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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/loader/TextTrackLoader.h"
#include "core/dom/Document.h"
#include "core/fetch/FetchInitiatorTypeNames.h"
#include "core/fetch/FetchRequest.h"
#include "core/fetch/RawResource.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/inspector/ConsoleMessage.h"
#include "platform/Logging.h"
#include "platform/SharedBuffer.h"
#include "platform/weborigin/SecurityOrigin.h"
namespace blink {
TextTrackLoader::TextTrackLoader(TextTrackLoaderClient& client, Document& document)
: m_client(client)
, m_document(document)
, m_cueLoadTimer(this, &TextTrackLoader::cueLoadTimerFired)
, m_state(Idle)
, m_newCuesAvailable(false)
{
}
TextTrackLoader::~TextTrackLoader()
{
}
void TextTrackLoader::cueLoadTimerFired(Timer<TextTrackLoader>* timer)
{
ASSERT_UNUSED(timer, timer == &m_cueLoadTimer);
if (m_newCuesAvailable) {
m_newCuesAvailable = false;
m_client.newCuesAvailable(this);
}
if (m_state >= Finished)
m_client.cueLoadingCompleted(this, m_state == Failed);
}
void TextTrackLoader::cancelLoad()
{
clearResource();
}
void TextTrackLoader::dataReceived(Resource* resource, const char* data, unsigned length)
{
ASSERT(this->resource() == resource);
if (m_state == Failed)
return;
if (!m_cueParser)
m_cueParser = VTTParser::create(this, document());
m_cueParser->parseBytes(data, length);
}
void TextTrackLoader::corsPolicyPreventedLoad(SecurityOrigin* securityOrigin, const KURL& url)
{
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.");
document().addConsoleMessage(ConsoleMessage::create(SecurityMessageSource, ErrorMessageLevel, consoleMessage));
m_state = Failed;
}
void TextTrackLoader::notifyFinished(Resource* resource)
{
ASSERT(this->resource() == resource);
if (m_state != Failed)
m_state = resource->errorOccurred() ? Failed : Finished;
if (m_state == Finished && m_cueParser)
m_cueParser->flush();
if (!m_cueLoadTimer.isActive())
m_cueLoadTimer.startOneShot(0, BLINK_FROM_HERE);
cancelLoad();
}
bool TextTrackLoader::load(const KURL& url, const AtomicString& crossOriginMode)
{
cancelLoad();
FetchRequest cueRequest(ResourceRequest(document().completeURL(url)), FetchInitiatorTypeNames::texttrack);
if (!crossOriginMode.isNull()) {
cueRequest.setCrossOriginAccessControl(document().securityOrigin(), crossOriginMode);
} else if (!document().securityOrigin()->canRequestNoSuborigin(url)) {
// Text track elements without 'crossorigin' set on the parent are "No CORS"; report error if not same-origin.
corsPolicyPreventedLoad(document().securityOrigin(), url);
return false;
}
ResourceFetcher* fetcher = document().fetcher();
setResource(RawResource::fetchTextTrack(cueRequest, fetcher));
return resource();
}
void TextTrackLoader::newCuesParsed()
{
if (m_cueLoadTimer.isActive())
return;
m_newCuesAvailable = true;
m_cueLoadTimer.startOneShot(0, BLINK_FROM_HERE);
}
void TextTrackLoader::newRegionsParsed()
{
m_client.newRegionsAvailable(this);
}
void TextTrackLoader::fileFailedToParse()
{
WTF_LOG(Media, "TextTrackLoader::fileFailedToParse");
m_state = Failed;
if (!m_cueLoadTimer.isActive())
m_cueLoadTimer.startOneShot(0, BLINK_FROM_HERE);
cancelLoad();
}
void TextTrackLoader::getNewCues(HeapVector<Member<TextTrackCue>>& outputCues)
{
ASSERT(m_cueParser);
if (m_cueParser)
m_cueParser->getNewCues(outputCues);
}
void TextTrackLoader::getNewRegions(HeapVector<Member<VTTRegion>>& outputRegions)
{
ASSERT(m_cueParser);
if (m_cueParser)
m_cueParser->getNewRegions(outputRegions);
}
DEFINE_TRACE(TextTrackLoader)
{
visitor->trace(m_cueParser);
visitor->trace(m_document);
}
}