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
34#if ENABLE(SHARED_WORKERS)
35
36#include "SharedWorker.h"
37
38#include "ExceptionCode.h"
39#include "FeatureObserver.h"
40#include "InspectorInstrumentation.h"
41#include "KURL.h"
42#include "MessageChannel.h"
43#include "MessagePort.h"
44#include "ScriptExecutionContext.h"
45#include "SecurityOrigin.h"
46#include "SharedWorkerRepository.h"
47
48namespace WebCore {
49
50inline SharedWorker::SharedWorker(ScriptExecutionContext* context)
51    : AbstractWorker(context)
52{
53}
54
55PassRefPtr<SharedWorker> SharedWorker::create(ScriptExecutionContext* context, const String& url, const String& name, ExceptionCode& ec)
56{
57    ASSERT(isMainThread());
58    FeatureObserver::observe(static_cast<Document*>(context)->domWindow(), FeatureObserver::SharedWorkerStart);
59
60    RefPtr<SharedWorker> worker = adoptRef(new SharedWorker(context));
61
62    RefPtr<MessageChannel> channel = MessageChannel::create(context);
63    worker->m_port = channel->port1();
64    OwnPtr<MessagePortChannel> remotePort = channel->port2()->disentangle();
65    ASSERT(remotePort);
66
67    worker->suspendIfNeeded();
68
69    KURL scriptURL = worker->resolveURL(url, ec);
70    if (scriptURL.isEmpty())
71        return 0;
72
73    // We don't currently support nested workers, so workers can only be created from documents.
74    ASSERT_WITH_SECURITY_IMPLICATION(context->isDocument());
75    Document* document = static_cast<Document*>(context);
76    if (!document->securityOrigin()->canAccessSharedWorkers(document->topOrigin())) {
77        ec = SECURITY_ERR;
78        return 0;
79    }
80
81    SharedWorkerRepository::connect(worker.get(), remotePort.release(), scriptURL, name, ec);
82
83    return worker.release();
84}
85
86SharedWorker::~SharedWorker()
87{
88}
89
90const AtomicString& SharedWorker::interfaceName() const
91{
92    return eventNames().interfaceForSharedWorker;
93}
94
95} // namespace WebCore
96
97#endif  // ENABLE(SHARED_WORKERS)
98