1/*
2 * Copyright (C) 2013 Google Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "core/html/parser/HTMLResourcePreloader.h"
28
29#include "core/dom/Document.h"
30#include "core/fetch/FetchInitiatorInfo.h"
31#include "core/fetch/ResourceFetcher.h"
32#include "core/html/imports/HTMLImport.h"
33#include "core/rendering/RenderObject.h"
34#include "public/platform/Platform.h"
35
36namespace blink {
37
38bool PreloadRequest::isSafeToSendToAnotherThread() const
39{
40    return m_initiatorName.isSafeToSendToAnotherThread()
41        && m_charset.isSafeToSendToAnotherThread()
42        && m_resourceURL.isSafeToSendToAnotherThread()
43        && m_baseURL.isSafeToSendToAnotherThread();
44}
45
46KURL PreloadRequest::completeURL(Document* document)
47{
48    return document->completeURLWithOverride(m_resourceURL, m_baseURL.isEmpty() ? document->url() : m_baseURL);
49}
50
51FetchRequest PreloadRequest::resourceRequest(Document* document)
52{
53    ASSERT(isMainThread());
54    FetchInitiatorInfo initiatorInfo;
55    initiatorInfo.name = AtomicString(m_initiatorName);
56    initiatorInfo.position = m_initiatorPosition;
57    FetchRequest request(ResourceRequest(completeURL(document)), initiatorInfo);
58
59    if (m_isCORSEnabled)
60        request.setCrossOriginAccessControl(document->securityOrigin(), m_allowCredentials);
61    return request;
62}
63
64inline HTMLResourcePreloader::HTMLResourcePreloader(Document& document)
65    : m_document(document)
66{
67}
68
69PassOwnPtrWillBeRawPtr<HTMLResourcePreloader> HTMLResourcePreloader::create(Document& document)
70{
71    return adoptPtrWillBeNoop(new HTMLResourcePreloader(document));
72}
73
74void HTMLResourcePreloader::trace(Visitor* visitor)
75{
76    visitor->trace(m_document);
77}
78
79void HTMLResourcePreloader::takeAndPreload(PreloadRequestStream& r)
80{
81    PreloadRequestStream requests;
82    requests.swap(r);
83
84    for (PreloadRequestStream::iterator it = requests.begin(); it != requests.end(); ++it)
85        preload(it->release());
86}
87
88void HTMLResourcePreloader::preload(PassOwnPtr<PreloadRequest> preload)
89{
90    FetchRequest request = preload->resourceRequest(m_document);
91    request.setDefer(preload->defer());
92    blink::Platform::current()->histogramCustomCounts("WebCore.PreloadDelayMs", static_cast<int>(1000 * (monotonicallyIncreasingTime() - preload->discoveryTime())), 0, 2000, 20);
93    m_document->fetcher()->preload(preload->resourceType(), request, preload->charset());
94}
95
96}
97