blob: 08d766d6d42e7c2b4ebe1f2c7113787a4680ca3f [file] [log] [blame]
/*
* Copyright (C) 2006-2017 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE 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 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.
*/
#include "config.h"
#include "SubresourceLoader.h"
#include "CachedRawResource.h"
#include "CachedResourceLoader.h"
#include "CrossOriginAccessControl.h"
#include "DiagnosticLoggingClient.h"
#include "DiagnosticLoggingKeys.h"
#include "Document.h"
#include "DocumentLoader.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "HTTPParsers.h"
#include "LinkLoader.h"
#include "Logging.h"
#include "MemoryCache.h"
#include "Page.h"
#include "ResourceLoadObserver.h"
#include "ResourceTiming.h"
#include "RuntimeEnabledFeatures.h"
#include "Settings.h"
#include <wtf/CompletionHandler.h>
#include <wtf/Ref.h>
#include <wtf/RefCountedLeakCounter.h>
#include <wtf/StdLibExtras.h>
#include <wtf/SystemTracing.h>
#include <wtf/text/CString.h>
#if PLATFORM(IOS)
#include <RuntimeApplicationChecks.h>
#endif
#if ENABLE(CONTENT_EXTENSIONS)
#include "ResourceLoadInfo.h"
#endif
#if USE(QUICK_LOOK)
#include "PreviewLoader.h"
#endif
namespace WebCore {
DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, subresourceLoaderCounter, ("SubresourceLoader"));
SubresourceLoader::RequestCountTracker::RequestCountTracker(CachedResourceLoader& cachedResourceLoader, const CachedResource& resource)
: m_cachedResourceLoader(cachedResourceLoader)
, m_resource(resource)
{
m_cachedResourceLoader.incrementRequestCount(m_resource);
}
SubresourceLoader::RequestCountTracker::~RequestCountTracker()
{
m_cachedResourceLoader.decrementRequestCount(m_resource);
}
SubresourceLoader::SubresourceLoader(Frame& frame, CachedResource& resource, const ResourceLoaderOptions& options)
: ResourceLoader(frame, options)
, m_resource(&resource)
, m_state(Uninitialized)
, m_requestCountTracker(std::in_place, frame.document()->cachedResourceLoader(), resource)
{
#ifndef NDEBUG
subresourceLoaderCounter.increment();
#endif
#if ENABLE(CONTENT_EXTENSIONS)
m_resourceType = toResourceType(resource.type());
#endif
m_canCrossOriginRequestsAskUserForCredentials = resource.type() == CachedResource::MainResource || frame.settings().allowCrossOriginSubresourcesToAskForCredentials();
}
SubresourceLoader::~SubresourceLoader()
{
ASSERT(m_state != Initialized);
ASSERT(reachedTerminalState());
#ifndef NDEBUG
subresourceLoaderCounter.decrement();
#endif
}
void SubresourceLoader::create(Frame& frame, CachedResource& resource, ResourceRequest&& request, const ResourceLoaderOptions& options, CompletionHandler<void(RefPtr<SubresourceLoader>&&)>&& completionHandler)
{
auto subloader(adoptRef(*new SubresourceLoader(frame, resource, options)));
#if PLATFORM(IOS)
if (!IOSApplication::isWebProcess()) {
// On iOS, do not invoke synchronous resource load delegates while resource load scheduling
// is disabled to avoid re-entering style selection from a different thread (see <rdar://problem/9121719>).
// FIXME: This should be fixed for all ports in <https://bugs.webkit.org/show_bug.cgi?id=56647>.
subloader->m_iOSOriginalRequest = request;
return completionHandler(WTFMove(subloader));
}
#endif
subloader->init(WTFMove(request), [subloader = subloader.copyRef(), completionHandler = WTFMove(completionHandler)] (bool initialized) mutable {
if (!initialized)
return completionHandler(nullptr);
completionHandler(WTFMove(subloader));
});
}
#if PLATFORM(IOS)
void SubresourceLoader::startLoading()
{
// FIXME: this should probably be removed.
ASSERT(!IOSApplication::isWebProcess());
init(ResourceRequest(m_iOSOriginalRequest), [this, protectedThis = makeRef(*this)] (bool success) {
if (!success)
return;
m_iOSOriginalRequest = ResourceRequest();
start();
});
}
#endif
CachedResource* SubresourceLoader::cachedResource()
{
return m_resource;
}
void SubresourceLoader::cancelIfNotFinishing()
{
if (m_state != Initialized)
return;
ResourceLoader::cancel();
}
void SubresourceLoader::init(ResourceRequest&& request, CompletionHandler<void(bool)>&& completionHandler)
{
ResourceLoader::init(WTFMove(request), [this, protectedThis = makeRef(*this), completionHandler = WTFMove(completionHandler)] (bool initialized) mutable {
if (!initialized)
return completionHandler(false);
ASSERT(!reachedTerminalState());
m_state = Initialized;
m_documentLoader->addSubresourceLoader(this);
m_origin = m_resource->origin();
completionHandler(true);
});
}
bool SubresourceLoader::isSubresourceLoader() const
{
return true;
}
void SubresourceLoader::willSendRequestInternal(ResourceRequest&& newRequest, const ResourceResponse& redirectResponse, CompletionHandler<void(ResourceRequest&&)>&& completionHandler)
{
// Store the previous URL because the call to ResourceLoader::willSendRequest will modify it.
URL previousURL = request().url();
Ref<SubresourceLoader> protectedThis(*this);
if (!newRequest.url().isValid()) {
cancel(cannotShowURLError());
return completionHandler(WTFMove(newRequest));
}
if (newRequest.requester() != ResourceRequestBase::Requester::Main) {
tracePoint(SubresourceLoadWillStart);
ResourceLoadObserver::shared().logSubresourceLoading(m_frame.get(), newRequest, redirectResponse);
}
auto continueWillSendRequest = [this, protectedThis = makeRef(*this), redirectResponse] (CompletionHandler<void(ResourceRequest&&)>&& completionHandler, ResourceRequest&& newRequest) mutable {
if (newRequest.isNull() || reachedTerminalState())
return completionHandler(WTFMove(newRequest));
ResourceLoader::willSendRequestInternal(WTFMove(newRequest), redirectResponse, [this, protectedThis = WTFMove(protectedThis), completionHandler = WTFMove(completionHandler), redirectResponse] (ResourceRequest&& request) mutable {
if (reachedTerminalState())
return completionHandler(WTFMove(request));
if (request.isNull()) {
cancel();
return completionHandler(WTFMove(request));
}
if (m_resource->type() == CachedResource::MainResource && !redirectResponse.isNull())
m_documentLoader->willContinueMainResourceLoadAfterRedirect(request);
completionHandler(WTFMove(request));
});
};
ASSERT(!newRequest.isNull());
if (!redirectResponse.isNull()) {
if (options().redirect != FetchOptions::Redirect::Follow) {
if (options().redirect == FetchOptions::Redirect::Error) {
cancel(ResourceError { errorDomainWebKitInternal, 0, redirectResponse.url(), "Redirections are not allowed", ResourceError::Type::AccessControl });
return completionHandler(WTFMove(newRequest));
}
ResourceResponse opaqueRedirectedResponse = redirectResponse;
opaqueRedirectedResponse.setType(ResourceResponse::Type::Opaqueredirect);
opaqueRedirectedResponse.setTainting(ResourceResponse::Tainting::Opaqueredirect);
m_resource->responseReceived(opaqueRedirectedResponse);
if (reachedTerminalState())
return;
NetworkLoadMetrics emptyMetrics;
didFinishLoading(emptyMetrics);
return completionHandler(WTFMove(newRequest));
} else if (m_redirectCount++ >= options().maxRedirectCount) {
cancel(ResourceError(String(), 0, request().url(), ASCIILiteral("Too many redirections"), ResourceError::Type::General));
return completionHandler(WTFMove(newRequest));
}
// CachedResources are keyed off their original request URL.
// Requesting the same original URL a second time can redirect to a unique second resource.
// Therefore, if a redirect to a different destination URL occurs, we should no longer consider this a revalidation of the first resource.
// Doing so would have us reusing the resource from the first request if the second request's revalidation succeeds.
if (newRequest.isConditional() && m_resource->resourceToRevalidate() && newRequest.url() != m_resource->resourceToRevalidate()->response().url()) {
newRequest.makeUnconditional();
MemoryCache::singleton().revalidationFailed(*m_resource);
if (m_frame && m_frame->page())
m_frame->page()->diagnosticLoggingClient().logDiagnosticMessageWithResult(DiagnosticLoggingKeys::cachedResourceRevalidationKey(), emptyString(), DiagnosticLoggingResultFail, ShouldSample::Yes);
}
if (!m_documentLoader->cachedResourceLoader().updateRequestAfterRedirection(m_resource->type(), newRequest, options())) {
cancel();
return completionHandler(WTFMove(newRequest));
}
String errorDescription;
if (!checkRedirectionCrossOriginAccessControl(request(), redirectResponse, newRequest, errorDescription)) {
String errorMessage = "Cross-origin redirection to " + newRequest.url().string() + " denied by Cross-Origin Resource Sharing policy: " + errorDescription;
if (m_frame && m_frame->document())
m_frame->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, errorMessage);
cancel(ResourceError(String(), 0, request().url(), errorMessage, ResourceError::Type::AccessControl));
return completionHandler(WTFMove(newRequest));
}
if (m_resource->isImage() && m_documentLoader->cachedResourceLoader().shouldDeferImageLoad(newRequest.url())) {
cancel();
return completionHandler(WTFMove(newRequest));
}
m_loadTiming.addRedirect(redirectResponse.url(), newRequest.url());
m_resource->redirectReceived(WTFMove(newRequest), redirectResponse, [completionHandler = WTFMove(completionHandler), continueWillSendRequest = WTFMove(continueWillSendRequest)] (ResourceRequest&& request) mutable {
continueWillSendRequest(WTFMove(completionHandler), WTFMove(request));
});
return;
}
continueWillSendRequest(WTFMove(completionHandler), WTFMove(newRequest));
}
void SubresourceLoader::didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
{
ASSERT(m_state == Initialized);
Ref<SubresourceLoader> protectedThis(*this);
m_resource->didSendData(bytesSent, totalBytesToBeSent);
}
#if USE(QUICK_LOOK)
bool SubresourceLoader::shouldCreatePreviewLoaderForResponse(const ResourceResponse& response) const
{
if (m_resource->type() != CachedResource::MainResource)
return false;
if (m_previewLoader)
return false;
return PreviewLoader::shouldCreateForMIMEType(response.mimeType());
}
#endif
void SubresourceLoader::didReceiveResponse(const ResourceResponse& response, CompletionHandler<void()>&& policyCompletionHandler)
{
ASSERT(!response.isNull());
ASSERT(m_state == Initialized);
CompletionHandlerCallingScope completionHandlerCaller(WTFMove(policyCompletionHandler));
#if USE(QUICK_LOOK)
if (shouldCreatePreviewLoaderForResponse(response)) {
m_previewLoader = PreviewLoader::create(*this, response);
return;
}
#endif
#if ENABLE(SERVICE_WORKER)
// Implementing step 10 of https://fetch.spec.whatwg.org/#main-fetch for service worker responses.
if (response.source() == ResourceResponse::Source::ServiceWorker && response.url() != request().url()) {
auto& loader = m_documentLoader->cachedResourceLoader();
if (!loader.allowedByContentSecurityPolicy(m_resource->type(), response.url(), options(), ContentSecurityPolicy::RedirectResponseReceived::Yes)) {
cancel(ResourceError({ }, 0, response.url(), { }, ResourceError::Type::General));
return;
}
}
#endif
// We want redirect responses to be processed through willSendRequestInternal.
// The only exception is redirection with no Location headers. Or in rare circumstances,
// cases of too many redirects from CFNetwork (<rdar://problem/30610988>).
#if !PLATFORM(COCOA)
ASSERT(response.httpStatusCode() < 300 || response.httpStatusCode() >= 400 || response.httpStatusCode() == 304 || !response.httpHeaderField(HTTPHeaderName::Location));
#endif
// Reference the object in this method since the additional processing can do
// anything including removing the last reference to this object; one example of this is 3266216.
Ref<SubresourceLoader> protectedThis(*this);
if (shouldIncludeCertificateInfo())
response.includeCertificateInfo();
if (m_resource->resourceToRevalidate()) {
if (response.httpStatusCode() == 304) {
// 304 Not modified / Use local copy
// Existing resource is ok, just use it updating the expiration time.
ResourceResponse revalidationResponse = response;
revalidationResponse.setSource(ResourceResponse::Source::MemoryCacheAfterValidation);
m_resource->setResponse(revalidationResponse);
MemoryCache::singleton().revalidationSucceeded(*m_resource, revalidationResponse);
if (m_frame && m_frame->page())
m_frame->page()->diagnosticLoggingClient().logDiagnosticMessageWithResult(DiagnosticLoggingKeys::cachedResourceRevalidationKey(), emptyString(), DiagnosticLoggingResultPass, ShouldSample::Yes);
if (!reachedTerminalState())
ResourceLoader::didReceiveResponse(revalidationResponse, [completionHandlerCaller = WTFMove(completionHandlerCaller)] { });
return;
}
// Did not get 304 response, continue as a regular resource load.
MemoryCache::singleton().revalidationFailed(*m_resource);
if (m_frame && m_frame->page())
m_frame->page()->diagnosticLoggingClient().logDiagnosticMessageWithResult(DiagnosticLoggingKeys::cachedResourceRevalidationKey(), emptyString(), DiagnosticLoggingResultFail, ShouldSample::Yes);
}
String errorDescription;
if (!checkResponseCrossOriginAccessControl(response, errorDescription)) {
if (m_frame && m_frame->document())
m_frame->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, errorDescription);
cancel(ResourceError(String(), 0, request().url(), errorDescription, ResourceError::Type::AccessControl));
return;
}
m_resource->responseReceived(response);
if (reachedTerminalState())
return;
bool isResponseMultipart = response.isMultipart();
if (options().mode != FetchOptions::Mode::Navigate)
LinkLoader::loadLinksFromHeader(response.httpHeaderField(HTTPHeaderName::Link), m_documentLoader->url(), *m_frame->document(), LinkLoader::MediaAttributeCheck::SkipMediaAttributeCheck);
ResourceLoader::didReceiveResponse(response, [this, protectedThis = WTFMove(protectedThis), isResponseMultipart, completionHandlerCaller = WTFMove(completionHandlerCaller)]() mutable {
if (reachedTerminalState())
return;
// FIXME: Main resources have a different set of rules for multipart than images do.
// Hopefully we can merge those 2 paths.
if (isResponseMultipart && m_resource->type() != CachedResource::MainResource) {
m_loadingMultipartContent = true;
// We don't count multiParts in a CachedResourceLoader's request count
m_requestCountTracker = std::nullopt;
if (!m_resource->isImage()) {
cancel();
return;
}
}
auto* buffer = resourceData();
if (m_loadingMultipartContent && buffer && buffer->size()) {
// The resource data will change as the next part is loaded, so we need to make a copy.
m_resource->finishLoading(buffer->copy().ptr());
clearResourceData();
// Since a subresource loader does not load multipart sections progressively, data was delivered to the loader all at once.
// After the first multipart section is complete, signal to delegates that this load is "finished"
NetworkLoadMetrics emptyMetrics;
m_documentLoader->subresourceLoaderFinishedLoadingOnePart(this);
didFinishLoadingOnePart(emptyMetrics);
}
checkForHTTPStatusCodeError();
if (m_inAsyncResponsePolicyCheck)
m_policyForResponseCompletionHandler = completionHandlerCaller.release();
});
}
void SubresourceLoader::didReceiveResponsePolicy()
{
ASSERT(m_inAsyncResponsePolicyCheck);
m_inAsyncResponsePolicyCheck = false;
if (auto completionHandler = WTFMove(m_policyForResponseCompletionHandler))
completionHandler();
}
void SubresourceLoader::didReceiveData(const char* data, unsigned length, long long encodedDataLength, DataPayloadType dataPayloadType)
{
#if USE(QUICK_LOOK)
if (auto previewLoader = m_previewLoader.get()) {
if (previewLoader->didReceiveData(data, length))
return;
}
#endif
didReceiveDataOrBuffer(data, length, nullptr, encodedDataLength, dataPayloadType);
}
void SubresourceLoader::didReceiveBuffer(Ref<SharedBuffer>&& buffer, long long encodedDataLength, DataPayloadType dataPayloadType)
{
#if USE(QUICK_LOOK)
if (auto previewLoader = m_previewLoader.get()) {
if (previewLoader->didReceiveBuffer(buffer.get()))
return;
}
#endif
didReceiveDataOrBuffer(nullptr, 0, WTFMove(buffer), encodedDataLength, dataPayloadType);
}
void SubresourceLoader::didReceiveDataOrBuffer(const char* data, int length, RefPtr<SharedBuffer>&& buffer, long long encodedDataLength, DataPayloadType dataPayloadType)
{
ASSERT(m_resource);
if (m_resource->response().httpStatusCode() >= 400 && !m_resource->shouldIgnoreHTTPStatusCodeErrors())
return;
ASSERT(!m_resource->resourceToRevalidate());
ASSERT(!m_resource->errorOccurred());
ASSERT(m_state == Initialized);
// Reference the object in this method since the additional processing can do
// anything including removing the last reference to this object; one example of this is 3266216.
Ref<SubresourceLoader> protectedThis(*this);
ResourceLoader::didReceiveDataOrBuffer(data, length, buffer.copyRef(), encodedDataLength, dataPayloadType);
if (!m_loadingMultipartContent) {
if (auto* resourceData = this->resourceData())
m_resource->updateBuffer(*resourceData);
else
m_resource->updateData(buffer ? buffer->data() : data, buffer ? buffer->size() : length);
}
}
bool SubresourceLoader::checkForHTTPStatusCodeError()
{
if (m_resource->response().httpStatusCode() < 400 || m_resource->shouldIgnoreHTTPStatusCodeErrors())
return false;
m_state = Finishing;
m_resource->error(CachedResource::LoadError);
cancel();
return true;
}
static void logResourceLoaded(Frame* frame, CachedResource::Type type)
{
if (!frame || !frame->page())
return;
String resourceType;
switch (type) {
case CachedResource::MainResource:
resourceType = DiagnosticLoggingKeys::mainResourceKey();
break;
case CachedResource::ImageResource:
resourceType = DiagnosticLoggingKeys::imageKey();
break;
#if ENABLE(XSLT)
case CachedResource::XSLStyleSheet:
#endif
case CachedResource::CSSStyleSheet:
resourceType = DiagnosticLoggingKeys::styleSheetKey();
break;
case CachedResource::Script:
resourceType = DiagnosticLoggingKeys::scriptKey();
break;
case CachedResource::FontResource:
#if ENABLE(SVG_FONTS)
case CachedResource::SVGFontResource:
#endif
resourceType = DiagnosticLoggingKeys::fontKey();
break;
case CachedResource::Beacon:
ASSERT_NOT_REACHED();
break;
case CachedResource::MediaResource:
case CachedResource::Icon:
case CachedResource::RawResource:
resourceType = DiagnosticLoggingKeys::rawKey();
break;
case CachedResource::SVGDocumentResource:
resourceType = DiagnosticLoggingKeys::svgDocumentKey();
break;
#if ENABLE(APPLICATION_MANIFEST)
case CachedResource::ApplicationManifest:
resourceType = DiagnosticLoggingKeys::applicationManifestKey();
break;
#endif
case CachedResource::LinkPrefetch:
#if ENABLE(VIDEO_TRACK)
case CachedResource::TextTrackResource:
#endif
resourceType = DiagnosticLoggingKeys::otherKey();
break;
}
frame->page()->diagnosticLoggingClient().logDiagnosticMessage(DiagnosticLoggingKeys::resourceLoadedKey(), resourceType, ShouldSample::Yes);
}
bool SubresourceLoader::checkResponseCrossOriginAccessControl(const ResourceResponse& response, String& errorDescription)
{
if (!m_resource->isCrossOrigin() || options().mode != FetchOptions::Mode::Cors)
return true;
#if ENABLE(SERVICE_WORKER)
if (response.source() == ResourceResponse::Source::ServiceWorker)
return response.tainting() != ResourceResponse::Tainting::Opaque;
#endif
ASSERT(m_origin);
return passesAccessControlCheck(response, options().storedCredentialsPolicy, *m_origin, errorDescription);
}
bool SubresourceLoader::checkRedirectionCrossOriginAccessControl(const ResourceRequest& previousRequest, const ResourceResponse& redirectResponse, ResourceRequest& newRequest, String& errorMessage)
{
bool crossOriginFlag = m_resource->isCrossOrigin();
bool isNextRequestCrossOrigin = m_origin && !m_origin->canRequest(newRequest.url());
if (isNextRequestCrossOrigin)
m_resource->setCrossOrigin();
ASSERT(options().mode != FetchOptions::Mode::SameOrigin || !m_resource->isCrossOrigin());
if (options().mode != FetchOptions::Mode::Cors)
return true;
// Implementing https://fetch.spec.whatwg.org/#concept-http-redirect-fetch step 8 & 9.
if (m_resource->isCrossOrigin() && !isValidCrossOriginRedirectionURL(newRequest.url())) {
errorMessage = ASCIILiteral("URL is either a non-HTTP URL or contains credentials.");
return false;
}
ASSERT(m_origin);
if (crossOriginFlag && !passesAccessControlCheck(redirectResponse, options().storedCredentialsPolicy, *m_origin, errorMessage))
return false;
bool redirectingToNewOrigin = false;
if (m_resource->isCrossOrigin()) {
if (!crossOriginFlag && isNextRequestCrossOrigin)
redirectingToNewOrigin = true;
else
redirectingToNewOrigin = !protocolHostAndPortAreEqual(previousRequest.url(), newRequest.url());
}
// Implementing https://fetch.spec.whatwg.org/#concept-http-redirect-fetch step 10.
if (crossOriginFlag && redirectingToNewOrigin)
m_origin = SecurityOrigin::createUnique();
updateReferrerPolicy(redirectResponse.httpHeaderField(HTTPHeaderName::ReferrerPolicy));
if (redirectingToNewOrigin) {
cleanHTTPRequestHeadersForAccessControl(newRequest);
updateRequestForAccessControl(newRequest, *m_origin, options().storedCredentialsPolicy);
}
updateRequestReferrer(newRequest, referrerPolicy(), previousRequest.httpReferrer());
return true;
}
void SubresourceLoader::updateReferrerPolicy(const String& referrerPolicyValue)
{
if (referrerPolicyValue.isEmpty())
return;
// Implementing https://www.w3.org/TR/2017/CR-referrer-policy-20170126/#parse-referrer-policy-from-header.
ReferrerPolicy referrerPolicy = ReferrerPolicy::EmptyString;
for (auto tokenView : StringView { referrerPolicyValue }.split(',')) {
auto token = parseReferrerPolicy(stripLeadingAndTrailingHTTPSpaces(tokenView), ShouldParseLegacyKeywords::No);
if (token && token.value() != ReferrerPolicy::EmptyString)
referrerPolicy = token.value();
}
if (referrerPolicy != ReferrerPolicy::EmptyString)
setReferrerPolicy(referrerPolicy);
}
void SubresourceLoader::didFinishLoading(const NetworkLoadMetrics& networkLoadMetrics)
{
#if USE(QUICK_LOOK)
if (auto previewLoader = m_previewLoader.get()) {
if (previewLoader->didFinishLoading())
return;
}
#endif
if (m_state != Initialized)
return;
ASSERT(!reachedTerminalState());
ASSERT(!m_resource->resourceToRevalidate());
// FIXME (129394): We should cancel the load when a decode error occurs instead of continuing the load to completion.
ASSERT(!m_resource->errorOccurred() || m_resource->status() == CachedResource::DecodeError || !m_resource->isLoading());
LOG(ResourceLoading, "Received '%s'.", m_resource->url().string().latin1().data());
logResourceLoaded(m_frame.get(), m_resource->type());
Ref<SubresourceLoader> protectedThis(*this);
CachedResourceHandle<CachedResource> protectResource(m_resource);
// FIXME: Remove this with deprecatedNetworkLoadMetrics.
m_loadTiming.setResponseEnd(MonotonicTime::now());
if (networkLoadMetrics.isComplete())
reportResourceTiming(networkLoadMetrics);
else {
// This is the legacy path for platforms (and ResourceHandle paths) that do not provide
// complete load metrics in didFinishLoad. In those cases, fall back to the possibility
// that they populated partial load timing information on the ResourceResponse.
reportResourceTiming(m_resource->response().deprecatedNetworkLoadMetrics());
}
if (m_resource->type() != CachedResource::MainResource)
tracePoint(SubresourceLoadDidEnd);
m_state = Finishing;
m_resource->finishLoading(resourceData());
if (wasCancelled())
return;
m_resource->finish();
ASSERT(!reachedTerminalState());
didFinishLoadingOnePart(networkLoadMetrics);
notifyDone();
if (reachedTerminalState())
return;
releaseResources();
}
void SubresourceLoader::didFail(const ResourceError& error)
{
if (m_frame && m_frame->document() && error.isAccessControl())
m_frame->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, error.localizedDescription());
#if USE(QUICK_LOOK)
if (auto previewLoader = m_previewLoader.get())
previewLoader->didFail();
#endif
if (m_state != Initialized)
return;
ASSERT(!reachedTerminalState());
LOG(ResourceLoading, "Failed to load '%s'.\n", m_resource->url().string().latin1().data());
Ref<SubresourceLoader> protectedThis(*this);
CachedResourceHandle<CachedResource> protectResource(m_resource);
m_state = Finishing;
if (m_resource->type() != CachedResource::MainResource)
tracePoint(SubresourceLoadDidEnd);
if (m_resource->resourceToRevalidate())
MemoryCache::singleton().revalidationFailed(*m_resource);
m_resource->setResourceError(error);
if (!m_resource->isPreloaded())
MemoryCache::singleton().remove(*m_resource);
m_resource->error(CachedResource::LoadError);
cleanupForError(error);
notifyDone();
if (reachedTerminalState())
return;
releaseResources();
}
void SubresourceLoader::willCancel(const ResourceError& error)
{
#if PLATFORM(IOS)
// Since we defer initialization to scheduling time on iOS but
// CachedResourceLoader stores resources in the memory cache immediately,
// m_resource might be cached despite its loader not being initialized.
if (m_state != Initialized && m_state != Uninitialized)
#else
if (m_state != Initialized)
#endif
return;
ASSERT(!reachedTerminalState());
LOG(ResourceLoading, "Cancelled load of '%s'.\n", m_resource->url().string().latin1().data());
Ref<SubresourceLoader> protectedThis(*this);
#if PLATFORM(IOS)
m_state = m_state == Uninitialized ? CancelledWhileInitializing : Finishing;
#else
m_state = Finishing;
#endif
auto& memoryCache = MemoryCache::singleton();
if (m_resource->resourceToRevalidate())
memoryCache.revalidationFailed(*m_resource);
m_resource->setResourceError(error);
memoryCache.remove(*m_resource);
}
void SubresourceLoader::didCancel(const ResourceError&)
{
if (m_state == Uninitialized)
return;
if (m_resource->type() != CachedResource::MainResource)
tracePoint(SubresourceLoadDidEnd);
m_resource->cancelLoad();
notifyDone();
}
void SubresourceLoader::didRetrieveDerivedDataFromCache(const String& type, SharedBuffer& buffer)
{
if (m_state != Initialized)
return;
m_resource->didRetrieveDerivedDataFromCache(type, buffer);
}
void SubresourceLoader::notifyDone()
{
if (reachedTerminalState())
return;
m_requestCountTracker = std::nullopt;
#if PLATFORM(IOS)
m_documentLoader->cachedResourceLoader().loadDone(m_state != CancelledWhileInitializing);
#else
m_documentLoader->cachedResourceLoader().loadDone();
#endif
if (reachedTerminalState())
return;
m_documentLoader->removeSubresourceLoader(this);
}
void SubresourceLoader::releaseResources()
{
ASSERT(!reachedTerminalState());
#if PLATFORM(IOS)
if (m_state != Uninitialized && m_state != CancelledWhileInitializing)
#else
if (m_state != Uninitialized)
#endif
m_resource->clearLoader();
m_resource = nullptr;
ResourceLoader::releaseResources();
}
void SubresourceLoader::reportResourceTiming(const NetworkLoadMetrics& networkLoadMetrics)
{
if (!RuntimeEnabledFeatures::sharedFeatures().resourceTimingEnabled())
return;
if (!ResourceTimingInformation::shouldAddResourceTiming(*m_resource))
return;
Document* document = m_documentLoader->cachedResourceLoader().document();
if (!document)
return;
SecurityOrigin& origin = m_origin ? *m_origin : document->securityOrigin();
auto resourceTiming = ResourceTiming::fromLoad(*m_resource, m_resource->initiatorName(), m_loadTiming, networkLoadMetrics, origin);
// Worker resources loaded here are all CachedRawResources loaded through WorkerThreadableLoader.
// Pass the ResourceTiming information on so that WorkerThreadableLoader may add them to the
// Worker's Performance object.
if (options().initiatorContext == InitiatorContext::Worker) {
ASSERT(m_origin);
ASSERT(is<CachedRawResource>(m_resource));
downcast<CachedRawResource>(*m_resource).finishedTimingForWorkerLoad(WTFMove(resourceTiming));
return;
}
ASSERT(options().initiatorContext == InitiatorContext::Document);
m_documentLoader->cachedResourceLoader().resourceTimingInformation().addResourceTiming(*m_resource, *document, WTFMove(resourceTiming));
}
const HTTPHeaderMap* SubresourceLoader::originalHeaders() const
{
return (m_resource && m_resource->originalRequest()) ? &m_resource->originalRequest()->httpHeaderFields() : nullptr;
}
}