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DocumentThreadableLoader.cpp
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788 lines (656 loc) · 35.5 KB
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/*
* Copyright (C) 2011, 2012 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER 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 "DocumentThreadableLoader.h"
#include "CachedRawResource.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "CachedResourceRequestInitiatorTypes.h"
#include "CrossOriginAccessControl.h"
#include "CrossOriginPreflightChecker.h"
#include "CrossOriginPreflightResultCache.h"
#include "DocumentInlines.h"
#include "DocumentLoader.h"
#include "FrameDestructionObserverInlines.h"
#include "FrameLoader.h"
#include "InspectorInstrumentation.h"
#include "InspectorNetworkAgent.h"
#include "LegacySchemeRegistry.h"
#include "LoaderStrategy.h"
#include "LocalDOMWindow.h"
#include "LocalFrame.h"
#include "MixedContentChecker.h"
#include "OriginAccessPatterns.h"
#include "Performance.h"
#include "PlatformStrategies.h"
#include "ProgressTracker.h"
#include "ResourceError.h"
#include "ResourceRequest.h"
#include "ResourceTiming.h"
#include "RuntimeApplicationChecks.h"
#include "SecurityOrigin.h"
#include "Settings.h"
#include "SharedBuffer.h"
#include "SubresourceIntegrity.h"
#include "SubresourceLoader.h"
#include "ThreadableLoaderClient.h"
#include <wtf/Assertions.h>
#include <wtf/Ref.h>
#if PLATFORM(IOS_FAMILY)
#include <wtf/cocoa/RuntimeApplicationChecksCocoa.h>
#endif
namespace WebCore {
void DocumentThreadableLoader::loadResourceSynchronously(Document& document, ResourceRequest&& request, ThreadableLoaderClient& client, const ThreadableLoaderOptions& options, RefPtr<SecurityOrigin>&& origin, std::unique_ptr<ContentSecurityPolicy>&& contentSecurityPolicy, std::optional<CrossOriginEmbedderPolicy>&& crossOriginEmbedderPolicy)
{
// The loader will be deleted as soon as this function exits.
Ref loader = adoptRef(*new DocumentThreadableLoader(document, client, LoadSynchronously, WTFMove(request), options, WTFMove(origin), WTFMove(contentSecurityPolicy), WTFMove(crossOriginEmbedderPolicy), String(), ShouldLogError::Yes));
ASSERT(loader->hasOneRef());
}
void DocumentThreadableLoader::loadResourceSynchronously(Document& document, ResourceRequest&& request, ThreadableLoaderClient& client, const ThreadableLoaderOptions& options)
{
loadResourceSynchronously(document, WTFMove(request), client, options, nullptr, nullptr, std::nullopt);
}
RefPtr<DocumentThreadableLoader> DocumentThreadableLoader::create(Document& document, ThreadableLoaderClient& client,
ResourceRequest&& request, const ThreadableLoaderOptions& options, RefPtr<SecurityOrigin>&& origin,
std::unique_ptr<ContentSecurityPolicy>&& contentSecurityPolicy, std::optional<CrossOriginEmbedderPolicy>&& crossOriginEmbedderPolicy, String&& referrer, ShouldLogError shouldLogError)
{
RefPtr loader = adoptRef(new DocumentThreadableLoader(document, client, LoadAsynchronously, WTFMove(request), options, WTFMove(origin), WTFMove(contentSecurityPolicy), WTFMove(crossOriginEmbedderPolicy), WTFMove(referrer), shouldLogError));
if (!loader->isLoading())
loader = nullptr;
return loader;
}
RefPtr<DocumentThreadableLoader> DocumentThreadableLoader::create(Document& document, ThreadableLoaderClient& client, ResourceRequest&& request, const ThreadableLoaderOptions& options, String&& referrer)
{
return create(document, client, WTFMove(request), options, nullptr, nullptr, std::nullopt, WTFMove(referrer), ShouldLogError::Yes);
}
static inline bool shouldPerformSecurityChecks()
{
return platformStrategies()->loaderStrategy()->shouldPerformSecurityChecks();
}
bool DocumentThreadableLoader::shouldSetHTTPHeadersToKeep() const
{
if (m_options.mode == FetchOptions::Mode::Cors && shouldPerformSecurityChecks())
return true;
if (m_options.serviceWorkersMode == ServiceWorkersMode::All && m_async)
return m_options.serviceWorkerRegistrationIdentifier || m_document->activeServiceWorker();
return false;
}
DocumentThreadableLoader::DocumentThreadableLoader(Document& document, ThreadableLoaderClient& client, BlockingBehavior blockingBehavior, ResourceRequest&& request, const ThreadableLoaderOptions& options, RefPtr<SecurityOrigin>&& origin, std::unique_ptr<ContentSecurityPolicy>&& contentSecurityPolicy, std::optional<CrossOriginEmbedderPolicy>&& crossOriginEmbedderPolicy, String&& referrer, ShouldLogError shouldLogError)
: m_client(&client)
, m_document(document)
, m_options(options)
, m_origin(WTFMove(origin))
, m_referrer(WTFMove(referrer))
, m_sameOriginRequest(securityOrigin().canRequest(request.url(), OriginAccessPatternsForWebProcess::singleton()))
, m_simpleRequest(true)
, m_async(blockingBehavior == LoadAsynchronously)
, m_delayCallbacksForIntegrityCheck(!m_options.integrity.isEmpty())
, m_contentSecurityPolicy(WTFMove(contentSecurityPolicy))
, m_crossOriginEmbedderPolicy(WTFMove(crossOriginEmbedderPolicy))
, m_shouldLogError(shouldLogError)
{
relaxAdoptionRequirement();
// Setting a referrer header is only supported in the async code path.
ASSERT(m_async || m_referrer.isEmpty());
if (document.settings().disallowSyncXHRDuringPageDismissalEnabled() && !m_async && (!document.page() || !document.page()->areSynchronousLoadsAllowed())) {
document.didRejectSyncXHRDuringPageDismissal();
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, request.url(), "Synchronous loads are not allowed at this time"_s));
return;
}
// Referrer and Origin headers should be set after the preflight if any.
ASSERT(!request.hasHTTPReferrer() && !request.hasHTTPOrigin());
ASSERT_WITH_SECURITY_IMPLICATION(isAllowedByContentSecurityPolicy(request.url(), ContentSecurityPolicy::RedirectResponseReceived::No));
m_options.storedCredentialsPolicy = (m_options.credentials == FetchOptions::Credentials::Include || (m_options.credentials == FetchOptions::Credentials::SameOrigin && m_sameOriginRequest)) ? StoredCredentialsPolicy::Use : StoredCredentialsPolicy::DoNotUse;
ASSERT(!request.httpHeaderFields().contains(HTTPHeaderName::Origin));
// Copy headers if we need to replay the request after a redirection.
if (m_options.mode == FetchOptions::Mode::Cors)
m_originalHeaders = request.httpHeaderFields();
if (shouldSetHTTPHeadersToKeep())
m_options.httpHeadersToKeep = httpHeadersToKeepFromCleaning(request.httpHeaderFields());
bool shouldDisableCORS = document.isRunningUserScripts() && LegacySchemeRegistry::isUserExtensionScheme(request.url().protocol());
if (RefPtr page = document.page())
shouldDisableCORS |= page->shouldDisableCorsForRequestTo(request.url());
if (shouldDisableCORS) {
m_options.mode = FetchOptions::Mode::NoCors;
m_options.filteringPolicy = ResponseFilteringPolicy::Disable;
m_responsesCanBeOpaque = false;
}
m_options.cspResponseHeaders = m_options.contentSecurityPolicyEnforcement != ContentSecurityPolicyEnforcement::DoNotEnforce ? checkedContentSecurityPolicy()->responseHeaders() : ContentSecurityPolicyResponseHeaders { };
m_options.crossOriginEmbedderPolicy = this->crossOriginEmbedderPolicy();
// As per step 11 of https://fetch.spec.whatwg.org/#main-fetch, data scheme (if same-origin data-URL flag is set) and about scheme are considered same-origin.
if (request.url().protocolIsData())
m_sameOriginRequest = options.sameOriginDataURLFlag == SameOriginDataURLFlag::Set;
if (m_sameOriginRequest || m_options.mode == FetchOptions::Mode::NoCors || m_options.mode == FetchOptions::Mode::Navigate) {
loadRequest(WTFMove(request), SecurityCheckPolicy::DoSecurityCheck);
return;
}
if (m_options.mode == FetchOptions::Mode::SameOrigin) {
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, request.url(), "Cross origin requests are not allowed when using same-origin fetch mode."_s));
return;
}
makeCrossOriginAccessRequest(WTFMove(request));
}
bool DocumentThreadableLoader::checkURLSchemeAsCORSEnabled(const URL& url)
{
// Cross-origin requests are only allowed for HTTP and registered schemes. We would catch this when checking response headers later, but there is no reason to send a request that's guaranteed to be denied.
if (!LegacySchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(url.protocol())) {
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, url, "Cross origin requests are only supported for HTTP."_s, ResourceError::Type::AccessControl));
return false;
}
return true;
}
void DocumentThreadableLoader::makeCrossOriginAccessRequest(ResourceRequest&& request)
{
ASSERT(m_options.mode == FetchOptions::Mode::Cors);
#if PLATFORM(IOS_FAMILY)
bool needsPreflightQuirk = IOSApplication::isMoviStarPlus() && !linkedOnOrAfterSDKWithBehavior(SDKAlignedBehavior::NoMoviStarPlusCORSPreflightQuirk) && (m_options.preflightPolicy == PreflightPolicy::Consider || m_options.preflightPolicy == PreflightPolicy::Force);
#else
bool needsPreflightQuirk = false;
#endif
if ((m_options.preflightPolicy == PreflightPolicy::Consider && isSimpleCrossOriginAccessRequest(request.httpMethod(), request.httpHeaderFields())) || m_options.preflightPolicy == PreflightPolicy::Prevent || (shouldPerformSecurityChecks() && !needsPreflightQuirk)) {
if (checkURLSchemeAsCORSEnabled(request.url()))
makeSimpleCrossOriginAccessRequest(WTFMove(request));
} else {
if (m_options.serviceWorkersMode == ServiceWorkersMode::All && m_async) {
if (m_options.serviceWorkerRegistrationIdentifier || document().activeServiceWorker()) {
ASSERT(!m_bypassingPreflightForServiceWorkerRequest);
m_bypassingPreflightForServiceWorkerRequest = WTFMove(request);
m_options.serviceWorkersMode = ServiceWorkersMode::Only;
loadRequest(ResourceRequest { m_bypassingPreflightForServiceWorkerRequest.value() }, SecurityCheckPolicy::SkipSecurityCheck);
return;
}
}
if (!needsPreflightQuirk && !checkURLSchemeAsCORSEnabled(request.url()))
return;
m_simpleRequest = false;
if (RefPtr page = document().page(); page && CrossOriginPreflightResultCache::singleton().canSkipPreflight(page->sessionID(), securityOrigin().toString(), request.url(), m_options.storedCredentialsPolicy, request.httpMethod(), request.httpHeaderFields()))
preflightSuccess(WTFMove(request));
else
makeCrossOriginAccessRequestWithPreflight(WTFMove(request));
}
}
void DocumentThreadableLoader::makeSimpleCrossOriginAccessRequest(ResourceRequest&& request)
{
ASSERT(m_options.preflightPolicy != PreflightPolicy::Force || shouldPerformSecurityChecks());
ASSERT(m_options.preflightPolicy == PreflightPolicy::Prevent || isSimpleCrossOriginAccessRequest(request.httpMethod(), request.httpHeaderFields()) || shouldPerformSecurityChecks());
updateRequestForAccessControl(request, protectedSecurityOrigin(), m_options.storedCredentialsPolicy);
loadRequest(WTFMove(request), SecurityCheckPolicy::DoSecurityCheck);
}
void DocumentThreadableLoader::makeCrossOriginAccessRequestWithPreflight(ResourceRequest&& request)
{
if (m_async) {
m_preflightChecker.emplace(*this, WTFMove(request));
m_preflightChecker->startPreflight();
return;
}
CrossOriginPreflightChecker::doPreflight(*this, WTFMove(request));
}
DocumentThreadableLoader::~DocumentThreadableLoader()
{
if (CachedResourceHandle resource = m_resource)
resource->removeClient(*this);
}
void DocumentThreadableLoader::cancel()
{
Ref protectedThis { *this };
// Cancel can re-enter and m_resource might be null here as a result.
if (m_client && m_resource) {
// FIXME: This error is sent to the client in didFail(), so it should not be an internal one. Use LocalFrameLoaderClient::cancelledError() instead.
ResourceError error(errorDomainWebKitInternal, 0, m_resource->url(), "Load cancelled"_s, ResourceError::Type::Cancellation);
m_client->didFail(error); // May destroy the client.
}
clearResource();
m_client = nullptr;
}
void DocumentThreadableLoader::computeIsDone()
{
if (!m_async || m_preflightChecker || !m_resource) {
if (m_client)
m_client->notifyIsDone(m_async && !m_preflightChecker && !m_resource);
return;
}
platformStrategies()->loaderStrategy()->isResourceLoadFinished(*protectedResource(), [weakThis = WeakPtr { *this }](bool isDone) {
RefPtr protectedThis = weakThis.get();
if (protectedThis && protectedThis->m_client)
protectedThis->m_client->notifyIsDone(isDone);
});
}
CachedResourceHandle<CachedRawResource> DocumentThreadableLoader::protectedResource() const
{
return m_resource;
}
void DocumentThreadableLoader::setDefersLoading(bool value)
{
if (CachedResourceHandle resource = m_resource)
resource->setDefersLoading(value);
if (m_preflightChecker)
m_preflightChecker->setDefersLoading(value);
}
void DocumentThreadableLoader::clearResource()
{
// Script can cancel and restart a request reentrantly within removeClient(),
// which could lead to calling CachedResource::removeClient() multiple times for
// this DocumentThreadableLoader. Save off a copy of m_resource and clear it to
// prevent the reentrancy.
if (CachedResourceHandle resource = m_resource) {
m_resource = nullptr;
resource->removeClient(*this);
}
if (m_preflightChecker)
m_preflightChecker = std::nullopt;
}
void DocumentThreadableLoader::redirectReceived(CachedResource& resource, ResourceRequest&& request, const ResourceResponse& redirectResponse, CompletionHandler<void(ResourceRequest&&)>&& completionHandler)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, &resource == m_resource);
Ref protectedThis { *this };
--m_options.maxRedirectCount;
m_responseURL = request.url();
// FIXME: We restrict this check to Fetch API for the moment, as this might disrupt WorkerScriptLoader.
// Reassess this check based on https://github.com/whatwg/fetch/issues/393 discussions.
// We should also disable that check in navigation mode.
if (!request.url().protocolIsInHTTPFamily() && m_options.initiatorType == cachedResourceRequestInitiatorTypes().fetch) {
reportRedirectionWithBadScheme(request.url());
clearResource();
return completionHandler(WTFMove(request));
}
if (platformStrategies()->loaderStrategy()->havePerformedSecurityChecks(redirectResponse)) {
completionHandler(WTFMove(request));
return;
}
if (!isAllowedByContentSecurityPolicy(request.url(), redirectResponse.isNull() ? ContentSecurityPolicy::RedirectResponseReceived::No : ContentSecurityPolicy::RedirectResponseReceived::Yes, redirectResponse.url())) {
reportContentSecurityPolicyError(redirectResponse.url());
clearResource();
return completionHandler(WTFMove(request));
}
// Allow same origin requests to continue after allowing clients to audit the redirect.
if (isAllowedRedirect(request.url()))
return completionHandler(WTFMove(request));
// Force any subsequent request to use these checks.
m_sameOriginRequest = false;
ASSERT(m_resource);
ASSERT(m_originalHeaders);
// Use a unique for subsequent loads if needed.
// https://fetch.spec.whatwg.org/#concept-http-redirect-fetch (Step 10).
ASSERT(m_options.mode == FetchOptions::Mode::Cors);
if (!protectedSecurityOrigin()->canRequest(redirectResponse.url(), OriginAccessPatternsForWebProcess::singleton()) && !protocolHostAndPortAreEqual(redirectResponse.url(), request.url()))
m_origin = SecurityOrigin::createOpaque();
// Except in case where preflight is needed, loading should be able to continue on its own.
// But we also handle credentials here if it is restricted to SameOrigin.
if (m_options.credentials != FetchOptions::Credentials::SameOrigin && m_simpleRequest && isSimpleCrossOriginAccessRequest(request.httpMethod(), *m_originalHeaders))
return completionHandler(WTFMove(request));
if (m_options.credentials == FetchOptions::Credentials::SameOrigin)
m_options.storedCredentialsPolicy = StoredCredentialsPolicy::DoNotUse;
clearResource();
m_referrer = request.httpReferrer();
if (m_referrer.isNull())
m_options.referrerPolicy = ReferrerPolicy::NoReferrer;
// Let's fetch the request with the original headers (equivalent to request cloning specified by fetch algorithm).
// Do not copy the Authorization header if removed by the network layer.
if (!request.httpHeaderFields().contains(HTTPHeaderName::Authorization))
m_originalHeaders->remove(HTTPHeaderName::Authorization);
request.setHTTPHeaderFields(*m_originalHeaders);
if (redirectResponse.source() != ResourceResponse::Source::ServiceWorker && redirectResponse.source() != ResourceResponse::Source::MemoryCache)
m_options.serviceWorkersMode = ServiceWorkersMode::None;
makeCrossOriginAccessRequest(ResourceRequest(request));
completionHandler(WTFMove(request));
}
void DocumentThreadableLoader::dataSent(CachedResource& resource, unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, &resource == m_resource);
m_client->didSendData(bytesSent, totalBytesToBeSent);
}
void DocumentThreadableLoader::responseReceived(CachedResource& resource, const ResourceResponse& response, CompletionHandler<void()>&& completionHandler)
{
ASSERT_UNUSED(resource, &resource == m_resource);
ResourceResponse responseWithCorrectFragmentIdentifier;
if (response.source() != ResourceResponse::Source::ServiceWorker && response.url().fragmentIdentifier() != m_responseURL.fragmentIdentifier()) {
responseWithCorrectFragmentIdentifier = response;
responseWithCorrectFragmentIdentifier.setURL(m_responseURL);
}
if (!m_responsesCanBeOpaque) {
ResourceResponse responseWithoutTainting = responseWithCorrectFragmentIdentifier.isNull() ? response : responseWithCorrectFragmentIdentifier;
responseWithoutTainting.setTainting(ResourceResponse::Tainting::Basic);
didReceiveResponse(m_resource->identifier(), responseWithoutTainting);
} else
didReceiveResponse(m_resource->identifier(), responseWithCorrectFragmentIdentifier.isNull() ? response : responseWithCorrectFragmentIdentifier);
if (completionHandler)
completionHandler();
}
void DocumentThreadableLoader::didReceiveResponse(ResourceLoaderIdentifier identifier, const ResourceResponse& response)
{
ASSERT(m_client);
ASSERT(response.type() != ResourceResponse::Type::Error);
// https://fetch.spec.whatwg.org/commit-snapshots/6257e220d70f560a037e46f1b4206325400db8dc/#main-fetch step 17.
if (response.source() == ResourceResponse::Source::ServiceWorker && response.url() != m_resource->url()) {
if (!isResponseAllowedByContentSecurityPolicy(response)) {
reportContentSecurityPolicyError(response.url());
return;
}
}
InspectorInstrumentation::didReceiveThreadableLoaderResponse(*this, identifier);
if (m_delayCallbacksForIntegrityCheck)
return;
if (options().filteringPolicy == ResponseFilteringPolicy::Disable) {
m_client->didReceiveResponse(identifier, response);
return;
}
if (response.type() == ResourceResponse::Type::Default) {
m_client->didReceiveResponse(identifier, ResourceResponse::filter(response, m_options.credentials == FetchOptions::Credentials::Include ? ResourceResponse::PerformExposeAllHeadersCheck::No : ResourceResponse::PerformExposeAllHeadersCheck::Yes));
if (response.tainting() == ResourceResponse::Tainting::Opaque) {
clearResource();
if (m_client)
m_client->didFinishLoading(identifier, { });
}
return;
}
ASSERT(response.type() == ResourceResponse::Type::Opaqueredirect || response.source() == ResourceResponse::Source::ServiceWorker || response.source() == ResourceResponse::Source::MemoryCache);
m_client->didReceiveResponse(identifier, response);
}
void DocumentThreadableLoader::dataReceived(CachedResource& resource, const SharedBuffer& buffer)
{
ASSERT_UNUSED(resource, &resource == m_resource);
didReceiveData(m_resource->identifier(), buffer);
}
void DocumentThreadableLoader::didReceiveData(ResourceLoaderIdentifier, const SharedBuffer& buffer)
{
ASSERT(m_client);
if (m_delayCallbacksForIntegrityCheck)
return;
m_client->didReceiveData(buffer);
}
void DocumentThreadableLoader::finishedTimingForWorkerLoad(CachedResource& resource, const ResourceTiming& resourceTiming)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, &resource == m_resource);
finishedTimingForWorkerLoad(resourceTiming);
}
void DocumentThreadableLoader::finishedTimingForWorkerLoad(const ResourceTiming& resourceTiming)
{
ASSERT(m_options.initiatorContext == InitiatorContext::Worker);
m_client->didFinishTiming(resourceTiming);
}
void DocumentThreadableLoader::notifyFinished(CachedResource& resource, const NetworkLoadMetrics& metrics, LoadWillContinueInAnotherProcess)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, &resource == m_resource);
if (m_resource->errorOccurred())
didFail(m_resource->identifier(), m_resource->resourceError());
else
didFinishLoading(m_resource->identifier(), metrics);
}
void DocumentThreadableLoader::didFinishLoading(ResourceLoaderIdentifier identifier, const NetworkLoadMetrics& metrics)
{
ASSERT(m_client);
if (m_delayCallbacksForIntegrityCheck) {
CachedResourceHandle resource = m_resource;
if (!matchIntegrityMetadata(*resource, m_options.integrity)) {
reportIntegrityMetadataError(*resource, m_options.integrity);
return;
}
auto response = resource->response();
RefPtr<SharedBuffer> buffer;
if (resource->resourceBuffer())
buffer = resource->resourceBuffer()->makeContiguous();
if (options().filteringPolicy == ResponseFilteringPolicy::Disable) {
m_client->didReceiveResponse(identifier, response);
if (buffer)
m_client->didReceiveData(*buffer);
} else {
ASSERT(response.type() == ResourceResponse::Type::Default);
m_client->didReceiveResponse(identifier, ResourceResponse::filter(response, m_options.credentials == FetchOptions::Credentials::Include ? ResourceResponse::PerformExposeAllHeadersCheck::No : ResourceResponse::PerformExposeAllHeadersCheck::Yes));
if (buffer)
m_client->didReceiveData(*buffer);
}
}
m_client->didFinishLoading(identifier, metrics);
}
void DocumentThreadableLoader::didFail(ResourceLoaderIdentifier, const ResourceError& error)
{
ASSERT(m_client);
if (m_bypassingPreflightForServiceWorkerRequest && error.isCancellation()) {
clearResource();
m_options.serviceWorkersMode = ServiceWorkersMode::None;
makeCrossOriginAccessRequestWithPreflight(WTFMove(m_bypassingPreflightForServiceWorkerRequest.value()));
ASSERT(m_bypassingPreflightForServiceWorkerRequest->isNull());
m_bypassingPreflightForServiceWorkerRequest = std::nullopt;
return;
}
if (m_shouldLogError == ShouldLogError::Yes)
logError(protectedDocument(), error, m_options.initiatorType);
if (m_client)
m_client->didFail(error); // May cause the client to get destroyed.
}
Ref<Document> DocumentThreadableLoader::protectedDocument()
{
return *m_document;
}
void DocumentThreadableLoader::preflightSuccess(ResourceRequest&& request)
{
ResourceRequest actualRequest(WTFMove(request));
updateRequestForAccessControl(actualRequest, protectedSecurityOrigin(), m_options.storedCredentialsPolicy);
m_preflightChecker = std::nullopt;
// It should be ok to skip the security check since we already asked about the preflight request.
loadRequest(WTFMove(actualRequest), SecurityCheckPolicy::SkipSecurityCheck);
}
void DocumentThreadableLoader::preflightFailure(ResourceLoaderIdentifier identifier, const ResourceError& error)
{
m_preflightChecker = std::nullopt;
RefPtr frame = m_document->frame();
InspectorInstrumentation::didFailLoading(frame.get(), frame->loader().protectedDocumentLoader().get(), identifier, error);
if (m_shouldLogError == ShouldLogError::Yes)
logError(protectedDocument(), error, m_options.initiatorType);
m_client->didFail(error);
}
void DocumentThreadableLoader::loadRequest(ResourceRequest&& request, SecurityCheckPolicy securityCheck)
{
Ref<DocumentThreadableLoader> protectedThis(*this);
// Any credential should have been removed from the cross-site requests.
m_responseURL = request.url();
const URL& requestURL = request.url();
m_options.securityCheck = securityCheck;
ASSERT(m_sameOriginRequest || !requestURL.hasCredentials());
if (!m_referrer.isNull())
request.setHTTPReferrer(m_referrer);
if (m_async) {
ResourceLoaderOptions options = m_options;
options.clientCredentialPolicy = m_sameOriginRequest ? ClientCredentialPolicy::MayAskClientForCredentials : ClientCredentialPolicy::CannotAskClientForCredentials;
options.contentSecurityPolicyImposition = ContentSecurityPolicyImposition::SkipPolicyCheck;
// If there is integrity metadata to validate, we must buffer.
if (!m_options.integrity.isEmpty())
options.dataBufferingPolicy = DataBufferingPolicy::BufferData;
request.setAllowCookies(m_options.storedCredentialsPolicy == StoredCredentialsPolicy::Use);
CachedResourceRequest newRequest(WTFMove(request), options);
newRequest.setInitiatorType(AtomString { m_options.initiatorType });
newRequest.setOrigin(protectedSecurityOrigin());
ASSERT(!m_resource);
if (CachedResourceHandle resource = std::exchange(m_resource, nullptr))
resource->removeClient(*this);
auto cachedResource = m_document->protectedCachedResourceLoader()->requestRawResource(WTFMove(newRequest));
m_resource = cachedResource.value_or(nullptr);
if (CachedResourceHandle resource = m_resource)
resource->addClient(*this);
else
logErrorAndFail(cachedResource.error());
return;
}
// If credentials mode is 'Omit', we should disable cookie sending.
ASSERT(m_options.credentials != FetchOptions::Credentials::Omit);
ResourceLoadTiming loadTiming;
loadTiming.markStartTime();
// FIXME: ThreadableLoaderOptions.sniffContent is not supported for synchronous requests.
RefPtr<SharedBuffer> data;
ResourceError error;
ResourceResponse response;
auto identifier = AtomicObjectIdentifier<ResourceLoader> { std::numeric_limits<uint64_t>::max() };
if (RefPtr frame = m_document->frame()) {
if (MixedContentChecker::shouldBlockRequestForRunnableContent(*frame, m_document->protectedSecurityOrigin(), requestURL, MixedContentChecker::ShouldLogWarning::Yes))
return;
CheckedRef frameLoader = frame->loader();
identifier = frameLoader->loadResourceSynchronously(request, m_options.clientCredentialPolicy, m_options, *m_originalHeaders, error, response, data);
}
loadTiming.markEndTime();
if (!error.isNull() && response.httpStatusCode() <= 0) {
if (requestURL.protocolIsFile()) {
// We don't want XMLHttpRequest to raise an exception for file:// resources, see <rdar://problem/4962298>.
// FIXME: XMLHttpRequest quirks should be in XMLHttpRequest code, not in DocumentThreadableLoader.cpp.
didReceiveResponse(identifier, response);
didFinishLoading(identifier, { });
return;
}
logErrorAndFail(error);
return;
}
if (response.containsInvalidHTTPHeaders()) {
didFail(identifier, badResponseHeadersError(request.url()));
return;
}
if (!shouldPerformSecurityChecks()) {
// FIXME: FrameLoader::loadSynchronously() does not tell us whether a redirect happened or not, so we guess by comparing the
// request and response URLs. This isn't a perfect test though, since a server can serve a redirect to the same URL that was
// requested. Also comparing the request and response URLs as strings will fail if the requestURL still has its credentials.
bool didRedirect = requestURL != response.url();
if (didRedirect) {
if (!isAllowedByContentSecurityPolicy(response.url(), ContentSecurityPolicy::RedirectResponseReceived::Yes)) {
reportContentSecurityPolicyError(requestURL);
return;
}
if (!isAllowedRedirect(response.url())) {
reportCrossOriginResourceSharingError(requestURL);
return;
}
}
if (!m_sameOriginRequest) {
if (m_options.mode == FetchOptions::Mode::NoCors)
response.setTainting(ResourceResponse::Tainting::Opaque);
else {
ASSERT(m_options.mode == FetchOptions::Mode::Cors);
response.setTainting(ResourceResponse::Tainting::Cors);
auto accessControlCheckResult = passesAccessControlCheck(response, m_options.storedCredentialsPolicy, protectedSecurityOrigin(), &CrossOriginAccessControlCheckDisabler::singleton());
if (!accessControlCheckResult) {
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, response.url(), accessControlCheckResult.error(), ResourceError::Type::AccessControl));
return;
}
}
}
}
didReceiveResponse(identifier, response);
if (data)
didReceiveData(identifier, *data);
const auto* timing = response.deprecatedNetworkLoadMetricsOrNull();
auto resourceTiming = ResourceTiming::fromSynchronousLoad(requestURL, m_options.initiatorType, loadTiming, timing ? *timing : NetworkLoadMetrics::emptyMetrics(), response, securityOrigin());
if (options().initiatorContext == InitiatorContext::Worker)
finishedTimingForWorkerLoad(resourceTiming);
else {
if (RefPtr window = document().domWindow())
window->protectedPerformance()->addResourceTiming(WTFMove(resourceTiming));
}
didFinishLoading(identifier, { });
}
bool DocumentThreadableLoader::isAllowedByContentSecurityPolicy(const URL& url, ContentSecurityPolicy::RedirectResponseReceived redirectResponseReceived, const URL& preRedirectURL)
{
switch (m_options.contentSecurityPolicyEnforcement) {
case ContentSecurityPolicyEnforcement::DoNotEnforce:
return true;
case ContentSecurityPolicyEnforcement::EnforceWorkerSrcDirective:
return checkedContentSecurityPolicy()->allowWorkerFromSource(url, redirectResponseReceived, preRedirectURL);
case ContentSecurityPolicyEnforcement::EnforceConnectSrcDirective:
return checkedContentSecurityPolicy()->allowConnectToSource(url, redirectResponseReceived, preRedirectURL);
case ContentSecurityPolicyEnforcement::EnforceScriptSrcDirective:
return checkedContentSecurityPolicy()->allowScriptFromSource(url, redirectResponseReceived, preRedirectURL, m_options.integrity, m_options.nonce);
}
ASSERT_NOT_REACHED();
return false;
}
bool DocumentThreadableLoader::isResponseAllowedByContentSecurityPolicy(const ResourceResponse& response)
{
return isAllowedByContentSecurityPolicy(response.url(), ContentSecurityPolicy::RedirectResponseReceived::Yes, { });
}
bool DocumentThreadableLoader::isAllowedRedirect(const URL& url)
{
if (m_options.mode == FetchOptions::Mode::NoCors)
return true;
return m_sameOriginRequest && protectedSecurityOrigin()->canRequest(url, OriginAccessPatternsForWebProcess::singleton());
}
SecurityOrigin& DocumentThreadableLoader::securityOrigin() const
{
return m_origin ? *m_origin : m_document->securityOrigin();
}
Ref<SecurityOrigin> DocumentThreadableLoader::protectedSecurityOrigin() const
{
return securityOrigin();
}
const ContentSecurityPolicy& DocumentThreadableLoader::contentSecurityPolicy() const
{
if (m_contentSecurityPolicy)
return *m_contentSecurityPolicy.get();
ASSERT(m_document->contentSecurityPolicy());
return *m_document->contentSecurityPolicy();
}
CheckedRef<const ContentSecurityPolicy> DocumentThreadableLoader::checkedContentSecurityPolicy() const
{
return contentSecurityPolicy();
}
const CrossOriginEmbedderPolicy& DocumentThreadableLoader::crossOriginEmbedderPolicy() const
{
if (m_crossOriginEmbedderPolicy)
return *m_crossOriginEmbedderPolicy;
return m_document->crossOriginEmbedderPolicy();
}
void DocumentThreadableLoader::reportRedirectionWithBadScheme(const URL& url)
{
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, url, "Redirection to URL with a scheme that is not HTTP(S)."_s, ResourceError::Type::AccessControl));
}
void DocumentThreadableLoader::reportContentSecurityPolicyError(const URL& url)
{
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, url, "Blocked by Content Security Policy."_s, ResourceError::Type::AccessControl));
}
void DocumentThreadableLoader::reportCrossOriginResourceSharingError(const URL& url)
{
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, url, "Cross-origin redirection denied by Cross-Origin Resource Sharing policy."_s, ResourceError::Type::AccessControl));
}
void DocumentThreadableLoader::reportIntegrityMetadataError(const CachedResource& resource, const String& expectedMetadata)
{
logErrorAndFail(ResourceError(errorDomainWebKitInternal, 0, resource.url(), makeString("Failed integrity metadata check. "_s, integrityMismatchDescription(resource, expectedMetadata)), ResourceError::Type::AccessControl));
}
void DocumentThreadableLoader::logErrorAndFail(const ResourceError& error)
{
if (m_shouldLogError == ShouldLogError::Yes) {
Ref document = *m_document;
if (error.isAccessControl() && error.domain() != InspectorNetworkAgent::errorDomain() && !error.localizedDescription().isEmpty())
document->addConsoleMessage(MessageSource::Security, MessageLevel::Error, error.localizedDescription());
logError(document, error, m_options.initiatorType);
}
ASSERT(m_client);
if (m_client)
m_client->didFail(error); // May cause the client to get destroyed.
}
} // namespace WebCore