267 lines
10 KiB
C++
267 lines
10 KiB
C++
/*
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* Copyright (C) 2008-2017 Apple Inc. All rights reserved.
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* Copyright (C) 2009 Google Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "Worker.h"
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#include "ContentSecurityPolicy.h"
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#include "DedicatedWorkerGlobalScope.h"
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#include "ErrorEvent.h"
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#include "Event.h"
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#include "EventNames.h"
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#include "InspectorInstrumentation.h"
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#include "LoaderStrategy.h"
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#include "PlatformStrategies.h"
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#if ENABLE(WEB_RTC)
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#include "RTCRtpScriptTransform.h"
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#include "RTCRtpScriptTransformer.h"
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#endif
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#include "ResourceResponse.h"
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#include "SecurityOrigin.h"
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#include "WorkerGlobalScopeProxy.h"
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#include "WorkerScriptLoader.h"
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#include "WorkerThread.h"
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#include <JavaScriptCore/IdentifiersFactory.h>
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#include <JavaScriptCore/ScriptCallStack.h>
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#include <wtf/HashSet.h>
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/MainThread.h>
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#include <wtf/NeverDestroyed.h>
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#include <wtf/Scope.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(Worker);
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static HashSet<Worker*>& allWorkers()
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{
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static NeverDestroyed<HashSet<Worker*>> set;
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return set;
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}
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void Worker::networkStateChanged(bool isOnLine)
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{
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for (auto* worker : allWorkers())
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worker->notifyNetworkStateChange(isOnLine);
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}
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inline Worker::Worker(ScriptExecutionContext& context, JSC::RuntimeFlags runtimeFlags, const Options& options)
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: ActiveDOMObject(&context)
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, m_name(options.name)
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, m_identifier("worker:" + Inspector::IdentifiersFactory::createIdentifier())
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, m_contextProxy(WorkerGlobalScopeProxy::create(*this))
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, m_runtimeFlags(runtimeFlags)
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, m_type(options.type)
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, m_credentials(options.credentials)
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{
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static bool addedListener;
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if (!addedListener) {
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platformStrategies()->loaderStrategy()->addOnlineStateChangeListener(&networkStateChanged);
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addedListener = true;
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}
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auto addResult = allWorkers().add(this);
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ASSERT_UNUSED(addResult, addResult.isNewEntry);
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}
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ExceptionOr<Ref<Worker>> Worker::create(ScriptExecutionContext& context, JSC::RuntimeFlags runtimeFlags, const String& url, const Options& options)
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{
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ASSERT(isMainThread());
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// We don't currently support nested workers, so workers can only be created from documents.
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ASSERT_WITH_SECURITY_IMPLICATION(context.isDocument());
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auto worker = adoptRef(*new Worker(context, runtimeFlags, options));
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worker->suspendIfNeeded();
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bool shouldBypassMainWorldContentSecurityPolicy = context.shouldBypassMainWorldContentSecurityPolicy();
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auto scriptURL = worker->resolveURL(url, shouldBypassMainWorldContentSecurityPolicy);
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if (scriptURL.hasException())
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return scriptURL.releaseException();
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worker->m_shouldBypassMainWorldContentSecurityPolicy = shouldBypassMainWorldContentSecurityPolicy;
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// https://html.spec.whatwg.org/multipage/workers.html#official-moment-of-creation
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worker->m_workerCreationTime = MonotonicTime::now();
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worker->m_scriptLoader = WorkerScriptLoader::create();
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auto contentSecurityPolicyEnforcement = shouldBypassMainWorldContentSecurityPolicy ? ContentSecurityPolicyEnforcement::DoNotEnforce : ContentSecurityPolicyEnforcement::EnforceChildSrcDirective;
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ResourceRequest request { scriptURL.releaseReturnValue() };
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request.setInitiatorIdentifier(worker->m_identifier);
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FetchOptions fetchOptions;
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fetchOptions.mode = FetchOptions::Mode::SameOrigin;
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if (worker->m_type == WorkerType::Module)
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fetchOptions.credentials = worker->m_credentials;
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else
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fetchOptions.credentials = FetchOptions::Credentials::SameOrigin;
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fetchOptions.cache = FetchOptions::Cache::Default;
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fetchOptions.redirect = FetchOptions::Redirect::Follow;
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fetchOptions.destination = FetchOptions::Destination::Worker;
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worker->m_scriptLoader->loadAsynchronously(context, WTFMove(request), WTFMove(fetchOptions), contentSecurityPolicyEnforcement, ServiceWorkersMode::All, worker.get(), WorkerRunLoop::defaultMode());
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return worker;
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}
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Worker::~Worker()
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{
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ASSERT(isMainThread());
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ASSERT(scriptExecutionContext()); // The context is protected by worker context proxy, so it cannot be destroyed while a Worker exists.
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allWorkers().remove(this);
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m_contextProxy.workerObjectDestroyed();
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}
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ExceptionOr<void> Worker::postMessage(JSC::JSGlobalObject& state, JSC::JSValue messageValue, PostMessageOptions&& options)
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{
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Vector<RefPtr<MessagePort>> ports;
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auto message = SerializedScriptValue::create(state, messageValue, WTFMove(options.transfer), ports, SerializationContext::WorkerPostMessage);
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if (message.hasException())
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return message.releaseException();
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// Disentangle the port in preparation for sending it to the remote context.
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auto channels = MessagePort::disentanglePorts(WTFMove(ports));
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if (channels.hasException())
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return channels.releaseException();
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m_contextProxy.postMessageToWorkerGlobalScope({ message.releaseReturnValue(), channels.releaseReturnValue() });
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return { };
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}
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void Worker::terminate()
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{
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m_contextProxy.terminateWorkerGlobalScope();
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m_wasTerminated = true;
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}
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const char* Worker::activeDOMObjectName() const
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{
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return "Worker";
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}
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void Worker::stop()
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{
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terminate();
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}
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void Worker::suspend(ReasonForSuspension reason)
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{
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if (reason == ReasonForSuspension::BackForwardCache) {
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m_contextProxy.suspendForBackForwardCache();
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m_isSuspendedForBackForwardCache = true;
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}
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}
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void Worker::resume()
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{
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if (m_isSuspendedForBackForwardCache) {
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m_contextProxy.resumeForBackForwardCache();
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m_isSuspendedForBackForwardCache = false;
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}
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}
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bool Worker::virtualHasPendingActivity() const
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{
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return m_contextProxy.hasPendingActivity() || m_scriptLoader;
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}
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void Worker::notifyNetworkStateChange(bool isOnLine)
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{
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m_contextProxy.notifyNetworkStateChange(isOnLine);
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}
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void Worker::didReceiveResponse(unsigned long identifier, const ResourceResponse& response)
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{
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const URL& responseURL = response.url();
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if (!responseURL.protocolIsBlob() && !responseURL.protocolIs("file") && !SecurityOrigin::create(responseURL)->isUnique())
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m_contentSecurityPolicyResponseHeaders = ContentSecurityPolicyResponseHeaders(response);
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InspectorInstrumentation::didReceiveScriptResponse(scriptExecutionContext(), identifier);
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}
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void Worker::notifyFinished()
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{
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auto clearLoader = makeScopeExit([this] {
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m_scriptLoader = nullptr;
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});
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auto* context = scriptExecutionContext();
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if (!context)
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return;
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if (m_scriptLoader->failed()) {
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queueTaskToDispatchEvent(*this, TaskSource::DOMManipulation, Event::create(eventNames().errorEvent, Event::CanBubble::No, Event::IsCancelable::Yes));
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return;
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}
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bool isOnline = platformStrategies()->loaderStrategy()->isOnLine();
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const ContentSecurityPolicyResponseHeaders& contentSecurityPolicyResponseHeaders = m_contentSecurityPolicyResponseHeaders ? m_contentSecurityPolicyResponseHeaders.value() : context->contentSecurityPolicy()->responseHeaders();
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ReferrerPolicy referrerPolicy = ReferrerPolicy::EmptyString;
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if (auto policy = parseReferrerPolicy(m_scriptLoader->referrerPolicy(), ReferrerPolicySource::HTTPHeader))
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referrerPolicy = *policy;
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URL responseURL = m_scriptLoader->responseURL();
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if (!m_scriptLoader->isRedirected() && m_scriptLoader->responseSource() != ResourceResponse::Source::ServiceWorker) {
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if (m_scriptLoader->url().hasFragmentIdentifier())
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responseURL.setFragmentIdentifier(m_scriptLoader->url().fragmentIdentifier());
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}
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m_contextProxy.startWorkerGlobalScope(responseURL, m_name, context->userAgent(responseURL), isOnline, m_scriptLoader->script(), contentSecurityPolicyResponseHeaders, m_shouldBypassMainWorldContentSecurityPolicy, m_scriptLoader->crossOriginEmbedderPolicy(), m_workerCreationTime, referrerPolicy, m_type, m_credentials, m_runtimeFlags);
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InspectorInstrumentation::scriptImported(*context, m_scriptLoader->identifier(), m_scriptLoader->script().toString());
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}
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void Worker::dispatchEvent(Event& event)
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{
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if (m_wasTerminated)
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return;
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AbstractWorker::dispatchEvent(event);
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if (is<ErrorEvent>(event) && !event.defaultPrevented() && event.isTrusted() && scriptExecutionContext()) {
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auto& errorEvent = downcast<ErrorEvent>(event);
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scriptExecutionContext()->reportException(errorEvent.message(), errorEvent.lineno(), errorEvent.colno(), errorEvent.filename(), nullptr, nullptr);
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}
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}
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#if ENABLE(WEB_RTC)
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void Worker::createRTCRtpScriptTransformer(RTCRtpScriptTransform& transform, MessageWithMessagePorts&& options)
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{
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if (!scriptExecutionContext())
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return;
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m_contextProxy.postTaskToWorkerGlobalScope([transform = makeRef(transform), options = WTFMove(options)](auto& context) mutable {
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if (auto transformer = downcast<DedicatedWorkerGlobalScope>(context).createRTCRtpScriptTransformer(WTFMove(options)))
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transform->setTransformer(*transformer);
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});
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}
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void Worker::postTaskToWorkerGlobalScope(Function<void(ScriptExecutionContext&)>&& task)
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{
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m_contextProxy.postTaskToWorkerGlobalScope(WTFMove(task));
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}
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#endif
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} // namespace WebCore
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