1/*
2 * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32
33#if ENABLE(WORKERS)
34
35#include "WorkerThreadableLoader.h"
36
37#include "Document.h"
38#include "DocumentThreadableLoader.h"
39#include "CrossThreadTask.h"
40#include "ResourceError.h"
41#include "ResourceRequest.h"
42#include "ResourceResponse.h"
43#include "SecurityOrigin.h"
44#include "ThreadableLoader.h"
45#include "WorkerContext.h"
46#include "WorkerLoaderProxy.h"
47#include "WorkerThread.h"
48#include <wtf/MainThread.h>
49#include <wtf/OwnPtr.h>
50#include <wtf/Vector.h>
51
52using namespace std;
53
54namespace WebCore {
55
56static const char loadResourceSynchronouslyMode[] = "loadResourceSynchronouslyMode";
57
58WorkerThreadableLoader::WorkerThreadableLoader(WorkerContext* workerContext, ThreadableLoaderClient* client, const String& taskMode, const ResourceRequest& request, const ThreadableLoaderOptions& options)
59    : m_workerContext(workerContext)
60    , m_workerClientWrapper(ThreadableLoaderClientWrapper::create(client))
61    , m_bridge(*(new MainThreadBridge(m_workerClientWrapper, m_workerContext->thread()->workerLoaderProxy(), taskMode, request, options, workerContext->url().strippedForUseAsReferrer())))
62{
63}
64
65WorkerThreadableLoader::~WorkerThreadableLoader()
66{
67    m_bridge.destroy();
68}
69
70void WorkerThreadableLoader::loadResourceSynchronously(WorkerContext* workerContext, const ResourceRequest& request, ThreadableLoaderClient& client, const ThreadableLoaderOptions& options)
71{
72    WorkerRunLoop& runLoop = workerContext->thread()->runLoop();
73
74    // Create a unique mode just for this synchronous resource load.
75    String mode = loadResourceSynchronouslyMode;
76    mode.append(String::number(runLoop.createUniqueId()));
77
78    RefPtr<WorkerThreadableLoader> loader = WorkerThreadableLoader::create(workerContext, &client, mode, request, options);
79    MessageQueueWaitResult result = MessageQueueMessageReceived;
80    while (!loader->done() && result != MessageQueueTerminated)
81        result = runLoop.runInMode(workerContext, mode);
82
83    if (!loader->done() && result == MessageQueueTerminated)
84        loader->cancel();
85}
86
87void WorkerThreadableLoader::cancel()
88{
89    m_bridge.cancel();
90}
91
92WorkerThreadableLoader::MainThreadBridge::MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, WorkerLoaderProxy& loaderProxy, const String& taskMode,
93                                                           const ResourceRequest& request, const ThreadableLoaderOptions& options, const String& outgoingReferrer)
94    : m_workerClientWrapper(workerClientWrapper)
95    , m_loaderProxy(loaderProxy)
96    , m_taskMode(taskMode.isolatedCopy())
97{
98    ASSERT(m_workerClientWrapper.get());
99    m_loaderProxy.postTaskToLoader(
100        createCallbackTask(&MainThreadBridge::mainThreadCreateLoader,
101                           AllowCrossThreadAccess(this), request, options, outgoingReferrer));
102}
103
104WorkerThreadableLoader::MainThreadBridge::~MainThreadBridge()
105{
106}
107
108void WorkerThreadableLoader::MainThreadBridge::mainThreadCreateLoader(ScriptExecutionContext* context, MainThreadBridge* thisPtr, PassOwnPtr<CrossThreadResourceRequestData> requestData, ThreadableLoaderOptions options, const String& outgoingReferrer)
109{
110    ASSERT(isMainThread());
111    Document* document = toDocument(context);
112
113    OwnPtr<ResourceRequest> request(ResourceRequest::adopt(requestData));
114    request->setHTTPReferrer(outgoingReferrer);
115    // FIXME: If the a site requests a local resource, then this will return a non-zero value but the sync path
116    // will return a 0 value.  Either this should return 0 or the other code path should do a callback with
117    // a failure.
118    thisPtr->m_mainThreadLoader = DocumentThreadableLoader::create(document, thisPtr, *request, options);
119    ASSERT(thisPtr->m_mainThreadLoader);
120}
121
122void WorkerThreadableLoader::MainThreadBridge::mainThreadDestroy(ScriptExecutionContext* context, MainThreadBridge* thisPtr)
123{
124    ASSERT(isMainThread());
125    ASSERT_UNUSED(context, context->isDocument());
126    delete thisPtr;
127}
128
129void WorkerThreadableLoader::MainThreadBridge::destroy()
130{
131    // Ensure that no more client callbacks are done in the worker context's thread.
132    clearClientWrapper();
133
134    // "delete this" and m_mainThreadLoader::deref() on the worker object's thread.
135    m_loaderProxy.postTaskToLoader(
136        createCallbackTask(&MainThreadBridge::mainThreadDestroy, AllowCrossThreadAccess(this)));
137}
138
139void WorkerThreadableLoader::MainThreadBridge::mainThreadCancel(ScriptExecutionContext* context, MainThreadBridge* thisPtr)
140{
141    ASSERT(isMainThread());
142    ASSERT_UNUSED(context, context->isDocument());
143
144    if (!thisPtr->m_mainThreadLoader)
145        return;
146    thisPtr->m_mainThreadLoader->cancel();
147    thisPtr->m_mainThreadLoader = 0;
148}
149
150void WorkerThreadableLoader::MainThreadBridge::cancel()
151{
152    m_loaderProxy.postTaskToLoader(
153        createCallbackTask(&MainThreadBridge::mainThreadCancel, AllowCrossThreadAccess(this)));
154    ThreadableLoaderClientWrapper* clientWrapper = m_workerClientWrapper.get();
155    if (!clientWrapper->done()) {
156        // If the client hasn't reached a termination state, then transition it by sending a cancellation error.
157        // Note: no more client callbacks will be done after this method -- the clearClientWrapper() call ensures that.
158        ResourceError error(String(), 0, String(), String());
159        error.setIsCancellation(true);
160        clientWrapper->didFail(error);
161    }
162    clearClientWrapper();
163}
164
165void WorkerThreadableLoader::MainThreadBridge::clearClientWrapper()
166{
167    m_workerClientWrapper->clearClient();
168}
169
170static void workerContextDidSendData(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
171{
172    ASSERT_UNUSED(context, context->isWorkerContext());
173    workerClientWrapper->didSendData(bytesSent, totalBytesToBeSent);
174}
175
176void WorkerThreadableLoader::MainThreadBridge::didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
177{
178    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidSendData, m_workerClientWrapper, bytesSent, totalBytesToBeSent), m_taskMode);
179}
180
181static void workerContextDidReceiveResponse(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, unsigned long identifier, PassOwnPtr<CrossThreadResourceResponseData> responseData)
182{
183    ASSERT_UNUSED(context, context->isWorkerContext());
184    OwnPtr<ResourceResponse> response(ResourceResponse::adopt(responseData));
185    workerClientWrapper->didReceiveResponse(identifier, *response);
186}
187
188void WorkerThreadableLoader::MainThreadBridge::didReceiveResponse(unsigned long identifier, const ResourceResponse& response)
189{
190    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveResponse, m_workerClientWrapper, identifier, response), m_taskMode);
191}
192
193static void workerContextDidReceiveData(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, PassOwnPtr<Vector<char> > vectorData)
194{
195    ASSERT_UNUSED(context, context->isWorkerContext());
196    workerClientWrapper->didReceiveData(vectorData->data(), vectorData->size());
197}
198
199void WorkerThreadableLoader::MainThreadBridge::didReceiveData(const char* data, int dataLength)
200{
201    OwnPtr<Vector<char> > vector = adoptPtr(new Vector<char>(dataLength)); // needs to be an OwnPtr for usage with createCallbackTask.
202    memcpy(vector->data(), data, dataLength);
203    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidReceiveData, m_workerClientWrapper, vector.release()), m_taskMode);
204}
205
206static void workerContextDidFinishLoading(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, unsigned long identifier, double finishTime)
207{
208    ASSERT_UNUSED(context, context->isWorkerContext());
209    workerClientWrapper->didFinishLoading(identifier, finishTime);
210}
211
212void WorkerThreadableLoader::MainThreadBridge::didFinishLoading(unsigned long identifier, double finishTime)
213{
214    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFinishLoading, m_workerClientWrapper, identifier, finishTime), m_taskMode);
215}
216
217static void workerContextDidFail(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, const ResourceError& error)
218{
219    ASSERT_UNUSED(context, context->isWorkerContext());
220    workerClientWrapper->didFail(error);
221}
222
223void WorkerThreadableLoader::MainThreadBridge::didFail(const ResourceError& error)
224{
225    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFail, m_workerClientWrapper, error), m_taskMode);
226}
227
228static void workerContextDidFailAccessControlCheck(ScriptExecutionContext* context, PassRefPtr<ThreadableLoaderClientWrapper> workerClientWrapper, const ResourceError& error)
229{
230    ASSERT_UNUSED(context, context->isWorkerContext());
231    workerClientWrapper->didFailAccessControlCheck(error);
232}
233
234void WorkerThreadableLoader::MainThreadBridge::didFailAccessControlCheck(const ResourceError& error)
235{
236    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFailAccessControlCheck, m_workerClientWrapper, error), m_taskMode);
237}
238
239static void workerContextDidFailRedirectCheck(ScriptExecutionContext* context, RefPtr<ThreadableLoaderClientWrapper> workerClientWrapper)
240{
241    ASSERT_UNUSED(context, context->isWorkerContext());
242    workerClientWrapper->didFailRedirectCheck();
243}
244
245void WorkerThreadableLoader::MainThreadBridge::didFailRedirectCheck()
246{
247    m_loaderProxy.postTaskForModeToWorkerContext(createCallbackTask(&workerContextDidFailRedirectCheck, m_workerClientWrapper), m_taskMode);
248}
249
250} // namespace WebCore
251
252#endif // ENABLE(WORKERS)
253