WebCoreAVFResourceLoader.mm [plain text]
/*
* Copyright (C) 2012-2017 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#import "config.h"
#import "WebCoreAVFResourceLoader.h"
#if ENABLE(VIDEO) && USE(AVFOUNDATION) && HAVE(AVFOUNDATION_LOADER_DELEGATE)
#import "CachedRawResource.h"
#import "CachedResourceLoader.h"
#import "CachedResourceRequest.h"
#import "MediaPlayerPrivateAVFoundationObjC.h"
#import "ResourceLoaderOptions.h"
#import "SharedBuffer.h"
#import "UTIUtilities.h"
#import <AVFoundation/AVAssetResourceLoader.h>
#import <objc/runtime.h>
#import <wtf/SoftLinking.h>
#import <wtf/text/CString.h>
namespace WebCore {
Ref<WebCoreAVFResourceLoader> WebCoreAVFResourceLoader::create(MediaPlayerPrivateAVFoundationObjC* parent, AVAssetResourceLoadingRequest *avRequest)
{
ASSERT(avRequest);
ASSERT(parent);
return adoptRef(*new WebCoreAVFResourceLoader(parent, avRequest));
}
WebCoreAVFResourceLoader::WebCoreAVFResourceLoader(MediaPlayerPrivateAVFoundationObjC* parent, AVAssetResourceLoadingRequest *avRequest)
: m_parent(parent)
, m_avRequest(avRequest)
{
}
WebCoreAVFResourceLoader::~WebCoreAVFResourceLoader()
{
stopLoading();
}
void WebCoreAVFResourceLoader::startLoading()
{
if (m_resource || !m_parent)
return;
NSURLRequest *nsRequest = [m_avRequest.get() request];
ResourceRequest resourceRequest(nsRequest);
resourceRequest.setPriority(ResourceLoadPriority::Low);
// FIXME: Skip Content Security Policy check if the element that inititated this request
// is in a user-agent shadow tree. See <https://bugs.webkit.org/show_bug.cgi?id=173498>.
CachedResourceRequest request(WTFMove(resourceRequest), ResourceLoaderOptions(
SendCallbackPolicy::SendCallbacks,
ContentSniffingPolicy::DoNotSniffContent,
DataBufferingPolicy::BufferData,
StoredCredentialsPolicy::DoNotUse,
ClientCredentialPolicy::CannotAskClientForCredentials,
FetchOptions::Credentials::Omit,
SecurityCheckPolicy::DoSecurityCheck,
FetchOptions::Mode::NoCors,
CertificateInfoPolicy::DoNotIncludeCertificateInfo,
ContentSecurityPolicyImposition::DoPolicyCheck,
DefersLoadingPolicy::AllowDefersLoading,
CachingPolicy::DisallowCaching));
if (auto* loader = m_parent->player()->cachedResourceLoader())
m_resource = loader->requestMedia(WTFMove(request)).value_or(nullptr);
if (m_resource)
m_resource->addClient(*this);
else {
LOG_ERROR("Failed to start load for media at url %s", [[[nsRequest URL] absoluteString] UTF8String]);
[m_avRequest.get() finishLoadingWithError:0];
}
}
void WebCoreAVFResourceLoader::stopLoading()
{
if (!m_resource)
return;
m_resource->removeClient(*this);
m_resource = 0;
if (m_parent && m_avRequest)
m_parent->didStopLoadingRequest(m_avRequest.get());
}
void WebCoreAVFResourceLoader::invalidate()
{
if (!m_parent)
return;
m_parent = nullptr;
callOnMainThread([protectedThis = makeRef(*this)] () mutable {
protectedThis->stopLoading();
});
}
void WebCoreAVFResourceLoader::responseReceived(CachedResource& resource, const ResourceResponse& response, CompletionHandler<void()>&& completionHandler)
{
ASSERT_UNUSED(resource, &resource == m_resource);
CompletionHandlerCallingScope completionHandlerCaller(WTFMove(completionHandler));
int status = response.httpStatusCode();
if (status && (status < 200 || status > 299)) {
[m_avRequest.get() finishLoadingWithError:0];
return;
}
if (AVAssetResourceLoadingContentInformationRequest* contentInfo = [m_avRequest.get() contentInformationRequest]) {
String uti = UTIFromMIMEType(response.mimeType());
[contentInfo setContentType:uti];
const ParsedContentRange& contentRange = m_resource->response().contentRange();
[contentInfo setContentLength:contentRange.isValid() ? contentRange.instanceLength() : response.expectedContentLength()];
[contentInfo setByteRangeAccessSupported:YES];
if (![m_avRequest dataRequest]) {
[m_avRequest.get() finishLoading];
stopLoading();
}
}
}
void WebCoreAVFResourceLoader::dataReceived(CachedResource& resource, const char*, int)
{
fulfillRequestWithResource(resource);
}
void WebCoreAVFResourceLoader::notifyFinished(CachedResource& resource)
{
if (resource.loadFailedOrCanceled()) {
// <rdar://problem/13987417> Set the contentType of the contentInformationRequest to an empty
// string to trigger AVAsset's playable value to complete loading.
if ([m_avRequest.get() contentInformationRequest] && ![[m_avRequest.get() contentInformationRequest] contentType])
[[m_avRequest.get() contentInformationRequest] setContentType:@""];
NSError* error = resource.errorOccurred() ? resource.resourceError().nsError() : nil;
[m_avRequest.get() finishLoadingWithError:error];
} else {
fulfillRequestWithResource(resource);
[m_avRequest.get() finishLoading];
}
stopLoading();
}
void WebCoreAVFResourceLoader::fulfillRequestWithResource(CachedResource& resource)
{
ASSERT_UNUSED(resource, &resource == m_resource);
AVAssetResourceLoadingDataRequest* dataRequest = [m_avRequest dataRequest];
if (!dataRequest)
return;
SharedBuffer* data = m_resource->resourceBuffer();
if (!data)
return;
NSUInteger responseOffset = 0;
const ParsedContentRange& contentRange = m_resource->response().contentRange();
if (contentRange.isValid())
responseOffset = static_cast<NSUInteger>(contentRange.firstBytePosition());
// Check for possible unsigned overflow.
ASSERT(dataRequest.currentOffset >= dataRequest.requestedOffset);
ASSERT(dataRequest.requestedLength >= (dataRequest.currentOffset - dataRequest.requestedOffset));
NSUInteger remainingLength = dataRequest.requestedLength - static_cast<NSUInteger>(dataRequest.currentOffset - dataRequest.requestedOffset);
auto bytesToSkip = dataRequest.currentOffset - responseOffset;
RetainPtr<NSArray> array = data->createNSDataArray();
for (NSData *segment in array.get()) {
if (bytesToSkip) {
if (bytesToSkip > segment.length) {
bytesToSkip -= segment.length;
continue;
}
auto bytesToUse = segment.length - bytesToSkip;
[dataRequest respondWithData:[segment subdataWithRange:NSMakeRange(static_cast<NSUInteger>(bytesToSkip), static_cast<NSUInteger>(segment.length - bytesToSkip))]];
bytesToSkip = 0;
remainingLength -= bytesToUse;
continue;
}
if (segment.length <= remainingLength) {
[dataRequest respondWithData:segment];
remainingLength -= segment.length;
continue;
}
[dataRequest respondWithData:[segment subdataWithRange:NSMakeRange(0, remainingLength)]];
remainingLength = 0;
break;
}
// There was not enough data in the buffer to satisfy the data request.
if (remainingLength)
return;
if (dataRequest.currentOffset + dataRequest.requestedLength >= dataRequest.requestedOffset) {
[m_avRequest.get() finishLoading];
stopLoading();
}
}
}
#endif // ENABLE(VIDEO) && USE(AVFOUNDATION)