Merge 3.3.3 release with Drano HTTP library at 3.3.0

Big delta was converting the new texture debugger support code
to the new library.  Viewer manifest should probably get an eyeball
before release.

1 files changed, 326 insertions, 0 deletions

diff --git a/indra/llcorehttp/_httplibcurl.cpp b/indra/llcorehttp/_httplibcurl.cpp
new file mode 100644
index 0000000000..39abca12c5
--- /dev/null
+++ b/indra/llcorehttp/_httplibcurl.cpp
@@ -0,0 +1,326 @@
+/**
+ * @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 <= 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();
+	}
+}
+
+
+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 = (std::min)(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 = (std::min)(ret, HttpService::NORMAL);
+	}
+	return ret;
+}
+
+
+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
+		// *FIXME:  Need failure path
+		return;
+	}
+
+	// Make the request live
+	curl_multi_add_handle(mMultiHandles[op->mReqPolicy], op->mCurlHandle);
+	op->mCurlActive = true;
+	
+	if (op->mTracing > 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);
+}
+
+
+// *NOTE:  cancelRequest logic parallels completeRequest logic.
+// Keep them synchronized as necessary.  Caller is expected to
+// remove to 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 > 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);
+		op->mStatus = LLCore::HttpStatus(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 > 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