1 /*
2 * Copyright (C) 2011 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 COMPUTER, 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 COMPUTER, 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
28 #include "core/loader/TextTrackLoader.h"
29
30 #include "core/FetchInitiatorTypeNames.h"
31 #include "core/dom/Document.h"
32 #include "core/fetch/CrossOriginAccessControl.h"
33 #include "core/fetch/FetchRequest.h"
34 #include "core/fetch/ResourceFetcher.h"
35 #include "core/inspector/ConsoleMessage.h"
36 #include "platform/Logging.h"
37 #include "platform/SharedBuffer.h"
38 #include "platform/weborigin/SecurityOrigin.h"
39
40 namespace blink {
41
TextTrackLoader(TextTrackLoaderClient & client,Document & document)42 TextTrackLoader::TextTrackLoader(TextTrackLoaderClient& client, Document& document)
43 : m_client(client)
44 , m_document(document)
45 , m_cueLoadTimer(this, &TextTrackLoader::cueLoadTimerFired)
46 , m_state(Idle)
47 , m_newCuesAvailable(false)
48 {
49 }
50
~TextTrackLoader()51 TextTrackLoader::~TextTrackLoader()
52 {
53 }
54
cueLoadTimerFired(Timer<TextTrackLoader> * timer)55 void TextTrackLoader::cueLoadTimerFired(Timer<TextTrackLoader>* timer)
56 {
57 ASSERT_UNUSED(timer, timer == &m_cueLoadTimer);
58
59 if (m_newCuesAvailable) {
60 m_newCuesAvailable = false;
61 m_client.newCuesAvailable(this);
62 }
63
64 if (m_state >= Finished)
65 m_client.cueLoadingCompleted(this, m_state == Failed);
66 }
67
cancelLoad()68 void TextTrackLoader::cancelLoad()
69 {
70 clearResource();
71 }
72
dataReceived(Resource * resource,const char * data,int length)73 void TextTrackLoader::dataReceived(Resource* resource, const char* data, int length)
74 {
75 ASSERT(this->resource() == resource);
76
77 if (m_state == Failed)
78 return;
79
80 if (!m_cueParser)
81 m_cueParser = VTTParser::create(this, document());
82
83 m_cueParser->parseBytes(data, length);
84 }
85
corsPolicyPreventedLoad(SecurityOrigin * securityOrigin,const KURL & url)86 void TextTrackLoader::corsPolicyPreventedLoad(SecurityOrigin* securityOrigin, const KURL& url)
87 {
88 String consoleMessage("Text track from origin '" + SecurityOrigin::create(url)->toString() + "' has been blocked from loading: Not at same origin as the document, and parent of track element does not have a 'crossorigin' attribute. Origin '" + securityOrigin->toString() + "' is therefore not allowed access.");
89 document().addConsoleMessage(ConsoleMessage::create(SecurityMessageSource, ErrorMessageLevel, consoleMessage));
90 m_state = Failed;
91 }
92
notifyFinished(Resource * resource)93 void TextTrackLoader::notifyFinished(Resource* resource)
94 {
95 ASSERT(this->resource() == resource);
96 if (m_state != Failed)
97 m_state = resource->errorOccurred() ? Failed : Finished;
98
99 if (m_state == Finished && m_cueParser)
100 m_cueParser->flush();
101
102 if (!m_cueLoadTimer.isActive())
103 m_cueLoadTimer.startOneShot(0, FROM_HERE);
104
105 cancelLoad();
106 }
107
load(const KURL & url,const AtomicString & crossOriginMode)108 bool TextTrackLoader::load(const KURL& url, const AtomicString& crossOriginMode)
109 {
110 cancelLoad();
111
112 FetchRequest cueRequest(ResourceRequest(document().completeURL(url)), FetchInitiatorTypeNames::texttrack);
113
114 if (!crossOriginMode.isNull()) {
115 cueRequest.setCrossOriginAccessControl(document().securityOrigin(), crossOriginMode);
116 } else if (!document().securityOrigin()->canRequest(url)) {
117 // Text track elements without 'crossorigin' set on the parent are "No CORS"; report error if not same-origin.
118 corsPolicyPreventedLoad(document().securityOrigin(), url);
119 return false;
120 }
121
122 ResourceFetcher* fetcher = document().fetcher();
123 setResource(fetcher->fetchTextTrack(cueRequest));
124 return resource();
125 }
126
newCuesParsed()127 void TextTrackLoader::newCuesParsed()
128 {
129 if (m_cueLoadTimer.isActive())
130 return;
131
132 m_newCuesAvailable = true;
133 m_cueLoadTimer.startOneShot(0, FROM_HERE);
134 }
135
newRegionsParsed()136 void TextTrackLoader::newRegionsParsed()
137 {
138 m_client.newRegionsAvailable(this);
139 }
140
fileFailedToParse()141 void TextTrackLoader::fileFailedToParse()
142 {
143 WTF_LOG(Media, "TextTrackLoader::fileFailedToParse");
144
145 m_state = Failed;
146
147 if (!m_cueLoadTimer.isActive())
148 m_cueLoadTimer.startOneShot(0, FROM_HERE);
149
150 cancelLoad();
151 }
152
getNewCues(WillBeHeapVector<RefPtrWillBeMember<VTTCue>> & outputCues)153 void TextTrackLoader::getNewCues(WillBeHeapVector<RefPtrWillBeMember<VTTCue> >& outputCues)
154 {
155 ASSERT(m_cueParser);
156 if (m_cueParser)
157 m_cueParser->getNewCues(outputCues);
158 }
159
getNewRegions(WillBeHeapVector<RefPtrWillBeMember<VTTRegion>> & outputRegions)160 void TextTrackLoader::getNewRegions(WillBeHeapVector<RefPtrWillBeMember<VTTRegion> >& outputRegions)
161 {
162 ASSERT(m_cueParser);
163 if (m_cueParser)
164 m_cueParser->getNewRegions(outputRegions);
165 }
166
trace(Visitor * visitor)167 void TextTrackLoader::trace(Visitor* visitor)
168 {
169 visitor->trace(m_cueParser);
170 visitor->trace(m_document);
171 }
172
173 }
174