoking code in this module.  They
+// include:
+//
+// 1.  Tmain    Main thread of execution
+// 2.  Ttf      LLTextureFetch's worker thread provided by LLQueuedThread
+// 3.  Tcurl    LLCurl's worker thread (should disappear over time)
+// 4.  Ttc      LLTextureCache's worker thread
+// 5.  Tid      Image decoder's worker thread
+// 6.  Thl      HTTP library's worker thread
+//
+//
+// Mutexes/Condition Variables
+//
+// 1.  Mt       Mutex defined for LLThread's condition variable (base class of
+//              LLTextureFetch)
+// 2.  Ct       Condition variable for LLThread and used by lock/unlockData().
+// 3.  Mwtd     Special LLWorkerThread mutex used for request deletion
+//              operations (base class of LLTextureFetch)
+// 4.  Mfq      LLTextureFetch's mutex covering request and command queue
+//              data.
+// 5.  Mfnq     LLTextureFetch's mutex covering udp and http request
+//              queue data.
+// 6.  Mwc      Mutex covering LLWorkerClass's members (base class of
+//              LLTextureFetchWorker).  One per request.
+// 7.  Mw       LLTextureFetchWorker's mutex.  One per request.
+//
+//
+// Lock Ordering Rules
+//
+// Not an exhaustive list but shows the order of lock acquisition
+// needed to prevent deadlocks.  'A < B' means acquire 'A' before
+// acquiring 'B'.
+//
+// 1.    Mw < Mfnq
+// (there are many more...)
+//
+//
+// Method and Member Definitions
+//
+// With the above, we'll try to document what threads can call what
+// methods (using T* for any), what locks must be held on entry and
+// are taken out during execution and what data is covered by which
+// lock (if any).  This latter category will be especially prone to
+// error so be skeptical.
+//
+// A line like:  "// Locks:  M<xxx>" indicates a method that must
+// be invoked by a caller holding the 'M<xxx>' lock.  Similarly,
+// "// Threads:  T<xxx>" means that a caller should be running in
+// the indicated thread.
+//
+// For data members, a trailing comment like "// M<xxx>" means that
+// the data member is covered by the specified lock.  Absence of a
+// comment can mean the member is unlocked or that I didn't bother
+// to do the archaeology.  In the case of LLTextureFetchWorker,
+// most data members added by the leaf class are actually covered
+// by the Mw lock.  You may also see "// T<xxx>" which means that
+// the member's usage is restricted to one thread (except for
+// perhaps construction and destruction) and so explicit locking
+// isn't used.
+//
+// In code, a trailing comment like "// [-+]M<xxx>" indicates a
+// lock acquision or release point.
+//
+//
+// Worker Lifecycle
+//
+// The threading and responder model makes it very likely that
+// other components are holding on to a pointer to a worker request.
+// So, uncoordinated deletions of requests is a guarantee of memory
+// corruption in a short time.  So destroying a request involves
+// invocations's of LLQueuedThread/LLWorkerThread's abort/stop
+// logic that removes workers and puts them ona delete queue for
+// 2-phase destruction.  That second phase is deferrable by calls
+// to deleteOK() which only allow final destruction (via dtor)
+// once deleteOK has determined that the request is in a safe
+// state.
+//
+//
+// Worker State Machine
+//
+// (ASCII art needed)
+//
+//
+// Priority Scheme
+//
+// [PRIORITY_LOW, PRIORITY_NORMAL)   - for WAIT_HTTP_RESOURCE state
+//									   and other wait states
+// [PRIORITY_HIGH, PRIORITY_URGENT)  - External event delivered,
+//                                     rapidly transitioning through states,
+//                                     no waiting allowed
+//
+// By itself, the above work queue model would fail the concurrency
+// and liveness requirements of the interface.  A high priority
+// request could find itself on the head and stalled for external
+// reasons (see VWR-28996).  So a few additional constraints are
+// required to keep things running:
+// * Anything that can make forward progress must be kept at a
+//   higher priority than anything that can't.
+// * On completion of external events, the associated request
+//   needs to be elevated beyond the normal range to handle
+//   any data delivery and release any external resource.
+//
+// This effort is made to keep higher-priority entities moving
+// forward in their state machines at every possible step of
+// processing.  It's not entirely proven that this produces the
+// experiencial benefits promised.
+//
+
+
 //////////////////////////////////////////////////////////////////////////////
-class LLTextureFetchWorker : public LLWorkerClass
+
+// Tuning/Parameterization Constants
+
+static const S32 HTTP_REQUESTS_IN_QUEUE_HIGH_WATER = 40;		// Maximum requests to have active in HTTP
+static const S32 HTTP_REQUESTS_IN_QUEUE_LOW_WATER = 20;			// Active level at which to refill
+
+
+//////////////////////////////////////////////////////////////////////////////
+
+class LLTextureFetchWorker : public LLWorkerClass, public LLCore::HttpHandler
+
 {
 	friend class LLTextureFetch;
-	friend class HTTPGetResponder;
 	friend class LLTextureFetchDebugger;
 	
 private:
 	class CacheReadResponder : public LLTextureCache::ReadResponder
 	{
 	public:
+
+		// Threads:  Ttf
 		CacheReadResponder(LLTextureFetch* fetcher, const LLUUID& id, LLImageFormatted* image)
 			: mFetcher(fetcher), mID(id)
 		{
 			setImage(image);
 		}
+
+		// Threads:  Ttc
 		virtual void completed(bool success)
 		{
 			LLTextureFetchWorker* worker = mFetcher->getWorker(mID);
@@ -92,10 +278,14 @@ private:
 	class CacheWriteResponder : public LLTextureCache::WriteResponder
 	{
 	public:
+
+		// Threads:  Ttf
 		CacheWriteResponder(LLTextureFetch* fetcher, const LLUUID& id)
 			: mFetcher(fetcher), mID(id)
 		{
 		}
+
+		// Threads:  Ttc
 		virtual void completed(bool success)
 		{
 			LLTextureFetchWorker* worker = mFetcher->getWorker(mID);
@@ -112,10 +302,14 @@ private:
 	class DecodeResponder : public LLImageDecodeThread::Responder
 	{
 	public:
+
+		// Threads:  Ttf
 		DecodeResponder(LLTextureFetch* fetcher, const LLUUID& id, LLTextureFetchWorker* worker)
 			: mFetcher(fetcher), mID(id), mWorker(worker)
 		{
 		}
+
+		// Threads:  Tid
 		virtual void completed(bool success, LLImageRaw* raw, LLImageRaw* aux)
 		{
 			LLTextureFetchWorker* worker = mFetcher->getWorker(mID);
@@ -148,22 +342,35 @@ private:
 	};
 	
 public:
+
+	// Threads:  Ttf
 	/*virtual*/ bool doWork(S32 param); // Called from LLWorkerThread::processRequest()
+
+	// Threads:  Ttf
 	/*virtual*/ void finishWork(S32 param, bool completed); // called from finishRequest() (WORK THREAD)
-	/*virtual*/ bool deleteOK(); // called from update() (WORK THREAD)
-	
+
+	// Threads:  Tmain
+	/*virtual*/ bool deleteOK(); // called from update()
+
 	~LLTextureFetchWorker();
-	// void relese() { --mActiveCount; }
 
-	S32 callbackHttpGet(const LLChannelDescriptors& channels,
-						 const LLIOPipe::buffer_ptr_t& buffer,
-						 bool partial, bool success);
+	// Threads:  Ttf
+	// Locks:  Mw
+	S32 callbackHttpGet(LLCore::HttpResponse * response,
+						bool partial, bool success);
+
+	// Threads:  Ttc
 	void callbackCacheRead(bool success, LLImageFormatted* image,
 						   S32 imagesize, BOOL islocal);
+
+	// Threads:  Ttc
 	void callbackCacheWrite(bool success);
+
+	// Threads:  Tid
 	void callbackDecoded(bool success, LLImageRaw* raw, LLImageRaw* aux);
 	
-	void setGetStatus(U32 status, const std::string& reason)
+	// Threads:  T*
+	void setGetStatus(LLCore::HttpStatus status, const std::string& reason)
 	{
 		LLMutexLock lock(&mWorkMutex);
 
@@ -175,35 +382,93 @@ public:
 	bool getCanUseHTTP() const { return mCanUseHTTP; }
 
 	LLTextureFetch & getFetcher() { return *mFetcher; }
+
+	// Inherited from LLCore::HttpHandler
+	// Threads:  Ttf
+	virtual void onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response);
 	
 protected:
 	LLTextureFetchWorker(LLTextureFetch* fetcher, const std::string& url, const LLUUID& id, const LLHost& host,
 						 F32 priority, S32 discard, S32 size);
 
 private:
+
+	// Threads:  Tmain
 	/*virtual*/ void startWork(S32 param); // called from addWork() (MAIN THREAD)
+
+	// Threads:  Tmain
 	/*virtual*/ void endWork(S32 param, bool aborted); // called from doWork() (MAIN THREAD)
 
+	// Locks:  Mw
 	void resetFormattedData();
 	
+	// Locks:  Mw
 	void setImagePriority(F32 priority);
+
+	// Locks:  Mw (ctor invokes without lock)
 	void setDesiredDiscard(S32 discard, S32 size);
+
+    // Threads:  T*
+	// Locks:  Mw
 	bool insertPacket(S32 index, U8* data, S32 size);
+
+	// Locks:  Mw
 	void clearPackets();
+
+	// Locks:  Mw
 	void setupPacketData();
+
+	// Locks:  Mw (ctor invokes without lock)
 	U32 calcWorkPriority();
+	
+	// Locks:  Mw
 	void removeFromCache();
+
+	// Threads:  Ttf
+	// Locks:  Mw
 	bool processSimulatorPackets();
+
+	// Threads:  Ttf
 	bool writeToCacheComplete();
 	
-	void removeFromHTTPQueue();
+	// Threads:  Ttf
+	void recordTextureStart(bool is_http);
+
+	// Threads:  Ttf
+	void recordTextureDone(bool is_http);
 
 	void lockWorkMutex() { mWorkMutex.lock(); }
 	void unlockWorkMutex() { mWorkMutex.unlock(); }
 
+	// Threads:  Ttf
+	// Locks:  Mw
+	bool acquireHttpSemaphore()
+		{
+			llassert(! mHttpHasResource);
+			if (mFetcher->mHttpSemaphore <= 0)
+			{
+				return false;
+			}
+			mHttpHasResource = true;
+			mFetcher->mHttpSemaphore--;
+			return true;
+		}
+
+	// Threads:  Ttf
+	// Locks:  Mw
+	void releaseHttpSemaphore()
+		{
+			llassert(mHttpHasResource);
+			mHttpHasResource = false;
+			mFetcher->mHttpSemaphore++;
+		}
+	
 private:
 	enum e_state // mState
 	{
+		// *NOTE:  Do not change the order/value of state variables, some code
+		// depends upon specific ordering/adjacency.
+		
 		// NOTE: Affects LLTextureBar::draw in lltextureview.cpp (debug hack)
 		INVALID = 0,
 		INIT,
@@ -211,8 +476,10 @@ private:
 		CACHE_POST,
 		LOAD_FROM_NETWORK,
 		LOAD_FROM_SIMULATOR,
-		SEND_HTTP_REQ,
-		WAIT_HTTP_REQ,
+		WAIT_HTTP_RESOURCE,				// Waiting for HTTP resources
+		WAIT_HTTP_RESOURCE2,			// Waiting for HTTP resources
+		SEND_HTTP_REQ,					// Commit to sending as HTTP
+		WAIT_HTTP_REQ,					// Request sent, wait for completion
 		DECODE_IMAGE,
 		DECODE_IMAGE_UPDATE,
 		WRITE_TO_CACHE,
@@ -256,9 +523,8 @@ private:
 	F32				mCacheReadTime;
 	LLTextureCache::handle_t mCacheReadHandle;
 	LLTextureCache::handle_t mCacheWriteHandle;
-	U8* mBuffer;
-	S32 mBufferSize;
 	S32 mRequestedSize;
+	S32 mRequestedOffset;
 	S32 mDesiredSize;
 	S32 mFileSize;
 	S32 mCachedSize;	
@@ -273,12 +539,9 @@ private:
 	BOOL mInCache;
 	bool mCanUseHTTP ;
 	bool mCanUseNET ; //can get from asset server.
-	S32 mHTTPFailCount;
 	S32 mRetryAttempt;
 	S32 mActiveCount;
-	U32 mGetStatus;
-	U32 mHTTPHandle;
-	F32 mDelay;
+	LLCore::HttpStatus mGetStatus;
 	std::string mGetReason;
 	
 	// Work Data
@@ -298,105 +561,19 @@ private:
 	U8 mImageCodec;
 
 	LLViewerAssetStats::duration_t mMetricsStartTime;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-
-class HTTPGetResponder : public LLCurl::Responder
-{
-	LOG_CLASS(HTTPGetResponder);
-public:
-	HTTPGetResponder(LLTextureFetch* fetcher, const LLUUID& id, U64 startTime, S32 requestedSize, U32 offset, bool redir)
-		: mFetcher(fetcher), mID(id), mStartTime(startTime), mRequestedSize(requestedSize), mOffset(offset), mFollowRedir(redir)
-	{
-	}
-	~HTTPGetResponder()
-	{
-	}
-
-	virtual void completedRaw(U32 status, const std::string& reason,
-							  const LLChannelDescriptors& channels,
-							  const LLIOPipe::buffer_ptr_t& buffer)
-	{
-		static LLCachedControl<bool> log_to_viewer_log(gSavedSettings,"LogTextureDownloadsToViewerLog");
-		static LLCachedControl<bool> log_to_sim(gSavedSettings,"LogTextureDownloadsToSimulator");
-		static LLCachedControl<bool> log_texture_traffic(gSavedSettings,"LogTextureNetworkTraffic") ;
 
-		if (log_to_viewer_log || log_to_sim)
-		{
-			mFetcher->mTextureInfo.setRequestStartTime(mID, mStartTime);
-			U64 timeNow = LLTimer::getTotalTime();
-			mFetcher->mTextureInfo.setRequestType(mID, LLTextureInfoDetails::REQUEST_TYPE_HTTP);
-			mFetcher->mTextureInfo.setRequestSize(mID, mRequestedSize);
-			mFetcher->mTextureInfo.setRequestOffset(mID, mOffset);
-			mFetcher->mTextureInfo.setRequestCompleteTimeAndLog(mID, timeNow);
-		}
-
-		S32 data_size = 0;
-		lldebugs << "HTTP COMPLETE: " << mID << llendl;
-		LLTextureFetchWorker* worker = mFetcher->getWorker(mID);
-		if (worker)
-		{
-			bool success = false;
-			bool partial = false;
-			if (HTTP_OK <= status &&  status < HTTP_MULTIPLE_CHOICES)
-			{
-				success = true;
-				if (HTTP_PARTIAL_CONTENT == status) // partial information
-				{
-					partial = true;
-				}
-			}
-
-			if (!success)
-			{
-				worker->setGetStatus(status, reason);
-// 				llwarns << "CURL GET FAILED, status:" << status << " reason:" << reason << llendl;
-			}
-			
-			data_size = worker->callbackHttpGet(channels, buffer, partial, success);
-			
-			if(log_texture_traffic && data_size > 0)
-			{
-				LLViewerTexture* tex = LLViewerTextureManager::findTexture(mID) ;
-				if(tex)
-				{
-					gTotalTextureBytesPerBoostLevel[tex->getBoostLevel()] += data_size ;
-				}
-			}
-		
-			if (worker->mMetricsStartTime)
-			{
-				LLViewerAssetStatsFF::record_response_thread1(LLViewerAssetType::AT_TEXTURE,
-															  true,
-															  LLImageBase::TYPE_AVATAR_BAKE == worker->mType,
-															  LLViewerAssetStatsFF::get_timestamp() - worker->mMetricsStartTime);
-				worker->mMetricsStartTime = 0;
-			}
-			LLViewerAssetStatsFF::record_dequeue_thread1(LLViewerAssetType::AT_TEXTURE,
-														 true,
-														 LLImageBase::TYPE_AVATAR_BAKE == worker->mType);
-		}
-		else
-		{
-			llwarns << "Worker not found: " << mID << llendl;
-		}
-
-		mFetcher->getCurlRequest().completeRequest(data_size);
-	}
-
-	virtual bool followRedir()
-	{
-		return mFollowRedir;
-	}
-	
-private:
-	LLTextureFetch* mFetcher;
-	LLUUID mID;
-	U64 mStartTime;
-	S32 mRequestedSize;
-	U32 mOffset;
-	bool mFollowRedir;
+	LLCore::HttpHandle		mHttpHandle;				// Handle of any active request
+	LLCore::BufferArray	*	mHttpBufferArray;			// Refcounted pointer to response data 
+	int						mHttpPolicyClass;
+	bool					mHttpActive;				// Active request to http library
+	unsigned int			mHttpReplySize;				// Actual received data size
+	unsigned int			mHttpReplyOffset;			// Actual received data offset
+	bool					mHttpHasResource;			// Counts against Fetcher's mHttpSemaphore
+
+	// State history
+	U32						mCacheReadCount;
+	U32						mCacheWriteCount;
+	U32						mResourceWaitCount;			// Requests entering WAIT_HTTP_RESOURCE2
 };
 
 //////////////////////////////////////////////////////////////////////////////
@@ -632,13 +809,15 @@ const char* LLTextureFetchWorker::sStateDescs[] = {
 	"CACHE_POST",
 	"LOAD_FROM_NETWORK",
 	"LOAD_FROM_SIMULATOR",
+	"WAIT_HTTP_RESOURCE",
+	"WAIT_HTTP_RESOURCE2",
 	"SEND_HTTP_REQ",
 	"WAIT_HTTP_REQ",
 	"DECODE_IMAGE",
 	"DECODE_IMAGE_UPDATE",
 	"WRITE_TO_CACHE",
 	"WAIT_ON_WRITE",
-	"DONE",
+	"DONE"
 };
 
 // static
@@ -654,6 +833,7 @@ LLTextureFetchWorker::LLTextureFetchWorker(LLTextureFetch* fetcher,
 										   S32 discard,			// Desired discard
 										   S32 size)			// Desired size
 	: LLWorkerClass(fetcher, "TextureFetch"),
+	  LLCore::HttpHandler(),
 	  mState(INIT),
 	  mWriteToCacheState(NOT_WRITE),
 	  mFetcher(fetcher),
@@ -671,9 +851,8 @@ LLTextureFetchWorker::LLTextureFetchWorker(LLTextureFetch* fetcher,
 	  mCacheReadTime(0.f),
 	  mCacheReadHandle(LLTextureCache::nullHandle()),
 	  mCacheWriteHandle(LLTextureCache::nullHandle()),
-	  mBuffer(NULL),
-	  mBufferSize(0),
 	  mRequestedSize(0),
+	  mRequestedOffset(0),
 	  mDesiredSize(TEXTURE_CACHE_ENTRY_SIZE),
 	  mFileSize(0),
 	  mCachedSize(0),
@@ -687,18 +866,24 @@ LLTextureFetchWorker::LLTextureFetchWorker(LLTextureFetch* fetcher,
 	  mInLocalCache(FALSE),
 	  mInCache(FALSE),
 	  mCanUseHTTP(true),
-	  mHTTPFailCount(0),
 	  mRetryAttempt(0),
 	  mActiveCount(0),
-	  mGetStatus(0),
 	  mWorkMutex(NULL),
 	  mFirstPacket(0),
 	  mLastPacket(-1),
 	  mTotalPackets(0),
 	  mImageCodec(IMG_CODEC_INVALID),
 	  mMetricsStartTime(0),
-	  mHTTPHandle(0),
-	  mDelay(-1.f)
+	  mHttpHandle(LLCORE_HTTP_HANDLE_INVALID),
+	  mHttpBufferArray(NULL),
+	  mHttpPolicyClass(mFetcher->mHttpPolicyClass),
+	  mHttpActive(false),
+	  mHttpReplySize(0U),
+	  mHttpReplyOffset(0U),
+	  mHttpHasResource(false),
+	  mCacheReadCount(0U),
+	  mCacheWriteCount(0U),
+	  mResourceWaitCount(0U)
 {
 	mCanUseNET = mUrl.empty() ;
 	
@@ -720,7 +905,20 @@ LLTextureFetchWorker::~LLTextureFetchWorker()
 // 			<< " Requested=" << mRequestedDiscard
 // 			<< " Desired=" << mDesiredDiscard << llendl;
 	llassert_always(!haveWork());
-	lockWorkMutex();
+
+	lockWorkMutex();													// +Mw (should be useless)
+	if (mHttpHasResource)
+	{
+		// Last-chance catchall to recover the resource.  Using an
+		// atomic datatype solely because this can be running in
+		// another thread.
+		releaseHttpSemaphore();
+	}
+	if (mHttpActive)
+	{
+		// Issue a cancel on a live request...
+		mFetcher->getHttpRequest().requestCancel(mHttpHandle, NULL);
+	}
 	if (mCacheReadHandle != LLTextureCache::nullHandle() && mFetcher->mTextureCache)
 	{
 		mFetcher->mTextureCache->readComplete(mCacheReadHandle, true);
@@ -731,22 +929,18 @@ LLTextureFetchWorker::~LLTextureFetchWorker()
 	}
 	mFormattedImage = NULL;
 	clearPackets();
-	unlockWorkMutex();
-	
-	removeFromHTTPQueue();
-}
-
-void LLTextureFetchWorker::removeFromHTTPQueue()
-{
-	if(mHTTPHandle > 0)
+	if (mHttpBufferArray)
 	{
-		llassert_always(mState == WAIT_HTTP_REQ);
-
-		mFetcher->getCurlRequest().removeRequest(mHTTPHandle);
-		mHTTPHandle = 0;
+		mHttpBufferArray->release();
+		mHttpBufferArray = NULL;
 	}
+	unlockWorkMutex();													// -Mw
+	mFetcher->removeFromHTTPQueue(mID, 0);
+	mFetcher->removeHttpWaiter(mID);
+	mFetcher->updateStateStats(mCacheReadCount, mCacheWriteCount, mResourceWaitCount);
 }
 
+// Locks:  Mw
 void LLTextureFetchWorker::clearPackets()
 {
 	for_each(mPackets.begin(), mPackets.end(), DeletePointer());
@@ -756,6 +950,7 @@ void LLTextureFetchWorker::clearPackets()
 	mFirstPacket = 0;
 }
 
+// Locks:  Mw
 void LLTextureFetchWorker::setupPacketData()
 {
 	S32 data_size = 0;
@@ -788,6 +983,7 @@ void LLTextureFetchWorker::setupPacketData()
 	}
 }
 
+// Locks:  Mw (ctor invokes without lock)
 U32 LLTextureFetchWorker::calcWorkPriority()
 {
  	//llassert_always(mImagePriority >= 0 && mImagePriority <= LLViewerFetchedTexture::maxDecodePriority());
@@ -797,7 +993,7 @@ U32 LLTextureFetchWorker::calcWorkPriority()
 	return mWorkPriority;
 }
 
-// mWorkMutex is locked
+// Locks:  Mw (ctor invokes without lock)
 void LLTextureFetchWorker::setDesiredDiscard(S32 discard, S32 size)
 {
 	bool prioritize = false;
@@ -833,6 +1029,7 @@ void LLTextureFetchWorker::setDesiredDiscard(S32 discard, S32 size)
 	}
 }
 
+// Locks:  Mw
 void LLTextureFetchWorker::setImagePriority(F32 priority)
 {
 // 	llassert_always(priority >= 0 && priority <= LLViewerTexture::maxDecodePriority());
@@ -842,35 +1039,41 @@ void LLTextureFetchWorker::setImagePriority(F32 priority)
 		mImagePriority = priority;
 		calcWorkPriority();
 		U32 work_priority = mWorkPriority | (getPriority() & LLWorkerThread::PRIORITY_HIGHBITS);
-		mFetcher->getCurlRequest().updatePriority(mHTTPHandle, mWorkPriority);
 		setPriority(work_priority);
 	}
 }
 
+// Locks:  Mw
 void LLTextureFetchWorker::resetFormattedData()
 {
-	FREE_MEM(LLImageBase::getPrivatePool(), mBuffer);
-	mBuffer = NULL;
-	mBufferSize = 0;
+	if (mHttpBufferArray)
+	{
+		mHttpBufferArray->release();
+		mHttpBufferArray = NULL;
+	}
 	if (mFormattedImage.notNull())
 	{
 		mFormattedImage->deleteData();
 	}
+	mHttpReplySize = 0;
+	mHttpReplyOffset = 0;
 	mHaveAllData = FALSE;
 }
 
-// Called from MAIN thread
+// Threads:  Tmain
 void LLTextureFetchWorker::startWork(S32 param)
 {
 	llassert(mFormattedImage.isNull());
 }
 
-#include "llviewertexturelist.h" // debug
-
-// Called from LLWorkerThread::processRequest()
+// Threads:  Ttf
 bool LLTextureFetchWorker::doWork(S32 param)
 {
-	LLMutexLock lock(&mWorkMutex);
+	static const LLCore::HttpStatus http_not_found(HTTP_NOT_FOUND);						// 404
+	static const LLCore::HttpStatus http_service_unavail(HTTP_SERVICE_UNAVAILABLE);		// 503
+	static const LLCore::HttpStatus http_not_sat(HTTP_REQUESTED_RANGE_NOT_SATISFIABLE);	// 416;
+	
+	LLMutexLock lock(&mWorkMutex);										// +Mw
 
 	if ((mFetcher->isQuitting() || getFlags(LLWorkerClass::WCF_DELETE_REQUESTED)))
 	{
@@ -914,22 +1117,26 @@ bool LLTextureFetchWorker::doWork(S32 param)
 		mLoadedDiscard = -1;
 		mDecodedDiscard = -1;
 		mRequestedSize = 0;
+		mRequestedOffset = 0;
 		mFileSize = 0;
 		mCachedSize = 0;
 		mLoaded = FALSE;
 		mSentRequest = UNSENT;
 		mDecoded  = FALSE;
 		mWritten  = FALSE;
-		FREE_MEM(LLImageBase::getPrivatePool(), mBuffer);
-		mBuffer = NULL;
-		mBufferSize = 0;
+		if (mHttpBufferArray)
+		{
+			mHttpBufferArray->release();
+			mHttpBufferArray = NULL;
+		}
+		mHttpReplySize = 0;
+		mHttpReplyOffset = 0;
 		mHaveAllData = FALSE;
 		clearPackets(); // TODO: Shouldn't be necessary
 		mCacheReadHandle = LLTextureCache::nullHandle();
 		mCacheWriteHandle = LLTextureCache::nullHandle();
 		mState = LOAD_FROM_TEXTURE_CACHE;
 		mInCache = FALSE;
-		mDelay = -1.f;
 		mDesiredSize = llmax(mDesiredSize, TEXTURE_CACHE_ENTRY_SIZE); // min desired size is TEXTURE_CACHE_ENTRY_SIZE
 		LL_DEBUGS("Texture") << mID << ": Priority: " << llformat("%8.0f",mImagePriority)
 							 << " Desired Discard: " << mDesiredDiscard << " Desired Size: " << mDesiredSize << LL_ENDL;
@@ -945,7 +1152,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			S32 size = mDesiredSize - offset;
 			if (size <= 0)
 			{
-				mState = CACHE_POST; //have enough data, will fall to decode
+				mState = CACHE_POST;
 				return false;
 			}
 			mFileSize = 0;
@@ -956,6 +1163,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 				setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority); // Set priority first since Responder may change it
 
 				// read file from local disk
+				++mCacheReadCount;
 				std::string filename = mUrl.substr(7, std::string::npos);
 				CacheReadResponder* responder = new CacheReadResponder(mFetcher, mID, mFormattedImage);
 				mCacheReadHandle = mFetcher->mTextureCache->readFromCache(filename, mID, cache_priority,
@@ -966,6 +1174,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			{
 				setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority); // Set priority first since Responder may change it
 
+				++mCacheReadCount;
 				CacheReadResponder* responder = new CacheReadResponder(mFetcher, mID, mFormattedImage);
 				mCacheReadHandle = mFetcher->mTextureCache->readFromCache(mID, cache_priority,
 																		  offset, size, responder);
@@ -979,7 +1188,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 					llwarns << "Unknown URL Type: " << mUrl << llendl;
 				}
 				setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
-				mState = SEND_HTTP_REQ;
+				mState = WAIT_HTTP_RESOURCE;
 			}
 			else
 			{
@@ -1082,7 +1291,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 		}
 		if (mCanUseHTTP && !mUrl.empty())
 		{
-			mState = SEND_HTTP_REQ;
+			mState = WAIT_HTTP_RESOURCE;
 			setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
 			if(mWriteToCacheState != NOT_WRITE)
 			{
@@ -1099,13 +1308,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			mRequestedDiscard = mDesiredDiscard;
 			mSentRequest = QUEUED;
 			mFetcher->addToNetworkQueue(this);
-			if (! mMetricsStartTime)
-			{
-				mMetricsStartTime = LLViewerAssetStatsFF::get_timestamp();
-			}
-			LLViewerAssetStatsFF::record_enqueue_thread1(LLViewerAssetType::AT_TEXTURE,
-														 false,
-														 LLImageBase::TYPE_AVATAR_BAKE == mType);
+			recordTextureStart(false);
 			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			
 			return false;
@@ -1116,12 +1319,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			//llassert_always(mFetcher->mNetworkQueue.find(mID) != mFetcher->mNetworkQueue.end());
 			// Make certain this is in the network queue
 			//mFetcher->addToNetworkQueue(this);
-			//if (! mMetricsStartTime)
-			//{
-			//   mMetricsStartTime = LLViewerAssetStatsFF::get_timestamp();
-			//}
-			//LLViewerAssetStatsFF::record_enqueue_thread1(LLViewerAssetType::AT_TEXTURE, false,
-			//                                             LLImageBase::TYPE_AVATAR_BAKE == mType);
+			//recordTextureStart(false);
 			//setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			return false;
 		}
@@ -1146,193 +1344,201 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
 			mState = DECODE_IMAGE;
 			mWriteToCacheState = SHOULD_WRITE;
-
-			if (mMetricsStartTime)
-			{
-				LLViewerAssetStatsFF::record_response_thread1(LLViewerAssetType::AT_TEXTURE,
-															  false,
-															  LLImageBase::TYPE_AVATAR_BAKE == mType,
-															  LLViewerAssetStatsFF::get_timestamp() - mMetricsStartTime);
-				mMetricsStartTime = 0;
-			}
-			LLViewerAssetStatsFF::record_dequeue_thread1(LLViewerAssetType::AT_TEXTURE,
-														 false,
-														 LLImageBase::TYPE_AVATAR_BAKE == mType);
+			recordTextureDone(false);
 		}
 		else
 		{
 			mFetcher->addToNetworkQueue(this); // failsafe
-			if (! mMetricsStartTime)
-			{
-				mMetricsStartTime = LLViewerAssetStatsFF::get_timestamp();
-			}
-			LLViewerAssetStatsFF::record_enqueue_thread1(LLViewerAssetType::AT_TEXTURE,
-														 false,
-														 LLImageBase::TYPE_AVATAR_BAKE == mType);
 			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
+			recordTextureStart(false);
+		}
+		return false;
+	}
+	
+	if (mState == WAIT_HTTP_RESOURCE)
+	{
+		// NOTE:
+		// control the number of the http requests issued for:
+		// 1, not openning too many file descriptors at the same time;
+		// 2, control the traffic of http so udp gets bandwidth.
+		//
+		// If it looks like we're busy, keep this request here.
+		// Otherwise, advance into the HTTP states.
+		if (mFetcher->getHttpWaitersCount() || ! acquireHttpSemaphore())
+		{
+			mState = WAIT_HTTP_RESOURCE2;
+			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
+			mFetcher->addHttpWaiter(this->mID);
+			++mResourceWaitCount;
+			return false;
 		}
+		
+		mState = SEND_HTTP_REQ;
+		// *NOTE:  You must invoke releaseHttpSemaphore() if you transition
+		// to a state other than SEND_HTTP_REQ or WAIT_HTTP_REQ or abort
+		// the request.
+	}
+
+	if (mState == WAIT_HTTP_RESOURCE2)
+	{
+		// Just idle it if we make it to the head...
 		return false;
 	}
 	
 	if (mState == SEND_HTTP_REQ)
 	{
-		if(mCanUseHTTP)
+		if (! mCanUseHTTP)
 		{
-			mFetcher->removeFromNetworkQueue(this, false);
+			releaseHttpSemaphore();
+			return true; // abort
+		}
+
+		mFetcher->removeFromNetworkQueue(this, false);
 			
-			S32 cur_size = 0;
-			if (mFormattedImage.notNull())
+		S32 cur_size = 0;
+		if (mFormattedImage.notNull())
+		{
+			cur_size = mFormattedImage->getDataSize(); // amount of data we already have
+			if (mFormattedImage->getDiscardLevel() == 0)
 			{
-				cur_size = mFormattedImage->getDataSize(); // amount of data we already have
-				if (mFormattedImage->getDiscardLevel() == 0)
+				if (cur_size > 0)
 				{
-					if(cur_size > 0)
-					{
-						// We already have all the data, just decode it
-						mLoadedDiscard = mFormattedImage->getDiscardLevel();
-						setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
-						mState = DECODE_IMAGE;
-						return false;
-					}
-					else
-					{
-						return true ; //abort.
-					}
-				}
-			}
-			mRequestedSize = mDesiredSize;
-			mRequestedDiscard = mDesiredDiscard;
-			mRequestedSize -= cur_size;
-			S32 offset = cur_size;
-			mBufferSize = cur_size; // This will get modified by callbackHttpGet()
-			
-			bool res = false;
-			if (!mUrl.empty())
-			{
-				mRequestedTimer.reset();
-
-				mLoaded = FALSE;
-				mGetStatus = 0;
-				mGetReason.clear();
-				LL_DEBUGS("Texture") << "HTTP GET: " << mID << " Offset: " << offset
-									 << " Bytes: " << mRequestedSize
-									 << " Bandwidth(kbps): " << mFetcher->getTextureBandwidth() << "/" << mFetcher->mMaxBandwidth
-									 << LL_ENDL;
-				setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
-				mState = WAIT_HTTP_REQ;	
-
-				if (! mMetricsStartTime)
-				{
-					mMetricsStartTime = LLViewerAssetStatsFF::get_timestamp();
+					// We already have all the data, just decode it
+					mLoadedDiscard = mFormattedImage->getDiscardLevel();
+					setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
+					mState = DECODE_IMAGE;
+					releaseHttpSemaphore();
+					return false;
 				}
-				LLViewerAssetStatsFF::record_enqueue_thread1(LLViewerAssetType::AT_TEXTURE,
-															 true,
-															 LLImageBase::TYPE_AVATAR_BAKE == mType);
-
-				// Will call callbackHttpGet when curl request completes
-				std::vector<std::string> headers;
-				headers.push_back("Accept: image/x-j2c");
-				// If we try to fetch the whole file, we set the size to 0 so that we generate the correct curl range request
-				// Note: it looks a bit hacky but we need to limit this (size==0) to mean "whole file" to HTTP only as it messes up UDP fetching
-				if ((offset+mRequestedSize) == MAX_IMAGE_DATA_SIZE)
+				else
 				{
-					mRequestedSize = 0;
+					releaseHttpSemaphore();
+					return true; // abort.
 				}
-				mHTTPHandle = mFetcher->mCurlGetRequest->getByteRange(mUrl, headers, offset, mRequestedSize, mWorkPriority,
-															  new HTTPGetResponder(mFetcher, mID, LLTimer::getTotalTime(), mRequestedSize, offset, true), mDelay);
-				mDelay = -1.f; //reset
-				res = true;
 			}
-			if (!res)
-			{
-				llwarns << "HTTP GET request failed for " << mID << llendl;
-				resetFormattedData();
-				++mHTTPFailCount;
-				return true; // failed
-			}
-			// fall through
 		}
-		else //can not use http fetch.
+		mRequestedSize = mDesiredSize;
+		mRequestedDiscard = mDesiredDiscard;
+		mRequestedSize -= cur_size;
+		mRequestedOffset = cur_size;
+		if (mRequestedOffset)
 		{
-			return true ; //abort
+			// Texture fetching often issues 'speculative' loads that
+			// start beyond the end of the actual asset.  Some cache/web
+			// systems, e.g. Varnish, will respond to this not with a
+			// 416 but with a 200 and the entire asset in the response
+			// body.  By ensuring that we always have a partially
+			// satisfiable Range request, we avoid that hit to the network.
+			// We just have to deal with the overlapping data which is made
+			// somewhat harder by the fact that grid services don't necessarily
+			// return the Content-Range header on 206 responses.  *Sigh*
+			mRequestedOffset -= 1;
+			mRequestedSize += 1;
+		}
+		
+		mHttpHandle = LLCORE_HTTP_HANDLE_INVALID;
+		if (!mUrl.empty())
+		{
+			mRequestedTimer.reset();
+			mLoaded = FALSE;
+			mGetStatus = LLCore::HttpStatus();
+			mGetReason.clear();
+			LL_DEBUGS("Texture") << "HTTP GET: " << mID << " Offset: " << mRequestedOffset
+								 << " Bytes: " << mRequestedSize
+								 << " Bandwidth(kbps): " << mFetcher->getTextureBandwidth() << "/" << mFetcher->mMaxBandwidth
+								 << LL_ENDL;
+
+			// Will call callbackHttpGet when curl request completes
+			mHttpHandle = mFetcher->mHttpRequest->requestGetByteRange(mHttpPolicyClass,
+																	  mWorkPriority,
+																	  mUrl,
+																	  mRequestedOffset,
+																	  mRequestedSize,
+																	  mFetcher->mHttpOptions,
+																	  mFetcher->mHttpHeaders,
+																	  this);
+		}
+		if (LLCORE_HTTP_HANDLE_INVALID == mHttpHandle)
+		{
+			llwarns << "HTTP GET request failed for " << mID << llendl;
+			resetFormattedData();
+			releaseHttpSemaphore();
+			return true; // failed
 		}
+
+		mHttpActive = true;
+		mFetcher->addToHTTPQueue(mID);
+		recordTextureStart(true);
+		setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
+		mState = WAIT_HTTP_REQ;	
+		
+		// fall through
 	}
 	
 	if (mState == WAIT_HTTP_REQ)
 	{
+		// *NOTE:  As stated above, all transitions out of this state should
+		// call releaseHttpSemaphore().
 		if (mLoaded)
 		{
 			S32 cur_size = mFormattedImage.notNull() ? mFormattedImage->getDataSize() : 0;
 			if (mRequestedSize < 0)
 			{
-				S32 max_attempts;
-				if (mGetStatus == HTTP_NOT_FOUND)
+				if (http_not_found == mGetStatus)
 				{
 					if(mWriteToCacheState == NOT_WRITE) //map tiles
 					{
 						mState = DONE;
+						releaseHttpSemaphore();
 						return true; // failed, means no map tile on the empty region.
 					}
 
-					mHTTPFailCount = max_attempts = 1; // Don't retry
 					llwarns << "Texture missing from server (404): " << mUrl << llendl;
 
-					//roll back to try UDP
-					if(mCanUseNET)
+					// roll back to try UDP
+					if (mCanUseNET)
 					{
-						mState = INIT ;
-						mCanUseHTTP = false ;
+						mState = INIT;
+						mCanUseHTTP = false;
 						mUrl.clear();
 						setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
-						return false ;
+						releaseHttpSemaphore();
+						return false;
 					}
 				}
-				else if (mGetStatus == HTTP_SERVICE_UNAVAILABLE)
+				else if (http_service_unavail == mGetStatus)
 				{
-					// *TODO: Should probably introduce a timer here to delay future HTTP requsts
-					// for a short time (~1s) to ease server load? Ideally the server would queue
-					// requests instead of returning 503... we already limit the number pending.
-					++mHTTPFailCount;
-					max_attempts = mHTTPFailCount+1; // Keep retrying
 					LL_INFOS_ONCE("Texture") << "Texture server busy (503): " << mUrl << LL_ENDL;
-					mDelay = 2.0f; //delay 2 second to re-issue the http request
+				}
+				else if (http_not_sat == mGetStatus)
+				{
+					// Allowed, we'll accept whatever data we have as complete.
+					mHaveAllData = TRUE;
 				}
 				else
 				{
-					const S32 HTTP_MAX_RETRY_COUNT = 3;
-					max_attempts = HTTP_MAX_RETRY_COUNT + 1;
-					++mHTTPFailCount;
-					mDelay = 2.0f; //delay 2 second to re-issue the http request
-
 					llinfos << "HTTP GET failed for: " << mUrl
-							<< " Status: " << mGetStatus << " Reason: '" << mGetReason << "'"
-							<< " Attempt:" << mHTTPFailCount+1 << "/" << max_attempts << llendl;
+							<< " Status: " << mGetStatus.toHex()
+							<< " Reason: '" << mGetReason << "'"
+							<< llendl;
 				}
 
-				if (mHTTPFailCount >= max_attempts)
-				{
-					mUrl.clear();
-					if (cur_size > 0)
-					{
-						// Use available data
-						mLoadedDiscard = mFormattedImage->getDiscardLevel();
-						setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
-						mState = DECODE_IMAGE;
-						return false; 
-					}
-					else
-					{
-						resetFormattedData();
-						mState = DONE;
-						return true; // failed
-					}
-				}
-				else
+				mUrl.clear();
+				if (cur_size > 0)
 				{
+					// Use available data
+					mLoadedDiscard = mFormattedImage->getDiscardLevel();
 					setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
-					mState = SEND_HTTP_REQ;
-					return false; // retry
+					mState = DECODE_IMAGE;
+					releaseHttpSemaphore();
+					return false; 
 				}
+
+				// Fail harder
+				resetFormattedData();
+				mState = DONE;
+				releaseHttpSemaphore();
+				return true; // failed
 			}
 			
 			// Clear the url since we're done with the fetch
@@ -1342,18 +1548,46 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			{
 				mUrl.clear();
 			}
-
-			llassert_always(mBufferSize == cur_size + mRequestedSize);
-			if(!mBufferSize)//no data received.
+			
+			if (! mHttpBufferArray || ! mHttpBufferArray->size())
 			{
-				FREE_MEM(LLImageBase::getPrivatePool(), mBuffer); 
-				mBuffer = NULL;
+				// no data received.
+				if (mHttpBufferArray)
+				{
+					mHttpBufferArray->release();
+					mHttpBufferArray = NULL;
+				}
 
-				//abort.
+				// abort.
 				mState = DONE;
+				releaseHttpSemaphore();
 				return true;
 			}
 
+			S32 append_size(mHttpBufferArray->size());
+			S32 total_size(cur_size + append_size);
+			S32 src_offset(0);
+			llassert_always(append_size == mRequestedSize);
+			if (mHttpReplyOffset && mHttpReplyOffset != cur_size)
+			{
+				// In case of a partial response, our offset may
+				// not be trivially contiguous with the data we have.
+				// Get back into alignment.
+				if (mHttpReplyOffset > cur_size)
+				{
+					LL_WARNS("Texture") << "Partial HTTP response produces break in image data for texture "
+										<< mID << ".  Aborting load."  << LL_ENDL;
+					mState = DONE;
+					releaseHttpSemaphore();
+					return true;
+				}
+				src_offset = cur_size - mHttpReplyOffset;
+				append_size -= src_offset;
+				total_size -= src_offset;
+				mRequestedSize -= src_offset;			// Make requested values reflect useful part
+				mRequestedOffset += src_offset;
+			}
+			
 			if (mFormattedImage.isNull())
 			{
 				// For now, create formatted image based on extension
@@ -1365,41 +1599,50 @@ bool LLTextureFetchWorker::doWork(S32 param)
 				}
 			}
 						
-			if (mHaveAllData && mRequestedDiscard == 0) //the image file is fully loaded.
+			if (mHaveAllData) //the image file is fully loaded.
 			{
-				mFileSize = mBufferSize;
+				mFileSize = total_size;
 			}
 			else //the file size is unknown.
 			{
-				mFileSize = mBufferSize + 1 ; //flag the file is not fully loaded.
+				mFileSize = total_size + 1 ; //flag the file is not fully loaded.
 			}
 			
-			U8* buffer = (U8*)ALLOCATE_MEM(LLImageBase::getPrivatePool(), mBufferSize);
+			U8 * buffer = (U8 *) ALLOCATE_MEM(LLImageBase::getPrivatePool(), total_size);
 			if (cur_size > 0)
 			{
 				memcpy(buffer, mFormattedImage->getData(), cur_size);
 			}
-			memcpy(buffer + cur_size, mBuffer, mRequestedSize); // append
+			mHttpBufferArray->read(src_offset, (char *) buffer + cur_size, append_size);
+
 			// NOTE: setData releases current data and owns new data (buffer)
-			mFormattedImage->setData(buffer, mBufferSize);
-			// delete temp data
-			FREE_MEM(LLImageBase::getPrivatePool(), mBuffer); // Note: not 'buffer' (assigned in setData())
-			mBuffer = NULL;
-			mBufferSize = 0;
+			mFormattedImage->setData(buffer, total_size);
+
+			// Done with buffer array
+			mHttpBufferArray->release();
+			mHttpBufferArray = NULL;
+			mHttpReplySize = 0;
+			mHttpReplyOffset = 0;
+			
 			mLoadedDiscard = mRequestedDiscard;
 			mState = DECODE_IMAGE;
-			if(mWriteToCacheState != NOT_WRITE)
+			if (mWriteToCacheState != NOT_WRITE)
 			{
 				mWriteToCacheState = SHOULD_WRITE ;
 			}
 			setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
+			releaseHttpSemaphore();
 			return false;
 		}
 		else
 		{
-			//
-			//No need to timeout, the responder should be triggered automatically.
-			//
+			// *HISTORY:  There was a texture timeout test here originally that
+			// would cancel a request that was over 120 seconds old.  That's
+			// probably not a good idea.  Particularly rich regions can take
+			// an enormous amount of time to load textures.  We'll revisit the
+			// various possible timeout components (total request time, connection
+			// time, I/O time, with and without retries, etc.) in the future.
+
 			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			return false;
 		}
@@ -1408,11 +1651,12 @@ bool LLTextureFetchWorker::doWork(S32 param)
 	if (mState == DECODE_IMAGE)
 	{
 		static LLCachedControl<bool> textures_decode_disabled(gSavedSettings,"TextureDecodeDisabled");
-		if(textures_decode_disabled)
+
+		setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority); // Set priority first since Responder may change it
+		if (textures_decode_disabled)
 		{
 			// for debug use, don't decode
 			mState = DONE;
-			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			return true;
 		}
 
@@ -1420,7 +1664,6 @@ bool LLTextureFetchWorker::doWork(S32 param)
 		{
 			// We aborted, don't decode
 			mState = DONE;
-			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			return true;
 		}
 		
@@ -1430,7 +1673,6 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			
 			//abort, don't decode
 			mState = DONE;
-			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			return true;
 		}
 		if (mLoadedDiscard < 0)
@@ -1439,10 +1681,9 @@ bool LLTextureFetchWorker::doWork(S32 param)
 
 			//abort, don't decode
 			mState = DONE;
-			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			return true;
 		}
-		setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority); // Set priority first since Responder may change it
+
 		mRawImage = NULL;
 		mAuxImage = NULL;
 		llassert_always(mFormattedImage.notNull());
@@ -1528,6 +1769,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 		U32 cache_priority = mWorkPriority;
 		mWritten = FALSE;
 		mState = WAIT_ON_WRITE;
+		++mCacheWriteCount;
 		CacheWriteResponder* responder = new CacheWriteResponder(mFetcher, mID);
 		mCacheWriteHandle = mFetcher->mTextureCache->writeToCache(mID, cache_priority,
 																  mFormattedImage->getData(), datasize,
@@ -1572,9 +1814,84 @@ bool LLTextureFetchWorker::doWork(S32 param)
 	}
 	
 	return false;
-}
+}																		// -Mw
+
+// Threads:  Ttf
+// virtual
+void LLTextureFetchWorker::onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response)
+{
+	static LLCachedControl<bool> log_to_viewer_log(gSavedSettings, "LogTextureDownloadsToViewerLog");
+	static LLCachedControl<bool> log_to_sim(gSavedSettings, "LogTextureDownloadsToSimulator");
+	static LLCachedControl<bool> log_texture_traffic(gSavedSettings, "LogTextureNetworkTraffic") ;
 
-// Called from MAIN thread
+	LLMutexLock lock(&mWorkMutex);										// +Mw
+
+	mHttpActive = false;
+	
+	if (log_to_viewer_log || log_to_sim)
+	{
+		U64 timeNow = LLTimer::getTotalTime();
+		mFetcher->mTextureInfo.setRequestStartTime(mID, mMetricsStartTime);
+		mFetcher->mTextureInfo.setRequestType(mID, LLTextureInfoDetails::REQUEST_TYPE_HTTP);
+		mFetcher->mTextureInfo.setRequestSize(mID, mRequestedSize);
+		mFetcher->mTextureInfo.setRequestOffset(mID, mRequestedOffset);
+		mFetcher->mTextureInfo.setRequestCompleteTimeAndLog(mID, timeNow);
+	}
+
+	bool success = true;
+	bool partial = false;
+	LLCore::HttpStatus status(response->getStatus());
+	
+	lldebugs << "HTTP COMPLETE: " << mID
+			 << " status: " << status.toHex()
+			 << " '" << status.toString() << "'"
+			 << llendl;
+//	unsigned int offset(0), length(0), full_length(0);
+//	response->getRange(&offset, &length, &full_length);
+// 	llwarns << "HTTP COMPLETE: " << mID << " handle: " << handle
+// 			<< " status: " << status.toULong() << " '" << status.toString() << "'"
+// 			<< " req offset: " << mRequestedOffset << " req length: " << mRequestedSize
+// 			<< " offset: " << offset << " length: " << length
+// 			<< llendl;
+
+	if (! status)
+	{
+		success = false;
+		std::string reason(status.toString());
+		setGetStatus(status, reason);
+		llwarns << "CURL GET FAILED, status: " << status.toHex()
+				<< " reason: " << reason << llendl;
+	}
+	else
+	{
+		// A warning about partial (HTTP 206) data.  Some grid services
+		// do *not* return a 'Content-Range' header in the response to
+		// Range requests with a 206 status.  We're forced to assume
+		// we get what we asked for in these cases until we can fix
+		// the services.
+		static const LLCore::HttpStatus par_status(HTTP_PARTIAL_CONTENT);
+
+		partial = (par_status == status);
+	}
+	
+	S32 data_size = callbackHttpGet(response, partial, success);
+			
+	if (log_texture_traffic && data_size > 0)
+	{
+		LLViewerTexture* tex = LLViewerTextureManager::findTexture(mID);
+		if (tex)
+		{
+			gTotalTextureBytesPerBoostLevel[tex->getBoostLevel()] += data_size ;
+		}
+	}
+
+	mFetcher->removeFromHTTPQueue(mID, data_size);
+	
+	recordTextureDone(true);
+}																		// -Mw
+
+
+// Threads:  Tmain
 void LLTextureFetchWorker::endWork(S32 param, bool aborted)
 {
 	if (mDecodeHandle != 0)
@@ -1587,6 +1904,8 @@ void LLTextureFetchWorker::endWork(S32 param, bool aborted)
 
 //////////////////////////////////////////////////////////////////////////////
 
+// Threads:  Ttf
+
 // virtual
 void LLTextureFetchWorker::finishWork(S32 param, bool completed)
 {
@@ -1603,10 +1922,37 @@ void LLTextureFetchWorker::finishWork(S32 param, bool completed)
 	}
 }
 
+// LLQueuedThread's update() method is asking if it's okay to
+// delete this worker.  You'll notice we're not locking in here
+// which is a slight concern.  Caller is expected to have made
+// this request 'quiet' by whatever means... 
+//
+// Threads:  Tmain
+
 // virtual
 bool LLTextureFetchWorker::deleteOK()
 {
 	bool delete_ok = true;
+
+	if (mHttpActive)
+	{
+		// HTTP library has a pointer to this worker
+		// and will dereference it to do notification.
+		delete_ok = false;
+	}
+
+	if (WAIT_HTTP_RESOURCE2 == mState)
+	{
+		if (mFetcher->isHttpWaiter(mID))
+		{
+			// Don't delete the worker out from under the releaseHttpWaiters()
+			// method.  Keep the pointers valid, clean up after that method
+			// has recognized the cancelation and removed the UUID from the
+			// waiter list.
+			delete_ok = false;
+		}
+	}
+	
 	// Allow any pending reads or writes to complete
 	if (mCacheReadHandle != LLTextureCache::nullHandle())
 	{
@@ -1641,6 +1987,7 @@ bool LLTextureFetchWorker::deleteOK()
 	return delete_ok;
 }
 
+// Threads:  Ttf
 void LLTextureFetchWorker::removeFromCache()
 {
 	if (!mInLocalCache)
@@ -1652,6 +1999,8 @@ void LLTextureFetchWorker::removeFromCache()
 
 //////////////////////////////////////////////////////////////////////////////
 
+// Threads:  Ttf
+// Locks:  Mw
 bool LLTextureFetchWorker::processSimulatorPackets()
 {
 	if (mFormattedImage.isNull() || mRequestedSize < 0)
@@ -1712,14 +2061,13 @@ bool LLTextureFetchWorker::processSimulatorPackets()
 
 //////////////////////////////////////////////////////////////////////////////
 
-S32 LLTextureFetchWorker::callbackHttpGet(const LLChannelDescriptors& channels,
-										   const LLIOPipe::buffer_ptr_t& buffer,
-										   bool partial, bool success)
+// Threads:  Ttf
+// Locks:  Mw
+S32 LLTextureFetchWorker::callbackHttpGet(LLCore::HttpResponse * response,
+										  bool partial, bool success)
 {
 	S32 data_size = 0 ;
 
-	LLMutexLock lock(&mWorkMutex);
-	mHTTPHandle = 0;
 	if (mState != WAIT_HTTP_REQ)
 	{
 		llwarns << "callbackHttpGet for unrequested fetch worker: " << mID
@@ -1734,27 +2082,68 @@ S32 LLTextureFetchWorker::callbackHttpGet(const LLChannelDescriptors& channels,
 	if (success)
 	{
 		// get length of stream:
-		data_size = buffer->countAfter(channels.in(), NULL);		
-	
+		LLCore::BufferArray * body(response->getBody());
+		data_size = body ? body->size() : 0;
+
 		LL_DEBUGS("Texture") << "HTTP RECEIVED: " << mID.asString() << " Bytes: " << data_size << LL_ENDL;
 		if (data_size > 0)
 		{
 			// *TODO: set the formatted image data here directly to avoid the copy
-			mBuffer = (U8*)ALLOCATE_MEM(LLImageBase::getPrivatePool(), data_size);
-			buffer->readAfter(channels.in(), NULL, mBuffer, data_size);
-			mBufferSize += data_size;
-			if (mRequestedSize == 0)
+
+			// Hold on to body for later copy
+			llassert_always(NULL == mHttpBufferArray);
+			body->addRef();
+			mHttpBufferArray = body;
+
+			if (partial)
+			{
+				unsigned int offset(0), length(0), full_length(0);
+				response->getRange(&offset, &length, &full_length);
+				if (! offset && ! length)
+				{
+					// This is the case where we receive a 206 status but
+					// there wasn't a useful Content-Range header in the response.
+					// This could be because it was badly formatted but is more
+					// likely due to capabilities services which scrub headers
+					// from responses.  Assume we got what we asked for...
+					mHttpReplySize = data_size;
+					mHttpReplyOffset = mRequestedOffset;
+				}
+				else
+				{
+					mHttpReplySize = length;
+					mHttpReplyOffset = offset;
+				}
+			}
+
+			if (! partial)
+			{
+				// Response indicates this is the entire asset regardless
+				// of our asking for a byte range.  Mark it so and drop
+				// any partial data we might have so that the current
+				// response body becomes the entire dataset.
+				if (data_size <= mRequestedOffset)
+				{
+					LL_WARNS("Texture") << "Fetched entire texture " << mID
+										<< " when it was expected to be marked complete.  mImageSize:  "
+										<< mFileSize << " datasize:  " << mFormattedImage->getDataSize()
+										<< LL_ENDL;
+				}
+				mHaveAllData = TRUE;
+				llassert_always(mDecodeHandle == 0);
+				mFormattedImage = NULL; // discard any previous data we had
+			}
+			else if (data_size < mRequestedSize)
 			{
 				mHaveAllData = TRUE;
 			}
 			else if (data_size > mRequestedSize)
 			{
-				// *TODO: This shouldn't be happening any more
+				// *TODO: This shouldn't be happening any more  (REALLY don't expect this anymore)
 				llwarns << "data_size = " << data_size << " > requested: " << mRequestedSize << llendl;
 				mHaveAllData = TRUE;
 				llassert_always(mDecodeHandle == 0);
 				mFormattedImage = NULL; // discard any previous data we had
-				mBufferSize = data_size;
 			}
 		}
 		else
@@ -1778,10 +2167,11 @@ S32 LLTextureFetchWorker::callbackHttpGet(const LLChannelDescriptors& channels,
 
 //////////////////////////////////////////////////////////////////////////////
 
+// Threads:  Ttc
 void LLTextureFetchWorker::callbackCacheRead(bool success, LLImageFormatted* image,
 											 S32 imagesize, BOOL islocal)
 {
-	LLMutexLock lock(&mWorkMutex);
+	LLMutexLock lock(&mWorkMutex);										// +Mw
 	if (mState != LOAD_FROM_TEXTURE_CACHE)
 	{
 // 		llwarns << "Read callback for " << mID << " with state = " << mState << llendl;
@@ -1801,11 +2191,12 @@ void LLTextureFetchWorker::callbackCacheRead(bool success, LLImageFormatted* ima
 	}
 	mLoaded = TRUE;
 	setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
-}
+}																		// -Mw
 
+// Threads:  Ttc
 void LLTextureFetchWorker::callbackCacheWrite(bool success)
 {
-	LLMutexLock lock(&mWorkMutex);
+	LLMutexLock lock(&mWorkMutex);										// +Mw
 	if (mState != WAIT_ON_WRITE)
 	{
 // 		llwarns << "Write callback for " << mID << " with state = " << mState << llendl;
@@ -1813,13 +2204,14 @@ void LLTextureFetchWorker::callbackCacheWrite(bool success)
 	}
 	mWritten = TRUE;
 	setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
-}
+}																		// -Mw
 
 //////////////////////////////////////////////////////////////////////////////
 
+// Threads:  Tid
 void LLTextureFetchWorker::callbackDecoded(bool success, LLImageRaw* raw, LLImageRaw* aux)
 {
-	LLMutexLock lock(&mWorkMutex);
+	LLMutexLock lock(&mWorkMutex);										// +Mw
 	if (mDecodeHandle == 0)
 	{
 		return; // aborted, ignore
@@ -1852,10 +2244,11 @@ void LLTextureFetchWorker::callbackDecoded(bool success, LLImageRaw* raw, LLImag
 // 	llinfos << mID << " : DECODE COMPLETE " << llendl;
 	setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
 	mCacheReadTime = mCacheReadTimer.getElapsedTimeF32();
-}
+}																		// -Mw
 
 //////////////////////////////////////////////////////////////////////////////
 
+// Threads:  Ttf
 bool LLTextureFetchWorker::writeToCacheComplete()
 {
 	// Complete write to cache
@@ -1878,6 +2271,36 @@ bool LLTextureFetchWorker::writeToCacheComplete()
 }
 
 
+// Threads:  Ttf
+void LLTextureFetchWorker::recordTextureStart(bool is_http)
+{
+	if (! mMetricsStartTime)
+	{
+		mMetricsStartTime = LLViewerAssetStatsFF::get_timestamp();
+	}
+	LLViewerAssetStatsFF::record_enqueue_thread1(LLViewerAssetType::AT_TEXTURE,
+												 is_http,
+												 LLImageBase::TYPE_AVATAR_BAKE == mType);
+}
+
+
+// Threads:  Ttf
+void LLTextureFetchWorker::recordTextureDone(bool is_http)
+{
+	if (mMetricsStartTime)
+	{
+		LLViewerAssetStatsFF::record_response_thread1(LLViewerAssetType::AT_TEXTURE,
+													  is_http,
+													  LLImageBase::TYPE_AVATAR_BAKE == mType,
+													  LLViewerAssetStatsFF::get_timestamp() - mMetricsStartTime);
+		mMetricsStartTime = 0;
+	}
+	LLViewerAssetStatsFF::record_dequeue_thread1(LLViewerAssetType::AT_TEXTURE,
+												 is_http,
+												 LLImageBase::TYPE_AVATAR_BAKE == mType);
+}
+
+
 //////////////////////////////////////////////////////////////////////////////
 //////////////////////////////////////////////////////////////////////////////
 // public
@@ -1893,14 +2316,23 @@ LLTextureFetch::LLTextureFetch(LLTextureCache* cache, LLImageDecodeThread* image
 	  mTextureCache(cache),
 	  mImageDecodeThread(imagedecodethread),
 	  mTextureBandwidth(0),
-	  mCurlGetRequest(NULL),
+	  mHTTPTextureBits(0),
+	  mTotalHTTPRequests(0),
 	  mQAMode(qa_mode),
+	  mHttpRequest(NULL),
+	  mHttpOptions(NULL),
+	  mHttpHeaders(NULL),
+	  mHttpMetricsHeaders(NULL),
+	  mHttpPolicyClass(LLCore::HttpRequest::DEFAULT_POLICY_ID),
+	  mHttpSemaphore(HTTP_REQUESTS_IN_QUEUE_HIGH_WATER),
+	  mTotalCacheReadCount(0U),
+	  mTotalCacheWriteCount(0U),
+	  mTotalResourceWaitCount(0U),
 	  mFetchDebugger(NULL),
 	  mFetchSource(LLTextureFetch::FROM_ALL),
 	  mOriginFetchSource(LLTextureFetch::FROM_ALL),
 	  mFetcherLocked(FALSE)
 {
-	mCurlPOSTRequestCount = 0;
 	mMaxBandwidth = gSavedSettings.getF32("ThrottleBandwidthKBPS");
 	mTextureInfo.setUpLogging(gSavedSettings.getBOOL("LogTextureDownloadsToViewerLog"), gSavedSettings.getBOOL("LogTextureDownloadsToSimulator"), gSavedSettings.getU32("TextureLoggingThreshold"));
 
@@ -1916,11 +2348,19 @@ LLTextureFetch::LLTextureFetch(LLTextureCache* cache, LLImageDecodeThread* image
 		}
 		mOriginFetchSource = mFetchSource;
 	}
+	
+	mHttpRequest = new LLCore::HttpRequest;
+	mHttpOptions = new LLCore::HttpOptions;
+	mHttpHeaders = new LLCore::HttpHeaders;
+	mHttpHeaders->mHeaders.push_back("Accept: image/x-j2c");
+	mHttpMetricsHeaders = new LLCore::HttpHeaders;
+	mHttpMetricsHeaders->mHeaders.push_back("Content-Type: application/llsd+xml");
+	mHttpPolicyClass = LLAppViewer::instance()->getAppCoreHttp().getPolicyDefault();
 }
 
 LLTextureFetch::~LLTextureFetch()
 {
-	clearDeleteList() ;
+	clearDeleteList();
 
 	while (! mCommands.empty())
 	{
@@ -1928,10 +2368,34 @@ LLTextureFetch::~LLTextureFetch()
 		mCommands.erase(mCommands.begin());
 		delete req;
 	}
+
+	if (mHttpOptions)
+	{
+		mHttpOptions->release();
+		mHttpOptions = NULL;
+	}
+
+	if (mHttpHeaders)
+	{
+		mHttpHeaders->release();
+		mHttpHeaders = NULL;
+	}
+
+	if (mHttpMetricsHeaders)
+	{
+		mHttpMetricsHeaders->release();
+		mHttpMetricsHeaders = NULL;
+	}
+
+	mHttpWaitResource.clear();
 	
-	// ~LLQueuedThread() called here
+	delete mHttpRequest;
+	mHttpRequest = NULL;
 
 	delete mFetchDebugger;
+	mFetchDebugger = NULL;
+	
+	// ~LLQueuedThread() called here
 }
 
 bool LLTextureFetch::createRequest(const std::string& url, const LLUUID& id, const LLHost& host, F32 priority,
@@ -1997,7 +2461,7 @@ bool LLTextureFetch::createRequest(const std::string& url, const LLUUID& id, con
 		{
 			return false; // need to wait for previous aborted request to complete
 		}
-		worker->lockWorkMutex();
+		worker->lockWorkMutex();										// +Mw
 		worker->mActiveCount++;
 		worker->mNeedsAux = needs_aux;
 		worker->setImagePriority(priority);
@@ -2006,41 +2470,44 @@ bool LLTextureFetch::createRequest(const std::string& url, const LLUUID& id, con
 		if (!worker->haveWork())
 		{
 			worker->mState = LLTextureFetchWorker::INIT;
-			worker->unlockWorkMutex();
+			worker->unlockWorkMutex();									// -Mw
 
 			worker->addWork(0, LLWorkerThread::PRIORITY_HIGH | worker->mWorkPriority);
 		}
 		else
 		{
-			worker->unlockWorkMutex();
+			worker->unlockWorkMutex();									// -Mw
 		}
 	}
 	else
 	{
 		worker = new LLTextureFetchWorker(this, url, id, host, priority, desired_discard, desired_size);
-		lockQueue() ;
+		lockQueue();													// +Mfq
 		mRequestMap[id] = worker;
-		unlockQueue() ;
+		unlockQueue();													// -Mfq
 
-		worker->lockWorkMutex();
+		worker->lockWorkMutex();										// +Mw
 		worker->mActiveCount++;
 		worker->mNeedsAux = needs_aux;
 		worker->setCanUseHTTP(can_use_http) ;
-		worker->unlockWorkMutex();
+		worker->unlockWorkMutex();										// -Mw
 	}
 	
 // 	llinfos << "REQUESTED: " << id << " Discard: " << desired_discard << llendl;
 	return true;
 }
 
+
+// Threads:  T* (but Ttf in practice)
+
 // protected
 void LLTextureFetch::addToNetworkQueue(LLTextureFetchWorker* worker)
 {
-	lockQueue() ;
+	lockQueue();														// +Mfq
 	bool in_request_map = (mRequestMap.find(worker->mID) != mRequestMap.end()) ;
-	unlockQueue() ;
+	unlockQueue();														// -Mfq
 
-	LLMutexLock lock(&mNetworkQueueMutex);
+	LLMutexLock lock(&mNetworkQueueMutex);								// +Mfnq		
 	if (in_request_map)
 	{
 		// only add to the queue if in the request map
@@ -2052,27 +2519,68 @@ void LLTextureFetch::addToNetworkQueue(LLTextureFetchWorker* worker)
 	{
 		iter1->second.erase(worker->mID);
 	}
-}
+}																		// -Mfnq
 
+// Threads:  T*
 void LLTextureFetch::removeFromNetworkQueue(LLTextureFetchWorker* worker, bool cancel)
 {
-	LLMutexLock lock(&mNetworkQueueMutex);
+	LLMutexLock lock(&mNetworkQueueMutex);								// +Mfnq
 	size_t erased = mNetworkQueue.erase(worker->mID);
 	if (cancel && erased > 0)
 	{
 		mCancelQueue[worker->mHost].insert(worker->mID);
 	}
-}
+}																		// -Mfnq
 
+// Threads:  T*
+//
+// protected
+void LLTextureFetch::addToHTTPQueue(const LLUUID& id)
+{
+	LLMutexLock lock(&mNetworkQueueMutex);								// +Mfnq
+	mHTTPTextureQueue.insert(id);
+	mTotalHTTPRequests++;
+}																		// -Mfnq
+
+// Threads:  T*
+void LLTextureFetch::removeFromHTTPQueue(const LLUUID& id, S32 received_size)
+{
+	LLMutexLock lock(&mNetworkQueueMutex);								// +Mfnq
+	mHTTPTextureQueue.erase(id);
+	mHTTPTextureBits += received_size * 8; // Approximate - does not include header bits	
+}																		// -Mfnq
+
+// NB:  If you change deleteRequest() you should probably make
+// parallel changes in removeRequest().  They're functionally
+// identical with only argument variations.
+//
+// Threads:  T*
 void LLTextureFetch::deleteRequest(const LLUUID& id, bool cancel)
 {
-	lockQueue() ;
+	lockQueue();														// +Mfq
 	LLTextureFetchWorker* worker = getWorkerAfterLock(id);
-	unlockQueue() ;
+	if (worker)
+	{		
+		size_t erased_1 = mRequestMap.erase(worker->mID);
+		unlockQueue();													// -Mfq
 
-	removeRequest(worker, cancel);
+		llassert_always(erased_1 > 0) ;
+		removeFromNetworkQueue(worker, cancel);
+		llassert_always(!(worker->getFlags(LLWorkerClass::WCF_DELETE_REQUESTED))) ;
+
+		worker->scheduleDelete();	
+	}
+	else
+	{
+		unlockQueue();													// -Mfq
+	}
 }
 
+// NB:  If you change removeRequest() you should probably make
+// parallel changes in deleteRequest().  They're functionally
+// identical with only argument variations.
+//
+// Threads:  T*
 void LLTextureFetch::removeRequest(LLTextureFetchWorker* worker, bool cancel)
 {
 	if(!worker)
@@ -2080,15 +2588,14 @@ void LLTextureFetch::removeRequest(LLTextureFetchWorker* worker, bool cancel)
 		return;
 	}
 
-	lockQueue() ;
+	lockQueue();														// +Mfq
 	size_t erased_1 = mRequestMap.erase(worker->mID);
-	unlockQueue() ;
+	unlockQueue();														// -Mfq
 
 	llassert_always(erased_1 > 0) ;
 	removeFromNetworkQueue(worker, cancel);
 	llassert_always(!(worker->getFlags(LLWorkerClass::WCF_DELETE_REQUESTED))) ;
 
-	worker->removeFromHTTPQueue();
 	worker->scheduleDelete();	
 }
 
@@ -2110,16 +2617,39 @@ void LLTextureFetch::deleteAllRequests()
 	}
 }
 
+// Threads:  T*
 S32 LLTextureFetch::getNumRequests() 
 { 
-	lockQueue() ;
+	lockQueue();														// +Mfq
 	S32 size = (S32)mRequestMap.size(); 
-	unlockQueue() ;
+	unlockQueue();														// -Mfq
 
-	return size ;
+	return size;
+}
+
+// Threads:  T*
+S32 LLTextureFetch::getNumHTTPRequests() 
+{ 
+	mNetworkQueueMutex.lock();											// +Mfq
+	S32 size = (S32)mHTTPTextureQueue.size(); 
+	mNetworkQueueMutex.unlock();										// -Mfq
+
+	return size;
+}
+
+// Threads:  T*
+U32 LLTextureFetch::getTotalNumHTTPRequests()
+{
+	mNetworkQueueMutex.lock();											// +Mfq
+	U32 size = mTotalHTTPRequests;
+	mNetworkQueueMutex.unlock();										// -Mfq
+
+	return size;
 }
 
 // call lockQueue() first!
+// Threads:  T*
+// Locks:  Mfq
 LLTextureFetchWorker* LLTextureFetch::getWorkerAfterLock(const LLUUID& id)
 {
 	LLTextureFetchWorker* res = NULL;
@@ -2131,14 +2661,16 @@ LLTextureFetchWorker* LLTextureFetch::getWorkerAfterLock(const LLUUID& id)
 	return res;
 }
 
+// Threads:  T*
 LLTextureFetchWorker* LLTextureFetch::getWorker(const LLUUID& id)
 {
-	LLMutexLock lock(&mQueueMutex) ;
+	LLMutexLock lock(&mQueueMutex);										// +Mfq
 
-	return getWorkerAfterLock(id) ;
-}
+	return getWorkerAfterLock(id);
+}																		// -Mfq
 
 
+// Threads:  T*
 bool LLTextureFetch::getRequestFinished(const LLUUID& id, S32& discard_level,
 										LLPointer<LLImageRaw>& raw, LLPointer<LLImageRaw>& aux)
 {
@@ -2161,7 +2693,7 @@ bool LLTextureFetch::getRequestFinished(const LLUUID& id, S32& discard_level,
 		}
 		else if (worker->checkWork())
 		{
-			worker->lockWorkMutex();
+			worker->lockWorkMutex();									// +Mw
 			discard_level = worker->mDecodedDiscard;
 			raw = worker->mRawImage;
 			aux = worker->mAuxImage;
@@ -2172,11 +2704,11 @@ bool LLTextureFetch::getRequestFinished(const LLUUID& id, S32& discard_level,
 			}
 			res = true;
 			LL_DEBUGS("Texture") << id << ": Request Finished. State: " << worker->mState << " Discard: " << discard_level << LL_ENDL;
-			worker->unlockWorkMutex();
+			worker->unlockWorkMutex();									// -Mw
 		}
 		else
 		{
-			worker->lockWorkMutex();
+			worker->lockWorkMutex();									// +Mw
 			if ((worker->mDecodedDiscard >= 0) &&
 				(worker->mDecodedDiscard < discard_level || discard_level < 0) &&
 				(worker->mState >= LLTextureFetchWorker::WAIT_ON_WRITE))
@@ -2186,7 +2718,7 @@ bool LLTextureFetch::getRequestFinished(const LLUUID& id, S32& discard_level,
 				raw = worker->mRawImage;
 				aux = worker->mAuxImage;
 			}
-			worker->unlockWorkMutex();
+			worker->unlockWorkMutex();									// -Mw
 		}
 	}
 	else
@@ -2196,15 +2728,16 @@ bool LLTextureFetch::getRequestFinished(const LLUUID& id, S32& discard_level,
 	return res;
 }
 
+// Threads:  T*
 bool LLTextureFetch::updateRequestPriority(const LLUUID& id, F32 priority)
 {
 	bool res = false;
 	LLTextureFetchWorker* worker = getWorker(id);
 	if (worker)
 	{
-		worker->lockWorkMutex();
+		worker->lockWorkMutex();										// +Mw
 		worker->setImagePriority(priority);
-		worker->unlockWorkMutex();		
+		worker->unlockWorkMutex();										// -Mw
 		res = true;
 	}
 	return res;
@@ -2219,24 +2752,24 @@ bool LLTextureFetch::updateRequestPriority(const LLUUID& id, F32 priority)
 // in step, at least until this can be refactored and
 // the redundancy eliminated.
 //
-// May be called from any thread
+// Threads:  T*
 
 //virtual
 S32 LLTextureFetch::getPending()
 {
 	S32 res;
-	lockData();
+	lockData();															// +Ct
     {
-        LLMutexLock lock(&mQueueMutex);
+        LLMutexLock lock(&mQueueMutex);									// +Mfq
         
         res = mRequestQueue.size();
-        res += mCurlPOSTRequestCount;
         res += mCommands.size();
-    }
-	unlockData();
+    }																	// -Mfq
+	unlockData();														// -Ct
 	return res;
 }
 
+// Locks:  Ct
 // virtual
 bool LLTextureFetch::runCondition()
 {
@@ -2251,42 +2784,53 @@ bool LLTextureFetch::runCondition()
 	
 	bool have_no_commands(false);
 	{
-		LLMutexLock lock(&mQueueMutex);
+		LLMutexLock lock(&mQueueMutex);									// +Mfq
 		
 		have_no_commands = mCommands.empty();
-	}
-	
-    bool have_no_curl_requests(0 == mCurlPOSTRequestCount);
+	}																	// -Mfq
 	
 	return ! (have_no_commands
-			  && have_no_curl_requests
 			  && (mRequestQueue.empty() && mIdleThread));		// From base class
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
-// MAIN THREAD (unthreaded envs), WORKER THREAD (threaded envs)
+// Threads:  Ttf
 void LLTextureFetch::commonUpdate()
 {
+	// Release waiters
+	releaseHttpWaiters();
+	
 	// Run a cross-thread command, if any.
 	cmdDoWork();
 	
-	// Update Curl on same thread as mCurlGetRequest was constructed
-	S32 processed = mCurlGetRequest->process();
-	if (processed > 0)
+	// Deliver all completion notifications
+	LLCore::HttpStatus status = mHttpRequest->update(0);
+	if (! status)
 	{
-		lldebugs << "processed: " << processed << " messages." << llendl;
+		LL_INFOS_ONCE("Texture") << "Problem during HTTP servicing.  Reason:  "
+								 << status.toString()
+								 << LL_ENDL;
 	}
 }
 
 
-// MAIN THREAD
+// Threads:  Tmain
+
 //virtual
 S32 LLTextureFetch::update(F32 max_time_ms)
 {
 	static LLCachedControl<F32> band_width(gSavedSettings,"ThrottleBandwidthKBPS");
 
-	mMaxBandwidth = band_width ;
+	{
+		mNetworkQueueMutex.lock();										// +Mfnq
+		mMaxBandwidth = band_width;
+
+		gTextureList.sTextureBits += mHTTPTextureBits;
+		mHTTPTextureBits = 0;
+
+		mNetworkQueueMutex.unlock();									// -Mfnq
+	}
 
 	S32 res = LLWorkerThread::update(max_time_ms);
 	
@@ -2304,19 +2848,9 @@ S32 LLTextureFetch::update(F32 max_time_ms)
 	if (!mThreaded)
 	{
 		commonUpdate();
-		
-		if(mCurlGetRequest)
-		{
-			mCurlGetRequest->nextRequests();
-		}
-	}
-
-	if(mCurlGetRequest)
-	{
-		gTextureList.sTextureBits += mCurlGetRequest->getTotalReceivedBits();
 	}
 
-	if(mFetchDebugger)
+	if (mFetchDebugger)
 	{
 		mFetchDebugger->tryToStopDebug(); //check if need to stop debugger.
 	}
@@ -2324,7 +2858,9 @@ S32 LLTextureFetch::update(F32 max_time_ms)
 	return res;
 }
 
-//called in the MAIN thread after the TextureCacheThread shuts down.
+// called in the MAIN thread after the TextureCacheThread shuts down.
+//
+// Threads:  Tmain
 void LLTextureFetch::shutDownTextureCacheThread() 
 {
 	if(mTextureCache)
@@ -2334,7 +2870,9 @@ void LLTextureFetch::shutDownTextureCacheThread()
 	}
 }
 	
-//called in the MAIN thread after the ImageDecodeThread shuts down.
+// called in the MAIN thread after the ImageDecodeThread shuts down.
+//
+// Threads:  Tmain
 void LLTextureFetch::shutDownImageDecodeThread() 
 {
 	if(mImageDecodeThread)
@@ -2344,37 +2882,27 @@ void LLTextureFetch::shutDownImageDecodeThread()
 	}
 }
 
-// WORKER THREAD
+// Threads:  Ttf
 void LLTextureFetch::startThread()
 {
-	// Construct mCurlGetRequest from Worker Thread
-	mCurlGetRequest = new LLCurlTextureRequest(8);
-	
-	if(mFetchDebugger)
-	{
-		mFetchDebugger->setCurlGetRequest(mCurlGetRequest);
-	}
 }
 
-// WORKER THREAD
+// Threads:  Ttf
 void LLTextureFetch::endThread()
 {
-	// Destroy mCurlGetRequest from Worker Thread
-	delete mCurlGetRequest;
-	mCurlGetRequest = NULL;
-	if(mFetchDebugger)
-	{
-		mFetchDebugger->setCurlGetRequest(NULL);
-	}
+	LL_INFOS("Texture") << "CacheReads:  " << mTotalCacheReadCount
+						<< ", CacheWrites:  " << mTotalCacheWriteCount
+						<< ", ResWaits:  " << mTotalResourceWaitCount
+						<< ", TotalHTTPReq:  " << getTotalNumHTTPRequests()
+						<< LL_ENDL;
 }
 
-// WORKER THREAD
+// Threads:  Ttf
 void LLTextureFetch::threadedUpdate()
 {
-	llassert_always(mCurlGetRequest);
-	
-	mCurlGetRequest->nextRequests();
+	llassert_always(mHttpRequest);
 
+#if 0
 	// Limit update frequency
 	const F32 PROCESS_TIME = 0.05f; 
 	static LLFrameTimer process_timer;
@@ -2383,9 +2911,10 @@ void LLTextureFetch::threadedUpdate()
 		return;
 	}
 	process_timer.reset();
+#endif
 	
 	commonUpdate();
-
+	
 #if 0
 	const F32 INFO_TIME = 1.0f; 
 	static LLFrameTimer info_timer;
@@ -2399,11 +2928,11 @@ void LLTextureFetch::threadedUpdate()
 		}
 	}
 #endif
-	
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
+// Threads:  Tmain
 void LLTextureFetch::sendRequestListToSimulators()
 {
 	// All requests
@@ -2429,48 +2958,48 @@ void LLTextureFetch::sendRequestListToSimulators()
 	typedef std::map< LLHost, request_list_t > work_request_map_t;
 	work_request_map_t requests;
 	{
-	LLMutexLock lock2(&mNetworkQueueMutex);
-	for (queue_t::iterator iter = mNetworkQueue.begin(); iter != mNetworkQueue.end(); )
-	{
-		queue_t::iterator curiter = iter++;
-		LLTextureFetchWorker* req = getWorker(*curiter);
-		if (!req)
+		LLMutexLock lock2(&mNetworkQueueMutex);							// +Mfnq
+		for (queue_t::iterator iter = mNetworkQueue.begin(); iter != mNetworkQueue.end(); )
 		{
-			mNetworkQueue.erase(curiter);
-			continue; // paranoia
-		}
-		if ((req->mState != LLTextureFetchWorker::LOAD_FROM_NETWORK) &&
-			(req->mState != LLTextureFetchWorker::LOAD_FROM_SIMULATOR))
-		{
-			// We already received our URL, remove from the queue
-			llwarns << "Worker: " << req->mID << " in mNetworkQueue but in wrong state: " << req->mState << llendl;
-			mNetworkQueue.erase(curiter);
-			continue;
-		}
-		if (req->mID == mDebugID)
-		{
-			mDebugCount++; // for setting breakpoints
-		}
-		if (req->mSentRequest == LLTextureFetchWorker::SENT_SIM &&
-			req->mTotalPackets > 0 &&
-			req->mLastPacket >= req->mTotalPackets-1)
-		{
-			// We have all the packets... make sure this is high priority
+			queue_t::iterator curiter = iter++;
+			LLTextureFetchWorker* req = getWorker(*curiter);
+			if (!req)
+			{
+				mNetworkQueue.erase(curiter);
+				continue; // paranoia
+			}
+			if ((req->mState != LLTextureFetchWorker::LOAD_FROM_NETWORK) &&
+				(req->mState != LLTextureFetchWorker::LOAD_FROM_SIMULATOR))
+			{
+				// We already received our URL, remove from the queue
+				llwarns << "Worker: " << req->mID << " in mNetworkQueue but in wrong state: " << req->mState << llendl;
+				mNetworkQueue.erase(curiter);
+				continue;
+			}
+			if (req->mID == mDebugID)
+			{
+				mDebugCount++; // for setting breakpoints
+			}
+			if (req->mSentRequest == LLTextureFetchWorker::SENT_SIM &&
+				req->mTotalPackets > 0 &&
+				req->mLastPacket >= req->mTotalPackets-1)
+			{
+				// We have all the packets... make sure this is high priority
 // 			req->setPriority(LLWorkerThread::PRIORITY_HIGH | req->mWorkPriority);
-			continue;
-		}
-		F32 elapsed = req->mRequestedTimer.getElapsedTimeF32();
-		{
-			F32 delta_priority = llabs(req->mRequestedPriority - req->mImagePriority);
-			if ((req->mSimRequestedDiscard != req->mDesiredDiscard) ||
-				(delta_priority > MIN_DELTA_PRIORITY && elapsed >= MIN_REQUEST_TIME) ||
-				(elapsed >= SIM_LAZY_FLUSH_TIMEOUT))
+				continue;
+			}
+			F32 elapsed = req->mRequestedTimer.getElapsedTimeF32();
 			{
-				requests[req->mHost].insert(req);
+				F32 delta_priority = llabs(req->mRequestedPriority - req->mImagePriority);
+				if ((req->mSimRequestedDiscard != req->mDesiredDiscard) ||
+					(delta_priority > MIN_DELTA_PRIORITY && elapsed >= MIN_REQUEST_TIME) ||
+					(elapsed >= SIM_LAZY_FLUSH_TIMEOUT))
+				{
+					requests[req->mHost].insert(req);
+				}
 			}
 		}
-	}
-	}
+	}																	// -Mfnq
 
 	for (work_request_map_t::iterator iter1 = requests.begin();
 		 iter1 != requests.end(); ++iter1)
@@ -2493,9 +3022,9 @@ void LLTextureFetch::sendRequestListToSimulators()
 				if (req->mSentRequest != LLTextureFetchWorker::SENT_SIM)
 				{
 					// Initialize packet data based on data read from cache
-					req->lockWorkMutex();
+					req->lockWorkMutex();								// +Mw
 					req->setupPacketData();
-					req->unlockWorkMutex();
+					req->unlockWorkMutex();								// -Mw		
 				}
 				if (0 == sim_request_count)
 				{
@@ -2524,12 +3053,12 @@ void LLTextureFetch::sendRequestListToSimulators()
 					mTextureInfo.setRequestType(req->mID, LLTextureInfoDetails::REQUEST_TYPE_UDP);
 				}
 
-				req->lockWorkMutex();
+				req->lockWorkMutex();									// +Mw
 				req->mSentRequest = LLTextureFetchWorker::SENT_SIM;
 				req->mSimRequestedDiscard = req->mDesiredDiscard;
 				req->mRequestedPriority = req->mImagePriority;
 				req->mRequestedTimer.reset();
-				req->unlockWorkMutex();
+				req->unlockWorkMutex();									// -Mw
 				sim_request_count++;
 				if (sim_request_count >= IMAGES_PER_REQUEST)
 				{
@@ -2550,55 +3079,57 @@ void LLTextureFetch::sendRequestListToSimulators()
 	
 	// Send cancelations
 	{
-	LLMutexLock lock2(&mNetworkQueueMutex);
-	if (gMessageSystem && !mCancelQueue.empty())
-	{
-		for (cancel_queue_t::iterator iter1 = mCancelQueue.begin();
-			 iter1 != mCancelQueue.end(); ++iter1)
+		LLMutexLock lock2(&mNetworkQueueMutex);							// +Mfnq
+		if (gMessageSystem && !mCancelQueue.empty())
 		{
-			LLHost host = iter1->first;
-			if (host == LLHost::invalid)
-			{
-				host = gAgent.getRegionHost();
-			}
-			S32 request_count = 0;
-			for (queue_t::iterator iter2 = iter1->second.begin();
-				 iter2 != iter1->second.end(); ++iter2)
+			for (cancel_queue_t::iterator iter1 = mCancelQueue.begin();
+				 iter1 != mCancelQueue.end(); ++iter1)
 			{
-				if (0 == request_count)
+				LLHost host = iter1->first;
+				if (host == LLHost::invalid)
 				{
-					gMessageSystem->newMessageFast(_PREHASH_RequestImage);
-					gMessageSystem->nextBlockFast(_PREHASH_AgentData);
-					gMessageSystem->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
-					gMessageSystem->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
+					host = gAgent.getRegionHost();
 				}
-				gMessageSystem->nextBlockFast(_PREHASH_RequestImage);
-				gMessageSystem->addUUIDFast(_PREHASH_Image, *iter2);
-				gMessageSystem->addS8Fast(_PREHASH_DiscardLevel, -1);
-				gMessageSystem->addF32Fast(_PREHASH_DownloadPriority, 0);
-				gMessageSystem->addU32Fast(_PREHASH_Packet, 0);
-				gMessageSystem->addU8Fast(_PREHASH_Type, 0);
+				S32 request_count = 0;
+				for (queue_t::iterator iter2 = iter1->second.begin();
+					 iter2 != iter1->second.end(); ++iter2)
+				{
+					if (0 == request_count)
+					{
+						gMessageSystem->newMessageFast(_PREHASH_RequestImage);
+						gMessageSystem->nextBlockFast(_PREHASH_AgentData);
+						gMessageSystem->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
+						gMessageSystem->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
+					}
+					gMessageSystem->nextBlockFast(_PREHASH_RequestImage);
+					gMessageSystem->addUUIDFast(_PREHASH_Image, *iter2);
+					gMessageSystem->addS8Fast(_PREHASH_DiscardLevel, -1);
+					gMessageSystem->addF32Fast(_PREHASH_DownloadPriority, 0);
+					gMessageSystem->addU32Fast(_PREHASH_Packet, 0);
+					gMessageSystem->addU8Fast(_PREHASH_Type, 0);
 // 				llinfos << "CANCELING IMAGE REQUEST: " << (*iter2) << llendl;
 
-				request_count++;
-				if (request_count >= IMAGES_PER_REQUEST)
+					request_count++;
+					if (request_count >= IMAGES_PER_REQUEST)
+					{
+						gMessageSystem->sendSemiReliable(host, NULL, NULL);
+						request_count = 0;
+					}
+				}
+				if (request_count > 0 && request_count < IMAGES_PER_REQUEST)
 				{
 					gMessageSystem->sendSemiReliable(host, NULL, NULL);
-					request_count = 0;
 				}
 			}
-			if (request_count > 0 && request_count < IMAGES_PER_REQUEST)
-			{
-				gMessageSystem->sendSemiReliable(host, NULL, NULL);
-			}
+			mCancelQueue.clear();
 		}
-		mCancelQueue.clear();
-	}
-	}
+	}																	// -Mfnq
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
+// Threads:  T*
+// Locks:  Mw
 bool LLTextureFetchWorker::insertPacket(S32 index, U8* data, S32 size)
 {
 	mRequestedTimer.reset();
@@ -2631,6 +3162,7 @@ bool LLTextureFetchWorker::insertPacket(S32 index, U8* data, S32 size)
 	return true;
 }
 
+// Threads:  T*
 bool LLTextureFetch::receiveImageHeader(const LLHost& host, const LLUUID& id, U8 codec, U16 packets, U32 totalbytes,
 										U16 data_size, U8* data)
 {
@@ -2665,14 +3197,14 @@ bool LLTextureFetch::receiveImageHeader(const LLHost& host, const LLUUID& id, U8
 	}
 	if (!res)
 	{
+		mNetworkQueueMutex.lock();										// +Mfnq
 		++mBadPacketCount;
-		mNetworkQueueMutex.lock() ;
 		mCancelQueue[host].insert(id);
-		mNetworkQueueMutex.unlock() ;
+		mNetworkQueueMutex.unlock();									// -Mfnq 
 		return false;
 	}
 
-	worker->lockWorkMutex();
+	worker->lockWorkMutex();											// +Mw
 
 	//	Copy header data into image object
 	worker->mImageCodec = codec;
@@ -2683,10 +3215,12 @@ bool LLTextureFetch::receiveImageHeader(const LLHost& host, const LLUUID& id, U8
 	res = worker->insertPacket(0, data, data_size);
 	worker->setPriority(LLWorkerThread::PRIORITY_HIGH | worker->mWorkPriority);
 	worker->mState = LLTextureFetchWorker::LOAD_FROM_SIMULATOR;
-	worker->unlockWorkMutex();
+	worker->unlockWorkMutex();											// -Mw
 	return res;
 }
 
+
+// Threads:  T*
 bool LLTextureFetch::receiveImagePacket(const LLHost& host, const LLUUID& id, U16 packet_num, U16 data_size, U8* data)
 {
 	LLTextureFetchWorker* worker = getWorker(id);
@@ -2711,14 +3245,14 @@ bool LLTextureFetch::receiveImagePacket(const LLHost& host, const LLUUID& id, U1
 	}
 	if (!res)
 	{
+		mNetworkQueueMutex.lock();										// +Mfnq
 		++mBadPacketCount;
-		mNetworkQueueMutex.lock() ;
 		mCancelQueue[host].insert(id);
-		mNetworkQueueMutex.unlock() ;
+		mNetworkQueueMutex.unlock();									// -Mfnq
 		return false;
 	}
 
-	worker->lockWorkMutex();
+	worker->lockWorkMutex();											// +Mw
 	
 	res = worker->insertPacket(packet_num, data, data_size);
 	
@@ -2735,7 +3269,7 @@ bool LLTextureFetch::receiveImagePacket(const LLHost& host, const LLUUID& id, U1
 		removeFromNetworkQueue(worker, true); // failsafe
 	}
 
-	if(packet_num >= (worker->mTotalPackets - 1))
+	if (packet_num >= (worker->mTotalPackets - 1))
 	{
 		static LLCachedControl<bool> log_to_viewer_log(gSavedSettings,"LogTextureDownloadsToViewerLog");
 		static LLCachedControl<bool> log_to_sim(gSavedSettings,"LogTextureDownloadsToSimulator");
@@ -2747,12 +3281,14 @@ bool LLTextureFetch::receiveImagePacket(const LLHost& host, const LLUUID& id, U1
 			mTextureInfo.setRequestCompleteTimeAndLog(id, timeNow);
 		}
 	}
-	worker->unlockWorkMutex();
+	worker->unlockWorkMutex();											// -Mw
 
 	return res;
 }
 
 //////////////////////////////////////////////////////////////////////////////
+
+// Threads:  T*
 BOOL LLTextureFetch::isFromLocalCache(const LLUUID& id)
 {
 	BOOL from_cache = FALSE ;
@@ -2760,14 +3296,15 @@ BOOL LLTextureFetch::isFromLocalCache(const LLUUID& id)
 	LLTextureFetchWorker* worker = getWorker(id);
 	if (worker)
 	{
-		worker->lockWorkMutex() ;
-		from_cache = worker->mInLocalCache ;
-		worker->unlockWorkMutex() ;
+		worker->lockWorkMutex();										// +Mw
+		from_cache = worker->mInLocalCache;
+		worker->unlockWorkMutex();										// -Mw
 	}
 
 	return from_cache ;
 }
 
+// Threads:  T*
 S32 LLTextureFetch::getFetchState(const LLUUID& id, F32& data_progress_p, F32& requested_priority_p,
 								  U32& fetch_priority_p, F32& fetch_dtime_p, F32& request_dtime_p, bool& can_use_http)
 {
@@ -2781,7 +3318,7 @@ S32 LLTextureFetch::getFetchState(const LLUUID& id, F32& data_progress_p, F32& r
 	LLTextureFetchWorker* worker = getWorker(id);
 	if (worker && worker->haveWork())
 	{
-		worker->lockWorkMutex();
+		worker->lockWorkMutex();										// +Mw
 		state = worker->mState;
 		fetch_dtime = worker->mFetchTimer.getElapsedTimeF32();
 		request_dtime = worker->mRequestedTimer.getElapsedTimeF32();
@@ -2808,7 +3345,7 @@ S32 LLTextureFetch::getFetchState(const LLUUID& id, F32& data_progress_p, F32& r
 		}
 		fetch_priority = worker->getPriority();
 		can_use_http = worker->getCanUseHTTP() ;
-		worker->unlockWorkMutex();
+		worker->unlockWorkMutex();										// -Mw
 	}
 	data_progress_p = data_progress;
 	requested_priority_p = requested_priority;
@@ -2832,12 +3369,219 @@ void LLTextureFetch::dump()
 				<< " STATE: " << worker->sStateDescs[worker->mState]
 				<< llendl;
 	}
+
+	llinfos << "LLTextureFetch ACTIVE_HTTP:" << llendl;
+	for (queue_t::const_iterator iter(mHTTPTextureQueue.begin());
+		 mHTTPTextureQueue.end() != iter;
+		 ++iter)
+	{
+		llinfos << " ID: " << (*iter) << llendl;
+	}
+
+	llinfos << "LLTextureFetch WAIT_HTTP_RESOURCE:" << llendl;
+	for (wait_http_res_queue_t::const_iterator iter(mHttpWaitResource.begin());
+		 mHttpWaitResource.end() != iter;
+		 ++iter)
+	{
+		llinfos << " ID: " << (*iter) << llendl;
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+// HTTP Resource Waiting Methods
+
+// Threads:  Ttf
+void LLTextureFetch::addHttpWaiter(const LLUUID & tid)
+{
+	mNetworkQueueMutex.lock();											// +Mfnq
+	mHttpWaitResource.insert(tid);
+	mNetworkQueueMutex.unlock();										// -Mfnq
+}
+
+// Threads:  Ttf
+void LLTextureFetch::removeHttpWaiter(const LLUUID & tid)
+{
+	mNetworkQueueMutex.lock();											// +Mfnq
+	wait_http_res_queue_t::iterator iter(mHttpWaitResource.find(tid));
+	if (mHttpWaitResource.end() != iter)
+	{
+		mHttpWaitResource.erase(iter);
+	}
+	mNetworkQueueMutex.unlock();										// -Mfnq
+}
+
+// Threads:  T*
+bool LLTextureFetch::isHttpWaiter(const LLUUID & tid)
+{
+	mNetworkQueueMutex.lock();											// +Mfnq
+	wait_http_res_queue_t::iterator iter(mHttpWaitResource.find(tid));
+	const bool ret(mHttpWaitResource.end() != iter);
+	mNetworkQueueMutex.unlock();										// -Mfnq
+	return ret;
+}
+
+// Release as many requests as permitted from the WAIT_HTTP_RESOURCE2
+// state to the SEND_HTTP_REQ state based on their current priority.
+//
+// This data structures and code associated with this looks a bit
+// indirect and naive but it's done in the name of safety.  An
+// ordered container may become invalid from time to time due to
+// priority changes caused by actions in other threads.  State itself
+// could also suffer the same fate with canceled operations.  Even
+// done this way, I'm not fully trusting we're truly safe.  This
+// module is due for a major refactoring and we'll deal with it then.
+//
+// Threads:  Ttf
+// Locks:  -Mw (must not hold any worker when called)
+void LLTextureFetch::releaseHttpWaiters()
+{
+	// Use mHttpSemaphore rather than mHTTPTextureQueue.size()
+	// to avoid a lock.  
+	if (mHttpSemaphore < (HTTP_REQUESTS_IN_QUEUE_HIGH_WATER - HTTP_REQUESTS_IN_QUEUE_LOW_WATER))
+		return;
+
+	// Quickly make a copy of all the LLUIDs.  Get off the
+	// mutex as early as possible.
+	typedef std::vector<LLUUID> uuid_vec_t;
+	uuid_vec_t tids;
+
+	{
+		LLMutexLock lock(&mNetworkQueueMutex);							// +Mfnq
+
+		if (mHttpWaitResource.empty())
+			return;
+		tids.reserve(mHttpWaitResource.size());
+		tids.assign(mHttpWaitResource.begin(), mHttpWaitResource.end());
+	}																	// -Mfnq
+
+	// Now lookup the UUUIDs to find valid requests and sort
+	// them in priority order, highest to lowest.  We're going
+	// to modify priority later as a side-effect of releasing
+	// these objects.  That, in turn, would violate the partial
+	// ordering assumption of std::set, std::map, etc. so we
+	// don't use those containers.  We use a vector and an explicit
+	// sort to keep the containers valid later.
+	typedef std::vector<LLTextureFetchWorker *> worker_list_t;
+	worker_list_t tids2;
+
+	tids2.reserve(tids.size());
+	for (uuid_vec_t::iterator iter(tids.begin());
+		 tids.end() != iter;
+		 ++iter)
+	{
+		LLTextureFetchWorker * worker(getWorker(* iter));
+		if (worker)
+		{
+			tids2.push_back(worker);
+		}
+		else
+		{
+			// If worker isn't found, this should be due to a request
+			// for deletion.  We signal our recognition that this
+			// uuid shouldn't be used for resource waiting anymore by
+			// erasing it from the resource waiter list.  That allows
+			// deleteOK to do final deletion on the worker.
+			removeHttpWaiter(* iter);
+		}
+	}
+	tids.clear();
+
+	// Sort into priority order, if necessary and only as much as needed
+	if (tids2.size() > mHttpSemaphore)
+	{
+		LLTextureFetchWorker::Compare compare;
+		std::partial_sort(tids2.begin(), tids2.begin() + mHttpSemaphore, tids2.end(), compare);
+	}
+
+	// Release workers up to the high water mark.  Since we aren't
+	// holding any locks at this point, we can be in competition
+	// with other callers.  Do defensive things like getting
+	// refreshed counts of requests and checking if someone else
+	// has moved any worker state around....
+	for (worker_list_t::iterator iter2(tids2.begin()); tids2.end() != iter2; ++iter2)
+	{
+		LLTextureFetchWorker * worker(* iter2);
+
+		worker->lockWorkMutex();										// +Mw
+		if (LLTextureFetchWorker::WAIT_HTTP_RESOURCE2 != worker->mState)
+		{
+			// Not in expected state, remove it, try the next one
+			worker->unlockWorkMutex();									// -Mw
+			LL_WARNS("Texture") << "Resource-waited texture " << worker->mID
+								<< " in unexpected state:  " << worker->mState
+								<< ".  Removing from wait list."
+								<< LL_ENDL;
+			removeHttpWaiter(worker->mID);
+			continue;
+		}
+
+		if (! worker->acquireHttpSemaphore())
+		{
+			// Out of active slots, quit
+			worker->unlockWorkMutex();									// -Mw
+			break;
+		}
+		
+		worker->mState = LLTextureFetchWorker::SEND_HTTP_REQ;
+		worker->setPriority(LLWorkerThread::PRIORITY_HIGH | worker->mWorkPriority);
+		worker->unlockWorkMutex();										// -Mw
+
+		removeHttpWaiter(worker->mID);
+	}
+}
+
+// Threads:  T*
+void LLTextureFetch::cancelHttpWaiters()
+{
+	mNetworkQueueMutex.lock();											// +Mfnq
+	mHttpWaitResource.clear();
+	mNetworkQueueMutex.unlock();										// -Mfnq
+}
+
+// Threads:  T*
+int LLTextureFetch::getHttpWaitersCount()
+{
+	mNetworkQueueMutex.lock();											// +Mfnq
+	int ret(mHttpWaitResource.size());
+	mNetworkQueueMutex.unlock();										// -Mfnq
+	return ret;
+}
+
+
+// Threads:  T*
+void LLTextureFetch::updateStateStats(U32 cache_read, U32 cache_write, U32 res_wait)
+{
+	LLMutexLock lock(&mQueueMutex);										// +Mfq
+
+	mTotalCacheReadCount += cache_read;
+	mTotalCacheWriteCount += cache_write;
+	mTotalResourceWaitCount += res_wait;
+}																		// -Mfq
+
+
+// Threads:  T*
+void LLTextureFetch::getStateStats(U32 * cache_read, U32 * cache_write, U32 * res_wait)
+{
+	U32 ret1(0U), ret2(0U), ret3(0U);
+	
+	{
+		LLMutexLock lock(&mQueueMutex);									// +Mfq
+		ret1 = mTotalCacheReadCount;
+		ret2 = mTotalCacheWriteCount;
+		ret3 = mTotalResourceWaitCount;
+	}																	// -Mfq
+	
+	*cache_read = ret1;
+	*cache_write = ret2;
+	*res_wait = ret3;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 // cross-thread command methods
 
+// Threads:  T*
 void LLTextureFetch::commandSetRegion(U64 region_handle)
 {
 	TFReqSetRegion * req = new TFReqSetRegion(region_handle);
@@ -2845,6 +3589,7 @@ void LLTextureFetch::commandSetRegion(U64 region_handle)
 	cmdEnqueue(req);
 }
 
+// Threads:  T*
 void LLTextureFetch::commandSendMetrics(const std::string & caps_url,
 										const LLUUID & session_id,
 										const LLUUID & agent_id,
@@ -2855,6 +3600,7 @@ void LLTextureFetch::commandSendMetrics(const std::string & caps_url,
 	cmdEnqueue(req);
 }
 
+// Threads:  T*
 void LLTextureFetch::commandDataBreak()
 {
 	// The pedantically correct way to implement this is to create a command
@@ -2865,30 +3611,33 @@ void LLTextureFetch::commandDataBreak()
 	LLTextureFetch::svMetricsDataBreak = true;
 }
 
+// Threads:  T*
 void LLTextureFetch::cmdEnqueue(TFRequest * req)
 {
-	lockQueue();
+	lockQueue();														// +Mfq
 	mCommands.push_back(req);
-	unlockQueue();
+	unlockQueue();														// -Mfq
 
 	unpause();
 }
 
+// Threads:  T*
 LLTextureFetch::TFRequest * LLTextureFetch::cmdDequeue()
 {
 	TFRequest * ret = 0;
 	
-	lockQueue();
+	lockQueue();														// +Mfq
 	if (! mCommands.empty())
 	{
 		ret = mCommands.front();
 		mCommands.erase(mCommands.begin());
 	}
-	unlockQueue();
+	unlockQueue();														// -Mfq
 
 	return ret;
 }
 
+// Threads:  Ttf
 void LLTextureFetch::cmdDoWork()
 {
 	if (mDebugPause)
@@ -2912,6 +3661,37 @@ void LLTextureFetch::cmdDoWork()
 namespace
 {
 
+
+// Example of a simple notification handler for metrics
+// delivery notification.  Earlier versions of the code used
+// a Responder that tried harder to detect delivery breaks
+// but it really isn't that important.  If someone wants to
+// revisit that effort, here is a place to start.
+class AssetReportHandler : public LLCore::HttpHandler
+{
+public:
+
+	// Threads:  Ttf
+	virtual void onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response)
+	{
+		LLCore::HttpStatus status(response->getStatus());
+
+		if (status)
+		{
+			LL_WARNS("Texture") << "Successfully delivered asset metrics to grid."
+								<< LL_ENDL;
+		}
+		else
+		{
+			LL_WARNS("Texture") << "Error delivering asset metrics to grid.  Reason:  "
+								<< status.toString() << LL_ENDL;
+		}
+	}
+}; // end class AssetReportHandler
+
+AssetReportHandler stats_handler;
+
+
 /**
  * Implements the 'Set Region' command.
  *
@@ -2942,75 +3722,8 @@ TFReqSendMetrics::~TFReqSendMetrics()
 bool
 TFReqSendMetrics::doWork(LLTextureFetch * fetcher)
 {
-	/*
-	 * HTTP POST responder.  Doesn't do much but tries to
-	 * detect simple breaks in recording the metrics stream.
-	 *
-	 * The 'volatile' modifiers don't indicate signals,
-	 * mmap'd memory or threads, really.  They indicate that
-	 * the referenced data is part of a pseudo-closure for
-	 * this responder rather than being required for correct
-	 * operation.
-     *
-     * We don't try very hard with the POST request.  We give
-     * it one shot and that's more-or-less it.  With a proper
-     * refactoring of the LLQueuedThread usage, these POSTs
-     * could be put in a request object and made more reliable.
-	 */
-	class lcl_responder : public LLCurl::Responder
-	{
-	public:
-		lcl_responder(LLTextureFetch * fetcher,
-					  S32 expected_sequence,
-                      volatile const S32 & live_sequence,
-                      volatile bool & reporting_break,
-					  volatile bool & reporting_started)
-			: LLCurl::Responder(),
-			  mFetcher(fetcher),
-              mExpectedSequence(expected_sequence),
-              mLiveSequence(live_sequence),
-			  mReportingBreak(reporting_break),
-			  mReportingStarted(reporting_started)
-			{
-                mFetcher->incrCurlPOSTCount();
-            }
-        
-        ~lcl_responder()
-            {
-				LL_CHECK_MEMORY
-                mFetcher->decrCurlPOSTCount();
-				LL_CHECK_MEMORY
-            }
-
-		// virtual
-		void error(U32 status_num, const std::string & reason)
-			{
-                if (mLiveSequence == mExpectedSequence)
-                {
-                    mReportingBreak = true;
-                }
-				LL_WARNS("Texture") << "Break in metrics stream due to POST failure to metrics collection service.  Reason:  "
-									<< reason << LL_ENDL;
-			}
-
-		// virtual
-		void result(const LLSD & content)
-			{
-                if (mLiveSequence == mExpectedSequence)
-                {
-                    mReportingBreak = false;
-                    mReportingStarted = true;
-                }
-			}
-
-	private:
-		LLTextureFetch * mFetcher;
-        S32 mExpectedSequence;
-        volatile const S32 & mLiveSequence;
-		volatile bool & mReportingBreak;
-		volatile bool & mReportingStarted;
-
-	}; // class lcl_responder
+	static const U32 report_priority(1);
+	static LLCore::HttpHandler * const handler(fetcher->isQAMode() || true ? &stats_handler : NULL);
 	
 	if (! gViewerAssetStatsThread1)
 		return true;
@@ -3038,21 +3751,26 @@ TFReqSendMetrics::doWork(LLTextureFetch * fetcher)
 	// Update sequence number
 	if (S32_MAX == ++report_sequence)
 		report_sequence = 0;
-
+	reporting_started = true;
+	
 	// Limit the size of the stats report if necessary.
 	merged_llsd["truncated"] = truncate_viewer_metrics(10, merged_llsd);
 
 	if (! mCapsURL.empty())
 	{
-		LLCurlRequest::headers_t headers;
-		fetcher->getCurlRequest().post(mCapsURL,
-									   headers,
-									   merged_llsd,
-									   new lcl_responder(fetcher,
-														 report_sequence,
-                                                         report_sequence,
-                                                         LLTextureFetch::svMetricsDataBreak,
-														 reporting_started));
+		LLCore::BufferArray * ba = new LLCore::BufferArray;
+		LLCore::BufferArrayStream bas(ba);
+		LLSDSerialize::toXML(merged_llsd, bas);
+		
+		fetcher->getHttpRequest().requestPost(fetcher->getPolicyClass(),
+											  report_priority,
+											  mCapsURL,
+											  ba,
+											  NULL,
+											  fetcher->getMetricsHeaders(),
+											  handler);
+		ba->release();
+		LLTextureFetch::svMetricsDataBreak = false;
 	}
 	else
 	{
@@ -3110,6 +3828,7 @@ truncate_viewer_metrics(int max_regions, LLSD & metrics)
 
 } // end of anonymous namespace
 
+
 ///////////////////////////////////////////////////////////////////////////////////////////
 //Start LLTextureFetchDebugger
 ///////////////////////////////////////////////////////////////////////////////////////////
@@ -3163,48 +3882,13 @@ private:
 	S32 mID;
 };
 
-class LLDebuggerHTTPResponder : public LLCurl::Responder
-{
-public:
-	LLDebuggerHTTPResponder(LLTextureFetchDebugger* debugger, S32 index)
-	: mDebugger(debugger), mIndex(index)
-	{
-	}
-	virtual void completedRaw(U32 status, const std::string& reason,
-							  const LLChannelDescriptors& channels,
-							  const LLIOPipe::buffer_ptr_t& buffer)
-	{
-		bool success = false;
-		bool partial = false;
-		if (HTTP_OK <= status &&  status < HTTP_MULTIPLE_CHOICES)
-		{
-			success = true;
-			if (HTTP_PARTIAL_CONTENT == status) // partial information
-			{
-				partial = true;
-			}
-		}
-		if (!success)
-		{
-			llinfos << "Fetch Debugger : CURL GET FAILED, index = " << mIndex << ", status:" << status << " reason:" << reason << llendl;
-		}
-		mDebugger->callbackHTTP(mIndex, channels, buffer, partial, success);
-		mDebugger->getCurlGetRequest()->completeRequest(0);
-	}
-	virtual bool followRedir()
-	{
-		return true;
-	}
-private:
-	LLTextureFetchDebugger* mDebugger;
-	S32 mIndex;
-};
 
 LLTextureFetchDebugger::LLTextureFetchDebugger(LLTextureFetch* fetcher, LLTextureCache* cache, LLImageDecodeThread* imagedecodethread) :
 	mFetcher(fetcher),
 	mTextureCache(cache),
 	mImageDecodeThread(imagedecodethread),
-	mCurlGetRequest(NULL)
+	mHttpHeaders(NULL),
+	mHttpPolicyClass(fetcher->getPolicyClass())
 {
 	init();
 }
@@ -3214,6 +3898,11 @@ LLTextureFetchDebugger::~LLTextureFetchDebugger()
 	mFetchingHistory.clear();
 	mStopDebug = TRUE;
 	tryToStopDebug();
+	if (mHttpHeaders)
+	{
+		mHttpHeaders->release();
+		mHttpHeaders = NULL;
+	}
 }
 
 void LLTextureFetchDebugger::init()
@@ -3251,6 +3940,12 @@ void LLTextureFetchDebugger::init()
 	mFreezeHistory = FALSE;
 	mStopDebug = FALSE;
 	mClearHistory = FALSE;
+
+	if (! mHttpHeaders)
+	{
+		mHttpHeaders = new LLCore::HttpHeaders;
+		mHttpHeaders->mHeaders.push_back("Accept: image/x-j2c");
+	}
 }
 
 void LLTextureFetchDebugger::startWork(e_debug_state state)
@@ -3388,7 +4083,7 @@ void LLTextureFetchDebugger::tryToStopDebug()
 			{
 				mTextureCache->readComplete(mFetchingHistory[i].mCacheHandle, true);
 			}
-		}	
+ 		}	
 		break;
 	case WRITE_CACHE:
 		for(S32 i = 0 ; i < size; i++)
@@ -3430,6 +4125,7 @@ void LLTextureFetchDebugger::tryToStopDebug()
 		if(mClearHistory)
 		{
 			mFetchingHistory.clear();
+			mHandleToFetchIndex.clear();
 			init();	
 			mTotalFetchingTime = gDebugTimers[0].getElapsedTimeF32(); //reset
 		}
@@ -3608,6 +4304,7 @@ void LLTextureFetchDebugger::debugHTTP()
 		mFetchingHistory[i].mCurlState = FetchEntry::CURL_NOT_DONE;
 		mFetchingHistory[i].mCurlReceivedSize = 0;
 		mFetchingHistory[i].mHTTPFailCount = 0;
+		mFetchingHistory[i].mFormattedImage = NULL;
 	}
 	mNbCurlRequests = 0;
 	mNbCurlCompleted = 0;
@@ -3622,15 +4319,12 @@ S32 LLTextureFetchDebugger::fillCurlQueue()
 		mNbCurlCompleted = mFetchingHistory.size();
 		return 0;
 	}
-	S32 size = mFetchingHistory.size();
-
-	if (mNbCurlRequests == size) //all issued
+	if (mNbCurlRequests > HTTP_REQUESTS_IN_QUEUE_LOW_WATER)
 	{
-		return 0;
-	}	
+		return mNbCurlRequests;
+	}
 	
-	S32 counter = 8;
-	mNbCurlRequests = 0;
+	S32 size = mFetchingHistory.size();
 	for (S32 i = 0 ; i < size ; i++)
 	{		
 		mNbCurlRequests++;
@@ -3645,13 +4339,28 @@ S32 LLTextureFetchDebugger::fillCurlQueue()
 		requestedSize = llmax(0,requestedSize);
 		// We request the whole file if the size was set to an absurdly high value (meaning all file)
 		requestedSize = (requestedSize == 33554432 ? 0 : requestedSize);
-		std::vector<std::string> headers;
-		headers.push_back("Accept: image/x-j2c");
-		mCurlGetRequest->getByteRange(texture_url, headers, 0, requestedSize, 0x10000, new LLDebuggerHTTPResponder(this, i));
-		
-		mFetchingHistory[i].mCurlState = FetchEntry::CURL_IN_PROGRESS;
-		counter--;
-		if(counter < 1)
+
+		LLCore::HttpHandle handle = mFetcher->getHttpRequest().requestGetByteRange(mHttpPolicyClass,
+																				   LLWorkerThread::PRIORITY_LOWBITS,
+																				   texture_url,
+																				   0,
+																				   requestedSize,
+																				   NULL,
+																				   mHttpHeaders,
+																				   this);
+		if (LLCORE_HTTP_HANDLE_INVALID != handle)
+		{
+			mHandleToFetchIndex[handle] = i;
+			mFetchingHistory[i].mHttpHandle = handle;
+			mFetchingHistory[i].mCurlState = FetchEntry::CURL_IN_PROGRESS;
+			mNbCurlRequests++;
+			// Hack
+			if (mNbCurlRequests == HTTP_REQUESTS_IN_QUEUE_HIGH_WATER)	// emulate normal pipeline
+			{
+				break;
+			}
+		}
+		else 
 		{
 			break;
 		}
@@ -3881,9 +4590,8 @@ bool LLTextureFetchDebugger::update(F32 max_time)
 		}
 		break;
 	case HTTP_FETCHING:
-		mCurlGetRequest->process();
-		mCurlGetRequest->nextRequests();
-		LLCurl::getCurlThread()->update(1);
+		// Do some notifications...
+		mFetcher->getHttpRequest().update(10);
 		if (!fillCurlQueue() && mNbCurlCompleted == mFetchingHistory.size())
 		{
 			mHTTPTime =  mTimer.getElapsedTimeF32() ;
@@ -3954,6 +4662,28 @@ bool LLTextureFetchDebugger::update(F32 max_time)
 	return mState == IDLE;
 }
 
+void LLTextureFetchDebugger::onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response)
+{
+	handle_fetch_map_t::iterator iter(mHandleToFetchIndex.find(handle));
+	if (mHandleToFetchIndex.end() == iter)
+	{
+		llinfos << "Fetch Debugger : Couldn't find handle " << handle << " in fetch list." << llendl;
+		return;
+	}
+	
+	S32 fetch_ind(iter->second);
+	mHandleToFetchIndex.erase(iter);
+	if (fetch_ind >= mFetchingHistory.size() || mFetchingHistory[fetch_ind].mHttpHandle != handle)
+	{
+		llinfos << "Fetch Debugger : Handle and fetch object in disagreement.  Punting." << llendl;
+	}
+	else
+	{
+		callbackHTTP(mFetchingHistory[fetch_ind], response);
+		mFetchingHistory[fetch_ind].mHttpHandle = LLCORE_HTTP_HANDLE_INVALID;	// Not valid after notification
+	}
+}
+
 void LLTextureFetchDebugger::callbackCacheRead(S32 id, bool success, LLImageFormatted* image,
 						   S32 imagesize, BOOL islocal)
 {
@@ -3980,50 +4710,60 @@ void LLTextureFetchDebugger::callbackDecoded(S32 id, bool success, LLImageRaw* r
 	}
 }
 
-void LLTextureFetchDebugger::callbackHTTP(S32 id, const LLChannelDescriptors& channels,
-										  const LLIOPipe::buffer_ptr_t& buffer, 
-										  bool partial, bool success)
+void LLTextureFetchDebugger::callbackHTTP(FetchEntry & fetch, LLCore::HttpResponse * response)
 {
-	if (success)
+	static const LLCore::HttpStatus par_status(HTTP_PARTIAL_CONTENT);
+	
+	LLCore::HttpStatus status(response->getStatus());
+	mNbCurlRequests--;
+	if (status)
 	{
-		mFetchingHistory[id].mCurlState = FetchEntry::CURL_DONE;
+		const bool partial(par_status == status);
+		LLCore::BufferArray * ba(response->getBody());	// *Not* holding reference to body
+		
+		fetch.mCurlState = FetchEntry::CURL_DONE;
 		mNbCurlCompleted++;
 
-		S32 data_size = buffer->countAfter(channels.in(), NULL);
-		mFetchingHistory[id].mCurlReceivedSize += data_size;
-		//llinfos << "Fetch Debugger : got results for " << id << ", data_size = " << data_size << ", received = " << mFetchingHistory[id].mCurlReceivedSize << ", requested = " << mFetchingHistory[id].mRequestedSize << ", partial = " << partial << llendl;
-		if ((mFetchingHistory[id].mCurlReceivedSize >= mFetchingHistory[id].mRequestedSize) || !partial || (mFetchingHistory[id].mRequestedSize == 600))
+		S32 data_size = ba ? ba->size() : 0;
+		fetch.mCurlReceivedSize += data_size;
+		//llinfos << "Fetch Debugger : got results for " << fetch.mID << ", data_size = " << data_size << ", received = " << fetch.mCurlReceivedSize << ", requested = " << fetch.mRequestedSize << ", partial = " << partial << llendl;
+		if ((fetch.mCurlReceivedSize >= fetch.mRequestedSize) || !partial || (fetch.mRequestedSize == 600))
 		{
 			U8* d_buffer = (U8*)ALLOCATE_MEM(LLImageBase::getPrivatePool(), data_size);
-			buffer->readAfter(channels.in(), NULL, d_buffer, data_size);
+			if (ba)
+			{
+				ba->read(0, d_buffer, data_size);
+			}
 			
-			mFetchingHistory[id].mFormattedImage = NULL;
+			llassert_always(fetch.mFormattedImage.isNull());
 			{
 				// For now, create formatted image based on extension
-				std::string texture_url = mHTTPUrl + "/?texture_id=" + mFetchingHistory[id].mID.asString().c_str();
+				std::string texture_url = mHTTPUrl + "/?texture_id=" + fetch.mID.asString().c_str();
 				std::string extension = gDirUtilp->getExtension(texture_url);
-				mFetchingHistory[id].mFormattedImage = LLImageFormatted::createFromType(LLImageBase::getCodecFromExtension(extension));
-				if (mFetchingHistory[id].mFormattedImage.isNull())
+				fetch.mFormattedImage = LLImageFormatted::createFromType(LLImageBase::getCodecFromExtension(extension));
+				if (fetch.mFormattedImage.isNull())
 				{
-					mFetchingHistory[id].mFormattedImage = new LLImageJ2C; // default
+					fetch.mFormattedImage = new LLImageJ2C; // default
 				}
 			}
 						
-			mFetchingHistory[id].mFormattedImage->setData(d_buffer, data_size);	
+			fetch.mFormattedImage->setData(d_buffer, data_size);	
 		}
 	}
 	else //failed
 	{
-		mFetchingHistory[id].mHTTPFailCount++;
-		if(mFetchingHistory[id].mHTTPFailCount < 5)
+		llinfos << "Fetch Debugger : CURL GET FAILED,  ID = " << fetch.mID
+				<< ", status: " << status.toHex()
+				<< " reason:  " << status.toString() << llendl;
+		fetch.mHTTPFailCount++;
+		if(fetch.mHTTPFailCount < 5)
 		{
 			// Fetch will have to be redone
-			mFetchingHistory[id].mCurlState = FetchEntry::CURL_NOT_DONE;
-			mNbCurlRequests--;	
+			fetch.mCurlState = FetchEntry::CURL_NOT_DONE;
 		}
 		else //skip
 		{
-			mFetchingHistory[id].mCurlState = FetchEntry::CURL_DONE;
+			fetch.mCurlState = FetchEntry::CURL_DONE;
 			mNbCurlCompleted++;
 		}
 	}
diff --git a/indra/newview/lltexturefetch.h b/indra/newview/lltexturefetch.h
index f5072a79f1..3a99432b48 100644
--- a/indra/newview/lltexturefetch.h
+++ b/indra/newview/lltexturefetch.h
@@ -4,7 +4,7 @@
  *
  * $LicenseInfo:firstyear=2000&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
+ * Copyright (C) 2012, Linden Research, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -27,19 +27,24 @@
 #ifndef LL_LLTEXTUREFETCH_H
 #define LL_LLTEXTUREFETCH_H
 
+#include <vector>
+#include <map>
+
 #include "lldir.h"
 #include "llimage.h"
 #include "lluuid.h"
 #include "llworkerthread.h"
-#include "llcurl.h"
 #include "lltextureinfo.h"
 #include "llapr.h"
 #include "llimageworker.h"
-//#include "lltexturecache.h"
+#include "llcurl.h"
+#include "httprequest.h"
+#include "httpoptions.h"
+#include "httpheaders.h"
+#include "httphandler.h"
 
 class LLViewerTexture;
 class LLTextureFetchWorker;
-class HTTPGetResponder;
 class LLImageDecodeThread;
 class LLHost;
 class LLViewerAssetStats;
@@ -47,10 +52,10 @@ class LLTextureFetchDebugger;
 class LLTextureCache;
 
 // Interface class
+
 class LLTextureFetch : public LLWorkerThread
 {
 	friend class LLTextureFetchWorker;
-	friend class HTTPGetResponder;
 	
 public:
 	LLTextureFetch(LLTextureCache* cache, LLImageDecodeThread* imagedecodethread, bool threaded, bool qa_mode);
@@ -58,70 +63,201 @@ public:
 
 	class TFRequest;
 	
-	/*virtual*/ S32 update(F32 max_time_ms);	
-	void shutDownTextureCacheThread() ; //called in the main thread after the TextureCacheThread shuts down.
-	void shutDownImageDecodeThread() ;  //called in the main thread after the ImageDecodeThread shuts down.
+    // Threads:  Tmain
+	/*virtual*/ S32 update(F32 max_time_ms);
+	
+	// called in the main thread after the TextureCacheThread shuts down.
+    // Threads:  Tmain
+	void shutDownTextureCacheThread();
+
+	//called in the main thread after the ImageDecodeThread shuts down.
+    // Threads:  Tmain
+	void shutDownImageDecodeThread();
 
+	// Threads:  T* (but Tmain mostly)
 	bool createRequest(const std::string& url, const LLUUID& id, const LLHost& host, F32 priority,
 					   S32 w, S32 h, S32 c, S32 discard, bool needs_aux, bool can_use_http);
+
+	// Requests that a fetch operation be deleted from the queue.
+	// If @cancel is true, also stops any I/O operations pending.
+	// Actual delete will be scheduled and performed later.
+	//
+	// Note:  This *looks* like an override/variant of the
+	// base class's deleteRequest() but is functionally quite
+	// different.
+	//
+	// Threads:  T*
 	void deleteRequest(const LLUUID& id, bool cancel);
+
 	void deleteAllRequests();
+
+	// Threads:  T*
 	bool getRequestFinished(const LLUUID& id, S32& discard_level,
 							LLPointer<LLImageRaw>& raw, LLPointer<LLImageRaw>& aux);
+
+	// Threads:  T*
 	bool updateRequestPriority(const LLUUID& id, F32 priority);
 
+    // Threads:  T*
 	bool receiveImageHeader(const LLHost& host, const LLUUID& id, U8 codec, U16 packets, U32 totalbytes, U16 data_size, U8* data);
+
+    // Threads:  T*
 	bool receiveImagePacket(const LLHost& host, const LLUUID& id, U16 packet_num, U16 data_size, U8* data);
 
+    // Threads:  T* (but not safe)
 	void setTextureBandwidth(F32 bandwidth) { mTextureBandwidth = bandwidth; }
+	
+    // Threads:  T* (but not safe)
 	F32 getTextureBandwidth() { return mTextureBandwidth; }
 	
-	// Debug
+    // Threads:  T*
 	BOOL isFromLocalCache(const LLUUID& id);
+
+	// @return	Magic number giving the internal state of the
+	//			request.  We should make these codes public if we're
+	//			going to return them as a status value.
+	//
+    // Threads:  T*
 	S32 getFetchState(const LLUUID& id, F32& decode_progress_p, F32& requested_priority_p,
 					  U32& fetch_priority_p, F32& fetch_dtime_p, F32& request_dtime_p, bool& can_use_http);
+
+	// Debug utility - generally not safe
 	void dump();
-	S32 getNumRequests() ;
+
+	// Threads:  T*
+	S32 getNumRequests();
+
+	// Threads:  T*
+	S32 getNumHTTPRequests();
+
+	// Threads:  T*
+	U32 getTotalNumHTTPRequests();
 	
-	// Public for access by callbacks
+    // Threads:  T*
     S32 getPending();
+
+    // Threads:  T*
 	void lockQueue() { mQueueMutex.lock(); }
+
+    // Threads:  T*
 	void unlockQueue() { mQueueMutex.unlock(); }
+
+	// Threads:  T*
 	LLTextureFetchWorker* getWorker(const LLUUID& id);
+	
+	// Threads:  T*
+	// Locks:  Mfq
 	LLTextureFetchWorker* getWorkerAfterLock(const LLUUID& id);
 
-	LLTextureInfo* getTextureInfo() { return &mTextureInfo; }
-
 	// Commands available to other threads to control metrics gathering operations.
+
+	// Threads:  T*
 	void commandSetRegion(U64 region_handle);
+
+	// Threads:  T*
 	void commandSendMetrics(const std::string & caps_url,
 							const LLUUID & session_id,
 							const LLUUID & agent_id,
 							LLViewerAssetStats * main_stats);
+
+	// Threads:  T*
 	void commandDataBreak();
 
-	LLCurlTextureRequest & getCurlRequest()	{ return *mCurlGetRequest; }
+	// Threads:  T*
+	LLCore::HttpRequest & getHttpRequest()	{ return *mHttpRequest; }
+
+	// Threads:  T*
+	LLCore::HttpRequest::policy_t getPolicyClass() const { return mHttpPolicyClass; }
+	
+	// Return a pointer to the shared metrics headers definition.
+	// Does not increment the reference count, caller is required
+	// to do that to hold a reference for any length of time.
+	//
+	// Threads:  T*
+	LLCore::HttpHeaders * getMetricsHeaders() const	{ return mHttpMetricsHeaders; }
 
 	bool isQAMode() const				{ return mQAMode; }
 
-	// Curl POST counter maintenance
-	inline void incrCurlPOSTCount()		{ mCurlPOSTRequestCount++; }
-	inline void decrCurlPOSTCount()		{ mCurlPOSTRequestCount--; }
+	// ----------------------------------
+	// HTTP resource waiting methods
+
+    // Threads:  T*
+	void addHttpWaiter(const LLUUID & tid);
+
+    // Threads:  T*
+	void removeHttpWaiter(const LLUUID & tid);
 
+    // Threads:  T*
+	bool isHttpWaiter(const LLUUID & tid);
+
+	// If there are slots, release one or more LLTextureFetchWorker
+	// requests from resource wait state (WAIT_HTTP_RESOURCE) to
+	// active (SEND_HTTP_REQ).
+	//
+	// Because this will modify state of many workers, you may not
+	// hold any Mw lock while calling.  This makes it a little
+	// inconvenient to use but that's the rule.
+	//
+    // Threads:  T*
+	// Locks:  -Mw (must not hold any worker when called)
+	void releaseHttpWaiters();
+
+    // Threads:  T*
+	void cancelHttpWaiters();
+
+    // Threads:  T*
+	int getHttpWaitersCount();
+	// ----------------------------------
+	// Stats management
+
+	// Add given counts to the global totals for the states/requests
+	// Threads:  T*
+	void updateStateStats(U32 cache_read, U32 cache_write, U32 res_wait);
+
+	// Return the global counts
+	// Threads:  T*
+	void getStateStats(U32 * cache_read, U32 * cache_write, U32 * res_wait);
+
+	// ----------------------------------
+	
 protected:
+	// Threads:  T* (but Ttf in practice)
 	void addToNetworkQueue(LLTextureFetchWorker* worker);
+
+	// Threads:  T*
 	void removeFromNetworkQueue(LLTextureFetchWorker* worker, bool cancel);
+
+    // Threads:  T*
 	void addToHTTPQueue(const LLUUID& id);
-	void removeRequest(LLTextureFetchWorker* worker, bool cancel);
 
+	// XXX possible delete
+    // Threads:  T*
+	void removeFromHTTPQueue(const LLUUID& id, S32 received_size);
+
+	// Identical to @deleteRequest but with different arguments
+	// (caller already has the worker pointer).
+	//
+	// Threads:  T*
+	void removeRequest(LLTextureFetchWorker* worker, bool cancel);
+	
 	// Overrides from the LLThread tree
+	// Locks:  Ct
 	bool runCondition();
 
 private:
+    // Threads:  Tmain
 	void sendRequestListToSimulators();
+	
+	// Threads:  Ttf
 	/*virtual*/ void startThread(void);
+	
+	// Threads:  Ttf
 	/*virtual*/ void endThread(void);
+	
+	// Threads:  Ttf
 	/*virtual*/ void threadedUpdate(void);
+
+	// Threads:  Ttf
 	void commonUpdate();
 
 	// Metrics command helpers
@@ -132,6 +268,8 @@ private:
 	 * Takes ownership of the TFRequest object.
 	 *
 	 * Method locks the command queue.
+	 *
+	 * Threads:  T*
 	 */
 	void cmdEnqueue(TFRequest *);
 
@@ -142,6 +280,8 @@ private:
 	 * Caller acquires ownership of the object and must dispose of it.
 	 *
 	 * Method locks the command queue.
+	 *
+	 * Threads:  T*
 	 */
 	TFRequest * cmdDequeue();
 
@@ -151,6 +291,8 @@ private:
 	 * additional commands.
 	 *
 	 * Method locks the command queue.
+	 *
+	 * Threads:  Ttf
 	 */
 	void cmdDoWork();
 	
@@ -170,38 +312,64 @@ private:
 
 	LLTextureCache* mTextureCache;
 	LLImageDecodeThread* mImageDecodeThread;
-	LLCurlTextureRequest* mCurlGetRequest;
-
+	
 	// Map of all requests by UUID
 	typedef std::map<LLUUID,LLTextureFetchWorker*> map_t;
-	map_t mRequestMap;
+	map_t mRequestMap;													// Mfq
 
 	// Set of requests that require network data
 	typedef std::set<LLUUID> queue_t;
-	queue_t mNetworkQueue;
-	queue_t mHTTPTextureQueue;
+	queue_t mNetworkQueue;												// Mfnq
+	queue_t mHTTPTextureQueue;											// Mfnq
 	typedef std::map<LLHost,std::set<LLUUID> > cancel_queue_t;
-	cancel_queue_t mCancelQueue;
-	F32 mTextureBandwidth;
-	F32 mMaxBandwidth;
+	cancel_queue_t mCancelQueue;										// Mfnq
+	F32 mTextureBandwidth;												// <none>
+	F32 mMaxBandwidth;													// Mfnq
 	LLTextureInfo mTextureInfo;
 
+	// XXX possible delete
+	U32 mHTTPTextureBits;												// Mfnq
+
+	// XXX possible delete
+	//debug use
+	U32 mTotalHTTPRequests;
+
 	// Out-of-band cross-thread command queue.  This command queue
 	// is logically tied to LLQueuedThread's list of
 	// QueuedRequest instances and so must be covered by the
 	// same locks.
 	typedef std::vector<TFRequest *> command_queue_t;
-	command_queue_t mCommands;
+	command_queue_t mCommands;											// Mfq
 
 	// If true, modifies some behaviors that help with QA tasks.
 	const bool mQAMode;
 
-	// Count of POST requests outstanding.  We maintain the count
-	// indirectly in the CURL request responder's ctor and dtor and
-	// use it when determining whether or not to sleep the thread.  Can't
-	// use the LLCurl module's request counter as it isn't thread compatible.
-	// *NOTE:  Don't mix Atomic and static, apr_initialize must be called first.
-	LLAtomic32<S32> mCurlPOSTRequestCount;
+	// Interfaces and objects into the core http library used
+	// to make our HTTP requests.  These replace the various
+	// LLCurl interfaces used in the past.
+	LLCore::HttpRequest *				mHttpRequest;					// Ttf
+	LLCore::HttpOptions *				mHttpOptions;					// Ttf
+	LLCore::HttpHeaders *				mHttpHeaders;					// Ttf
+	LLCore::HttpHeaders *				mHttpMetricsHeaders;			// Ttf
+	LLCore::HttpRequest::policy_t		mHttpPolicyClass;				// T*
+
+	// We use a resource semaphore to keep HTTP requests in
+	// WAIT_HTTP_RESOURCE2 if there aren't sufficient slots in the
+	// transport.  This keeps them near where they can be cheaply
+	// reprioritized rather than dumping them all across a thread
+	// where it's more expensive to get at them.  Requests in either
+	// SEND_HTTP_REQ or WAIT_HTTP_REQ charge against the semaphore
+	// and tracking state transitions is critical to liveness.
+	LLAtomicS32							mHttpSemaphore;					// Ttf + Tmain
+	
+	typedef std::set<LLUUID> wait_http_res_queue_t;
+	wait_http_res_queue_t				mHttpWaitResource;				// Mfnq
+
+	// Cumulative stats on the states/requests issued by
+	// textures running through here.
+	U32 mTotalCacheReadCount;											// Mfq
+	U32 mTotalCacheWriteCount;											// Mfq
+	U32 mTotalResourceWaitCount;										// Mfq
 	
 public:
 	// A probabilistically-correct indicator that the current
@@ -237,7 +405,7 @@ public:
 
 //debug use
 class LLViewerFetchedTexture;
-class LLTextureFetchDebugger
+class LLTextureFetchDebugger : public LLCore::HttpHandler
 {
 	friend class LLTextureFetch;
 public:
@@ -282,11 +450,13 @@ private:
 		e_curl_state mCurlState;
 		S32 mCurlReceivedSize;
 		S32 mHTTPFailCount;
+		LLCore::HttpHandle mHttpHandle;
 
 		FetchEntry() :
 			mDecodedLevel(-1),
 			mFetchedSize(0),
-			mDecodedSize(0)
+			mDecodedSize(0),
+			mHttpHandle(LLCORE_HTTP_HANDLE_INVALID)
 			{}
 		FetchEntry(LLUUID& id, S32 r_size, /*S32 f_discard, S32 c,*/ S32 level, S32 f_size, S32 d_size) :
 			mID(id),
@@ -295,10 +465,15 @@ private:
 			mFetchedSize(f_size),
 			mDecodedSize(d_size),
 			mNeedsAux(false),
-			mHTTPFailCount(0)
+			mHTTPFailCount(0),
+			mHttpHandle(LLCORE_HTTP_HANDLE_INVALID)
 			{}
 	};
-	std::vector<FetchEntry> mFetchingHistory;
+	typedef std::vector<FetchEntry> fetch_list_t;
+	fetch_list_t mFetchingHistory;
+
+	typedef std::map<LLCore::HttpHandle, S32> handle_fetch_map_t;
+	handle_fetch_map_t mHandleToFetchIndex;
 	
 	e_debug_state mState;
 	
@@ -319,7 +494,8 @@ private:
 	LLTextureFetch* mFetcher;
 	LLTextureCache* mTextureCache;
 	LLImageDecodeThread* mImageDecodeThread;
-	LLCurlTextureRequest* mCurlGetRequest;
+	LLCore::HttpHeaders* mHttpHeaders;
+	LLCore::HttpRequest::policy_t mHttpPolicyClass;
 	
 	S32 mNumFetchedTextures;
 	S32 mNumCacheHits;
@@ -359,21 +535,18 @@ public:
 	void clearHistory();
 	void addHistoryEntry(LLTextureFetchWorker* worker);
 	
-	void setCurlGetRequest(LLCurlTextureRequest* request) { mCurlGetRequest = request;}
-	LLCurlTextureRequest* getCurlGetRequest() { return mCurlGetRequest;}
+	// Inherited from LLCore::HttpHandler
+	// Threads:  Ttf
+	virtual void onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response);
 
 	void startWork(e_debug_state state);
 	void setStopDebug() {mStopDebug = TRUE;}
 	void tryToStopDebug(); //stop everything
-	
 	void callbackCacheRead(S32 id, bool success, LLImageFormatted* image,
 						   S32 imagesize, BOOL islocal);
 	void callbackCacheWrite(S32 id, bool success);
 	void callbackDecoded(S32 id, bool success, LLImageRaw* raw, LLImageRaw* aux);
-	void callbackHTTP(S32 id, const LLChannelDescriptors& channels,
-					  const LLIOPipe::buffer_ptr_t& buffer, 
-					  bool partial, bool success);
-	
+	void callbackHTTP(FetchEntry & fetch, LLCore::HttpResponse * response);
 
 	e_debug_state getState()             {return mState;}
 	S32  getNumFetchedTextures()         {return mNumFetchedTextures;}
diff --git a/indra/newview/lltextureview.cpp b/indra/newview/lltextureview.cpp
index c60b4155a0..16c42dbd43 100755
--- a/indra/newview/lltextureview.cpp
+++ b/indra/newview/lltextureview.cpp
@@ -4,7 +4,7 @@
  *
  * $LicenseInfo:firstyear=2001&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
+ * Copyright (C) 2012, Linden Research, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -74,7 +74,7 @@ static std::string title_string4("  W x H (Dis) Mem");
 static S32 title_x1 = 0;
 static S32 title_x2 = 460;
 static S32 title_x3 = title_x2 + 40;
-static S32 title_x4 = title_x3 + 50;
+static S32 title_x4 = title_x3 + 46;
 static S32 texture_bar_height = 8;
 
 ////////////////////////////////////////////////////////////////////////////
@@ -232,6 +232,8 @@ void LLTextureBar::draw()
 		{ "DSK", LLColor4::blue },	// CACHE_POST
 		{ "NET", LLColor4::green },	// LOAD_FROM_NETWORK
 		{ "SIM", LLColor4::green },	// LOAD_FROM_SIMULATOR
+		{ "HTW", LLColor4::green },	// WAIT_HTTP_RESOURCE
+		{ "HTW", LLColor4::green },	// WAIT_HTTP_RESOURCE2
 		{ "REQ", LLColor4::yellow },// SEND_HTTP_REQ
 		{ "HTP", LLColor4::green },	// WAIT_HTTP_REQ
 		{ "DEC", LLColor4::yellow },// DECODE_IMAGE
@@ -239,7 +241,7 @@ void LLTextureBar::draw()
 		{ "WRT", LLColor4::purple },// WRITE_TO_CACHE
 		{ "WRT", LLColor4::orange },// WAIT_ON_WRITE
 		{ "END", LLColor4::red },   // DONE
-#define LAST_STATE 12
+#define LAST_STATE 14
 		{ "CRE", LLColor4::magenta }, // LAST_STATE+1
 		{ "FUL", LLColor4::green }, // LAST_STATE+2
 		{ "BAD", LLColor4::red }, // LAST_STATE+3
@@ -345,7 +347,7 @@ void LLTextureBar::draw()
 		
 		// draw the image size at the end
 		{
-			std::string num_str = llformat("%3dx%3d (%d) %7d", mImagep->getWidth(), mImagep->getHeight(),
+			std::string num_str = llformat("%3dx%3d (%2d) %7d", mImagep->getWidth(), mImagep->getHeight(),
 				mImagep->getDiscardLevel(), mImagep->hasGLTexture() ? mImagep->getTextureMemory() : 0);
 			LLFontGL::getFontMonospace()->renderUTF8(num_str, 0, title_x4, getRect().getHeight(), color,
 											LLFontGL::LEFT, LLFontGL::TOP);
@@ -514,14 +516,18 @@ void LLGLTexMemBar::draw()
 	S32 v_offset = 0;//(S32)((texture_bar_height + 2.2f) * mTextureView->mNumTextureBars + 2.0f);
 	F32 total_texture_downloaded = (F32)gTotalTextureBytes / (1024 * 1024);
 	F32 total_object_downloaded = (F32)gTotalObjectBytes / (1024 * 1024);
-	U32 total_http_requests = LLAppViewer::getTextureFetch()->getCurlRequest().getTotalIssuedRequests() ;
+	U32 total_http_requests = LLAppViewer::getTextureFetch()->getTotalNumHTTPRequests();
 	//----------------------------------------------------------------------------
 	LLGLSUIDefault gls_ui;
 	LLColor4 text_color(1.f, 1.f, 1.f, 0.75f);
 	LLColor4 color;
-	
-	std::string text = "";
 
+	// Gray background using completely magic numbers
+	gGL.color4f(0.f, 0.f, 0.f, 0.25f);
+	// const LLRect & rect(getRect());
+	// gl_rect_2d(-4, v_offset, rect.mRight - rect.mLeft + 2, v_offset + line_height*4);
+
+	std::string text = "";
 	LLFontGL::getFontMonospace()->renderUTF8(text, 0, 0, v_offset + line_height*6,
 											 text_color, LLFontGL::LEFT, LLFontGL::TOP);
 
@@ -531,14 +537,26 @@ void LLGLTexMemBar::draw()
 					bound_mem,
 					max_bound_mem,
 					LLRenderTarget::sBytesAllocated/(1024*1024),
-					LLImageRaw::sGlobalRawMemory >> 20,	discard_bias,
-					cache_usage, cache_max_usage);
+					LLImageRaw::sGlobalRawMemory >> 20,
+					discard_bias,
+					cache_usage,
+					cache_max_usage);
+	//, cache_entries, cache_max_entries
+
 	LLFontGL::getFontMonospace()->renderUTF8(text, 0, 0, v_offset + line_height*4,
 											 text_color, LLFontGL::LEFT, LLFontGL::TOP);
 
-	text = llformat("Net Tot Tex: %.1f MB Tot Obj: %.1f MB Tot Htp: %d",
-					total_texture_downloaded, total_object_downloaded, total_http_requests);
-	//, cache_entries, cache_max_entries
+	U32 cache_read(0U), cache_write(0U), res_wait(0U);
+	LLAppViewer::getTextureFetch()->getStateStats(&cache_read, &cache_write, &res_wait);
+	
+	text = llformat("Net Tot Tex: %.1f MB Tot Obj: %.1f MB Tot Htp: %d Cread: %u Cwrite: %u Rwait: %u",
+					total_texture_downloaded,
+					total_object_downloaded,
+					total_http_requests,
+					cache_read,
+					cache_write,
+					res_wait);
+
 	LLFontGL::getFontMonospace()->renderUTF8(text, 0, 0, v_offset + line_height*3,
 											 text_color, LLFontGL::LEFT, LLFontGL::TOP);
 
@@ -552,7 +570,7 @@ void LLGLTexMemBar::draw()
 					LLAppViewer::getTextureCache()->getNumReads(), LLAppViewer::getTextureCache()->getNumWrites(),
 					LLLFSThread::sLocal->getPending(),
 					LLImageRaw::sRawImageCount,
-					LLAppViewer::getTextureFetch()->getCurlRequest().getNumRequests(),
+					LLAppViewer::getTextureFetch()->getNumHTTPRequests(),
 					LLAppViewer::getImageDecodeThread()->getPending(), 
 					gTextureList.mCreateTextureList.size());
 
diff --git a/indra/newview/llviewerassetstats.cpp b/indra/newview/llviewerassetstats.cpp
index 4c59fd0371..4c59fd0371 100755..100644
--- a/indra/newview/llviewerassetstats.cpp
+++ b/indra/newview/llviewerassetstats.cpp
diff --git a/indra/newview/llviewerassetstats.h b/indra/newview/llviewerassetstats.h
index 8319752230..8319752230 100755..100644
--- a/indra/newview/llviewerassetstats.h
+++ b/indra/newview/llviewerassetstats.h
diff --git a/indra/newview/llviewerinventory.cpp b/indra/newview/llviewerinventory.cpp
index b47a41c44c..b47a41c44c 100755..100644
--- a/indra/newview/llviewerinventory.cpp
+++ b/indra/newview/llviewerinventory.cpp
diff --git a/indra/newview/llviewerjointmesh.cpp b/indra/newview/llviewerjointmesh.cpp
index 5d1aa870a3..5d1aa870a3 100755..100644
--- a/indra/newview/llviewerjointmesh.cpp
+++ b/indra/newview/llviewerjointmesh.cpp
diff --git a/indra/newview/llviewerjointmesh.h b/indra/newview/llviewerjointmesh.h
index dd5dae1dc1..dd5dae1dc1 100755..100644
--- a/indra/newview/llviewerjointmesh.h
+++ b/indra/newview/llviewerjointmesh.h
diff --git a/indra/newview/llviewerstats.h b/indra/newview/llviewerstats.h
index 554e4d647e..554e4d647e 100755..100644
--- a/indra/newview/llviewerstats.h
+++ b/indra/newview/llviewerstats.h
diff --git a/indra/newview/llvoavatar.h b/indra/newview/llvoavatar.h
index 1adb680962..1adb680962 100755..100644
--- a/indra/newview/llvoavatar.h
+++ b/indra/newview/llvoavatar.h
diff --git a/indra/newview/llvoavatarself.h b/indra/newview/llvoavatarself.h
index 7bd0c0bf93..7bd0c0bf93 100755..100644
--- a/indra/newview/llvoavatarself.h
+++ b/indra/newview/llvoavatarself.h
diff --git a/indra/newview/tests/llviewerassetstats_test.cpp b/indra/newview/tests/llviewerassetstats_test.cpp
index f8923b9868..f8923b9868 100755..100644
--- a/indra/newview/tests/llviewerassetstats_test.cpp
+++ b/indra/newview/tests/llviewerassetstats_test.cpp
diff --git a/indra/newview/viewer_manifest.py b/indra/newview/viewer_manifest.py
index b962b6b044..8338a27140 100644
--- a/indra/newview/viewer_manifest.py
+++ b/indra/newview/viewer_manifest.py
@@ -1053,9 +1053,21 @@ class Linux_i686Manifest(LinuxManifest):
         super(Linux_i686Manifest, self).construct()
 
         if self.prefix("../packages/lib/release", dst="lib"):
-            self.path("libapr-1.so*")
-            self.path("libaprutil-1.so*")
-            self.path("libbreakpad_client.so*")
+            self.path("libapr-1.so")
+            self.path("libapr-1.so.0")
+            self.path("libapr-1.so.0.4.5")
+            self.path("libaprutil-1.so")
+            self.path("libaprutil-1.so.0")
+            self.path("libaprutil-1.so.0.4.1")
+            self.path("libboost_program_options-mt.so.1.48.0")
+            self.path("libboost_regex-mt.so.1.48.0")
+            self.path("libboost_thread-mt.so.1.48.0")
+            self.path("libboost_filesystem-mt.so.1.48.0")
+            self.path("libboost_signals-mt.so.1.48.0")
+            self.path("libboost_system-mt.so.1.48.0")
+            self.path("libbreakpad_client.so.0.0.0")
+            self.path("libbreakpad_client.so.0")
+            self.path("libbreakpad_client.so")
             self.path("libcollada14dom.so")
             self.path("libdb*.so")
             self.path("libcrypto.so.*")