1/*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 * Copyright (C) 2010 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
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.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "config.h"
33#include "core/workers/SharedWorker.h"
34
35#include "bindings/core/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
49namespace blink {
50
51inline SharedWorker::SharedWorker(ExecutionContext* context)
52    : AbstractWorker(context)
53    , m_isBeingConnected(false)
54{
55}
56
57PassRefPtrWillBeRawPtr<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 = adoptRefWillBeNoop(new SharedWorker(context));
65
66    RefPtrWillBeRawPtr<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
90SharedWorker::~SharedWorker()
91{
92}
93
94const AtomicString& SharedWorker::interfaceName() const
95{
96    return EventTargetNames::SharedWorker;
97}
98
99bool SharedWorker::hasPendingActivity() const
100{
101    return m_isBeingConnected;
102}
103
104void SharedWorker::trace(Visitor* visitor)
105{
106#if ENABLE(OILPAN)
107    visitor->trace(m_port);
108    HeapSupplementable<SharedWorker>::trace(visitor);
109#endif
110    AbstractWorker::trace(visitor);
111}
112
113} // namespace blink
114