merge changes for 3.7.19-release

1 files changed, 284 insertions, 240 deletions

diff --git a/indra/newview/llmeshrepository.cpp b/indra/newview/llmeshrepository.cpp
index 8f50555a73..648056484e 100755
--- a/indra/newview/llmeshrepository.cpp
+++ b/indra/newview/llmeshrepository.cpp
@@ -1,4 +1,3 @@
-
 /** 
  * @file llmeshrepository.cpp
  * @brief Mesh repository implementation.
@@ -72,6 +71,7 @@
 #include "bufferarray.h"
 #include "bufferstream.h"
 #include "llfasttimer.h"
+#include "llcorehttputil.h"
 
 #include "boost/lexical_cast.hpp"
 
@@ -338,14 +338,17 @@ static LLFastTimer::DeclareTimer FTM_MESH_FETCH("Mesh Fetch");
 LLMeshRepository gMeshRepo;
 
 const S32 MESH_HEADER_SIZE = 4096;                      // Important:  assumption is that headers fit in this space
+
 const S32 REQUEST_HIGH_WATER_MIN = 32;					// Limits for GetMesh regions
 const S32 REQUEST_HIGH_WATER_MAX = 150;					// Should remain under 2X throttle
 const S32 REQUEST_LOW_WATER_MIN = 16;
 const S32 REQUEST_LOW_WATER_MAX = 75;
+
 const S32 REQUEST2_HIGH_WATER_MIN = 32;					// Limits for GetMesh2 regions
-const S32 REQUEST2_HIGH_WATER_MAX = 80;
+const S32 REQUEST2_HIGH_WATER_MAX = 100;
 const S32 REQUEST2_LOW_WATER_MIN = 16;
-const S32 REQUEST2_LOW_WATER_MAX = 40;
+const S32 REQUEST2_LOW_WATER_MAX = 50;
+
 const U32 LARGE_MESH_FETCH_THRESHOLD = 1U << 21;		// Size at which requests goes to narrow/slow queue
 const long SMALL_MESH_XFER_TIMEOUT = 120L;				// Seconds to complete xfer, small mesh downloads
 const long LARGE_MESH_XFER_TIMEOUT = 600L;				// Seconds to complete xfer, large downloads
@@ -518,11 +521,13 @@ class LLMeshHandlerBase : public LLCore::HttpHandler
 {
 public:
 	LOG_CLASS(LLMeshHandlerBase);
-	LLMeshHandlerBase()
+	LLMeshHandlerBase(U32 offset, U32 requested_bytes)
 		: LLCore::HttpHandler(),
 		  mMeshParams(),
 		  mProcessed(false),
-		  mHttpHandle(LLCORE_HTTP_HANDLE_INVALID)
+		  mHttpHandle(LLCORE_HTTP_HANDLE_INVALID),
+		  mOffset(offset),
+		  mRequestedBytes(requested_bytes)
 		{}
 
 	virtual ~LLMeshHandlerBase()
@@ -534,13 +539,15 @@ protected:
 	
 public:
 	virtual void onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response);
-	virtual void processData(LLCore::BufferArray * body, U8 * data, S32 data_size) = 0;
+	virtual void processData(LLCore::BufferArray * body, S32 body_offset, U8 * data, S32 data_size) = 0;
 	virtual void processFailure(LLCore::HttpStatus status) = 0;
 	
 public:
 	LLVolumeParams mMeshParams;
 	bool mProcessed;
-	LLCore::HttpHandle	mHttpHandle;
+	LLCore::HttpHandle mHttpHandle;
+	U32 mOffset;
+	U32 mRequestedBytes;
 };
 
 
@@ -551,8 +558,8 @@ class LLMeshHeaderHandler : public LLMeshHandlerBase
 {
 public:
 	LOG_CLASS(LLMeshHeaderHandler);
-	LLMeshHeaderHandler(const LLVolumeParams & mesh_params)
-		: LLMeshHandlerBase()
+	LLMeshHeaderHandler(const LLVolumeParams & mesh_params, U32 offset, U32 requested_bytes)
+		: LLMeshHandlerBase(offset, requested_bytes)
 	{
 		mMeshParams = mesh_params;
 		LLMeshRepoThread::incActiveHeaderRequests();
@@ -564,7 +571,7 @@ protected:
 	void operator=(const LLMeshHeaderHandler &);				// Not defined
 	
 public:
-	virtual void processData(LLCore::BufferArray * body, U8 * data, S32 data_size);
+	virtual void processData(LLCore::BufferArray * body, S32 body_offset, U8 * data, S32 data_size);
 	virtual void processFailure(LLCore::HttpStatus status);
 };
 
@@ -573,17 +580,16 @@ public:
 //
 // Thread:  repo
 class LLMeshLODHandler : public LLMeshHandlerBase
-	{
+{
 public:
+	LOG_CLASS(LLMeshLODHandler);
 	LLMeshLODHandler(const LLVolumeParams & mesh_params, S32 lod, U32 offset, U32 requested_bytes)
-		: LLMeshHandlerBase(),
-		  mLOD(lod),
-		  mRequestedBytes(requested_bytes),
-		  mOffset(offset)
+		: LLMeshHandlerBase(offset, requested_bytes),
+		  mLOD(lod)
 		{
-		mMeshParams = mesh_params;
-		LLMeshRepoThread::incActiveLODRequests();
-			}
+			mMeshParams = mesh_params;
+			LLMeshRepoThread::incActiveLODRequests();
+		}
 	virtual ~LLMeshLODHandler();
 
 protected:
@@ -591,13 +597,11 @@ protected:
 	void operator=(const LLMeshLODHandler &);					// Not defined
 
 public:
-	virtual void processData(LLCore::BufferArray * body, U8 * data, S32 data_size);
+	virtual void processData(LLCore::BufferArray * body, S32 body_offset, U8 * data, S32 data_size);
 	virtual void processFailure(LLCore::HttpStatus status);
 
 public:
 	S32 mLOD;
-	U32 mRequestedBytes;
-	U32 mOffset;
 };
 
 
@@ -605,14 +609,12 @@ public:
 //
 // Thread:  repo
 class LLMeshSkinInfoHandler : public LLMeshHandlerBase
-	{
+{
 public:
 	LOG_CLASS(LLMeshSkinInfoHandler);
-	LLMeshSkinInfoHandler(const LLUUID& id, U32 offset, U32 size)
-		: LLMeshHandlerBase(),
-		  mMeshID(id),
-		  mRequestedBytes(size),
-		  mOffset(offset)
+	LLMeshSkinInfoHandler(const LLUUID& id, U32 offset, U32 requested_bytes)
+		: LLMeshHandlerBase(offset, requested_bytes),
+		  mMeshID(id)
 	{}
 	virtual ~LLMeshSkinInfoHandler();
 
@@ -621,13 +623,11 @@ protected:
 	void operator=(const LLMeshSkinInfoHandler &);				// Not defined
 
 public:
-	virtual void processData(LLCore::BufferArray * body, U8 * data, S32 data_size);
+	virtual void processData(LLCore::BufferArray * body, S32 body_offset, U8 * data, S32 data_size);
 	virtual void processFailure(LLCore::HttpStatus status);
 
 public:
 	LLUUID mMeshID;
-	U32 mRequestedBytes;
-	U32 mOffset;
 };
 
 
@@ -635,14 +635,12 @@ public:
 //
 // Thread:  repo
 class LLMeshDecompositionHandler : public LLMeshHandlerBase
-	{
+{
 public:
 	LOG_CLASS(LLMeshDecompositionHandler);
-	LLMeshDecompositionHandler(const LLUUID& id, U32 offset, U32 size)
-		: LLMeshHandlerBase(),
-		  mMeshID(id),
-		  mRequestedBytes(size),
-		  mOffset(offset)
+	LLMeshDecompositionHandler(const LLUUID& id, U32 offset, U32 requested_bytes)
+		: LLMeshHandlerBase(offset, requested_bytes),
+		  mMeshID(id)
 	{}
 	virtual ~LLMeshDecompositionHandler();
 
@@ -651,13 +649,11 @@ protected:
 	void operator=(const LLMeshDecompositionHandler &);					// Not defined
 
 public:
-	virtual void processData(LLCore::BufferArray * body, U8 * data, S32 data_size);
+	virtual void processData(LLCore::BufferArray * body, S32 body_offset, U8 * data, S32 data_size);
 	virtual void processFailure(LLCore::HttpStatus status);
 
 public:
 	LLUUID mMeshID;
-	U32 mRequestedBytes;
-	U32 mOffset;
 };
 
 
@@ -665,14 +661,12 @@ public:
 //
 // Thread:  repo
 class LLMeshPhysicsShapeHandler : public LLMeshHandlerBase
-	{
+{
 public:
 	LOG_CLASS(LLMeshPhysicsShapeHandler);
-	LLMeshPhysicsShapeHandler(const LLUUID& id, U32 offset, U32 size)
-		: LLMeshHandlerBase(),
-		  mMeshID(id),
-		  mRequestedBytes(size),
-		  mOffset(offset)
+	LLMeshPhysicsShapeHandler(const LLUUID& id, U32 offset, U32 requested_bytes)
+		: LLMeshHandlerBase(offset, requested_bytes),
+		  mMeshID(id)
 	{}
 	virtual ~LLMeshPhysicsShapeHandler();
 
@@ -681,13 +675,11 @@ protected:
 	void operator=(const LLMeshPhysicsShapeHandler &);				// Not defined
 
 public:
-	virtual void processData(LLCore::BufferArray * body, U8 * data, S32 data_size);
+	virtual void processData(LLCore::BufferArray * body, S32 body_offset, U8 * data, S32 data_size);
 	virtual void processFailure(LLCore::HttpStatus status);
 
 public:
 	LLUUID mMeshID;
-	U32 mRequestedBytes;
-	U32 mOffset;
 };
 
 
@@ -713,8 +705,8 @@ void log_upload_error(LLCore::HttpStatus status, const LLSD& content,
 		LL_WARNS(LOG_MESH) << "error: " << err << LL_ENDL;
 		LL_WARNS(LOG_MESH) << "  mesh upload failed, stage '" << stage
 						   << "', error '" << err["error"].asString()
-				<< "', message '" << err["message"].asString()
-				<< "', id '" << err["identifier"].asString()
+						   << "', message '" << err["message"].asString()
+						   << "', id '" << err["identifier"].asString()
 						   << "'" << LL_ENDL;
 		if (err.has("errors"))
 		{
@@ -754,7 +746,9 @@ LLMeshRepoThread::LLMeshRepoThread()
   mHttpLargePolicyClass(LLCore::HttpRequest::DEFAULT_POLICY_ID),
   mHttpPriority(0),
   mGetMeshVersion(2)
-	{
+{
+	LLAppCoreHttp & app_core_http(LLAppViewer::instance()->getAppCoreHttp());
+
 	mMutex = new LLMutex(NULL);
 	mHeaderMutex = new LLMutex(NULL);
 	mSignal = new LLCondition(NULL);
@@ -766,15 +760,15 @@ LLMeshRepoThread::LLMeshRepoThread()
 	mHttpLargeOptions->setTransferTimeout(LARGE_MESH_XFER_TIMEOUT);
 	mHttpLargeOptions->setUseRetryAfter(gSavedSettings.getBOOL("MeshUseHttpRetryAfter"));
 	mHttpHeaders = new LLCore::HttpHeaders;
-	mHttpHeaders->append("Accept", "application/vnd.ll.mesh");
-	mHttpPolicyClass = LLAppViewer::instance()->getAppCoreHttp().getPolicy(LLAppCoreHttp::AP_MESH2);
-	mHttpLegacyPolicyClass = LLAppViewer::instance()->getAppCoreHttp().getPolicy(LLAppCoreHttp::AP_MESH1);
-	mHttpLargePolicyClass = LLAppViewer::instance()->getAppCoreHttp().getPolicy(LLAppCoreHttp::AP_LARGE_MESH);
-	}
+	mHttpHeaders->append(HTTP_OUT_HEADER_ACCEPT, HTTP_CONTENT_VND_LL_MESH);
+	mHttpPolicyClass = app_core_http.getPolicy(LLAppCoreHttp::AP_MESH2);
+	mHttpLegacyPolicyClass = app_core_http.getPolicy(LLAppCoreHttp::AP_MESH1);
+	mHttpLargePolicyClass = app_core_http.getPolicy(LLAppCoreHttp::AP_LARGE_MESH);
+}
 
 			
 LLMeshRepoThread::~LLMeshRepoThread()
-		{
+{
 	LL_INFOS(LOG_MESH) << "Small GETs issued:  " << LLMeshRepository::sHTTPRequestCount
 					   << ", Large GETs issued:  " << LLMeshRepository::sHTTPLargeRequestCount
 					   << ", Max Lock Holdoffs:  " << LLMeshRepository::sMaxLockHoldoffs
@@ -785,23 +779,23 @@ LLMeshRepoThread::~LLMeshRepoThread()
 		 ++iter)
 	{
 		delete *iter;
-		}
+	}
 	mHttpRequestSet.clear();
 	if (mHttpHeaders)
-		{
+	{
 		mHttpHeaders->release();
 		mHttpHeaders = NULL;
-		}
+	}
 	if (mHttpOptions)
-		{
+	{
 		mHttpOptions->release();
 		mHttpOptions = NULL;
-			}
+	}
 	if (mHttpLargeOptions)
-{ 
+	{
 		mHttpLargeOptions->release();
 		mHttpLargeOptions = NULL;
-}
+	}
 	delete mHttpRequest;
 	mHttpRequest = NULL;
 	delete mMutex;
@@ -846,48 +840,49 @@ void LLMeshRepoThread::run()
 		{
 			// Dispatch all HttpHandler notifications
 			mHttpRequest->update(0L);
-			}
+		}
 		sRequestWaterLevel = mHttpRequestSet.size();			// Stats data update
 
 		// NOTE: order of queue processing intentionally favors LOD requests over header requests
 			
 		while (!mLODReqQ.empty() && mHttpRequestSet.size() < sRequestHighWater)
-			{
+		{
 			if (! mMutex)
-				{
+			{
 				break;
 			}
-					mMutex->lock();
-					LODRequest req = mLODReqQ.front();
-					mLODReqQ.pop();
-					LLMeshRepository::sLODProcessing--;
-					mMutex->unlock();
+			mMutex->lock();
+			LODRequest req = mLODReqQ.front();
+			mLODReqQ.pop();
+			LLMeshRepository::sLODProcessing--;
+			mMutex->unlock();
+
 			if (!fetchMeshLOD(req.mMeshParams, req.mLOD))		// failed, resubmit
-					{
-						mMutex->lock();
-						mLODReqQ.push(req); 
+			{
+				mMutex->lock();
+				mLODReqQ.push(req); 
 				++LLMeshRepository::sLODProcessing;
-						mMutex->unlock();
-					}
-				}
+				mMutex->unlock();
+			}
+		}
 
 		while (!mHeaderReqQ.empty() && mHttpRequestSet.size() < sRequestHighWater)
-			{
+		{
 			if (! mMutex)
-				{
+			{
 				break;
 			}
-					mMutex->lock();
-					HeaderRequest req = mHeaderReqQ.front();
-					mHeaderReqQ.pop();
-					mMutex->unlock();
+			mMutex->lock();
+			HeaderRequest req = mHeaderReqQ.front();
+			mHeaderReqQ.pop();
+			mMutex->unlock();
 			if (!fetchMeshHeader(req.mMeshParams))//failed, resubmit
-					{
-						mMutex->lock();
-						mHeaderReqQ.push(req) ;
-						mMutex->unlock();
-					}
-				}
+			{
+				mMutex->lock();
+				mHeaderReqQ.push(req) ;
+				mMutex->unlock();
+			}
+		}
 
 		// For the final three request lists, similar goal to above but
 		// slightly different queue structures.  Stay off the mutex when
@@ -983,7 +978,7 @@ void LLMeshRepoThread::run()
 				}
 			}
 			mMutex->unlock();
-			}
+		}
 
 		// For dev purposes only.  A dynamic change could make this false
 		// and that shouldn't assert.
@@ -1131,6 +1126,9 @@ LLCore::HttpHandle LLMeshRepoThread::getByteRange(const std::string & url, int c
 												  size_t offset, size_t len,
 												  LLCore::HttpHandler * handler)
 {
+	// Also used in lltexturefetch.cpp
+	static LLCachedControl<bool> disable_range_req(gSavedSettings, "HttpRangeRequestsDisable", false);
+	
 	LLCore::HttpHandle handle(LLCORE_HTTP_HANDLE_INVALID);
 	
 	if (len < LARGE_MESH_FETCH_THRESHOLD)
@@ -1140,8 +1138,8 @@ LLCore::HttpHandle LLMeshRepoThread::getByteRange(const std::string & url, int c
 													: mHttpLegacyPolicyClass),
 												   mHttpPriority,
 												   url,
-												   offset,
-												   len,
+												   (disable_range_req ? size_t(0) : offset),
+												   (disable_range_req ? size_t(0) : len),
 												   mHttpOptions,
 												   mHttpHeaders,
 												   handler);
@@ -1155,8 +1153,8 @@ LLCore::HttpHandle LLMeshRepoThread::getByteRange(const std::string & url, int c
 		handle = mHttpRequest->requestGetByteRange(mHttpLargePolicyClass,
 												   mHttpPriority,
 												   url,
-												   offset,
-												   len,
+												   (disable_range_req ? size_t(0) : offset),
+												   (disable_range_req ? size_t(0) : len),
 												   mHttpLargeOptions,
 												   mHttpHeaders,
 												   handler);
@@ -1250,7 +1248,6 @@ bool LLMeshRepoThread::fetchMeshSkinInfo(const LLUUID& mesh_id)
 									   << LL_ENDL;
 					delete handler;
 					ret = false;
-
 				}
 				else
 				{
@@ -1527,7 +1524,7 @@ bool LLMeshRepoThread::fetchMeshHeader(const LLVolumeParams& mesh_params)
 		//within the first 4KB
 		//NOTE -- this will break of headers ever exceed 4KB		
 
-		LLMeshHeaderHandler * handler = new LLMeshHeaderHandler(mesh_params);
+		LLMeshHeaderHandler * handler = new LLMeshHeaderHandler(mesh_params, 0, MESH_HEADER_SIZE);
 		LLCore::HttpHandle handle = getByteRange(http_url, cap_version, 0, MESH_HEADER_SIZE, handler);
 		if (LLCORE_HTTP_HANDLE_INVALID == handle)
 		{
@@ -1860,7 +1857,7 @@ LLMeshUploadThread::LLMeshUploadThread(LLMeshUploadThread::instance_list& data,
 									   bool upload_skin, bool upload_joints, const std::string & upload_url, bool do_upload,
 									   LLHandle<LLWholeModelFeeObserver> fee_observer,
 									   LLHandle<LLWholeModelUploadObserver> upload_observer)
-: LLThread("mesh upload"),
+  : LLThread("mesh upload"),
 	LLCore::HttpHandler(),
 	mDiscarded(false),
 	mDoUpload(do_upload),
@@ -1890,7 +1887,7 @@ LLMeshUploadThread::LLMeshUploadThread(LLMeshUploadThread::instance_list& data,
 	mHttpOptions->setUseRetryAfter(gSavedSettings.getBOOL("MeshUseHttpRetryAfter"));
 	mHttpOptions->setRetries(UPLOAD_RETRY_LIMIT);
 	mHttpHeaders = new LLCore::HttpHeaders;
-	mHttpHeaders->append("Content-Type", "application/llsd+xml");
+	mHttpHeaders->append(HTTP_OUT_HEADER_CONTENT_TYPE, HTTP_CONTENT_LLSD_XML);
 	mHttpPolicyClass = LLAppViewer::instance()->getAppCoreHttp().getPolicy(LLAppCoreHttp::AP_UPLOADS);
 	mHttpPriority = 0;
 }
@@ -2240,21 +2237,17 @@ void LLMeshUploadThread::doWholeModelUpload()
 		mModelData = LLSD::emptyMap();
 		wholeModelToLLSD(mModelData, true);
 		LLSD body = mModelData["asset_resources"];
-		dump_llsd_to_file(body,make_dump_name("whole_model_body_",dump_num));
-
-		LLCore::BufferArray * ba = new LLCore::BufferArray;
-		LLCore::BufferArrayStream bas(ba);
-		LLSDSerialize::toXML(body, bas);
-		// LLSDSerialize::toXML(mModelData, bas);		// <- Enabling this will generate a convenient upload error
-		LLCore::HttpHandle handle = mHttpRequest->requestPost(mHttpPolicyClass,
-															  mHttpPriority,
-															  mWholeModelUploadURL,
-															  ba,
-															  mHttpOptions,
-															  mHttpHeaders,
-															  this);
-		ba->release();
-		
+
+		dump_llsd_to_file(body, make_dump_name("whole_model_body_", dump_num));
+
+		LLCore::HttpHandle handle = LLCoreHttpUtil::requestPostWithLLSD(mHttpRequest,
+																		mHttpPolicyClass,
+																		mHttpPriority,
+																		mWholeModelUploadURL,
+																		body,
+																		mHttpOptions,
+																		mHttpHeaders,
+																		this);
 		if (LLCORE_HTTP_HANDLE_INVALID == handle)
 		{
 			mHttpStatus = mHttpRequest->getStatus();
@@ -2271,7 +2264,7 @@ void LLMeshUploadThread::doWholeModelUpload()
 			
 			mHttpRequest->update(0);
 			while (! LLApp::isQuitting() && ! finished() && ! isDiscarded())
-		{
+			{
 				ms_sleep(sleep_time);
 				sleep_time = llmin(250U, sleep_time + sleep_time);
 				mHttpRequest->update(0);
@@ -2287,7 +2280,7 @@ void LLMeshUploadThread::doWholeModelUpload()
 			}
 		}
 	}
-			}
+}
 
 void LLMeshUploadThread::requestWholeModelFee()
 {
@@ -2298,19 +2291,14 @@ void LLMeshUploadThread::requestWholeModelFee()
 	mModelData = LLSD::emptyMap();
 	wholeModelToLLSD(mModelData, false);
 	dump_llsd_to_file(mModelData, make_dump_name("whole_model_fee_request_", dump_num));
-
-	LLCore::BufferArray * ba = new LLCore::BufferArray;
-	LLCore::BufferArrayStream bas(ba);
-	LLSDSerialize::toXML(mModelData, bas);
-		
-	LLCore::HttpHandle handle = mHttpRequest->requestPost(mHttpPolicyClass,
-														  mHttpPriority,
-														  mWholeModelFeeCapability,
-														  ba,
-														  mHttpOptions,
-														  mHttpHeaders,
-														  this);
-	ba->release();
+	LLCore::HttpHandle handle = LLCoreHttpUtil::requestPostWithLLSD(mHttpRequest,
+																	mHttpPolicyClass,
+																	mHttpPriority,
+																	mWholeModelFeeCapability,
+																	mModelData,
+																	mHttpOptions,
+																	mHttpHeaders,
+																	this);
 	if (LLCORE_HTTP_HANDLE_INVALID == handle)
 	{
 		mHttpStatus = mHttpRequest->getStatus();
@@ -2318,7 +2306,7 @@ void LLMeshUploadThread::requestWholeModelFee()
 		LL_WARNS(LOG_MESH) << "Couldn't issue request for model fee.  Reason:  " << mHttpStatus.toString()
 						   << " (" << mHttpStatus.toTerseString() << ")"
 						   << LL_ENDL;
-		}
+	}
 	else
 	{
 		U32 sleep_time(10);
@@ -2335,7 +2323,7 @@ void LLMeshUploadThread::requestWholeModelFee()
 			LL_DEBUGS(LOG_MESH) << "Mesh fee query operation discarded." << LL_ENDL;
 		}
 	}
-	}
+}
 
 
 // Does completion duty for both fee queries and actual uploads.
@@ -2383,17 +2371,13 @@ void LLMeshUploadThread::onCompleted(LLCore::HttpHandle handle, LLCore::HttpResp
 			}
 			else
 			{
-				LLCore::BufferArray * ba(response->getBody());
-				if (ba && ba->size())
-				{
-					LLCore::BufferArrayStream bas(ba);
-					LLSDSerialize::fromXML(body, bas);
-}
+				// *TODO:  handle error in conversion process
+				LLCoreHttpUtil::responseToLLSD(response, true, body);
 			}
 			dump_llsd_to_file(body, make_dump_name("whole_model_upload_response_", dump_num));
 
 			if (body["state"].asString() == "complete")
-{
+			{
 				// requested "mesh" asset type isn't actually the type
 				// of the resultant object, fix it up here.
 				mModelData["asset_type"] = "object";
@@ -2446,18 +2430,14 @@ void LLMeshUploadThread::onCompleted(LLCore::HttpHandle handle, LLCore::HttpResp
 				body = llsd_from_file("fake_upload_error.xml");
 			}
 			else
-	{
-				LLCore::BufferArray * ba(response->getBody());
-				if (ba && ba->size())
-		{
-					LLCore::BufferArrayStream bas(ba);
-					LLSDSerialize::fromXML(body, bas);
-		}
-	}
+			{
+				// *TODO:  handle error in conversion process
+				LLCoreHttpUtil::responseToLLSD(response, true, body);
+			}
 			dump_llsd_to_file(body, make_dump_name("whole_model_fee_response_", dump_num));
 
 			if (body["state"].asString() == "upload")
-	{
+			{
 				mWholeModelUploadURL = body["uploader"].asString();
 
 				if (observer)
@@ -2543,18 +2523,18 @@ void LLMeshRepoThread::notifyLoadedMeshes()
 				skin_info_q.swap(mSkinInfoQ);
 			}
 			if (! mDecompositionQ.empty())
-	{
+			{
 				decomp_q.swap(mDecompositionQ);
-	}
+			}
 
 			mMutex->unlock();
 
 			// Process the elements free of the lock
 			while (! skin_info_q.empty())
-	{
+			{
 				gMeshRepo.notifySkinInfoReceived(skin_info_q.front());
 				skin_info_q.pop_front();
-	}
+			}
 
 			while (! decomp_q.empty())
 			{
@@ -2648,6 +2628,17 @@ void LLMeshRepository::cacheOutgoingMesh(LLMeshUploadData& data, LLSD& header)
 
 }
 
+// Handle failed or successful requests for mesh assets.
+//
+// Support for 200 responses was added for several reasons.  One,
+// a service or cache can ignore range headers and give us a
+// 200 with full asset should it elect to.  We also support
+// a debug flag which disables range requests for those very
+// few users that have some sort of problem with their networking
+// services.  But the 200 response handling is suboptimal:  rather
+// than cache the whole asset, we just extract the part that would
+// have been sent in a 206 and process that.  Inefficient but these
+// are cases far off the norm.
 void LLMeshHandlerBase::onCompleted(LLCore::HttpHandle handle, LLCore::HttpResponse * response)
 {
 	mProcessed = true;
@@ -2676,35 +2667,78 @@ void LLMeshHandlerBase::onCompleted(LLCore::HttpHandle handle, LLCore::HttpRespo
 		// rather than partial) and 416 (request completely unsatisfyable).
 		// Always been exposed to these but are less likely here where
 		// speculative loads aren't done.
-		static const LLCore::HttpStatus par_status(HTTP_PARTIAL_CONTENT);
+		LLCore::BufferArray * body(response->getBody());
+		S32 body_offset(0);
+		U8 * data(NULL);
+		S32 data_size(body ? body->size() : 0);
 
-		if (par_status != status)
+		if (data_size > 0)
 		{
-			LL_WARNS_ONCE(LOG_MESH) << "Non-206 successful status received for fetch:  "
-									<< status.toTerseString() << LL_ENDL;
-		}
+			static const LLCore::HttpStatus par_status(HTTP_PARTIAL_CONTENT);
+			
+			unsigned int offset(0), length(0), full_length(0);
+				
+			if (par_status == status)
+			{
+				// 206 case
+				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...`
+					// length = data_size;
+					offset = mOffset;
+				}
+			}
+			else
+			{
+				// 200 case, typically
+				offset = 0;
+			}
 
-		LLCore::BufferArray * body(response->getBody());
-		S32 data_size(body ? body->size() : 0);
-		U8 * data(NULL);
+			// *DEBUG:  To test validation below
+			// offset += 1;
 
-	if (data_size > 0)
-	{
+			// Validate that what we think we received is consistent with
+			// what we've asked for.  I.e. first byte we wanted lies somewhere
+			// in the response.
+			if (offset > mOffset
+				|| (offset + data_size) <= mOffset
+				|| (mOffset - offset) >= data_size)
+			{
+				// No overlap with requested range.  Fail request with
+				// suitable error.  Shouldn't happen unless server/cache/ISP
+				// is doing something awful.
+				LL_WARNS(LOG_MESH) << "Mesh response (bytes ["
+								   << offset << ".." << (offset + length - 1)
+								   << "]) didn't overlap with request's origin (bytes ["
+								   << mOffset << ".." << (mOffset + mRequestedBytes - 1)
+								   << "])." << LL_ENDL;
+				processFailure(LLCore::HttpStatus(LLCore::HttpStatus::LLCORE, LLCore::HE_INV_CONTENT_RANGE_HDR));
+				++LLMeshRepository::sHTTPErrorCount;
+				goto common_exit;
+			}
+			
 			// *TODO: Try to get rid of data copying and add interfaces
 			// that support BufferArray directly.  Introduce a two-phase
 			// handler, optional first that takes a body, fallback second
 			// that requires a temporary allocation and data copy.
-		data = new U8[data_size];
-			body->read(0, (char *) data, data_size);
+			body_offset = mOffset - offset;
+			data = new U8[data_size - body_offset];
+			body->read(body_offset, (char *) data, data_size - body_offset);
 			LLMeshRepository::sBytesReceived += data_size;
 		}
 
-		processData(body, data, data_size);
+		processData(body, body_offset, data, data_size - body_offset);
 
 		delete [] data;
 	}
 
 	// Release handler
+common_exit:
 	gMeshRepo.mThread->mHttpRequestSet.erase(this);
 	delete this;		// Must be last statement
 }
@@ -2739,9 +2773,10 @@ void LLMeshHeaderHandler::processFailure(LLCore::HttpStatus status)
 	{
 		gMeshRepo.mThread->mUnavailableQ.push(LLMeshRepoThread::LODRequest(mMeshParams, i));
 	}
-	}
+}
 
-void LLMeshHeaderHandler::processData(LLCore::BufferArray * body, U8 * data, S32 data_size)
+void LLMeshHeaderHandler::processData(LLCore::BufferArray * /* body */, S32 /* body_offset */,
+									  U8 * data, S32 data_size)
 {
 	LLUUID mesh_id = mMeshParams.getSculptID();
 	bool success = (! MESH_HEADER_PROCESS_FAILED) && gMeshRepo.mThread->headerReceived(mMeshParams, data, data_size);
@@ -2756,12 +2791,12 @@ void LLMeshHeaderHandler::processData(LLCore::BufferArray * body, U8 * data, S32
 		// Can't get the header so none of the LODs will be available
 		LLMutexLock lock(gMeshRepo.mThread->mMutex);
 		for (int i(0); i < 4; ++i)
-	{
+		{
 			gMeshRepo.mThread->mUnavailableQ.push(LLMeshRepoThread::LODRequest(mMeshParams, i));
-	}
 		}
+	}
 	else if (data && data_size > 0)
-		{
+	{
 		// header was successfully retrieved from sim, cache in vfs
 		LLSD header = gMeshRepo.mThread->mMeshHeader[mesh_id];
 
@@ -2774,11 +2809,11 @@ void LLMeshHeaderHandler::processData(LLCore::BufferArray * body, U8 * data, S32
 			S32 lod_bytes = 0;
 
 			for (U32 i = 0; i < LLModel::LOD_PHYSICS; ++i)
-	{
+			{
 				// figure out how many bytes we'll need to reserve in the file
 				const std::string & lod_name = header_lod[i];
 				lod_bytes = llmax(lod_bytes, header[lod_name]["offset"].asInteger()+header[lod_name]["size"].asInteger());
-	}
+			}
 
 			// just in case skin info or decomposition is at the end of the file (which it shouldn't be)
 			lod_bytes = llmax(lod_bytes, header["skin"]["offset"].asInteger() + header["skin"]["size"].asInteger());
@@ -2794,7 +2829,7 @@ void LLMeshHeaderHandler::processData(LLCore::BufferArray * body, U8 * data, S32
 
 			LLVFile file(gVFS, mesh_id, LLAssetType::AT_MESH, LLVFile::WRITE);
 			if (file.getMaxSize() >= bytes || file.setMaxSize(bytes))
-		{
+			{
 				LLMeshRepository::sCacheBytesWritten += data_size;
 				++LLMeshRepository::sCacheWrites;
 
@@ -2805,19 +2840,19 @@ void LLMeshHeaderHandler::processData(LLCore::BufferArray * body, U8 * data, S32
 				memset(block, 0, sizeof(block));
 	
 				while (bytes-file.tell() > sizeof(block))
-	{
+				{
 					file.write(block, sizeof(block));
-	}
+				}
 
 				S32 remaining = bytes-file.tell();
 				if (remaining > 0)
-	{
+				{
 					file.write(block, remaining);
 				}
 			}
 		}
 	}
-	}
+}
 
 LLMeshLODHandler::~LLMeshLODHandler()
 {
@@ -2843,8 +2878,9 @@ void LLMeshLODHandler::processFailure(LLCore::HttpStatus status)
 	gMeshRepo.mThread->mUnavailableQ.push(LLMeshRepoThread::LODRequest(mMeshParams, mLOD));
 }
 
-void LLMeshLODHandler::processData(LLCore::BufferArray * body, U8 * data, S32 data_size)
-	{
+void LLMeshLODHandler::processData(LLCore::BufferArray * /* body */, S32 /* body_offset */,
+								   U8 * data, S32 data_size)
+{
 	if ((! MESH_LOD_PROCESS_FAILED) && gMeshRepo.mThread->lodReceived(mMeshParams, mLOD, data, data_size))
 	{
 		//good fetch from sim, write to VFS for caching
@@ -2860,7 +2896,7 @@ void LLMeshLODHandler::processData(LLCore::BufferArray * body, U8 * data, S32 da
 			LLMeshRepository::sCacheBytesWritten += size;
 			++LLMeshRepository::sCacheWrites;
 		}
-		}
+	}
 	else
 	{
 		LL_WARNS(LOG_MESH) << "Error during mesh LOD processing.  ID:  " << mMeshParams.getSculptID()
@@ -2872,12 +2908,12 @@ void LLMeshLODHandler::processData(LLCore::BufferArray * body, U8 * data, S32 da
 }
 
 LLMeshSkinInfoHandler::~LLMeshSkinInfoHandler()
-	{
-		llassert(mProcessed);
-	}
+{
+	llassert(mProcessed);
+}
 
 void LLMeshSkinInfoHandler::processFailure(LLCore::HttpStatus status)
-	{
+{
 	LL_WARNS(LOG_MESH) << "Error during mesh skin info handling.  ID:  " << mMeshID
 					   << ", Reason:  " << status.toString()
 					   << " (" << status.toTerseString() << ").  Not retrying."
@@ -2885,10 +2921,11 @@ void LLMeshSkinInfoHandler::processFailure(LLCore::HttpStatus status)
 
 	// *TODO:  Mark mesh unavailable on error.  For now, simply leave
 	// request unfulfilled rather than retry forever.
-		}
+}
 
-void LLMeshSkinInfoHandler::processData(LLCore::BufferArray * body, U8 * data, S32 data_size)
-	{
+void LLMeshSkinInfoHandler::processData(LLCore::BufferArray * /* body */, S32 /* body_offset */,
+										U8 * data, S32 data_size)
+{
 	if ((! MESH_SKIN_INFO_PROCESS_FAILED) && gMeshRepo.mThread->skinInfoReceived(mMeshID, data, data_size))
 	{
 		//good fetch from sim, write to VFS for caching
@@ -2916,20 +2953,21 @@ void LLMeshSkinInfoHandler::processData(LLCore::BufferArray * body, U8 * data, S
 
 LLMeshDecompositionHandler::~LLMeshDecompositionHandler()
 {
-		llassert(mProcessed);
+	llassert(mProcessed);
 }
 
 void LLMeshDecompositionHandler::processFailure(LLCore::HttpStatus status)
-	{
+{
 	LL_WARNS(LOG_MESH) << "Error during mesh decomposition handling.  ID:  " << mMeshID
 					   << ", Reason:  " << status.toString()
 					   << " (" << status.toTerseString() << ").  Not retrying."
 					   << LL_ENDL;
 	// *TODO:  Mark mesh unavailable on error.  For now, simply leave
 	// request unfulfilled rather than retry forever.
-	}
+}
 
-void LLMeshDecompositionHandler::processData(LLCore::BufferArray * body, U8 * data, S32 data_size)
+void LLMeshDecompositionHandler::processData(LLCore::BufferArray * /* body */, S32 /* body_offset */,
+											 U8 * data, S32 data_size)
 {
 	if ((! MESH_DECOMP_PROCESS_FAILED) && gMeshRepo.mThread->decompositionReceived(mMeshID, data, data_size))
 	{
@@ -2946,34 +2984,35 @@ void LLMeshDecompositionHandler::processData(LLCore::BufferArray * body, U8 * da
 			file.seek(offset);
 			file.write(data, size);
 		}
-		}
-		else
-		{
+	}
+	else
+	{
 		LL_WARNS(LOG_MESH) << "Error during mesh decomposition processing.  ID:  " << mMeshID
 						   << ", Unknown reason.  Not retrying."
 						   << LL_ENDL;
 		// *TODO:  Mark mesh unavailable on error
-		}
 	}
+}
 
 LLMeshPhysicsShapeHandler::~LLMeshPhysicsShapeHandler()
-	{
-		llassert(mProcessed);
-	}
+{
+	llassert(mProcessed);
+}
 
 void LLMeshPhysicsShapeHandler::processFailure(LLCore::HttpStatus status)
-	{
+{
 	LL_WARNS(LOG_MESH) << "Error during mesh physics shape handling.  ID:  " << mMeshID
 					   << ", Reason:  " << status.toString()
 					   << " (" << status.toTerseString() << ").  Not retrying."
 					   << LL_ENDL;
 	// *TODO:  Mark mesh unavailable on error
-	}
+}
 
-void LLMeshPhysicsShapeHandler::processData(LLCore::BufferArray * body, U8 * data, S32 data_size)
-			{
+void LLMeshPhysicsShapeHandler::processData(LLCore::BufferArray * /* body */, S32 /* body_offset */,
+											U8 * data, S32 data_size)
+{
 	if ((! MESH_PHYS_SHAPE_PROCESS_FAILED) && gMeshRepo.mThread->physicsShapeReceived(mMeshID, data, data_size))
-				{
+	{
 		// good fetch from sim, write to VFS for caching
 		LLVFile file(gVFS, mMeshID, LLAssetType::AT_MESH, LLVFile::WRITE);
 
@@ -2981,13 +3020,13 @@ void LLMeshPhysicsShapeHandler::processData(LLCore::BufferArray * body, U8 * dat
 		S32 size = mRequestedBytes;
 
 		if (file.getSize() >= offset+size)
-				{
+		{
 			LLMeshRepository::sCacheBytesWritten += size;
 			++LLMeshRepository::sCacheWrites;
 			file.seek(offset);
 			file.write(data, size);
-			}
 		}
+	}
 	else
 	{
 		LL_WARNS(LOG_MESH) << "Error during mesh physics shape processing.  ID:  " << mMeshID
@@ -3187,7 +3226,7 @@ void LLMeshRepository::notifyLoadedMeshes()
 	if (1 == mGetMeshVersion)
 	{
 		// Legacy GetMesh operation with high connection concurrency
-	LLMeshRepoThread::sMaxConcurrentRequests = gSavedSettings.getU32("MeshMaxConcurrentRequests");
+		LLMeshRepoThread::sMaxConcurrentRequests = gSavedSettings.getU32("MeshMaxConcurrentRequests");
 		LLMeshRepoThread::sRequestHighWater = llclamp(2 * S32(LLMeshRepoThread::sMaxConcurrentRequests),
 													  REQUEST_HIGH_WATER_MIN,
 													  REQUEST_HIGH_WATER_MAX);
@@ -3198,9 +3237,15 @@ void LLMeshRepository::notifyLoadedMeshes()
 	else
 	{
 		// GetMesh2 operation with keepalives, etc.  With pipelining,
-		// we'll increase this.
+		// we'll increase this.  See llappcorehttp and llcorehttp for
+		// discussion on connection strategies.
+		LLAppCoreHttp & app_core_http(LLAppViewer::instance()->getAppCoreHttp());
+		S32 scale(app_core_http.isPipelined(LLAppCoreHttp::AP_MESH2)
+				  ? (2 * LLAppCoreHttp::PIPELINING_DEPTH)
+				  : 5);
+
 		LLMeshRepoThread::sMaxConcurrentRequests = gSavedSettings.getU32("Mesh2MaxConcurrentRequests");
-		LLMeshRepoThread::sRequestHighWater = llclamp(5 * S32(LLMeshRepoThread::sMaxConcurrentRequests),
+		LLMeshRepoThread::sRequestHighWater = llclamp(scale * S32(LLMeshRepoThread::sMaxConcurrentRequests),
 													  REQUEST2_HIGH_WATER_MIN,
 													  REQUEST2_HIGH_WATER_MAX);
 		LLMeshRepoThread::sRequestLowWater = llclamp(LLMeshRepoThread::sRequestHighWater / 2,
@@ -3300,18 +3345,18 @@ void LLMeshRepository::notifyLoadedMeshes()
 			// If we can't get the locks, skip and pick this up later.
 			++hold_offs;
 			sMaxLockHoldoffs = llmax(sMaxLockHoldoffs, hold_offs);
-		return;
-	}
+			return;
+		}
 		hold_offs = 0;
 
 		if (gAgent.getRegion())
 		{
 			// Update capability urls
-	static std::string region_name("never name a region this");
+			static std::string region_name("never name a region this");
 
-		if (gAgent.getRegion()->getName() != region_name && gAgent.getRegion()->capabilitiesReceived())
-		{
-			region_name = gAgent.getRegion()->getName();
+			if (gAgent.getRegion()->getName() != region_name && gAgent.getRegion()->capabilitiesReceived())
+			{
+				region_name = gAgent.getRegion()->getName();
 				const bool use_v1(gSavedSettings.getBOOL("MeshUseGetMesh1"));
 				const std::string mesh1(gAgent.getRegion()->getCapability("GetMesh"));
 				const std::string mesh2(gAgent.getRegion()->getCapability("GetMesh2"));
@@ -3322,8 +3367,8 @@ void LLMeshRepository::notifyLoadedMeshes()
 									<< ", GetMesh:  " << mesh1
 									<< ", using version:  " << mGetMeshVersion
 									<< LL_ENDL;
+			}
 		}
-	}
 
 		//popup queued error messages from background threads
 		while (!mUploadErrorQ.empty())
@@ -3338,46 +3383,46 @@ void LLMeshRepository::notifyLoadedMeshes()
 			S32 push_count = LLMeshRepoThread::sRequestHighWater - active_count;
 
 			if (mPendingRequests.size() > push_count)
-		{
+			{
 				// More requests than the high-water limit allows so
 				// sort and forward the most important.
 
-			//calculate "score" for pending requests
+				//calculate "score" for pending requests
 
-			//create score map
-			std::map<LLUUID, F32> score_map;
+				//create score map
+				std::map<LLUUID, F32> score_map;
 
-			for (U32 i = 0; i < 4; ++i)
-			{
-				for (mesh_load_map::iterator iter = mLoadingMeshes[i].begin();  iter != mLoadingMeshes[i].end(); ++iter)
+				for (U32 i = 0; i < 4; ++i)
 				{
-					F32 max_score = 0.f;
-					for (std::set<LLUUID>::iterator obj_iter = iter->second.begin(); obj_iter != iter->second.end(); ++obj_iter)
+					for (mesh_load_map::iterator iter = mLoadingMeshes[i].begin();  iter != mLoadingMeshes[i].end(); ++iter)
 					{
-						LLViewerObject* object = gObjectList.findObject(*obj_iter);
-
-						if (object)
+						F32 max_score = 0.f;
+						for (std::set<LLUUID>::iterator obj_iter = iter->second.begin(); obj_iter != iter->second.end(); ++obj_iter)
 						{
-							LLDrawable* drawable = object->mDrawable;
-							if (drawable)
+							LLViewerObject* object = gObjectList.findObject(*obj_iter);
+							
+							if (object)
 							{
-								F32 cur_score = drawable->getRadius()/llmax(drawable->mDistanceWRTCamera, 1.f);
-								max_score = llmax(max_score, cur_score);
+								LLDrawable* drawable = object->mDrawable;
+								if (drawable)
+								{
+									F32 cur_score = drawable->getRadius()/llmax(drawable->mDistanceWRTCamera, 1.f);
+									max_score = llmax(max_score, cur_score);
+								}
 							}
 						}
-					}
 				
-					score_map[iter->first.getSculptID()] = max_score;
+						score_map[iter->first.getSculptID()] = max_score;
+					}
 				}
-			}
 
-			//set "score" for pending requests
-			for (std::vector<LLMeshRepoThread::LODRequest>::iterator iter = mPendingRequests.begin(); iter != mPendingRequests.end(); ++iter)
-			{
-				iter->mScore = score_map[iter->mMeshParams.getSculptID()];
-			}
+				//set "score" for pending requests
+				for (std::vector<LLMeshRepoThread::LODRequest>::iterator iter = mPendingRequests.begin(); iter != mPendingRequests.end(); ++iter)
+				{
+					iter->mScore = score_map[iter->mMeshParams.getSculptID()];
+				}
 
-			//sort by "score"
+				//sort by "score"
 				std::partial_sort(mPendingRequests.begin(), mPendingRequests.begin() + push_count,
 								  mPendingRequests.end(), LLMeshRepoThread::CompareScoreGreater());
 			}
@@ -3588,7 +3633,6 @@ void LLMeshRepository::fetchPhysicsShape(const LLUUID& mesh_id)
 			}
 		}
 	}
-
 }
 
 LLModel::Decomposition* LLMeshRepository::getDecomposition(const LLUUID& mesh_id)