WebCore/loader/WorkerThreadableLoader.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"

 #if ENABLE(WORKERS)

 #include "WorkerThreadableLoader.h"

 #include "GenericWorkerTask.h"
 #include "ResourceError.h"
 #include "ResourceRequest.h"
 #include "ResourceResponse.h"
 #include "ThreadableLoader.h"
 #include "WorkerContext.h"
 #include "WorkerLoaderProxy.h"
 #include "WorkerThread.h"
 #include <memory>
 #include <wtf/OwnPtr.h>
 #include <wtf/Threading.h>
 #include <wtf/Vector.h>

 using namespace std;

 namespace WebCore {

 static const char loadResourceSynchronouslyMode[] = "loadResourceSynchronouslyMode";

 WorkerThreadableLoader::WorkerThreadableLoader(WorkerContext* workerContext, ThreadableLoaderClient* client, const String& taskMode, const ResourceRequest& request, LoadCallbacks callbacksSetting,
                                                ContentSniff contentSniff, StoredCredentials storedCredentials, CrossOriginRedirectPolicy crossOriginRedirectPolicy)
     : m_workerContext(workerContext)
     , m_workerClientWrapper(ThreadableLoaderClientWrapper::create(client))
     , m_bridge(*(new MainThreadBridge(m_workerClientWrapper, m_workerContext->thread()->workerLoaderProxy(), taskMode, request, callbacksSetting, contentSniff, storedCredentials, crossOriginRedirectPolicy)))
 {
 }

 WorkerThreadableLoader::~WorkerThreadableLoader()
 {
     m_bridge.destroy();
 }

 void WorkerThreadableLoader::loadResourceSynchronously(WorkerContext* workerContext, const ResourceRequest& request, ThreadableLoaderClient& client, StoredCredentials storedCredentials, CrossOriginRedirectPolicy crossOriginRedirectPolicy)
 {
     WorkerRunLoop& runLoop = workerContext->thread()->runLoop();

     // Create a unique mode just for this synchronous resource load.
     String mode = loadResourceSynchronouslyMode;
     mode.append(String::number(runLoop.createUniqueId()));

     ContentSniff contentSniff = request.url().isLocalFile() ? SniffContent : DoNotSniffContent;
     RefPtr<WorkerThreadableLoader> loader = WorkerThreadableLoader::create(workerContext, &client, mode, request, DoNotSendLoadCallbacks, contentSniff, storedCredentials, crossOriginRedirectPolicy);

     MessageQueueWaitResult result = MessageQueueMessageReceived;
     while (!loader->done() && result != MessageQueueTerminated)
         result = runLoop.runInMode(workerContext, mode);

     if (!loader->done() && result == MessageQueueTerminated)
         loader->cancel();
 }

 void WorkerThreadableLoader::cancel()
 {
     m_bridge.cancel();
 }

 WorkerThreadableLoader::MainThreadBridge::MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, WorkerLoaderProxy& loaderProxy, const String& taskMode,
                                                            const ResourceRequest& request, LoadCallbacks callbacksSetting, ContentSniff contentSniff, StoredCredentials storedCredentials,
                                                            CrossOriginRedirectPolicy crossOriginRedirectPolicy)
     : m_workerClientWrapper(workerClientWrapper)
     , m_loaderProxy(loaderProxy)
     , m_taskMode(taskMode.copy())
 {
     ASSERT(m_workerClientWrapper.get());
     m_loaderProxy.postTaskToLoader(createCallbackTask(&MainThreadBridge::mainThreadCreateLoader, this, request, callbacksSetting, contentSniff, storedCredentials, crossOriginRedirectPolicy));
 }

 WorkerThreadableLoader::MainThreadBridge::~MainThreadBridge()
 {
 }

 void WorkerThreadableLoader::MainThreadBridge::mainThreadCreateLoader(ScriptExecutionContext* context, MainThreadBridge* thisPtr, auto_ptr<CrossThreadResourceRequestData> requestData, LoadCallbacks callbacksSetting, ContentSniff contentSniff, StoredCredentials storedCredentials, CrossOriginRedirectPolicy crossOriginRedirectPolicy)
 {
     ASSERT(isMainThread());
     ASSERT(context->isDocument());

     // FIXME: the created loader has no knowledge of the origin of the worker doing the load request.
     // Basically every setting done in SubresourceLoader::create (including the contents of addExtraFieldsToRequest)
     // needs to be examined for how it should take into account a different originator.
     OwnPtr<ResourceRequest> request(ResourceRequest::adopt(requestData));
     // FIXME: If the a site requests a local resource, then this will return a non-zero value but the sync path
     // will return a 0 value.  Either this should return 0 or the other code path should do a callback with
     // a failure.
     thisPtr->m_mainThreadLoader = ThreadableLoader::create(context, thisPtr, *request, callbacksSetting, contentSniff, storedCredentials, crossOriginRedirectPolicy);
     ASSERT(thisPtr->m_mainThreadLoader);
 }

 void WorkerThreadableLoader::MainThreadBridge::mainThreadDestroy(ScriptExecutionContext* context, MainThreadBridge* thisPtr)
 {
     ASSERT(isMainThread());
     ASSERT_UNUSED(context, context->isDocument());
     delete thisPtr;
 }

 void WorkerThreadableLoader::MainThreadBridge::destroy()
 {
     // Ensure that no more client callbacks are done in the worker context's thread.
     clearClientWrapper();

     // "delete this" and m_mainThreadLoader::deref() on the worker object's thread.
     m_loaderProxy.postTaskToLoader(createCallbackTask(&MainThreadBridge::mainThreadDestroy, this));
 }

 void WorkerThreadableLoader::MainThreadBridge::mainThreadCancel(ScriptExecutionContext* context, MainThreadBridge* thisPtr)
 {
     ASSERT(isMainThread());
     ASSERT_UNUSED(context, context->isDocument());

     if (!thisPtr->m_mainThreadLoader)
         return;
     thisPtr->m_mainThreadLoader->cancel();
     thisPtr->m_mainThreadLoader = 0;
 }

 void WorkerThreadableLoader::MainThreadBridge::cancel()
 {
     m_loaderProxy.postTaskToLoader(createCallbackTask(&MainThreadBridge::mainThreadCancel, this));
     ThreadableLoaderClientWrapper* clientWrapper = static_cast<ThreadableLoaderClientWrapper*>(m_workerClientWrapper.get());
     if (!clientWrapper->done()) {
         // If the client hasn't reached a termination state, then transition it by sending a cancellation error.
         // Note: no more client callbacks will be done after this method -- the clearClientWrapper() call ensures that.
         ResourceError error(String(), 0, String(), String());
         error.setIsCancellation(true);
         clientWrapper->didFail(error);
     }
     clearClientWrapper();
 }

 void WorkerThreadableLoader::MainThreadBridge::clearClientWrapper()
 {
     static_cast<ThreadableLoaderClientWrapper*>(m_workerClientWrapper.get())->clearClient();
 }

 static void workerContextDidSendData(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
 {
     ASSERT_UNUSED(context, context->isWorkerContext());
     workerClientWrapper->didSendData(bytesSent, totalBytesToBeSent);
 }

 void WorkerThreadableLoader::MainThreadBridge::didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
 {
     m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidSendData, m_workerClientWrapper, bytesSent, totalBytesToBeSent), m_taskMode);
 }

 static void workerContextDidReceiveResponse(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, auto_ptr<CrossThreadResourceResponseData> responseData)
 {
     ASSERT_UNUSED(context, context->isWorkerContext());
     OwnPtr<ResourceResponse> response(ResourceResponse::adopt(responseData));
     workerClientWrapper->didReceiveResponse(*response);
 }

 void WorkerThreadableLoader::MainThreadBridge::didReceiveResponse(const ResourceResponse& response)
 {
     m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveResponse, m_workerClientWrapper, response), m_taskMode);
 }

 static void workerContextDidReceiveData(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, auto_ptr<Vector<char> > vectorData)
 {
     ASSERT_UNUSED(context, context->isWorkerContext());
     workerClientWrapper->didReceiveData(vectorData->data(), vectorData->size());
 }

 void WorkerThreadableLoader::MainThreadBridge::didReceiveData(const char* data, int lengthReceived)
 {
     auto_ptr<Vector<char> > vector(new Vector<char>(lengthReceived)); // needs to be an auto_ptr for usage with createCallbackTask.
     memcpy(vector->data(), data, lengthReceived);
     m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveData, m_workerClientWrapper, vector), m_taskMode);
 }

 static void workerContextDidFinishLoading(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, unsigned long identifier)
 {
     ASSERT_UNUSED(context, context->isWorkerContext());
     workerClientWrapper->didFinishLoading(identifier);
 }

 void WorkerThreadableLoader::MainThreadBridge::didFinishLoading(unsigned long identifier)
 {
     m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFinishLoading, m_workerClientWrapper, identifier), m_taskMode);
 }

 static void workerContextDidFail(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, const ResourceError& error)
 {
     ASSERT_UNUSED(context, context->isWorkerContext());
     workerClientWrapper->didFail(error);
 }

 void WorkerThreadableLoader::MainThreadBridge::didFail(const ResourceError& error)
 {
     m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFail, m_workerClientWrapper, error), m_taskMode);
 }

 static void workerContextDidFailRedirectCheck(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper)
 {
     ASSERT_UNUSED(context, context->isWorkerContext());
     workerClientWrapper->didFailRedirectCheck();
 }

 void WorkerThreadableLoader::MainThreadBridge::didFailRedirectCheck()
 {
     m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFailRedirectCheck, m_workerClientWrapper), m_taskMode);
 }

 static void workerContextDidReceiveAuthenticationCancellation(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, auto_ptr<CrossThreadResourceResponseData> responseData)
 {
     ASSERT_UNUSED(context, context->isWorkerContext());
     OwnPtr<ResourceResponse> response(ResourceResponse::adopt(responseData));
     workerClientWrapper->didReceiveAuthenticationCancellation(*response);
 }

 void WorkerThreadableLoader::MainThreadBridge::didReceiveAuthenticationCancellation(const ResourceResponse& response)
 {
     m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveAuthenticationCancellation, m_workerClientWrapper, response), m_taskMode);
 }

 } // namespace WebCore

 #endif // ENABLE(WORKERS)
	/*
	* Copyright (C) 2009 Google Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following disclaimer
	* in the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"

	#if ENABLE(WORKERS)

	#include "WorkerThreadableLoader.h"

	#include "GenericWorkerTask.h"
	#include "ResourceError.h"
	#include "ResourceRequest.h"
	#include "ResourceResponse.h"
	#include "ThreadableLoader.h"
	#include "WorkerContext.h"
	#include "WorkerLoaderProxy.h"
	#include "WorkerThread.h"
	#include <memory>
	#include <wtf/OwnPtr.h>
	#include <wtf/Threading.h>
	#include <wtf/Vector.h>

	using namespace std;

	namespace WebCore {

	static const char loadResourceSynchronouslyMode[] = "loadResourceSynchronouslyMode";

	WorkerThreadableLoader::WorkerThreadableLoader(WorkerContext* workerContext, ThreadableLoaderClient* client, const String& taskMode, const ResourceRequest& request, LoadCallbacks callbacksSetting,
	ContentSniff contentSniff, StoredCredentials storedCredentials, CrossOriginRedirectPolicy crossOriginRedirectPolicy)
	: m_workerContext(workerContext)
	, m_workerClientWrapper(ThreadableLoaderClientWrapper::create(client))
	, m_bridge(*(new MainThreadBridge(m_workerClientWrapper, m_workerContext->thread()->workerLoaderProxy(), taskMode, request, callbacksSetting, contentSniff, storedCredentials, crossOriginRedirectPolicy)))
	{
	}

	WorkerThreadableLoader::~WorkerThreadableLoader()
	{
	m_bridge.destroy();
	}

	void WorkerThreadableLoader::loadResourceSynchronously(WorkerContext* workerContext, const ResourceRequest& request, ThreadableLoaderClient& client, StoredCredentials storedCredentials, CrossOriginRedirectPolicy crossOriginRedirectPolicy)
	{
	WorkerRunLoop& runLoop = workerContext->thread()->runLoop();

	// Create a unique mode just for this synchronous resource load.
	String mode = loadResourceSynchronouslyMode;
	mode.append(String::number(runLoop.createUniqueId()));

	ContentSniff contentSniff = request.url().isLocalFile() ? SniffContent : DoNotSniffContent;
	RefPtr<WorkerThreadableLoader> loader = WorkerThreadableLoader::create(workerContext, &client, mode, request, DoNotSendLoadCallbacks, contentSniff, storedCredentials, crossOriginRedirectPolicy);

	MessageQueueWaitResult result = MessageQueueMessageReceived;
	while (!loader->done() && result != MessageQueueTerminated)
	result = runLoop.runInMode(workerContext, mode);

	if (!loader->done() && result == MessageQueueTerminated)
	loader->cancel();
	}

	void WorkerThreadableLoader::cancel()
	{
	m_bridge.cancel();
	}

	WorkerThreadableLoader::MainThreadBridge::MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, WorkerLoaderProxy& loaderProxy, const String& taskMode,
	const ResourceRequest& request, LoadCallbacks callbacksSetting, ContentSniff contentSniff, StoredCredentials storedCredentials,
	CrossOriginRedirectPolicy crossOriginRedirectPolicy)
	: m_workerClientWrapper(workerClientWrapper)
	, m_loaderProxy(loaderProxy)
	, m_taskMode(taskMode.copy())
	{
	ASSERT(m_workerClientWrapper.get());
	m_loaderProxy.postTaskToLoader(createCallbackTask(&MainThreadBridge::mainThreadCreateLoader, this, request, callbacksSetting, contentSniff, storedCredentials, crossOriginRedirectPolicy));
	}

	WorkerThreadableLoader::MainThreadBridge::~MainThreadBridge()
	{
	}

	void WorkerThreadableLoader::MainThreadBridge::mainThreadCreateLoader(ScriptExecutionContext* context, MainThreadBridge* thisPtr, auto_ptr<CrossThreadResourceRequestData> requestData, LoadCallbacks callbacksSetting, ContentSniff contentSniff, StoredCredentials storedCredentials, CrossOriginRedirectPolicy crossOriginRedirectPolicy)
	{
	ASSERT(isMainThread());
	ASSERT(context->isDocument());

	// FIXME: the created loader has no knowledge of the origin of the worker doing the load request.
	// Basically every setting done in SubresourceLoader::create (including the contents of addExtraFieldsToRequest)
	// needs to be examined for how it should take into account a different originator.
	OwnPtr<ResourceRequest> request(ResourceRequest::adopt(requestData));
	// FIXME: If the a site requests a local resource, then this will return a non-zero value but the sync path
	// will return a 0 value. Either this should return 0 or the other code path should do a callback with
	// a failure.
	thisPtr->m_mainThreadLoader = ThreadableLoader::create(context, thisPtr, *request, callbacksSetting, contentSniff, storedCredentials, crossOriginRedirectPolicy);
	ASSERT(thisPtr->m_mainThreadLoader);
	}

	void WorkerThreadableLoader::MainThreadBridge::mainThreadDestroy(ScriptExecutionContext* context, MainThreadBridge* thisPtr)
	{
	ASSERT(isMainThread());
	ASSERT_UNUSED(context, context->isDocument());
	delete thisPtr;
	}

	void WorkerThreadableLoader::MainThreadBridge::destroy()
	{
	// Ensure that no more client callbacks are done in the worker context's thread.
	clearClientWrapper();

	// "delete this" and m_mainThreadLoader::deref() on the worker object's thread.
	m_loaderProxy.postTaskToLoader(createCallbackTask(&MainThreadBridge::mainThreadDestroy, this));
	}

	void WorkerThreadableLoader::MainThreadBridge::mainThreadCancel(ScriptExecutionContext* context, MainThreadBridge* thisPtr)
	{
	ASSERT(isMainThread());
	ASSERT_UNUSED(context, context->isDocument());

	if (!thisPtr->m_mainThreadLoader)
	return;
	thisPtr->m_mainThreadLoader->cancel();
	thisPtr->m_mainThreadLoader = 0;
	}

	void WorkerThreadableLoader::MainThreadBridge::cancel()
	{
	m_loaderProxy.postTaskToLoader(createCallbackTask(&MainThreadBridge::mainThreadCancel, this));
	ThreadableLoaderClientWrapper* clientWrapper = static_cast<ThreadableLoaderClientWrapper*>(m_workerClientWrapper.get());
	if (!clientWrapper->done()) {
	// If the client hasn't reached a termination state, then transition it by sending a cancellation error.
	// Note: no more client callbacks will be done after this method -- the clearClientWrapper() call ensures that.
	ResourceError error(String(), 0, String(), String());
	error.setIsCancellation(true);
	clientWrapper->didFail(error);
	}
	clearClientWrapper();
	}

	void WorkerThreadableLoader::MainThreadBridge::clearClientWrapper()
	{
	static_cast<ThreadableLoaderClientWrapper*>(m_workerClientWrapper.get())->clearClient();
	}

	static void workerContextDidSendData(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
	{
	ASSERT_UNUSED(context, context->isWorkerContext());
	workerClientWrapper->didSendData(bytesSent, totalBytesToBeSent);
	}

	void WorkerThreadableLoader::MainThreadBridge::didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
	{
	m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidSendData, m_workerClientWrapper, bytesSent, totalBytesToBeSent), m_taskMode);
	}

	static void workerContextDidReceiveResponse(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, auto_ptr<CrossThreadResourceResponseData> responseData)
	{
	ASSERT_UNUSED(context, context->isWorkerContext());
	OwnPtr<ResourceResponse> response(ResourceResponse::adopt(responseData));
	workerClientWrapper->didReceiveResponse(*response);
	}

	void WorkerThreadableLoader::MainThreadBridge::didReceiveResponse(const ResourceResponse& response)
	{
	m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveResponse, m_workerClientWrapper, response), m_taskMode);
	}

	static void workerContextDidReceiveData(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, auto_ptr<Vector<char> > vectorData)
	{
	ASSERT_UNUSED(context, context->isWorkerContext());
	workerClientWrapper->didReceiveData(vectorData->data(), vectorData->size());
	}

	void WorkerThreadableLoader::MainThreadBridge::didReceiveData(const char* data, int lengthReceived)
	{
	auto_ptr<Vector<char> > vector(new Vector<char>(lengthReceived)); // needs to be an auto_ptr for usage with createCallbackTask.
	memcpy(vector->data(), data, lengthReceived);
	m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveData, m_workerClientWrapper, vector), m_taskMode);
	}

	static void workerContextDidFinishLoading(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, unsigned long identifier)
	{
	ASSERT_UNUSED(context, context->isWorkerContext());
	workerClientWrapper->didFinishLoading(identifier);
	}

	void WorkerThreadableLoader::MainThreadBridge::didFinishLoading(unsigned long identifier)
	{
	m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFinishLoading, m_workerClientWrapper, identifier), m_taskMode);
	}

	static void workerContextDidFail(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, const ResourceError& error)
	{
	ASSERT_UNUSED(context, context->isWorkerContext());
	workerClientWrapper->didFail(error);
	}

	void WorkerThreadableLoader::MainThreadBridge::didFail(const ResourceError& error)
	{
	m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFail, m_workerClientWrapper, error), m_taskMode);
	}

	static void workerContextDidFailRedirectCheck(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper)
	{
	ASSERT_UNUSED(context, context->isWorkerContext());
	workerClientWrapper->didFailRedirectCheck();
	}

	void WorkerThreadableLoader::MainThreadBridge::didFailRedirectCheck()
	{
	m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFailRedirectCheck, m_workerClientWrapper), m_taskMode);
	}

	static void workerContextDidReceiveAuthenticationCancellation(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, auto_ptr<CrossThreadResourceResponseData> responseData)
	{
	ASSERT_UNUSED(context, context->isWorkerContext());
	OwnPtr<ResourceResponse> response(ResourceResponse::adopt(responseData));
	workerClientWrapper->didReceiveAuthenticationCancellation(*response);
	}

	void WorkerThreadableLoader::MainThreadBridge::didReceiveAuthenticationCancellation(const ResourceResponse& response)
	{
	m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveAuthenticationCancellation, m_workerClientWrapper, response), m_taskMode);
	}

	} // namespace WebCore

	#endif // ENABLE(WORKERS)