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/*
* Copyright (C) 2011 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:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "IDBFactoryBackendProxy.h"
#if ENABLE(INDEXED_DATABASE)
#include "CrossThreadTask.h"
#include "DOMStringList.h"
#include "IDBDatabaseBackendProxy.h"
#include "IDBDatabaseCallbacks.h"
#include "IDBDatabaseError.h"
#include "ScriptExecutionContext.h"
#include "SecurityOrigin.h"
#include "WebFrameImpl.h"
#include "WebIDBCallbacksImpl.h"
#include "WebIDBDatabase.h"
#include "WebIDBDatabaseCallbacksImpl.h"
#include "WebIDBDatabaseError.h"
#include "WebIDBFactory.h"
#include "WebKit.h"
#include "WebPermissionClient.h"
#include "WebViewImpl.h"
#include "WebWorkerBase.h"
#include "WebWorkerClientImpl.h"
#include "WorkerContext.h"
#include "WorkerLoaderProxy.h"
#include "WorkerScriptController.h"
#include "WorkerThread.h"
#include "platform/WebKitPlatformSupport.h"
#include <public/WebVector.h>
using namespace WebCore;
namespace WebKit {
PassRefPtr<IDBFactoryBackendInterface> IDBFactoryBackendProxy::create()
{
return adoptRef(new IDBFactoryBackendProxy());
}
IDBFactoryBackendProxy::IDBFactoryBackendProxy()
: m_webIDBFactory(webKitPlatformSupport()->idbFactory())
{
}
IDBFactoryBackendProxy::~IDBFactoryBackendProxy()
{
}
static const char allowIndexedDBMode[] = "allowIndexedDBMode";
class AllowIndexedDBMainThreadBridge : public ThreadSafeRefCounted<AllowIndexedDBMainThreadBridge> {
public:
static PassRefPtr<AllowIndexedDBMainThreadBridge> create(WebWorkerBase* webWorkerBase, const String& mode, const String& name)
{
return adoptRef(new AllowIndexedDBMainThreadBridge(webWorkerBase, mode, name));
}
// These methods are invoked on the worker context.
void cancel()
{
MutexLocker locker(m_mutex);
m_webWorkerBase = 0;
}
bool result()
{
return m_result;
}
// This method is invoked on the main thread.
void signalCompleted(bool result, const String& mode)
{
MutexLocker locker(m_mutex);
if (m_webWorkerBase)
m_webWorkerBase->postTaskForModeToWorkerContext(createCallbackTask(&didComplete, this, result), mode);
}
private:
AllowIndexedDBMainThreadBridge(WebWorkerBase* webWorkerBase, const String& mode, const String& name)
: m_result(false)
, m_webWorkerBase(webWorkerBase)
{
WebCommonWorkerClient* commonClient = webWorkerBase->commonClient();
// See note about thread-safety below.
WebWorkerBase::dispatchTaskToMainThread(
createCallbackTask(&allowIndexedDBTask, this, WebCore::AllowCrossThreadAccess(commonClient), name, mode));
}
static void allowIndexedDBTask(ScriptExecutionContext*, PassRefPtr<AllowIndexedDBMainThreadBridge> bridge, WebCommonWorkerClient* commonClient, const String& name, const String& mode)
{
if (!commonClient) {
bridge->signalCompleted(false, mode);
return;
}
bool allowed = commonClient->allowIndexedDB(name);
bridge->signalCompleted(allowed, mode);
}
static void didComplete(ScriptExecutionContext* context, PassRefPtr<AllowIndexedDBMainThreadBridge> bridge, bool result)
{
bridge->m_result = result;
}
bool m_result;
Mutex m_mutex;
// AllowIndexedDBMainThreadBridge uses two non-threadsafe classes across
// threads: WebWorkerBase and WebCommonWorkerClient.
// In the dedicated worker case, these are both the same object of type
// WebWorkerClientImpl, which isn't deleted for the life of the renderer
// process so we don't have to worry about use-after-frees.
// In the shared worker case, these are of type WebSharedWorkerImpl and
// chromium's WebSharedWorkerClientProxy, respectively. These are both
// deleted on the main thread in response to a request on the worker thread,
// but only after the worker run loop stops processing tasks. So even in
// the most interleaved case, we have:
// W AllowIndexedDBMainThreadBridge schedules allowIndexedDBTask
// M workerRunLoop marked as killed
// W runLoop stops and schedules object deletion on main thread
// M allowIndexedDBTask calls commonClient->allowIndexedDB()
// M WebWorkerBase and WebCommonWorkerClient are deleted
WebWorkerBase* m_webWorkerBase;
};
bool IDBFactoryBackendProxy::allowIndexedDB(ScriptExecutionContext* context, const String& name, const WebSecurityOrigin& origin, PassRefPtr<IDBCallbacks> callbacks)
{
bool allowed;
ASSERT(context->isDocument() || context->isWorkerContext());
if (context->isDocument()) {
Document* document = static_cast<Document*>(context);
WebFrameImpl* webFrame = WebFrameImpl::fromFrame(document->frame());
WebViewImpl* webView = webFrame->viewImpl();
// FIXME: webView->permissionClient() returns 0 in test_shell and content_shell http://crbug.com/137269
allowed = !webView->permissionClient() || webView->permissionClient()->allowIndexedDB(webFrame, name, origin);
} else {
WorkerContext* workerContext = static_cast<WorkerContext*>(context);
WebWorkerBase* webWorkerBase = static_cast<WebWorkerBase*>(&workerContext->thread()->workerLoaderProxy());
WorkerRunLoop& runLoop = workerContext->thread()->runLoop();
String mode = allowIndexedDBMode;
mode.append(String::number(runLoop.createUniqueId()));
RefPtr<AllowIndexedDBMainThreadBridge> bridge = AllowIndexedDBMainThreadBridge::create(webWorkerBase, mode, name);
// Either the bridge returns, or the queue gets terminated.
if (runLoop.runInMode(workerContext, mode) == MessageQueueTerminated) {
bridge->cancel();
allowed = false;
} else
allowed = bridge->result();
}
if (!allowed)
callbacks->onError(WebIDBDatabaseError(IDBDatabaseException::UNKNOWN_ERR, "The user denied permission to access the database."));
return allowed;
}
static WebFrameImpl* getWebFrame(ScriptExecutionContext* context)
{
ASSERT(context->isDocument() || context->isWorkerContext());
if (context->isDocument()) {
Document* document = static_cast<Document*>(context);
return WebFrameImpl::fromFrame(document->frame());
}
return 0;
}
void IDBFactoryBackendProxy::getDatabaseNames(PassRefPtr<IDBCallbacks> prpCallbacks, PassRefPtr<SecurityOrigin> securityOrigin, ScriptExecutionContext* context, const String& dataDir)
{
RefPtr<IDBCallbacks> callbacks(prpCallbacks);
WebSecurityOrigin origin(securityOrigin);
if (!allowIndexedDB(context, "Database Listing", origin, callbacks))
return;
WebFrameImpl* webFrame = getWebFrame(context);
m_webIDBFactory->getDatabaseNames(new WebIDBCallbacksImpl(callbacks), origin, webFrame, dataDir);
}
void IDBFactoryBackendProxy::open(const String& name, int64_t version, PassRefPtr<IDBCallbacks> prpCallbacks, PassRefPtr<IDBDatabaseCallbacks> prpDatabaseCallbacks, PassRefPtr<SecurityOrigin> securityOrigin, ScriptExecutionContext* context, const String& dataDir)
{
RefPtr<IDBCallbacks> callbacks(prpCallbacks);
RefPtr<IDBDatabaseCallbacks> databaseCallbacks(prpDatabaseCallbacks);
WebSecurityOrigin origin(securityOrigin);
if (!allowIndexedDB(context, name, origin, callbacks))
return;
WebFrameImpl* webFrame = getWebFrame(context);
m_webIDBFactory->open(name, version, new WebIDBCallbacksImpl(callbacks), new WebIDBDatabaseCallbacksImpl(databaseCallbacks), origin, webFrame, dataDir);
}
void IDBFactoryBackendProxy::deleteDatabase(const String& name, PassRefPtr<IDBCallbacks> prpCallbacks, PassRefPtr<SecurityOrigin> securityOrigin, ScriptExecutionContext* context, const String& dataDir)
{
RefPtr<IDBCallbacks> callbacks(prpCallbacks);
WebSecurityOrigin origin(securityOrigin);
if (!allowIndexedDB(context, name, origin, callbacks))
return;
WebFrameImpl* webFrame = getWebFrame(context);
m_webIDBFactory->deleteDatabase(name, new WebIDBCallbacksImpl(callbacks), origin, webFrame, dataDir);
}
} // namespace WebKit
#endif // ENABLE(INDEXED_DATABASE)
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