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