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 40namespace blink { 41 42TextTrackLoader::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 51TextTrackLoader::~TextTrackLoader() 52{ 53} 54 55void 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 68void TextTrackLoader::cancelLoad() 69{ 70 clearResource(); 71} 72 73void 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 86void 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 93void 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 108bool 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 127void TextTrackLoader::newCuesParsed() 128{ 129 if (m_cueLoadTimer.isActive()) 130 return; 131 132 m_newCuesAvailable = true; 133 m_cueLoadTimer.startOneShot(0, FROM_HERE); 134} 135 136void TextTrackLoader::newRegionsParsed() 137{ 138 m_client.newRegionsAvailable(this); 139} 140 141void 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 153void TextTrackLoader::getNewCues(WillBeHeapVector<RefPtrWillBeMember<VTTCue> >& outputCues) 154{ 155 ASSERT(m_cueParser); 156 if (m_cueParser) 157 m_cueParser->getNewCues(outputCues); 158} 159 160void TextTrackLoader::getNewRegions(WillBeHeapVector<RefPtrWillBeMember<VTTRegion> >& outputRegions) 161{ 162 ASSERT(m_cueParser); 163 if (m_cueParser) 164 m_cueParser->getNewRegions(outputRegions); 165} 166 167void TextTrackLoader::trace(Visitor* visitor) 168{ 169 visitor->trace(m_cueParser); 170 visitor->trace(m_document); 171} 172 173} 174