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/*
* Copyright (C) 2013 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 "WebEmbeddedWorkerImpl.h"
#include "ServiceWorkerGlobalScopeProxy.h"
#include "WebDataSourceImpl.h"
#include "WebFrameImpl.h"
#include "WebServiceWorkerContextClient.h"
#include "WebView.h"
#include "WebWorkerPermissionClientProxy.h"
#include "WorkerPermissionClient.h"
#include "core/dom/Document.h"
#include "core/loader/FrameLoadRequest.h"
#include "core/loader/SubstituteData.h"
#include "core/workers/WorkerClients.h"
#include "core/workers/WorkerLoaderProxy.h"
#include "core/workers/WorkerScriptLoader.h"
#include "core/workers/WorkerScriptLoaderClient.h"
#include "core/workers/WorkerThreadStartupData.h"
#include "modules/serviceworkers/ServiceWorkerThread.h"
#include "platform/NotImplemented.h"
#include "platform/SharedBuffer.h"
#include "wtf/Functional.h"
using namespace WebCore;
namespace blink {
// A thin wrapper for one-off script loading.
class WebEmbeddedWorkerImpl::Loader : public WorkerScriptLoaderClient {
public:
static PassOwnPtr<Loader> create(ExecutionContext* loadingContext, const KURL& scriptURL, const Closure& callback)
{
return adoptPtr(new Loader(loadingContext, scriptURL, callback));
}
virtual ~Loader()
{
m_scriptLoader->setClient(0);
}
virtual void notifyFinished() OVERRIDE
{
m_callback();
}
void cancel()
{
m_scriptLoader->cancel();
}
bool failed() const { return m_scriptLoader->failed(); }
const KURL& url() const { return m_scriptLoader->responseURL(); }
String script() const { return m_scriptLoader->script(); }
private:
Loader(ExecutionContext* loadingContext, const KURL& scriptURL, const Closure& callback)
: m_scriptLoader(WorkerScriptLoader::create())
, m_callback(callback)
{
m_scriptLoader->setTargetType(ResourceRequest::TargetIsServiceWorker);
m_scriptLoader->loadAsynchronously(
loadingContext, scriptURL, DenyCrossOriginRequests, this);
}
RefPtr<WorkerScriptLoader> m_scriptLoader;
Closure m_callback;
};
class WebEmbeddedWorkerImpl::LoaderProxy : public WorkerLoaderProxy {
public:
static PassOwnPtr<LoaderProxy> create(WebEmbeddedWorkerImpl& embeddedWorker)
{
return adoptPtr(new LoaderProxy(embeddedWorker));
}
virtual void postTaskToLoader(PassOwnPtr<ExecutionContextTask> task) OVERRIDE
{
m_embeddedWorker.m_loadingContext->postTask(task);
}
virtual bool postTaskForModeToWorkerGlobalScope(PassOwnPtr<ExecutionContextTask> task, const String& mode) OVERRIDE
{
if (m_embeddedWorker.m_askedToTerminate || !m_embeddedWorker.m_workerThread)
return false;
return m_embeddedWorker.m_workerThread->runLoop().postTaskForMode(task, mode);
}
private:
explicit LoaderProxy(WebEmbeddedWorkerImpl& embeddedWorker)
: m_embeddedWorker(embeddedWorker)
{
}
// Not owned, embedded worker owns this.
WebEmbeddedWorkerImpl& m_embeddedWorker;
};
WebEmbeddedWorker* WebEmbeddedWorker::create(
WebServiceWorkerContextClient* client,
WebWorkerPermissionClientProxy* permissionClient)
{
return new WebEmbeddedWorkerImpl(adoptPtr(client), adoptPtr(permissionClient));
}
WebEmbeddedWorkerImpl::WebEmbeddedWorkerImpl(
PassOwnPtr<WebServiceWorkerContextClient> client,
PassOwnPtr<WebWorkerPermissionClientProxy> permissionClient)
: m_workerContextClient(client)
, m_permissionClient(permissionClient)
, m_askedToTerminate(false)
{
}
WebEmbeddedWorkerImpl::~WebEmbeddedWorkerImpl()
{
ASSERT(m_webView);
// Detach the client before closing the view to avoid getting called back.
toWebFrameImpl(m_mainFrame)->setClient(0);
m_webView->close();
m_mainFrame->close();
}
void WebEmbeddedWorkerImpl::startWorkerContext(
const WebEmbeddedWorkerStartData& data)
{
ASSERT(!m_askedToTerminate);
ASSERT(!m_mainScriptLoader);
m_workerStartData = data;
prepareShadowPageForLoader();
m_mainScriptLoader = Loader::create(
m_loadingContext.get(),
data.scriptURL,
bind(&WebEmbeddedWorkerImpl::onScriptLoaderFinished, this));
}
void WebEmbeddedWorkerImpl::terminateWorkerContext()
{
if (m_askedToTerminate)
return;
m_askedToTerminate = true;
if (m_mainScriptLoader)
m_mainScriptLoader->cancel();
if (m_workerThread)
m_workerThread->stop();
}
void WebEmbeddedWorkerImpl::prepareShadowPageForLoader()
{
// Create 'shadow page', which is never displayed and is used mainly to
// provide a context for loading on the main thread.
//
// FIXME: This does mostly same as WebSharedWorkerImpl::initializeLoader.
// This code, and probably most of the code in this class should be shared
// with SharedWorker.
ASSERT(!m_webView);
m_webView = WebView::create(0);
m_mainFrame = WebFrame::create(this);
m_webView->setMainFrame(m_mainFrame);
WebFrameImpl* webFrame = toWebFrameImpl(m_webView->mainFrame());
// Construct substitute data source for the 'shadow page'. We only need it
// to have same origin as the worker so the loading checks work correctly.
CString content("");
int length = static_cast<int>(content.length());
RefPtr<SharedBuffer> buffer(SharedBuffer::create(content.data(), length));
webFrame->frame()->loader().load(FrameLoadRequest(0, ResourceRequest(m_workerStartData.scriptURL), SubstituteData(buffer, "text/html", "UTF-8", KURL())));
// This document context will be used as 'loading context' for the worker.
m_loadingContext = webFrame->frame()->document();
}
void WebEmbeddedWorkerImpl::didCreateDataSource(WebFrame*, WebDataSource* ds)
{
// Tell the loader to load the data into the 'shadow page' synchronously,
// so we can grab the resulting Document right after load.
static_cast<WebDataSourceImpl*>(ds)->setDeferMainResourceDataLoad(false);
}
void WebEmbeddedWorkerImpl::onScriptLoaderFinished()
{
ASSERT(m_mainScriptLoader);
if (m_mainScriptLoader->failed() || m_askedToTerminate) {
m_workerContextClient->workerContextFailedToStart();
m_mainScriptLoader.clear();
return;
}
WorkerThreadStartMode startMode =
(m_workerStartData.startMode == WebEmbeddedWorkerStartModePauseOnStart)
? PauseWorkerGlobalScopeOnStart : DontPauseWorkerGlobalScopeOnStart;
OwnPtr<WorkerClients> workerClients = WorkerClients::create();
providePermissionClientToWorker(workerClients.get(), m_permissionClient.release());
OwnPtr<WorkerThreadStartupData> startupData =
WorkerThreadStartupData::create(
m_mainScriptLoader->url(),
m_workerStartData.userAgent,
m_mainScriptLoader->script(),
startMode,
// FIXME: fill appropriate CSP info and policy type.
String(),
ContentSecurityPolicy::Enforce,
workerClients.release());
m_mainScriptLoader.clear();
m_workerGlobalScopeProxy = ServiceWorkerGlobalScopeProxy::create(*this, *m_loadingContext, m_workerContextClient.release());
m_loaderProxy = LoaderProxy::create(*this);
m_workerThread = ServiceWorkerThread::create(*m_loaderProxy, *m_workerGlobalScopeProxy, startupData.release());
m_workerThread->start();
}
} // namespace blink
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