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/*
* Copyright (C) 2010, 2012 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"
#include "LocalFileSystem.h"
#if ENABLE(FILE_SYSTEM)
#include "CrossThreadTask.h"
#include "Document.h"
#include "ErrorCallback.h"
#include "FileSystemCallback.h"
#include "FileSystemCallbacks.h"
#include "FileSystemType.h"
#include "PlatformString.h"
#include "WebFileError.h"
#include "WebFileSystemCallbacksImpl.h"
#include "WebFrameClient.h"
#include "WebFrameImpl.h"
#include "WebPermissionClient.h"
#include "WebViewImpl.h"
#include "WebWorkerBase.h"
#include "WorkerContext.h"
#include "WorkerFileSystemCallbacksBridge.h"
#include "WorkerThread.h"
#include <public/WebFileSystem.h>
#include <wtf/Threading.h>
using namespace WebKit;
namespace WebCore {
LocalFileSystem& LocalFileSystem::localFileSystem()
{
AtomicallyInitializedStatic(LocalFileSystem*, localFileSystem = new LocalFileSystem(""));
return *localFileSystem;
}
namespace {
enum CreationFlag {
OpenExisting,
CreateIfNotPresent
};
#if ENABLE(WORKERS)
static const char allowFileSystemMode[] = "allowFileSystemMode";
static const char openFileSystemMode[] = "openFileSystemMode";
// This class is used to route the result of the WebWorkerBase::allowFileSystem
// call back to the worker context.
class AllowFileSystemMainThreadBridge : public ThreadSafeRefCounted<AllowFileSystemMainThreadBridge> {
public:
static PassRefPtr<AllowFileSystemMainThreadBridge> create(WebCore::WorkerLoaderProxy* workerLoaderProxy, const String& mode, WebCommonWorkerClient* commonClient)
{
return adoptRef(new AllowFileSystemMainThreadBridge(workerLoaderProxy, mode, commonClient));
}
// These methods are invoked on the worker context.
void cancel()
{
MutexLocker locker(m_mutex);
m_workerLoaderProxy = 0;
}
bool result()
{
return m_result;
}
// This method is invoked on the main thread.
void signalCompleted(const String& mode, bool result)
{
MutexLocker locker(m_mutex);
if (!m_workerLoaderProxy)
return;
m_workerLoaderProxy->postTaskForModeToWorkerContext(
createCallbackTask(&didComplete, AllowCrossThreadAccess(this), result), mode);
}
private:
AllowFileSystemMainThreadBridge(WebCore::WorkerLoaderProxy* workerLoaderProxy, const String& mode, WebCommonWorkerClient* commonClient)
: m_result(false)
, m_workerLoaderProxy(workerLoaderProxy)
{
WebWorkerBase::dispatchTaskToMainThread(createCallbackTask(&allowFileSystemTask, mode, AllowCrossThreadAccess(commonClient), this));
}
static void allowFileSystemTask(WebCore::ScriptExecutionContext* context, const String& mode, WebCommonWorkerClient* commonClient, PassRefPtr<AllowFileSystemMainThreadBridge> bridge)
{
bool allowFileSystem = commonClient ? commonClient->allowFileSystem() : false;
bridge->signalCompleted(mode, allowFileSystem);
}
static void didComplete(WebCore::ScriptExecutionContext* context, PassRefPtr<AllowFileSystemMainThreadBridge> bridge, bool result)
{
bridge->m_result = result;
}
bool m_result;
Mutex m_mutex;
WebCore::WorkerLoaderProxy* m_workerLoaderProxy;
};
bool allowFileSystemForWorker(WebCommonWorkerClient* commonClient)
{
WorkerScriptController* controller = WorkerScriptController::controllerForContext();
WorkerContext* workerContext = controller->workerContext();
WebCore::WorkerThread* workerThread = workerContext->thread();
WorkerRunLoop& runLoop = workerThread->runLoop();
WebCore::WorkerLoaderProxy* workerLoaderProxy = &workerThread->workerLoaderProxy();
// Create a unique mode just for this synchronous call.
String mode = allowFileSystemMode;
mode.append(String::number(runLoop.createUniqueId()));
RefPtr<AllowFileSystemMainThreadBridge> bridge = AllowFileSystemMainThreadBridge::create(workerLoaderProxy, mode, commonClient);
// Either the bridge returns, or the queue gets terminated.
if (runLoop.runInMode(workerContext, mode) == MessageQueueTerminated) {
bridge->cancel();
return false;
}
return bridge->result();
}
void openFileSystemForWorker(WebCommonWorkerClient* commonClient, WebFileSystem::Type type, long long size, bool create, WebFileSystemCallbacks* callbacks, FileSystemSynchronousType synchronousType)
{
WorkerScriptController* controller = WorkerScriptController::controllerForContext();
WorkerContext* workerContext = controller->workerContext();
WebCore::WorkerThread* workerThread = workerContext->thread();
WorkerRunLoop& runLoop = workerThread->runLoop();
WebCore::WorkerLoaderProxy* workerLoaderProxy = &workerThread->workerLoaderProxy();
// Create a unique mode for this openFileSystem call.
String mode = openFileSystemMode;
mode.append(String::number(runLoop.createUniqueId()));
RefPtr<WorkerFileSystemCallbacksBridge> bridge = WorkerFileSystemCallbacksBridge::create(workerLoaderProxy, workerContext, callbacks);
bridge->postOpenFileSystemToMainThread(commonClient, type, size, create, mode);
if (synchronousType == SynchronousFileSystem) {
if (runLoop.runInMode(workerContext, mode) == MessageQueueTerminated)
bridge->stop();
}
}
#endif // ENABLE(WORKERS)
} // namespace
static void openFileSystemNotAllowed(ScriptExecutionContext*, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
{
callbacks->didFail(WebKit::WebFileErrorAbort);
}
static void deleteFileSystemNotAllowed(ScriptExecutionContext*, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
{
callbacks->didFail(WebKit::WebFileErrorAbort);
}
static void openFileSystemHelper(ScriptExecutionContext* context, FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, FileSystemSynchronousType synchronousType, long long size, CreationFlag create)
{
bool allowed = true;
ASSERT(context);
if (context->isDocument()) {
Document* document = static_cast<Document*>(context);
WebFrameImpl* webFrame = WebFrameImpl::fromFrame(document->frame());
WebKit::WebViewImpl* webView = webFrame->viewImpl();
if (webView->permissionClient() && !webView->permissionClient()->allowFileSystem(webFrame))
allowed = false;
else
webFrame->client()->openFileSystem(webFrame, static_cast<WebFileSystem::Type>(type), size, create == CreateIfNotPresent, new WebFileSystemCallbacksImpl(callbacks));
} else {
#if ENABLE(WORKERS)
WorkerContext* workerContext = static_cast<WorkerContext*>(context);
WorkerLoaderProxy* workerLoaderProxy = &workerContext->thread()->workerLoaderProxy();
WebWorkerBase* webWorker = static_cast<WebWorkerBase*>(workerLoaderProxy);
if (!allowFileSystemForWorker(webWorker->commonClient()))
allowed = false;
else
openFileSystemForWorker(webWorker->commonClient(), static_cast<WebFileSystem::Type>(type), size, create == CreateIfNotPresent, new WebFileSystemCallbacksImpl(callbacks, context, synchronousType), synchronousType);
#else
ASSERT_NOT_REACHED();
#endif
}
if (!allowed) {
// The tasks are expected to be called asynchronously.
context->postTask(createCallbackTask(&openFileSystemNotAllowed, callbacks));
}
}
void LocalFileSystem::readFileSystem(ScriptExecutionContext* context, FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, FileSystemSynchronousType synchronousType)
{
openFileSystemHelper(context, type, callbacks, synchronousType, 0, OpenExisting);
}
void LocalFileSystem::requestFileSystem(ScriptExecutionContext* context, FileSystemType type, long long size, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, FileSystemSynchronousType synchronousType)
{
openFileSystemHelper(context, type, callbacks, synchronousType, size, CreateIfNotPresent);
}
void LocalFileSystem::deleteFileSystem(ScriptExecutionContext* context, FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
{
ASSERT(context);
ASSERT(context->isDocument());
Document* document = static_cast<Document*>(context);
WebFrameImpl* webFrame = WebFrameImpl::fromFrame(document->frame());
WebKit::WebViewImpl* webView = webFrame->viewImpl();
if (webView->permissionClient() && !webView->permissionClient()->allowFileSystem(webFrame)) {
context->postTask(createCallbackTask(&deleteFileSystemNotAllowed, callbacks));
return;
}
webFrame->client()->deleteFileSystem(webFrame, static_cast<WebFileSystem::Type>(type), new WebFileSystemCallbacksImpl(callbacks));
}
} // namespace WebCore
#endif // ENABLE(FILE_SYSTEM)
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