src/third_party/WebKit/Source/core/workers/SharedWorker.cpp

   1 /*
   2  * Copyright (C) 2009 Google Inc. All rights reserved.
   3  * Copyright (C) 2010 Apple Inc. All rights reserved.
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  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
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  31
  32 #include "config.h"
  33 #include "core/workers/SharedWorker.h"
  34
  35 #include "bindings/v8/ExceptionState.h"
  36 #include "core/dom/ExceptionCode.h"
  37 #include "core/dom/ExecutionContext.h"
  38 #include "core/dom/MessageChannel.h"
  39 #include "core/dom/MessagePort.h"
  40 #include "core/frame/LocalFrame.h"
  41 #include "core/frame/UseCounter.h"
  42 #include "core/inspector/InspectorInstrumentation.h"
  43 #include "core/loader/FrameLoader.h"
  44 #include "core/loader/FrameLoaderClient.h"
  45 #include "core/workers/SharedWorkerRepositoryClient.h"
  46 #include "platform/weborigin/KURL.h"
  47 #include "platform/weborigin/SecurityOrigin.h"
  48
  49 namespace WebCore {
  50
  51 inline SharedWorker::SharedWorker(ExecutionContext* context)
  52     : AbstractWorker(context)
  53 {
  54     ScriptWrappable::init(this);
  55 }
  56
  57 PassRefPtrWillBeRawPtr<SharedWorker> SharedWorker::create(ExecutionContext* context, const String& url, const String& name, ExceptionState& exceptionState)
  58 {
  59     ASSERT(isMainThread());
  60     ASSERT_WITH_SECURITY_IMPLICATION(context->isDocument());
  61
  62     UseCounter::count(context, UseCounter::SharedWorkerStart);
  63
  64     RefPtrWillBeRawPtr<SharedWorker> worker = adoptRefWillBeRefCountedGarbageCollected(new SharedWorker(context));
  65
  66     RefPtr<MessageChannel> channel = MessageChannel::create(context);
  67     worker->m_port = channel->port1();
  68     OwnPtr<blink::WebMessagePortChannel> remotePort = channel->port2()->disentangle();
  69     ASSERT(remotePort);
  70
  71     worker->suspendIfNeeded();
  72
  73     // We don't currently support nested workers, so workers can only be created from documents.
  74     Document* document = toDocument(context);
  75     if (!document->securityOrigin()->canAccessSharedWorkers()) {
  76         exceptionState.throwSecurityError("Access to shared workers is denied to origin '" + document->securityOrigin()->toString() + "'.");
  77         return nullptr;
  78     }
  79
  80     KURL scriptURL = worker->resolveURL(url, exceptionState);
  81     if (scriptURL.isEmpty())
  82         return nullptr;
  83
  84     if (document->frame()->loader().client()->sharedWorkerRepositoryClient())
  85         document->frame()->loader().client()->sharedWorkerRepositoryClient()->connect(worker.get(), remotePort.release(), scriptURL, name, exceptionState);
  86
  87     return worker.release();
  88 }
  89
  90 SharedWorker::~SharedWorker()
  91 {
  92 }
  93
  94 const AtomicString& SharedWorker::interfaceName() const
  95 {
  96     return EventTargetNames::SharedWorker;
  97 }
  98
  99 void SharedWorker::setPreventGC()
 100 {
 101     setPendingActivity(this);
 102 }
 103
 104 void SharedWorker::unsetPreventGC()
 105 {
 106     unsetPendingActivity(this);
 107 }
 108
 109 void SharedWorker::trace(Visitor* visitor)
 110 {
 111     AbstractWorker::trace(visitor);
 112     WillBeHeapSupplementable<SharedWorker>::trace(visitor);
 113 }
 114
 115 } // namespace WebCore