Automated merge up from viewer-development

13 files changed, 1845 insertions, 0 deletions

diff --git a/indra/viewer_components/updater/CMakeLists.txt b/indra/viewer_components/updater/CMakeLists.txt
new file mode 100644
index 0000000000..0e288bb496
--- /dev/null
+++ b/indra/viewer_components/updater/CMakeLists.txt
@@ -0,0 +1,82 @@
+# -*- cmake -*-
+
+project(updater_service)
+
+include(00-Common)
+if(LL_TESTS)
+  include(LLAddBuildTest)
+endif(LL_TESTS)
+include(CMakeCopyIfDifferent)
+include(CURL)
+include(LLCommon)
+include(LLMessage)
+include(LLPlugin)
+include(LLVFS)
+
+include_directories(
+    ${LLCOMMON_INCLUDE_DIRS}
+    ${LLMESSAGE_INCLUDE_DIRS}
+    ${LLPLUGIN_INCLUDE_DIRS}
+	${LLVFS_INCLUDE_DIRS}
+	${CURL_INCLUDE_DIRS}
+    )
+
+set(updater_service_SOURCE_FILES
+    llupdaterservice.cpp
+    llupdatechecker.cpp
+    llupdatedownloader.cpp
+    llupdateinstaller.cpp
+    )
+
+set(updater_service_HEADER_FILES
+    llupdaterservice.h
+    llupdatechecker.h
+    llupdatedownloader.h
+    llupdateinstaller.h
+    )
+
+set_source_files_properties(${updater_service_HEADER_FILES}
+                            PROPERTIES HEADER_FILE_ONLY TRUE)
+
+list(APPEND 
+    updater_service_SOURCE_FILES 
+    ${updater_service_HEADER_FILES} 
+    )
+
+add_library(llupdaterservice
+            ${updater_service_SOURCE_FILES}
+            )
+
+target_link_libraries(llupdaterservice
+    ${LLCOMMON_LIBRARIES}
+    ${LLMESSAGE_LIBRARIES}
+    ${LLPLUGIN_LIBRARIES}
+	${LLVFS_LIBRARIES}
+    )
+
+if(LL_TESTS)
+  SET(llupdater_service_TEST_SOURCE_FILES
+      llupdaterservice.cpp
+      )
+
+# *NOTE:Mani - I was trying to use the preprocessor seam to mock out
+#              llifstream (and other) llcommon classes. I didn't work
+#              because of the windows declspec(dllimport)attribute.
+#set_source_files_properties(
+#    llupdaterservice.cpp
+#    PROPERTIES
+#      LL_TEST_ADDITIONAL_CFLAGS "-Dllifstream=llus_mock_llifstream"
+#    )
+
+  LL_ADD_PROJECT_UNIT_TESTS(llupdaterservice "${llupdater_service_TEST_SOURCE_FILES}")
+endif(LL_TESTS)
+
+set(UPDATER_INCLUDE_DIRS 
+  ${LIBS_OPEN_DIR}/viewer_components/updater 
+  CACHE INTERNAL ""
+)
+
+set(UPDATER_LIBRARIES 
+  llupdaterservice
+  CACHE INTERNAL ""
+)
diff --git a/indra/viewer_components/updater/llupdatechecker.cpp b/indra/viewer_components/updater/llupdatechecker.cpp
new file mode 100644
index 0000000000..c6aa9b0f11
--- /dev/null
+++ b/indra/viewer_components/updater/llupdatechecker.cpp
@@ -0,0 +1,194 @@
+/** 
+ * @file llupdaterservice.cpp
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+#include <stdexcept>
+#include <boost/format.hpp>
+#include "llhttpclient.h"
+#include "llsd.h"
+#include "llupdatechecker.h"
+#include "lluri.h"
+
+
+#if LL_WINDOWS
+#pragma warning (disable : 4355) // 'this' used in initializer list: yes, intentionally
+#endif
+
+
+class LLUpdateChecker::CheckError:
+	public std::runtime_error
+{
+public:
+	CheckError(const char * message):
+		std::runtime_error(message)
+	{
+		; // No op.
+	}
+};
+
+
+class LLUpdateChecker::Implementation:
+	public LLHTTPClient::Responder
+{
+public:
+	Implementation(Client & client);
+	~Implementation();
+	void check(std::string const & protocolVersion, std::string const & hostUrl, 
+			   std::string const & servicePath, std::string channel, std::string version);
+	
+	// Responder:
+	virtual void completed(U32 status,
+						   const std::string & reason,
+						   const LLSD& content);
+	virtual void error(U32 status, const std::string & reason);
+	
+private:	
+	static const char * sProtocolVersion;
+	
+	Client & mClient;
+	LLHTTPClient mHttpClient;
+	bool mInProgress;
+	std::string mVersion;
+	
+	std::string buildUrl(std::string const & protocolVersion, std::string const & hostUrl, 
+						 std::string const & servicePath, std::string channel, std::string version);
+
+	LOG_CLASS(LLUpdateChecker::Implementation);
+};
+
+
+
+// LLUpdateChecker
+//-----------------------------------------------------------------------------
+
+
+LLUpdateChecker::LLUpdateChecker(LLUpdateChecker::Client & client):
+	mImplementation(new LLUpdateChecker::Implementation(client))
+{
+	; // No op.
+}
+
+
+void LLUpdateChecker::check(std::string const & protocolVersion, std::string const & hostUrl, 
+							std::string const & servicePath, std::string channel, std::string version)
+{
+	mImplementation->check(protocolVersion, hostUrl, servicePath, channel, version);
+}
+
+
+
+// LLUpdateChecker::Implementation
+//-----------------------------------------------------------------------------
+
+
+const char * LLUpdateChecker::Implementation::sProtocolVersion = "v1.0";
+
+
+LLUpdateChecker::Implementation::Implementation(LLUpdateChecker::Client & client):
+	mClient(client),
+	mInProgress(false)
+{
+	; // No op.
+}
+
+
+LLUpdateChecker::Implementation::~Implementation()
+{
+	; // No op.
+}
+
+
+void LLUpdateChecker::Implementation::check(std::string const & protocolVersion, std::string const & hostUrl, 
+											std::string const & servicePath, std::string channel, std::string version)
+{
+	llassert(!mInProgress);
+	
+	if(protocolVersion != sProtocolVersion) throw CheckError("unsupported protocol");
+		
+	mInProgress = true;
+	mVersion = version;
+	std::string checkUrl = buildUrl(protocolVersion, hostUrl, servicePath, channel, version);
+	LL_INFOS("UpdateCheck") << "checking for updates at " << checkUrl << llendl;
+	
+	// The HTTP client will wrap a raw pointer in a boost::intrusive_ptr causing the
+	// passed object to be silently and automatically deleted.  We pass a self-
+	// referential intrusive pointer to which we add a reference to keep the
+	// client from deleting the update checker implementation instance.
+	LLHTTPClient::ResponderPtr temporaryPtr(this);
+	boost::intrusive_ptr_add_ref(temporaryPtr.get());
+	mHttpClient.get(checkUrl, temporaryPtr);
+}
+
+void LLUpdateChecker::Implementation::completed(U32 status,
+							  const std::string & reason,
+							  const LLSD & content)
+{
+	mInProgress = false;	
+	
+	if(status != 200) {
+		LL_WARNS("UpdateCheck") << "html error " << status << " (" << reason << ")" << llendl;
+		mClient.error(reason);
+	} else if(!content.asBoolean()) {
+		LL_INFOS("UpdateCheck") << "up to date" << llendl;
+		mClient.upToDate();
+	} else if(content["required"].asBoolean()) {
+		LL_INFOS("UpdateCheck") << "version invalid" << llendl;
+		LLURI uri(content["url"].asString());
+		mClient.requiredUpdate(content["version"].asString(), uri, content["hash"].asString());
+	} else {
+		LL_INFOS("UpdateCheck") << "newer version " << content["version"].asString() << " available" << llendl;
+		LLURI uri(content["url"].asString());
+		mClient.optionalUpdate(content["version"].asString(), uri, content["hash"].asString());
+	}
+}
+
+
+void LLUpdateChecker::Implementation::error(U32 status, const std::string & reason)
+{
+	mInProgress = false;
+	LL_WARNS("UpdateCheck") << "update check failed; " << reason << llendl;
+	mClient.error(reason);
+}
+
+
+std::string LLUpdateChecker::Implementation::buildUrl(std::string const & protocolVersion, std::string const & hostUrl, 
+													  std::string const & servicePath, std::string channel, std::string version)
+{	
+#ifdef LL_WINDOWS
+	static const char * platform = "win";
+#elif LL_DARWIN
+	static const char * platform = "mac";
+#else
+	static const char * platform = "lnx";
+#endif
+	
+	LLSD path;
+	path.append(servicePath);
+	path.append(protocolVersion);
+	path.append(channel);
+	path.append(version);
+	path.append(platform);
+	return LLURI::buildHTTP(hostUrl, path).asString();
+}
diff --git a/indra/viewer_components/updater/llupdatechecker.h b/indra/viewer_components/updater/llupdatechecker.h
new file mode 100644
index 0000000000..cea1f13647
--- /dev/null
+++ b/indra/viewer_components/updater/llupdatechecker.h
@@ -0,0 +1,82 @@
+/** 
+ * @file llupdatechecker.h
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_UPDATERCHECKER_H
+#define LL_UPDATERCHECKER_H
+
+
+#include <boost/shared_ptr.hpp>
+
+
+//
+// Implements asynchronous checking for updates.
+//
+class LLUpdateChecker {
+public:
+	class Client;
+	class Implementation;
+	
+	// An exception that may be raised on check errors.
+	class CheckError;
+	
+	LLUpdateChecker(Client & client);
+	
+	// Check status of current app on the given host for the channel and version provided.
+	void check(std::string const & protocolVersion, std::string const & hostUrl, 
+			   std::string const & servicePath, std::string channel, std::string version);
+	
+private:
+	boost::shared_ptr<Implementation> mImplementation;
+};
+
+
+class LLURI; // From lluri.h
+
+
+//
+// The client interface implemented by a requestor checking for an update.
+//
+class LLUpdateChecker::Client
+{
+public:
+	// An error occurred while checking for an update.
+	virtual void error(std::string const & message) = 0;
+	
+	// A newer version is available, but the current version may still be used.
+	virtual void optionalUpdate(std::string const & newVersion,
+								LLURI const & uri,
+								std::string const & hash) = 0;
+	
+	// A newer version is available, and the current version is no longer valid. 
+	virtual void requiredUpdate(std::string const & newVersion,
+								LLURI const & uri,
+								std::string const & hash) = 0;
+	
+	// The checked version is up to date; no newer version exists.
+	virtual void upToDate(void) = 0;
+};
+
+
+#endif
diff --git a/indra/viewer_components/updater/llupdatedownloader.cpp b/indra/viewer_components/updater/llupdatedownloader.cpp
new file mode 100644
index 0000000000..c17a50e242
--- /dev/null
+++ b/indra/viewer_components/updater/llupdatedownloader.cpp
@@ -0,0 +1,428 @@
+/** 
+ * @file llupdatedownloader.cpp
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+#include <stdexcept>
+#include <boost/format.hpp>
+#include <boost/lexical_cast.hpp>
+#include <curl/curl.h>
+#include "lldir.h"
+#include "llfile.h"
+#include "llmd5.h"
+#include "llsd.h"
+#include "llsdserialize.h"
+#include "llthread.h"
+#include "llupdatedownloader.h"
+#include "llupdaterservice.h"
+
+
+class LLUpdateDownloader::Implementation:
+	public LLThread
+{
+public:
+	Implementation(LLUpdateDownloader::Client & client);
+	~Implementation();
+	void cancel(void);
+	void download(LLURI const & uri, std::string const & hash);
+	bool isDownloading(void);
+	size_t onHeader(void * header, size_t size);
+	size_t onBody(void * header, size_t size);
+	void resume(void);
+	
+private:
+	bool mCancelled;
+	LLUpdateDownloader::Client & mClient;
+	CURL * mCurl;
+	LLSD mDownloadData;
+	llofstream mDownloadStream;
+	std::string mDownloadRecordPath;
+	curl_slist * mHeaderList;
+	
+	void initializeCurlGet(std::string const & url, bool processHeader);
+	void resumeDownloading(size_t startByte);
+	void run(void);
+	void startDownloading(LLURI const & uri, std::string const & hash);
+	void throwOnCurlError(CURLcode code);
+	bool validateDownload(void);
+
+	LOG_CLASS(LLUpdateDownloader::Implementation);
+};
+
+
+namespace {
+	class DownloadError:
+		public std::runtime_error
+	{
+	public:
+		DownloadError(const char * message):
+			std::runtime_error(message)
+		{
+			; // No op.
+		}
+	};
+
+		
+	const char * gSecondLifeUpdateRecord = "SecondLifeUpdateDownload.xml";
+};
+
+
+
+// LLUpdateDownloader
+//-----------------------------------------------------------------------------
+
+
+
+std::string LLUpdateDownloader::downloadMarkerPath(void)
+{
+	return gDirUtilp->getExpandedFilename(LL_PATH_LOGS, gSecondLifeUpdateRecord);
+}
+
+
+LLUpdateDownloader::LLUpdateDownloader(Client & client):
+	mImplementation(new LLUpdateDownloader::Implementation(client))
+{
+	; // No op.
+}
+
+
+void LLUpdateDownloader::cancel(void)
+{
+	mImplementation->cancel();
+}
+
+
+void LLUpdateDownloader::download(LLURI const & uri, std::string const & hash)
+{
+	mImplementation->download(uri, hash);
+}
+
+
+bool LLUpdateDownloader::isDownloading(void)
+{
+	return mImplementation->isDownloading();
+}
+
+
+void LLUpdateDownloader::resume(void)
+{
+	mImplementation->resume();
+}
+
+
+
+// LLUpdateDownloader::Implementation
+//-----------------------------------------------------------------------------
+
+
+namespace {
+	size_t write_function(void * data, size_t blockSize, size_t blocks, void * downloader)
+	{
+		size_t bytes = blockSize * blocks;
+		return reinterpret_cast<LLUpdateDownloader::Implementation *>(downloader)->onBody(data, bytes);
+	}
+
+
+	size_t header_function(void * data, size_t blockSize, size_t blocks, void * downloader)
+	{
+		size_t bytes = blockSize * blocks;
+		return reinterpret_cast<LLUpdateDownloader::Implementation *>(downloader)->onHeader(data, bytes);
+	}
+}
+
+
+LLUpdateDownloader::Implementation::Implementation(LLUpdateDownloader::Client & client):
+	LLThread("LLUpdateDownloader"),
+	mCancelled(false),
+	mClient(client),
+	mCurl(0),
+	mHeaderList(0)
+{
+	CURLcode code = curl_global_init(CURL_GLOBAL_ALL); // Just in case.
+	llverify(code == CURLE_OK); // TODO: real error handling here. 
+}
+
+
+LLUpdateDownloader::Implementation::~Implementation()
+{
+	if(isDownloading()) {
+		cancel();
+		shutdown();
+	} else {
+		; // No op.
+	}
+	if(mCurl) curl_easy_cleanup(mCurl);
+}
+
+
+void LLUpdateDownloader::Implementation::cancel(void)
+{
+	mCancelled = true;
+}
+	
+
+void LLUpdateDownloader::Implementation::download(LLURI const & uri, std::string const & hash)
+{
+	if(isDownloading()) mClient.downloadError("download in progress");
+
+	mDownloadRecordPath = downloadMarkerPath();
+	mDownloadData = LLSD();
+	try {
+		startDownloading(uri, hash);
+	} catch(DownloadError const & e) {
+		mClient.downloadError(e.what());
+	}
+}
+
+
+bool LLUpdateDownloader::Implementation::isDownloading(void)
+{
+	return !isStopped();
+}
+
+
+void LLUpdateDownloader::Implementation::resume(void)
+{
+	mCancelled = false;
+
+	if(isDownloading()) {
+		mClient.downloadError("download in progress");
+	}
+
+	mDownloadRecordPath = downloadMarkerPath();
+	llifstream dataStream(mDownloadRecordPath);
+	if(!dataStream) {
+		mClient.downloadError("no download marker");
+		return;
+	}
+	
+	LLSDSerialize::fromXMLDocument(mDownloadData, dataStream);
+	
+	if(!mDownloadData.asBoolean()) {
+		mClient.downloadError("no download information in marker");
+		return;
+	}
+	
+	std::string filePath = mDownloadData["path"].asString();
+	try {
+		if(LLFile::isfile(filePath)) {		
+			llstat fileStatus;
+			LLFile::stat(filePath, &fileStatus);
+			if(fileStatus.st_size != mDownloadData["size"].asInteger()) {
+				resumeDownloading(fileStatus.st_size);
+			} else if(!validateDownload()) {
+				LLFile::remove(filePath);
+				download(LLURI(mDownloadData["url"].asString()), mDownloadData["hash"].asString());
+			} else {
+				mClient.downloadComplete(mDownloadData);
+			}
+		} else {
+			download(LLURI(mDownloadData["url"].asString()), mDownloadData["hash"].asString());
+		}
+	} catch(DownloadError & e) {
+		mClient.downloadError(e.what());
+	}
+}
+
+
+size_t LLUpdateDownloader::Implementation::onHeader(void * buffer, size_t size)
+{
+	char const * headerPtr = reinterpret_cast<const char *> (buffer);
+	std::string header(headerPtr, headerPtr + size);
+	size_t colonPosition = header.find(':');
+	if(colonPosition == std::string::npos) return size; // HTML response; ignore.
+	
+	if(header.substr(0, colonPosition) == "Content-Length") {
+		try {
+			size_t firstDigitPos = header.find_first_of("0123456789", colonPosition);
+			size_t lastDigitPos = header.find_last_of("0123456789");
+			std::string contentLength = header.substr(firstDigitPos, lastDigitPos - firstDigitPos + 1);
+			size_t size = boost::lexical_cast<size_t>(contentLength);
+			LL_INFOS("UpdateDownload") << "download size is " << size << LL_ENDL;
+			
+			mDownloadData["size"] = LLSD(LLSD::Integer(size));
+			llofstream odataStream(mDownloadRecordPath);
+			LLSDSerialize::toPrettyXML(mDownloadData, odataStream);
+		} catch (std::exception const & e) {
+			LL_WARNS("UpdateDownload") << "unable to read content length (" 
+				<< e.what() << ")" << LL_ENDL;
+		}
+	} else {
+		; // No op.
+	}
+	
+	return size;
+}
+
+
+size_t LLUpdateDownloader::Implementation::onBody(void * buffer, size_t size)
+{
+	if(mCancelled) return 0; // Forces a write error which will halt curl thread.
+	if((size == 0) || (buffer == 0)) return 0; 
+	
+	mDownloadStream.write(reinterpret_cast<const char *>(buffer), size);
+	if(mDownloadStream.bad()) {
+		return 0;
+	} else {
+		return size;
+	}
+}
+
+
+void LLUpdateDownloader::Implementation::run(void)
+{
+	CURLcode code = curl_easy_perform(mCurl);
+	mDownloadStream.close();
+	if(code == CURLE_OK) {
+		LLFile::remove(mDownloadRecordPath);
+		if(validateDownload()) {
+			LL_INFOS("UpdateDownload") << "download successful" << LL_ENDL;
+			mClient.downloadComplete(mDownloadData);
+		} else {
+			LL_INFOS("UpdateDownload") << "download failed hash check" << LL_ENDL;
+			std::string filePath = mDownloadData["path"].asString();
+			if(filePath.size() != 0) LLFile::remove(filePath);
+			mClient.downloadError("failed hash check");
+		}
+	} else if(mCancelled && (code == CURLE_WRITE_ERROR)) {
+		LL_INFOS("UpdateDownload") << "download canceled by user" << LL_ENDL;
+		// Do not call back client.
+	} else {
+		LL_WARNS("UpdateDownload") << "download failed with error '" << 
+			curl_easy_strerror(code) << "'" << LL_ENDL;
+		LLFile::remove(mDownloadRecordPath);
+		if(mDownloadData.has("path")) LLFile::remove(mDownloadData["path"].asString());
+		mClient.downloadError("curl error");
+	}
+	
+	if(mHeaderList) {
+		curl_slist_free_all(mHeaderList);
+		mHeaderList = 0;
+	}
+}
+
+
+void LLUpdateDownloader::Implementation::initializeCurlGet(std::string const & url, bool processHeader)
+{
+	if(mCurl == 0) {
+		mCurl = curl_easy_init();
+	} else {
+		curl_easy_reset(mCurl);
+	}
+	
+	if(mCurl == 0) throw DownloadError("failed to initialize curl");
+	
+	throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_NOSIGNAL, true));
+	throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_FOLLOWLOCATION, true));
+	throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_WRITEFUNCTION, &write_function));
+	throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_WRITEDATA, this));
+	if(processHeader) {
+	   throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_HEADERFUNCTION, &header_function));
+	   throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_HEADERDATA, this));
+	}
+	throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_HTTPGET, true));
+	throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_URL, url.c_str()));
+}
+
+
+void LLUpdateDownloader::Implementation::resumeDownloading(size_t startByte)
+{
+	LL_INFOS("UpdateDownload") << "resuming download from " << mDownloadData["url"].asString()
+		<< " at byte " << startByte << LL_ENDL;
+
+	initializeCurlGet(mDownloadData["url"].asString(), false);
+	
+	// The header 'Range: bytes n-' will request the bytes remaining in the
+	// source begining with byte n and ending with the last byte.
+	boost::format rangeHeaderFormat("Range: bytes=%u-");
+	rangeHeaderFormat % startByte;
+	mHeaderList = curl_slist_append(mHeaderList, rangeHeaderFormat.str().c_str());
+	if(mHeaderList == 0) throw DownloadError("cannot add Range header");
+	throwOnCurlError(curl_easy_setopt(mCurl, CURLOPT_HTTPHEADER, mHeaderList));
+	
+	mDownloadStream.open(mDownloadData["path"].asString(),
+						 std::ios_base::out | std::ios_base::binary | std::ios_base::app);
+	start();
+}
+
+
+void LLUpdateDownloader::Implementation::startDownloading(LLURI const & uri, std::string const & hash)
+{
+	mDownloadData["url"] = uri.asString();
+	mDownloadData["hash"] = hash;
+	mDownloadData["current_version"] = ll_get_version();
+	LLSD path = uri.pathArray();
+	if(path.size() == 0) throw DownloadError("no file path");
+	std::string fileName = path[path.size() - 1].asString();
+	std::string filePath = gDirUtilp->getExpandedFilename(LL_PATH_TEMP, fileName);
+	mDownloadData["path"] = filePath;
+
+	LL_INFOS("UpdateDownload") << "downloading " << filePath
+		<< " from " << uri.asString() << LL_ENDL;
+	LL_INFOS("UpdateDownload") << "hash of file is " << hash << LL_ENDL;
+		
+	llofstream dataStream(mDownloadRecordPath);
+	LLSDSerialize::toPrettyXML(mDownloadData, dataStream);
+	
+	mDownloadStream.open(filePath, std::ios_base::out | std::ios_base::binary);
+	initializeCurlGet(uri.asString(), true);
+	start();
+}
+
+
+void LLUpdateDownloader::Implementation::throwOnCurlError(CURLcode code)
+{
+	if(code != CURLE_OK) {
+		const char * errorString = curl_easy_strerror(code);
+		if(errorString != 0) {
+			throw DownloadError(curl_easy_strerror(code));
+		} else {
+			throw DownloadError("unknown curl error");
+		}
+	} else {
+		; // No op.
+	}
+}
+
+
+bool LLUpdateDownloader::Implementation::validateDownload(void)
+{
+	std::string filePath = mDownloadData["path"].asString();
+	llifstream fileStream(filePath, std::ios_base::in | std::ios_base::binary);
+	if(!fileStream) return false;
+
+	std::string hash = mDownloadData["hash"].asString();
+	if(hash.size() != 0) {
+		LL_INFOS("UpdateDownload") << "checking hash..." << LL_ENDL;
+		char digest[33];
+		LLMD5(fileStream).hex_digest(digest);
+		if(hash != digest) {
+			LL_WARNS("UpdateDownload") << "download hash mismatch; expeted " << hash <<
+				" but download is " << digest << LL_ENDL;
+		}
+		return hash == digest;
+	} else {
+		return true; // No hash check provided.
+	}
+}
diff --git a/indra/viewer_components/updater/llupdatedownloader.h b/indra/viewer_components/updater/llupdatedownloader.h
new file mode 100644
index 0000000000..1b3d7480fd
--- /dev/null
+++ b/indra/viewer_components/updater/llupdatedownloader.h
@@ -0,0 +1,87 @@
+/** 
+ * @file llupdatedownloader.h
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_UPDATE_DOWNLOADER_H
+#define LL_UPDATE_DOWNLOADER_H
+
+
+#include <string>
+#include <boost/shared_ptr.hpp>
+#include "lluri.h"
+
+
+//
+// An asynchronous download service for fetching updates.
+//
+class LLUpdateDownloader
+{
+public:
+	class Client;
+	class Implementation;
+	
+	// Returns the path to the download marker file containing details of the
+	// latest download.
+	static std::string downloadMarkerPath(void);
+	
+	LLUpdateDownloader(Client & client);
+	
+	// Cancel any in progress download; a no op if none is in progress.  The
+	// client will not receive a complete or error callback.
+	void cancel(void);
+	
+	// Start a new download.
+	void download(LLURI const & uri, std::string const & hash);
+	
+	// Returns true if a download is in progress.
+	bool isDownloading(void);
+	
+	// Resume a partial download.
+	void resume(void);
+	
+private:
+	boost::shared_ptr<Implementation> mImplementation;
+};
+
+
+//
+// An interface to be implemented by clients initiating a update download.
+//
+class LLUpdateDownloader::Client {
+public:
+	
+	// The download has completed successfully.
+	// data is a map containing the following items:
+	// url - source (remote) location
+	// hash - the md5 sum that should match the installer file.
+	// path - destination (local) location
+	// size - the size of the installer in bytes
+	virtual void downloadComplete(LLSD const & data) = 0;
+	
+	// The download failed.
+	virtual void downloadError(std::string const & message) = 0;
+};
+
+
+#endif
diff --git a/indra/viewer_components/updater/llupdateinstaller.cpp b/indra/viewer_components/updater/llupdateinstaller.cpp
new file mode 100644
index 0000000000..650ef88af4
--- /dev/null
+++ b/indra/viewer_components/updater/llupdateinstaller.cpp
@@ -0,0 +1,90 @@
+/** 
+ * @file llupdateinstaller.cpp
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+#include <apr_file_io.h>
+#include "llapr.h"
+#include "llprocesslauncher.h"
+#include "llupdateinstaller.h"
+#include "lldir.h" 
+
+
+namespace {
+	class RelocateError {};
+	
+	
+	std::string copy_to_temp(std::string const & path)
+	{
+		std::string scriptFile = gDirUtilp->getBaseFileName(path);
+		std::string newPath = gDirUtilp->getExpandedFilename(LL_PATH_TEMP, scriptFile);
+		apr_status_t status = apr_file_copy(path.c_str(), newPath.c_str(), APR_FILE_SOURCE_PERMS, gAPRPoolp);
+		if(status != APR_SUCCESS) throw RelocateError();
+		
+		return newPath;
+	}
+}
+
+
+int ll_install_update(std::string const & script, std::string const & updatePath, LLInstallScriptMode mode)
+{
+	std::string actualScriptPath;
+	switch(mode) {
+		case LL_COPY_INSTALL_SCRIPT_TO_TEMP:
+			try {
+				actualScriptPath = copy_to_temp(script);
+			}
+			catch (RelocateError &) {
+				return -1;
+			}
+			break;
+		case LL_RUN_INSTALL_SCRIPT_IN_PLACE:
+			actualScriptPath = script;
+			break;
+		default:
+			llassert(!"unpossible copy mode");
+	}
+	
+	llinfos << "UpdateInstaller: installing " << updatePath << " using " <<
+		actualScriptPath << LL_ENDL;
+	
+	LLProcessLauncher launcher;
+	launcher.setExecutable(actualScriptPath);
+	launcher.addArgument(updatePath);
+	launcher.addArgument(ll_install_failed_marker_path().c_str());
+	int result = launcher.launch();
+	launcher.orphan();
+	
+	return result;
+}
+
+
+std::string const & ll_install_failed_marker_path(void)
+{
+	static std::string path;
+	if(path.empty()) {
+		path = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "SecondLifeInstallFailed.marker");
+	}
+	return path;
+}
diff --git a/indra/viewer_components/updater/llupdateinstaller.h b/indra/viewer_components/updater/llupdateinstaller.h
new file mode 100644
index 0000000000..6ce08ce6fa
--- /dev/null
+++ b/indra/viewer_components/updater/llupdateinstaller.h
@@ -0,0 +1,57 @@
+/** 
+ * @file llupdateinstaller.h
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_UPDATE_INSTALLER_H
+#define LL_UPDATE_INSTALLER_H
+
+
+#include <string>
+
+
+enum LLInstallScriptMode {
+	LL_RUN_INSTALL_SCRIPT_IN_PLACE,
+	LL_COPY_INSTALL_SCRIPT_TO_TEMP
+};
+
+//
+// Launch the installation script.
+// 
+// The updater will overwrite the current installation, so it is highly recommended
+// that the current application terminate once this function is called.
+//
+int ll_install_update(
+					   std::string const & script, // Script to execute.
+					   std::string const & updatePath, // Path to update file.
+					   LLInstallScriptMode mode=LL_COPY_INSTALL_SCRIPT_TO_TEMP); // Run in place or copy to temp?
+
+
+//
+// Returns the path which points to the failed install marker file, should it
+// exist.
+//
+std::string const & ll_install_failed_marker_path(void);
+
+
+#endif
diff --git a/indra/viewer_components/updater/llupdaterservice.cpp b/indra/viewer_components/updater/llupdaterservice.cpp
new file mode 100644
index 0000000000..cc60eaead2
--- /dev/null
+++ b/indra/viewer_components/updater/llupdaterservice.cpp
@@ -0,0 +1,519 @@
+/** 
+ * @file llupdaterservice.cpp
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llupdatedownloader.h"
+#include "llevents.h"
+#include "lltimer.h"
+#include "llupdaterservice.h"
+#include "llupdatechecker.h"
+#include "llupdateinstaller.h"
+#include "llversionviewer.h"
+
+#include <boost/scoped_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include "lldir.h"
+#include "llsdserialize.h"
+#include "llfile.h"
+
+#if LL_WINDOWS
+#pragma warning (disable : 4355) // 'this' used in initializer list: yes, intentionally
+#endif
+
+
+namespace 
+{
+	boost::weak_ptr<LLUpdaterServiceImpl> gUpdater;
+
+	const std::string UPDATE_MARKER_FILENAME("SecondLifeUpdateReady.xml");
+	std::string update_marker_path()
+	{
+		return gDirUtilp->getExpandedFilename(LL_PATH_LOGS, 
+											  UPDATE_MARKER_FILENAME);
+	}
+	
+	std::string install_script_path(void)
+	{
+#ifdef LL_WINDOWS
+		std::string scriptFile = "update_install.bat";
+#else
+		std::string scriptFile = "update_install";
+#endif
+		return gDirUtilp->getExpandedFilename(LL_PATH_EXECUTABLE, scriptFile);
+	}
+	
+	LLInstallScriptMode install_script_mode(void) 
+	{
+#ifdef LL_WINDOWS
+		return LL_COPY_INSTALL_SCRIPT_TO_TEMP;
+#else
+		return LL_RUN_INSTALL_SCRIPT_IN_PLACE;
+#endif
+	};
+	
+}
+
+class LLUpdaterServiceImpl : 
+	public LLUpdateChecker::Client,
+	public LLUpdateDownloader::Client
+{
+	static const std::string sListenerName;
+	
+	std::string mProtocolVersion;
+	std::string mUrl;
+	std::string mPath;
+	std::string mChannel;
+	std::string mVersion;
+	
+	unsigned int mCheckPeriod;
+	bool mIsChecking;
+	bool mIsDownloading;
+	
+	LLUpdateChecker mUpdateChecker;
+	LLUpdateDownloader mUpdateDownloader;
+	LLTimer mTimer;
+
+	LLUpdaterService::app_exit_callback_t mAppExitCallback;
+	
+	LOG_CLASS(LLUpdaterServiceImpl);
+	
+public:
+	LLUpdaterServiceImpl();
+	virtual ~LLUpdaterServiceImpl();
+
+	void initialize(const std::string& protocol_version,
+				   const std::string& url, 
+				   const std::string& path,
+				   const std::string& channel,
+				   const std::string& version);
+	
+	void setCheckPeriod(unsigned int seconds);
+
+	void startChecking(bool install_if_ready);
+	void stopChecking();
+	bool isChecking();
+	
+	void setAppExitCallback(LLUpdaterService::app_exit_callback_t aecb) { mAppExitCallback = aecb;}
+
+	bool checkForInstall(bool launchInstaller); // Test if a local install is ready.
+	bool checkForResume(); // Test for resumeable d/l.
+
+	// LLUpdateChecker::Client:
+	virtual void error(std::string const & message);
+	virtual void optionalUpdate(std::string const & newVersion,
+								LLURI const & uri,
+								std::string const & hash);
+	virtual void requiredUpdate(std::string const & newVersion,
+								LLURI const & uri,
+								std::string const & hash);
+	virtual void upToDate(void);
+	
+	// LLUpdateDownloader::Client
+	void downloadComplete(LLSD const & data);
+	void downloadError(std::string const & message);
+
+	bool onMainLoop(LLSD const & event);
+
+private:
+	void restartTimer(unsigned int seconds);
+	void stopTimer();
+};
+
+const std::string LLUpdaterServiceImpl::sListenerName = "LLUpdaterServiceImpl";
+
+LLUpdaterServiceImpl::LLUpdaterServiceImpl() :
+	mIsChecking(false),
+	mIsDownloading(false),
+	mCheckPeriod(0),
+	mUpdateChecker(*this),
+	mUpdateDownloader(*this)
+{
+}
+
+LLUpdaterServiceImpl::~LLUpdaterServiceImpl()
+{
+	LL_INFOS("UpdaterService") << "shutting down updater service" << LL_ENDL;
+	LLEventPumps::instance().obtain("mainloop").stopListening(sListenerName);
+}
+
+void LLUpdaterServiceImpl::initialize(const std::string& protocol_version,
+									  const std::string& url, 
+									  const std::string& path,
+									  const std::string& channel,
+									  const std::string& version)
+{
+	if(mIsChecking || mIsDownloading)
+	{
+		throw LLUpdaterService::UsageError("LLUpdaterService::initialize call "
+										   "while updater is running.");
+	}
+		
+	mProtocolVersion = protocol_version;
+	mUrl = url;
+	mPath = path;
+	mChannel = channel;
+	mVersion = version;
+}
+
+void LLUpdaterServiceImpl::setCheckPeriod(unsigned int seconds)
+{
+	mCheckPeriod = seconds;
+}
+
+void LLUpdaterServiceImpl::startChecking(bool install_if_ready)
+{
+	if(mUrl.empty() || mChannel.empty() || mVersion.empty())
+	{
+		throw LLUpdaterService::UsageError("Set params before call to "
+			"LLUpdaterService::startCheck().");
+	}
+
+	mIsChecking = true;
+
+    // Check to see if an install is ready.
+	bool has_install = checkForInstall(install_if_ready);
+	if(!has_install)
+	{
+		checkForResume(); // will set mIsDownloading to true if resuming
+
+		if(!mIsDownloading)
+		{
+			// Checking can only occur during the mainloop.
+			// reset the timer to 0 so that the next mainloop event 
+			// triggers a check;
+			restartTimer(0); 
+		}
+	}
+}
+
+void LLUpdaterServiceImpl::stopChecking()
+{
+	if(mIsChecking)
+	{
+		mIsChecking = false;
+		stopTimer();
+	}
+
+    if(mIsDownloading)
+    {
+        mUpdateDownloader.cancel();
+		mIsDownloading = false;
+    }
+}
+
+bool LLUpdaterServiceImpl::isChecking()
+{
+	return mIsChecking;
+}
+
+bool LLUpdaterServiceImpl::checkForInstall(bool launchInstaller)
+{
+	bool foundInstall = false; // return true if install is found.
+
+	llifstream update_marker(update_marker_path(), 
+							 std::ios::in | std::ios::binary);
+
+	if(update_marker.is_open())
+	{
+		// Found an update info - now lets see if its valid.
+		LLSD update_info;
+		LLSDSerialize::fromXMLDocument(update_info, update_marker);
+		update_marker.close();
+
+		// Get the path to the installer file.
+		LLSD path = update_info.get("path");
+		if(update_info["current_version"].asString() != ll_get_version())
+		{
+			// This viewer is not the same version as the one that downloaded
+			// the update.  Do not install this update.
+			if(!path.asString().empty())
+			{
+				llinfos << "ignoring update dowloaded by different client version" << llendl;
+				LLFile::remove(path.asString());
+				LLFile::remove(update_marker_path());
+			}
+			else
+			{
+				; // Nothing to clean up.
+			}
+			
+			foundInstall = false;
+		} 
+		else if(path.isDefined() && !path.asString().empty())
+		{
+			if(launchInstaller)
+			{
+				LLFile::remove(update_marker_path());
+
+				int result = ll_install_update(install_script_path(),
+											   update_info["path"].asString(),
+											   install_script_mode());	
+				
+				if((result == 0) && mAppExitCallback)
+				{
+					mAppExitCallback();
+				} else if(result != 0) {
+					llwarns << "failed to run update install script" << LL_ENDL;
+				} else {
+					; // No op.
+				}
+			}
+			
+			foundInstall = true;
+		}
+	}
+	return foundInstall;
+}
+
+bool LLUpdaterServiceImpl::checkForResume()
+{
+	bool result = false;
+	std::string download_marker_path = mUpdateDownloader.downloadMarkerPath();
+	if(LLFile::isfile(download_marker_path))
+	{
+		llifstream download_marker_stream(download_marker_path, 
+								 std::ios::in | std::ios::binary);
+		if(download_marker_stream.is_open())
+		{
+			LLSD download_info;
+			LLSDSerialize::fromXMLDocument(download_info, download_marker_stream);
+			download_marker_stream.close();
+			if(download_info["current_version"].asString() == ll_get_version())
+			{
+				mIsDownloading = true;
+				mUpdateDownloader.resume();
+				result = true;
+			}
+			else 
+			{
+				// The viewer that started this download is not the same as this viewer; ignore.
+				llinfos << "ignoring partial download from different viewer version" << llendl;
+				std::string path = download_info["path"].asString();
+				if(!path.empty()) LLFile::remove(path);
+				LLFile::remove(download_marker_path);
+			}
+		} 
+	}
+	return result;
+}
+
+void LLUpdaterServiceImpl::error(std::string const & message)
+{
+	if(mIsChecking)
+	{
+		restartTimer(mCheckPeriod);
+	}
+}
+
+void LLUpdaterServiceImpl::optionalUpdate(std::string const & newVersion,
+										  LLURI const & uri,
+										  std::string const & hash)
+{
+	stopTimer();
+	mIsDownloading = true;
+	mUpdateDownloader.download(uri, hash);
+}
+
+void LLUpdaterServiceImpl::requiredUpdate(std::string const & newVersion,
+										  LLURI const & uri,
+										  std::string const & hash)
+{
+	stopTimer();
+	mIsDownloading = true;
+	mUpdateDownloader.download(uri, hash);
+}
+
+void LLUpdaterServiceImpl::upToDate(void)
+{
+	if(mIsChecking)
+	{
+		restartTimer(mCheckPeriod);
+	}
+}
+
+void LLUpdaterServiceImpl::downloadComplete(LLSD const & data) 
+{ 
+	mIsDownloading = false;
+
+	// Save out the download data to the SecondLifeUpdateReady
+	// marker file. 
+	llofstream update_marker(update_marker_path());
+	LLSDSerialize::toPrettyXML(data, update_marker);
+	
+	LLSD event;
+	event["pump"] = LLUpdaterService::pumpName();
+	LLSD payload;
+	payload["type"] = LLSD(LLUpdaterService::DOWNLOAD_COMPLETE);
+	event["payload"] = payload;
+	LLEventPumps::instance().obtain("mainlooprepeater").post(event);
+}
+
+void LLUpdaterServiceImpl::downloadError(std::string const & message) 
+{ 
+	LL_INFOS("UpdaterService") << "Error downloading: " << message << LL_ENDL;
+
+	mIsDownloading = false;
+
+	// Restart the timer on error
+	if(mIsChecking)
+	{
+		restartTimer(mCheckPeriod); 
+	}
+
+	LLSD event;
+	event["pump"] = LLUpdaterService::pumpName();
+	LLSD payload;
+	payload["type"] = LLSD(LLUpdaterService::DOWNLOAD_ERROR);
+	payload["message"] = message;
+	event["payload"] = payload;
+	LLEventPumps::instance().obtain("mainlooprepeater").post(event);
+}
+
+void LLUpdaterServiceImpl::restartTimer(unsigned int seconds)
+{
+	LL_INFOS("UpdaterService") << "will check for update again in " << 
+	seconds << " seconds" << LL_ENDL; 
+	mTimer.start();
+	mTimer.setTimerExpirySec(seconds);
+	LLEventPumps::instance().obtain("mainloop").listen(
+		sListenerName, boost::bind(&LLUpdaterServiceImpl::onMainLoop, this, _1));
+}
+
+void LLUpdaterServiceImpl::stopTimer()
+{
+	mTimer.stop();
+	LLEventPumps::instance().obtain("mainloop").stopListening(sListenerName);
+}
+
+bool LLUpdaterServiceImpl::onMainLoop(LLSD const & event)
+{
+	if(mTimer.getStarted() && mTimer.hasExpired())
+	{
+		stopTimer();
+
+		// Check for failed install.
+		if(LLFile::isfile(ll_install_failed_marker_path()))
+		{
+			// TODO: notify the user.
+			llinfos << "found marker " << ll_install_failed_marker_path() << llendl;
+			llinfos << "last install attempt failed" << llendl;
+			LLFile::remove(ll_install_failed_marker_path());
+			
+			LLSD event;
+			event["type"] = LLSD(LLUpdaterService::INSTALL_ERROR);
+			LLEventPumps::instance().obtain(LLUpdaterService::pumpName()).post(event);
+		}
+		else
+		{
+			mUpdateChecker.check(mProtocolVersion, mUrl, mPath, mChannel, mVersion);
+		}
+	} 
+	else 
+	{
+		// Keep on waiting...
+	}
+	
+	return false;
+}
+
+
+//-----------------------------------------------------------------------
+// Facade interface
+
+std::string const & LLUpdaterService::pumpName(void)
+{
+	static std::string name("updater_service");
+	return name;
+}
+
+LLUpdaterService::LLUpdaterService()
+{
+	if(gUpdater.expired())
+	{
+		mImpl = 
+			boost::shared_ptr<LLUpdaterServiceImpl>(new LLUpdaterServiceImpl());
+		gUpdater = mImpl;
+	}
+	else
+	{
+		mImpl = gUpdater.lock();
+	}
+}
+
+LLUpdaterService::~LLUpdaterService()
+{
+}
+
+void LLUpdaterService::initialize(const std::string& protocol_version,
+								 const std::string& url, 
+								 const std::string& path,
+								 const std::string& channel,
+								 const std::string& version)
+{
+	mImpl->initialize(protocol_version, url, path, channel, version);
+}
+
+void LLUpdaterService::setCheckPeriod(unsigned int seconds)
+{
+	mImpl->setCheckPeriod(seconds);
+}
+	
+void LLUpdaterService::startChecking(bool install_if_ready)
+{
+	mImpl->startChecking(install_if_ready);
+}
+
+void LLUpdaterService::stopChecking()
+{
+	mImpl->stopChecking();
+}
+
+bool LLUpdaterService::isChecking()
+{
+	return mImpl->isChecking();
+}
+
+void LLUpdaterService::setImplAppExitCallback(LLUpdaterService::app_exit_callback_t aecb)
+{
+	return mImpl->setAppExitCallback(aecb);
+}
+
+
+std::string const & ll_get_version(void) {
+	static std::string version("");
+	
+	if (version.empty()) {
+		std::ostringstream stream;
+		stream << LL_VERSION_MAJOR << "."
+		<< LL_VERSION_MINOR << "."
+		<< LL_VERSION_PATCH << "."
+		<< LL_VERSION_BUILD;
+		version = stream.str();
+	}
+	
+	return version;
+}
+
diff --git a/indra/viewer_components/updater/llupdaterservice.h b/indra/viewer_components/updater/llupdaterservice.h
new file mode 100644
index 0000000000..752a6f834b
--- /dev/null
+++ b/indra/viewer_components/updater/llupdaterservice.h
@@ -0,0 +1,85 @@
+/** 
+ * @file llupdaterservice.h
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_UPDATERSERVICE_H
+#define LL_UPDATERSERVICE_H
+
+#include <boost/shared_ptr.hpp>
+#include <boost/function.hpp>
+
+class LLUpdaterServiceImpl;
+
+class LLUpdaterService
+{
+public:
+	class UsageError: public std::runtime_error
+	{
+	public:
+		UsageError(const std::string& msg) : std::runtime_error(msg) {}
+	};
+	
+	// Name of the event pump through which update events will be delivered.
+	static std::string const & pumpName(void);
+	
+	// Type codes for events posted by this service.  Stored the event's 'type' element.
+	enum eUpdateEvent {
+		INVALID,
+		DOWNLOAD_COMPLETE,
+		DOWNLOAD_ERROR,
+		INSTALL_ERROR
+	};
+
+	LLUpdaterService();
+	~LLUpdaterService();
+
+	void initialize(const std::string& protocol_version,
+				    const std::string& url, 
+				    const std::string& path,
+				    const std::string& channel,
+				    const std::string& version);
+
+	void setCheckPeriod(unsigned int seconds);
+	
+	void startChecking(bool install_if_ready = false);
+	void stopChecking();
+	bool isChecking();
+
+	typedef boost::function<void (void)> app_exit_callback_t;
+	template <typename F>
+	void setAppExitCallback(F const &callable) 
+	{ 
+		app_exit_callback_t aecb = callable;
+		setImplAppExitCallback(aecb);
+	}
+
+private:
+	boost::shared_ptr<LLUpdaterServiceImpl> mImpl;
+	void setImplAppExitCallback(app_exit_callback_t aecb);
+};
+
+// Returns the full version as a string.
+std::string const & ll_get_version(void);
+
+#endif // LL_UPDATERSERVICE_H
diff --git a/indra/viewer_components/updater/scripts/darwin/update_install b/indra/viewer_components/updater/scripts/darwin/update_install
new file mode 100644
index 0000000000..b174b3570a
--- /dev/null
+++ b/indra/viewer_components/updater/scripts/darwin/update_install
@@ -0,0 +1,9 @@
+#! /bin/bash
+
+#
+# The first argument contains the path to the installer app.  The second a path
+# to a marker file which should be created if the installer fails.q
+#
+
+open ../Resources/mac-updater.app --args -dmg "$1" -name "Second Life Viewer 2" -marker "$2"
+exit 0
diff --git a/indra/viewer_components/updater/scripts/linux/update_install b/indra/viewer_components/updater/scripts/linux/update_install
new file mode 100644
index 0000000000..fef5ef7d09
--- /dev/null
+++ b/indra/viewer_components/updater/scripts/linux/update_install
@@ -0,0 +1,10 @@
+#! /bin/bash
+INSTALL_DIR=$(cd "$(dirname $0)/.." ; pwd)
+export LD_LIBRARY_PATH=$INSTALL_DIR/lib
+bin/linux-updater.bin --file "$1" --dest "$INSTALL_DIR" --name "Second Life Viewer 2" --stringsdir "$INSTALL_DIR/skins/default/xui/en" --stringsfile "strings.xml"
+
+if [ $? -ne 0 ]
+   then touch $2
+fi
+
+rm -f $1
diff --git a/indra/viewer_components/updater/scripts/windows/update_install.bat b/indra/viewer_components/updater/scripts/windows/update_install.bat
new file mode 100644
index 0000000000..42e148a707
--- /dev/null
+++ b/indra/viewer_components/updater/scripts/windows/update_install.bat
@@ -0,0 +1,3 @@
+start /WAIT %1 /SKIP_DIALOGS

+IF ERRORLEVEL 1 ECHO %ERRORLEVEL% > %2

+DEL %1

diff --git a/indra/viewer_components/updater/tests/llupdaterservice_test.cpp b/indra/viewer_components/updater/tests/llupdaterservice_test.cpp
new file mode 100644
index 0000000000..04ed4e6364
--- /dev/null
+++ b/indra/viewer_components/updater/tests/llupdaterservice_test.cpp
@@ -0,0 +1,199 @@
+/**

+ * @file   llupdaterservice_test.cpp

+ * @brief  Tests of llupdaterservice.cpp.

+ * 

+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$

+ * 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

+ * $/LicenseInfo$

+ */

+

+// Precompiled header

+#include "linden_common.h"

+// associated header

+#include "../llupdaterservice.h"

+#include "../llupdatechecker.h"

+#include "../llupdatedownloader.h"

+#include "../llupdateinstaller.h"

+

+#include "../../../test/lltut.h"

+//#define DEBUG_ON

+#include "../../../test/debug.h"

+

+#include "llevents.h"

+#include "lldir.h"

+

+/*****************************************************************************

+*   MOCK'd

+*****************************************************************************/

+LLUpdateChecker::LLUpdateChecker(LLUpdateChecker::Client & client)

+{}

+void LLUpdateChecker::check(std::string const & protocolVersion, std::string const & hostUrl, 

+								  std::string const & servicePath, std::string channel, std::string version)

+{}

+LLUpdateDownloader::LLUpdateDownloader(Client & ) {}

+void LLUpdateDownloader::download(LLURI const & , std::string const &){}

+

+class LLDir_Mock : public LLDir

+{

+	void initAppDirs(const std::string &app_name, 

+		   			 const std::string& app_read_only_data_dir = "") {}

+	U32 countFilesInDir(const std::string &dirname, const std::string &mask) 

+	{

+		return 0;

+	}

+

+	BOOL getNextFileInDir(const std::string &dirname, 

+						  const std::string &mask, 

+						  std::string &fname) 

+	{

+		return false;

+	}

+	void getRandomFileInDir(const std::string &dirname, 

+							const std::string &mask, 

+							std::string &fname) {}

+	std::string getCurPath() { return ""; }

+	BOOL fileExists(const std::string &filename) const { return false; }

+	std::string getLLPluginLauncher() { return ""; }

+	std::string getLLPluginFilename(std::string base_name) { return ""; }

+

+} gDirUtil;

+LLDir* gDirUtilp = &gDirUtil;

+LLDir::LLDir() {}

+LLDir::~LLDir() {}

+S32 LLDir::deleteFilesInDir(const std::string &dirname, 

+							const std::string &mask)

+{ return 0; }

+

+void LLDir::setChatLogsDir(const std::string &path){}		

+void LLDir::setPerAccountChatLogsDir(const std::string &username){}

+void LLDir::setLindenUserDir(const std::string &username){}		

+void LLDir::setSkinFolder(const std::string &skin_folder){}

+bool LLDir::setCacheDir(const std::string &path){ return true; }

+void LLDir::dumpCurrentDirectories() {}

+

+std::string LLDir::getExpandedFilename(ELLPath location, 

+									   const std::string &filename) const 

+{

+	return "";

+}

+

+std::string LLUpdateDownloader::downloadMarkerPath(void)

+{

+	return "";

+}

+

+void LLUpdateDownloader::resume(void) {}

+void LLUpdateDownloader::cancel(void) {}

+

+int ll_install_update(std::string const &, std::string const &, LLInstallScriptMode)

+{

+	return 0;

+}

+

+std::string const & ll_install_failed_marker_path()

+{

+	static std::string wubba;

+	return wubba;

+}

+

+/*

+#pragma warning(disable: 4273)

+llus_mock_llifstream::llus_mock_llifstream(const std::string& _Filename,

+										   ios_base::openmode _Mode,

+										   int _Prot) :

+	std::basic_istream<char,std::char_traits< char > >(NULL,true)

+{}

+

+llus_mock_llifstream::~llus_mock_llifstream() {}

+bool llus_mock_llifstream::is_open() const {return true;}

+void llus_mock_llifstream::close() {}

+*/

+

+/*****************************************************************************

+*   TUT

+*****************************************************************************/

+namespace tut

+{

+    struct llupdaterservice_data

+    {

+		llupdaterservice_data() :

+            pumps(LLEventPumps::instance()),

+			test_url("dummy_url"),

+			test_channel("dummy_channel"),

+			test_version("dummy_version")

+		{}

+		LLEventPumps& pumps;

+		std::string test_url;

+		std::string test_channel;

+		std::string test_version;

+	};

+

+    typedef test_group<llupdaterservice_data> llupdaterservice_group;

+    typedef llupdaterservice_group::object llupdaterservice_object;

+    llupdaterservice_group llupdaterservicegrp("LLUpdaterService");

+

+    template<> template<>

+    void llupdaterservice_object::test<1>()

+    {

+        DEBUG;

+		LLUpdaterService updater;

+		bool got_usage_error = false;

+		try

+		{

+			updater.startChecking();

+		}

+		catch(LLUpdaterService::UsageError)

+		{

+			got_usage_error = true;

+		}

+		ensure("Caught start before params", got_usage_error);

+	}

+

+    template<> template<>

+    void llupdaterservice_object::test<2>()

+    {

+        DEBUG;

+		LLUpdaterService updater;

+		bool got_usage_error = false;

+		try

+		{

+			updater.initialize("1.0",test_url, "update" ,test_channel, test_version);

+			updater.startChecking();

+			updater.initialize("1.0", "other_url", "update", test_channel, test_version);

+		}

+		catch(LLUpdaterService::UsageError)

+		{

+			got_usage_error = true;

+		}

+		ensure("Caught params while running", got_usage_error);

+	}

+

+    template<> template<>

+    void llupdaterservice_object::test<3>()

+    {

+        DEBUG;

+		LLUpdaterService updater;

+		updater.initialize("1.0", test_url, "update", test_channel, test_version);

+		updater.startChecking();

+		ensure(updater.isChecking());

+		updater.stopChecking();

+		ensure(!updater.isChecking());

+	}

+}