blob: 76a4e978dc860a5e3664d3805926f9ffdbf35cd2 [file] [log] [blame]
/*
* Copyright (C) 2011 Google Inc. All rights reserved.
* Copyright (C) 2014-2017 Apple 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 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 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"
#if ENABLE(VIDEO_TRACK)
#include "TextTrackLoader.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "CachedTextTrack.h"
#include "CrossOriginAccessControl.h"
#include "Document.h"
#include "HTMLTrackElement.h"
#include "InspectorInstrumentation.h"
#include "Logging.h"
#include "SharedBuffer.h"
#include "VTTCue.h"
#include "WebVTTParser.h"
#include <wtf/NeverDestroyed.h>
namespace WebCore {
TextTrackLoader::TextTrackLoader(TextTrackLoaderClient& client, Document& document)
: m_client(client)
, m_document(document)
, m_cueLoadTimer(*this, &TextTrackLoader::cueLoadTimerFired)
{
}
TextTrackLoader::~TextTrackLoader()
{
if (m_resource)
m_resource->removeClient(*this);
}
void TextTrackLoader::cueLoadTimerFired()
{
if (m_newCuesAvailable) {
m_newCuesAvailable = false;
m_client.newCuesAvailable(*this);
}
if (m_state >= Finished)
m_client.cueLoadingCompleted(*this, m_state == Failed);
}
void TextTrackLoader::cancelLoad()
{
if (m_resource) {
m_resource->removeClient(*this);
m_resource = nullptr;
}
}
void TextTrackLoader::processNewCueData(CachedResource& resource)
{
ASSERT_UNUSED(resource, m_resource == &resource);
if (m_state == Failed || !m_resource->resourceBuffer())
return;
auto* buffer = m_resource->resourceBuffer();
if (m_parseOffset == buffer->size())
return;
if (!m_cueParser)
m_cueParser = makeUnique<WebVTTParser>(static_cast<WebVTTParserClient&>(*this), m_document);
while (m_parseOffset < buffer->size()) {
auto data = buffer->getSomeData(m_parseOffset);
m_cueParser->parseBytes(data.data(), data.size());
m_parseOffset += data.size();
}
}
// FIXME: This is a very unusual pattern, no other CachedResourceClient does this. Refactor to use notifyFinished() instead.
void TextTrackLoader::deprecatedDidReceiveCachedResource(CachedResource& resource)
{
ASSERT_UNUSED(resource, m_resource == &resource);
if (!m_resource->resourceBuffer())
return;
processNewCueData(*m_resource);
}
void TextTrackLoader::corsPolicyPreventedLoad()
{
static NeverDestroyed<String> consoleMessage(MAKE_STATIC_STRING_IMPL("Cross-origin text track load denied by Cross-Origin Resource Sharing policy."));
m_document.addConsoleMessage(MessageSource::Security, MessageLevel::Error, consoleMessage);
m_state = Failed;
}
void TextTrackLoader::notifyFinished(CachedResource& resource, const NetworkLoadMetrics&)
{
ASSERT_UNUSED(resource, m_resource == &resource);
if (m_resource->resourceError().isAccessControl())
corsPolicyPreventedLoad();
if (m_state != Failed) {
processNewCueData(*m_resource);
if (m_cueParser)
m_cueParser->fileFinished();
if (m_state != Failed)
m_state = m_resource->errorOccurred() ? Failed : Finished;
}
if (m_state == Finished && m_cueParser)
m_cueParser->flush();
if (!m_cueLoadTimer.isActive())
m_cueLoadTimer.startOneShot(0_s);
cancelLoad();
}
bool TextTrackLoader::load(const URL& url, HTMLTrackElement& element)
{
cancelLoad();
ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
options.sameOriginDataURLFlag = SameOriginDataURLFlag::Set;
options.contentSecurityPolicyImposition = element.isInUserAgentShadowTree() ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
// FIXME: Do we really need to call completeURL here?
ResourceRequest resourceRequest(m_document.completeURL(url.string()));
if (auto mediaElement = element.mediaElement())
resourceRequest.setInspectorInitiatorNodeIdentifier(InspectorInstrumentation::identifierForNode(*mediaElement));
auto cueRequest = createPotentialAccessControlRequest(WTFMove(resourceRequest), WTFMove(options), m_document, element.mediaElementCrossOriginAttribute(), SameOriginFlag::Yes);
m_resource = m_document.cachedResourceLoader().requestTextTrack(WTFMove(cueRequest)).value_or(nullptr);
if (!m_resource)
return false;
m_resource->addClient(*this);
return true;
}
void TextTrackLoader::newCuesParsed()
{
if (m_cueLoadTimer.isActive())
return;
m_newCuesAvailable = true;
m_cueLoadTimer.startOneShot(0_s);
}
void TextTrackLoader::newRegionsParsed()
{
m_client.newRegionsAvailable(*this);
}
void TextTrackLoader::newStyleSheetsParsed()
{
m_client.newStyleSheetsAvailable(*this);
}
void TextTrackLoader::fileFailedToParse()
{
LOG(Media, "TextTrackLoader::fileFailedToParse");
m_state = Failed;
if (!m_cueLoadTimer.isActive())
m_cueLoadTimer.startOneShot(0_s);
cancelLoad();
}
Vector<Ref<VTTCue>> TextTrackLoader::getNewCues()
{
ASSERT(m_cueParser);
if (!m_cueParser)
return { };
auto cues = m_cueParser->takeCues();
Vector<Ref<VTTCue>> result;
result.reserveInitialCapacity(cues.size());
for (auto& cueData : cues)
result.uncheckedAppend(VTTCue::create(m_document, cueData));
return result;
}
Vector<Ref<VTTRegion>> TextTrackLoader::getNewRegions()
{
ASSERT(m_cueParser);
if (!m_cueParser)
return { };
return m_cueParser->takeRegions();
}
Vector<String> TextTrackLoader::getNewStyleSheets()
{
ASSERT(m_cueParser);
if (!m_cueParser)
return { };
return m_cueParser->takeStyleSheets();
}
}
#endif