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webkit / WebKit / 7fe4b05a6e1bebe4bdb270faa792e30e9af7dec1 / . / Source / WebCore / loader / DocumentLoader.cpp
blob: c7a25c86b9f61c8ea00c135973225177bdc4ecbe [file] [log] [blame]
/*
* Copyright (C) 2006-2020 Apple Inc. All rights reserved.
* 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.
* 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 "DocumentLoader.h"
#include "ApplicationCacheHost.h"
#include "Archive.h"
#include "ArchiveResourceCollection.h"
#include "CachedPage.h"
#include "CachedRawResource.h"
#include "CachedResourceLoader.h"
#include "ContentExtensionError.h"
#include "ContentSecurityPolicy.h"
#include "CustomHeaderFields.h"
#include "DOMWindow.h"
#include "Document.h"
#include "DocumentParser.h"
#include "DocumentWriter.h"
#include "ElementChildIterator.h"
#include "Event.h"
#include "EventNames.h"
#include "ExtensionStyleSheets.h"
#include "FormState.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameTree.h"
#include "HTMLFormElement.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLObjectElement.h"
#include "HTTPHeaderNames.h"
#include "HistoryItem.h"
#include "HistoryController.h"
#include "IconLoader.h"
#include "InspectorInstrumentation.h"
#include "LegacySchemeRegistry.h"
#include "LinkIconCollector.h"
#include "LinkIconType.h"
#include "LoaderStrategy.h"
#include "Logging.h"
#include "MemoryCache.h"
#include "NetworkLoadMetrics.h"
#include "Page.h"
#include "PingLoader.h"
#include "PlatformStrategies.h"
#include "PolicyChecker.h"
#include "ProgressTracker.h"
#include "ResourceHandle.h"
#include "ResourceLoadObserver.h"
#include "RuntimeEnabledFeatures.h"
#include "SWClientConnection.h"
#include "ScriptableDocumentParser.h"
#include "SecurityPolicy.h"
#include "ServiceWorker.h"
#include "ServiceWorkerClientData.h"
#include "ServiceWorkerProvider.h"
#include "Settings.h"
#include "SubresourceLoader.h"
#include "TextResourceDecoder.h"
#include <wtf/Assertions.h>
#include <wtf/CompletionHandler.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/Ref.h>
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
#if ENABLE(APPLICATION_MANIFEST)
#include "ApplicationManifestLoader.h"
#include "HTMLHeadElement.h"
#include "HTMLLinkElement.h"
#endif
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
#include "ArchiveFactory.h"
#endif
#if ENABLE(CONTENT_FILTERING)
#include "ContentFilter.h"
#include "FrameLoadRequest.h"
#include "ScriptController.h"
#endif
#if USE(QUICK_LOOK)
#include "PreviewConverter.h"
#include "QuickLook.h"
#endif
#define PAGE_ID ((m_frame ? m_frame->pageID().valueOr(PageIdentifier()) : PageIdentifier()).toUInt64())
#define FRAME_ID ((m_frame ? m_frame->frameID().valueOr(FrameIdentifier()) : FrameIdentifier()).toUInt64())
#define IS_MAIN_FRAME (m_frame ? m_frame->isMainFrame() : false)
#define RELEASE_LOG_IF_ALLOWED(fmt, ...) RELEASE_LOG_IF(isAlwaysOnLoggingAllowed(), Network, "%p - [pageID=%" PRIu64 ", frameID=%" PRIu64 ", main=%d] DocumentLoader::" fmt, this, PAGE_ID, FRAME_ID, IS_MAIN_FRAME, ##__VA_ARGS__)
namespace WebCore {
static void cancelAll(const ResourceLoaderMap& loaders)
{
for (auto& loader : copyToVector(loaders.values()))
loader->cancel();
}
static void setAllDefersLoading(const ResourceLoaderMap& loaders, bool defers)
{
for (auto& loader : copyToVector(loaders.values()))
loader->setDefersLoading(defers);
}
static HashMap<DocumentIdentifier, DocumentLoader*>& temporaryIdentifierToLoaderMap()
{
static NeverDestroyed<HashMap<DocumentIdentifier, DocumentLoader*>> map;
return map.get();
}
DocumentLoader* DocumentLoader::fromTemporaryDocumentIdentifier(DocumentIdentifier identifier)
{
return temporaryIdentifierToLoaderMap().get(identifier);
}
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(DocumentLoader);
DocumentLoader::DocumentLoader(const ResourceRequest& request, const SubstituteData& substituteData)
: FrameDestructionObserver(nullptr)
, m_cachedResourceLoader(CachedResourceLoader::create(this))
, m_originalRequest(request)
, m_substituteData(substituteData)
, m_originalRequestCopy(request)
, m_request(request)
, m_originalSubstituteDataWasValid(substituteData.isValid())
, m_substituteResourceDeliveryTimer(*this, &DocumentLoader::substituteResourceDeliveryTimerFired)
, m_dataLoadTimer(*this, &DocumentLoader::handleSubstituteDataLoadNow)
, m_applicationCacheHost(makeUnique<ApplicationCacheHost>(*this))
{
}
FrameLoader* DocumentLoader::frameLoader() const
{
if (!m_frame)
return nullptr;
return &m_frame->loader();
}
SubresourceLoader* DocumentLoader::mainResourceLoader() const
{
if (!m_mainResource)
return nullptr;
return m_mainResource->loader();
}
DocumentLoader::~DocumentLoader()
{
ASSERT(!m_frame || !isLoading() || frameLoader()->activeDocumentLoader() != this);
ASSERT_WITH_MESSAGE(!m_waitingForContentPolicy, "The content policy callback should never outlive its DocumentLoader.");
ASSERT_WITH_MESSAGE(!m_waitingForNavigationPolicy, "The navigation policy callback should never outlive its DocumentLoader.");
m_cachedResourceLoader->clearDocumentLoader();
clearMainResource();
#if ENABLE(SERVICE_WORKER)
if (m_temporaryServiceWorkerClient) {
ASSERT(temporaryIdentifierToLoaderMap().contains(*m_temporaryServiceWorkerClient));
temporaryIdentifierToLoaderMap().remove(*m_temporaryServiceWorkerClient);
}
#endif
}
RefPtr<SharedBuffer> DocumentLoader::mainResourceData() const
{
if (m_substituteData.isValid())
return m_substituteData.content()->copy();
if (m_mainResource)
return m_mainResource->resourceBuffer();
return nullptr;
}
Document* DocumentLoader::document() const
{
if (m_frame && m_frame->loader().documentLoader() == this)
return m_frame->document();
return nullptr;
}
void DocumentLoader::replaceRequestURLForSameDocumentNavigation(const URL& url)
{
m_originalRequestCopy.setURL(url);
m_request.setURL(url);
}
void DocumentLoader::setRequest(const ResourceRequest& req)
{
// Replacing an unreachable URL with alternate content looks like a server-side
// redirect at this point, but we can replace a committed dataSource.
bool handlingUnreachableURL = false;
handlingUnreachableURL = m_substituteData.isValid() && !m_substituteData.failingURL().isEmpty();
bool shouldNotifyAboutProvisionalURLChange = false;
if (handlingUnreachableURL)
m_committed = false;
else if (isLoadingMainResource() && req.url() != m_request.url())
shouldNotifyAboutProvisionalURLChange = true;
// We should never be getting a redirect callback after the data
// source is committed, except in the unreachable URL case. It
// would be a WebFoundation bug if it sent a redirect callback after commit.
ASSERT(!m_committed);
m_request = req;
if (shouldNotifyAboutProvisionalURLChange) {
// Logging for <rdar://problem/54830233>.
if (!frameLoader()->provisionalDocumentLoader())
RELEASE_LOG_IF_ALLOWED("DocumentLoader::setRequest: With no provisional document loader");
frameLoader()->client().dispatchDidChangeProvisionalURL();
}
}
void DocumentLoader::setMainDocumentError(const ResourceError& error)
{
if (!error.isNull())
RELEASE_LOG_IF_ALLOWED("setMainDocumentError: (type = %d, code = %d)", static_cast<int>(error.type()), error.errorCode());
m_mainDocumentError = error;
frameLoader()->client().setMainDocumentError(this, error);
}
void DocumentLoader::mainReceivedError(const ResourceError& error)
{
ASSERT(!error.isNull());
if (!frameLoader())
return;
if (!error.isNull())
RELEASE_LOG_IF_ALLOWED("mainReceivedError: (type = %d, code = %d)", static_cast<int>(error.type()), error.errorCode());
if (m_identifierForLoadWithoutResourceLoader) {
ASSERT(!mainResourceLoader());
frameLoader()->client().dispatchDidFailLoading(this, m_identifierForLoadWithoutResourceLoader, error);
}
// There is a bug in CFNetwork where callbacks can be dispatched even when loads are deferred.
// See <rdar://problem/6304600> for more details.
#if !USE(CF)
ASSERT(!mainResourceLoader() || !mainResourceLoader()->defersLoading());
#endif
m_applicationCacheHost->failedLoadingMainResource();
setMainDocumentError(error);
clearMainResourceLoader();
frameLoader()->receivedMainResourceError(error);
}
// Cancels the data source's pending loads. Conceptually, a data source only loads
// one document at a time, but one document may have many related resources.
// stopLoading will stop all loads initiated by the data source,
// but not loads initiated by child frames' data sources -- that's the WebFrame's job.
void DocumentLoader::stopLoading()
{
RefPtr<Frame> protectedFrame(m_frame);
Ref<DocumentLoader> protectedThis(*this);
// In some rare cases, calling FrameLoader::stopLoading could cause isLoading() to return false.
// (This can happen when there's a single XMLHttpRequest currently loading and stopLoading causes it
// to stop loading. Because of this, we need to save it so we don't return early.
bool loading = isLoading();
if (m_committed) {
// Attempt to stop the frame if the document loader is loading, or if it is done loading but
// still parsing. Failure to do so can cause a world leak.
Document* doc = m_frame->document();
if (loading || doc->parsing())
m_frame->loader().stopLoading(UnloadEventPolicyNone);
}
for (auto callbackIdentifier : m_iconLoaders.values())
notifyFinishedLoadingIcon(callbackIdentifier, nullptr);
m_iconLoaders.clear();
m_iconsPendingLoadDecision.clear();
#if ENABLE(APPLICATION_MANIFEST)
for (auto callbackIdentifier : m_applicationManifestLoaders.values())
notifyFinishedLoadingApplicationManifest(callbackIdentifier, WTF::nullopt);
m_applicationManifestLoaders.clear();
#endif
// Always cancel multipart loaders
cancelAll(m_multipartSubresourceLoaders);
// Appcache uses ResourceHandle directly, DocumentLoader doesn't count these loads.
m_applicationCacheHost->stopLoadingInFrame(*m_frame);
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
clearArchiveResources();
#endif
if (!loading) {
// If something above restarted loading we might run into mysterious crashes like
// https://bugs.webkit.org/show_bug.cgi?id=62764 and <rdar://problem/9328684>
ASSERT(!isLoading());
return;
}
// We might run in to infinite recursion if we're stopping loading as the result of
// detaching from the frame, so break out of that recursion here.
// See <rdar://problem/9673866> for more details.
if (m_isStopping)
return;
m_isStopping = true;
// The frame may have been detached from this document by the onunload handler
if (auto* frameLoader = DocumentLoader::frameLoader()) {
RELEASE_LOG_IF_ALLOWED("stopLoading: canceling load");
if (isLoadingMainResource()) {
// Stop the main resource loader and let it send the cancelled message.
cancelMainResourceLoad(frameLoader->cancelledError(m_request));
} else if (!m_subresourceLoaders.isEmpty() || !m_plugInStreamLoaders.isEmpty()) {
// The main resource loader already finished loading. Set the cancelled error on the
// document and let the subresourceLoaders and pluginLoaders send individual cancelled messages below.
setMainDocumentError(frameLoader->cancelledError(m_request));
} else {
// If there are no resource loaders, we need to manufacture a cancelled message.
// (A back/forward navigation has no resource loaders because its resources are cached.)
mainReceivedError(frameLoader->cancelledError(m_request));
}
}
// We always need to explicitly cancel the Document's parser when stopping the load.
// Otherwise cancelling the parser while starting the next page load might result
// in unexpected side effects such as erroneous event dispatch. ( http://webkit.org/b/117112 )
if (Document* document = this->document())
document->cancelParsing();
stopLoadingSubresources();
stopLoadingPlugIns();
m_isStopping = false;
}
void DocumentLoader::commitIfReady()
{
if (!m_committed) {
m_committed = true;
frameLoader()->commitProvisionalLoad();
}
}
bool DocumentLoader::isLoading() const
{
// if (document() && document()->hasActiveParser())
// return true;
// FIXME: The above code should be enabled, but it seems to cause
// http/tests/security/feed-urls-from-remote.html to timeout on Mac WK1
// see http://webkit.org/b/110554 and http://webkit.org/b/110401
return isLoadingMainResource() || !m_subresourceLoaders.isEmpty() || !m_plugInStreamLoaders.isEmpty();
}
void DocumentLoader::notifyFinished(CachedResource& resource, const NetworkLoadMetrics&)
{
ASSERT(isMainThread());
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilter && !m_contentFilter->continueAfterNotifyFinished(resource))
return;
#endif
ASSERT_UNUSED(resource, m_mainResource == &resource);
ASSERT(m_mainResource);
if (!m_mainResource->errorOccurred() && !m_mainResource->wasCanceled()) {
finishedLoading();
return;
}
if (m_request.cachePolicy() == ResourceRequestCachePolicy::ReturnCacheDataDontLoad && !m_mainResource->wasCanceled()) {
frameLoader()->retryAfterFailedCacheOnlyMainResourceLoad();
return;
}
if (!m_mainResource->resourceError().isNull())
RELEASE_LOG_IF_ALLOWED("notifyFinished: canceling load (type = %d, code = %d)", static_cast<int>(m_mainResource->resourceError().type()), m_mainResource->resourceError().errorCode());
mainReceivedError(m_mainResource->resourceError());
}
void DocumentLoader::finishedLoading()
{
// There is a bug in CFNetwork where callbacks can be dispatched even when loads are deferred.
// See <rdar://problem/6304600> for more details.
#if !USE(CF)
ASSERT(!m_frame->page()->defersLoading() || frameLoader()->stateMachine().creatingInitialEmptyDocument() || InspectorInstrumentation::isDebuggerPaused(m_frame));
#endif
Ref<DocumentLoader> protectedThis(*this);
if (m_identifierForLoadWithoutResourceLoader) {
// A didFinishLoading delegate might try to cancel the load (despite it
// being finished). Clear m_identifierForLoadWithoutResourceLoader
// before calling dispatchDidFinishLoading so that we don't later try to
// cancel the already-finished substitute load.
NetworkLoadMetrics emptyMetrics;
unsigned long identifier = m_identifierForLoadWithoutResourceLoader;
m_identifierForLoadWithoutResourceLoader = 0;
frameLoader()->notifier().dispatchDidFinishLoading(this, identifier, emptyMetrics, nullptr);
}
maybeFinishLoadingMultipartContent();
MonotonicTime responseEndTime = m_timeOfLastDataReceived ? m_timeOfLastDataReceived : MonotonicTime::now();
timing().setResponseEnd(responseEndTime);
commitIfReady();
if (!frameLoader())
return;
if (!maybeCreateArchive()) {
// If this is an empty document, it will not have actually been created yet. Commit dummy data so that
// DocumentWriter::begin() gets called and creates the Document.
if (!m_gotFirstByte)
commitData(0, 0);
if (!frameLoader())
return;
frameLoader()->client().finishedLoading(this);
}
m_writer.end();
if (!m_mainDocumentError.isNull())
return;
clearMainResourceLoader();
if (!frameLoader())
return;
if (!frameLoader()->stateMachine().creatingInitialEmptyDocument())
frameLoader()->checkLoadComplete();
// If the document specified an application cache manifest, it violates the author's intent if we store it in the memory cache
// and deny the appcache the chance to intercept it in the future, so remove from the memory cache.
if (m_frame) {
if (m_mainResource && m_frame->document()->hasManifest())
MemoryCache::singleton().remove(*m_mainResource);
}
m_applicationCacheHost->finishedLoadingMainResource();
}
bool DocumentLoader::isPostOrRedirectAfterPost(const ResourceRequest& newRequest, const ResourceResponse& redirectResponse)
{
if (newRequest.httpMethod() == "POST")
return true;
int status = redirectResponse.httpStatusCode();
if (((status >= 301 && status <= 303) || status == 307)
&& m_originalRequest.httpMethod() == "POST")
return true;
return false;
}
void DocumentLoader::handleSubstituteDataLoadNow()
{
Ref<DocumentLoader> protectedThis = makeRef(*this);
ResourceResponse response = m_substituteData.response();
if (response.url().isEmpty())
response = ResourceResponse(m_request.url(), m_substituteData.mimeType(), m_substituteData.content()->size(), m_substituteData.textEncoding());
responseReceived(response, nullptr);
}
void DocumentLoader::startDataLoadTimer()
{
m_dataLoadTimer.startOneShot(0_s);
#if HAVE(RUNLOOP_TIMER)
if (SchedulePairHashSet* scheduledPairs = m_frame->page()->scheduledRunLoopPairs())
m_dataLoadTimer.schedule(*scheduledPairs);
#endif
}
#if ENABLE(SERVICE_WORKER)
bool DocumentLoader::setControllingServiceWorkerRegistration(ServiceWorkerRegistrationData&& data)
{
if (!m_loadingMainResource)
return false;
ASSERT(!m_gotFirstByte);
m_serviceWorkerRegistrationData = WTFMove(data);
return true;
}
void DocumentLoader::matchRegistration(const URL& url, SWClientConnection::RegistrationCallback&& callback)
{
auto shouldTryLoadingThroughServiceWorker = !frameLoader()->isReloadingFromOrigin() && m_frame->page() && RuntimeEnabledFeatures::sharedFeatures().serviceWorkerEnabled() && url.protocolIsInHTTPFamily();
if (!shouldTryLoadingThroughServiceWorker) {
callback(WTF::nullopt);
return;
}
auto origin = (!m_frame->isMainFrame() && m_frame->document()) ? m_frame->document()->topOrigin().data() : SecurityOriginData::fromURL(url);
if (!ServiceWorkerProvider::singleton().serviceWorkerConnection().mayHaveServiceWorkerRegisteredForOrigin(origin)) {
callback(WTF::nullopt);
return;
}
auto& connection = ServiceWorkerProvider::singleton().serviceWorkerConnection();
connection.matchRegistration(WTFMove(origin), url, WTFMove(callback));
}
static inline bool areRegistrationsEqual(const Optional<ServiceWorkerRegistrationData>& a, const Optional<ServiceWorkerRegistrationData>& b)
{
if (!a)
return !b;
if (!b)
return false;
return a->identifier == b->identifier;
}
#endif
void DocumentLoader::redirectReceived(CachedResource& resource, ResourceRequest&& request, const ResourceResponse& redirectResponse, CompletionHandler<void(ResourceRequest&&)>&& completionHandler)
{
ASSERT_UNUSED(resource, &resource == m_mainResource);
#if ENABLE(SERVICE_WORKER)
if (m_serviceWorkerRegistrationData) {
m_serviceWorkerRegistrationData = { };
unregisterTemporaryServiceWorkerClient();
}
willSendRequest(WTFMove(request), redirectResponse, [completionHandler = WTFMove(completionHandler), protectedThis = makeRef(*this), this] (auto&& request) mutable {
ASSERT(!m_substituteData.isValid());
if (request.isNull() || !m_mainDocumentError.isNull() || !m_frame) {
completionHandler({ });
return;
}
if (m_applicationCacheHost->canLoadMainResource(request)) {
auto url = request.url();
// Let's check service worker registration to see whether loading from network or not.
this->matchRegistration(url, [request = WTFMove(request), completionHandler = WTFMove(completionHandler), protectedThis = WTFMove(protectedThis), this](auto&& registrationData) mutable {
if (!m_mainDocumentError.isNull() || !m_frame) {
completionHandler({ });
return;
}
if (!registrationData && this->tryLoadingRedirectRequestFromApplicationCache(request)) {
completionHandler({ });
return;
}
completionHandler(WTFMove(request));
});
return;
}
completionHandler(WTFMove(request));
});
#else
willSendRequest(WTFMove(request), redirectResponse, WTFMove(completionHandler));
#endif
}
void DocumentLoader::willSendRequest(ResourceRequest&& newRequest, const ResourceResponse& redirectResponse, CompletionHandler<void(ResourceRequest&&)>&& completionHandler)
{
// Note that there are no asserts here as there are for the other callbacks. This is due to the
// fact that this "callback" is sent when starting every load, and the state of callback
// deferrals plays less of a part in this function in preventing the bad behavior deferring
// callbacks is meant to prevent.
ASSERT(!newRequest.isNull());
// Logging for <rdar://problem/54830233>.
if (!frameLoader() || !frameLoader()->provisionalDocumentLoader())
RELEASE_LOG_IF_ALLOWED("willSendRequest: With no provisional document loader");
bool didReceiveRedirectResponse = !redirectResponse.isNull();
if (!frameLoader()->checkIfFormActionAllowedByCSP(newRequest.url(), didReceiveRedirectResponse)) {
RELEASE_LOG_IF_ALLOWED("willSendRequest: canceling - form action not allowed by CSP");
cancelMainResourceLoad(frameLoader()->cancelledError(newRequest));
return completionHandler(WTFMove(newRequest));
}
ASSERT(timing().fetchStart());
if (didReceiveRedirectResponse) {
// If the redirecting url is not allowed to display content from the target origin,
// then block the redirect.
Ref<SecurityOrigin> redirectingOrigin(SecurityOrigin::create(redirectResponse.url()));
if (!redirectingOrigin.get().canDisplay(newRequest.url())) {
RELEASE_LOG_IF_ALLOWED("willSendRequest: canceling - redirecting URL not allowed to display content from target");
FrameLoader::reportLocalLoadFailed(m_frame, newRequest.url().string());
cancelMainResourceLoad(frameLoader()->cancelledError(newRequest));
return completionHandler(WTFMove(newRequest));
}
if (!portAllowed(newRequest.url())) {
RELEASE_LOG_IF_ALLOWED("willSendRequest: canceling - port not allowed");
if (m_frame)
m_frame->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Not allowed to use restricted network port: " + newRequest.url().string());
cancelMainResourceLoad(frameLoader()->blockedError(newRequest));
return completionHandler(WTFMove(newRequest));
}
timing().addRedirect(redirectResponse.url(), newRequest.url());
}
ASSERT(m_frame);
Frame& topFrame = m_frame->tree().top();
ASSERT(m_frame->document());
ASSERT(topFrame.document());
// Update cookie policy base URL as URL changes, except for subframes, which use the
// URL of the main frame which doesn't change when we redirect.
if (m_frame->isMainFrame())
newRequest.setFirstPartyForCookies(newRequest.url());
FrameLoader::addSameSiteInfoToRequestIfNeeded(newRequest, m_frame->document());
if (!didReceiveRedirectResponse)
frameLoader()->client().dispatchWillChangeDocument(m_frame->document()->url(), newRequest.url());
// If we're fielding a redirect in response to a POST, force a load from origin, since
// this is a common site technique to return to a page viewing some data that the POST
// just modified.
// Also, POST requests always load from origin, but this does not affect subresources.
if (newRequest.cachePolicy() == ResourceRequestCachePolicy::UseProtocolCachePolicy && isPostOrRedirectAfterPost(newRequest, redirectResponse))
newRequest.setCachePolicy(ResourceRequestCachePolicy::ReloadIgnoringCacheData);
if (&topFrame != m_frame) {
if (!m_frame->loader().mixedContentChecker().canDisplayInsecureContent(m_frame->document()->securityOrigin(), MixedContentChecker::ContentType::Active, newRequest.url(), MixedContentChecker::AlwaysDisplayInNonStrictMode::Yes)) {
cancelMainResourceLoad(frameLoader()->cancelledError(newRequest));
return completionHandler(WTFMove(newRequest));
}
if (!frameLoader()->mixedContentChecker().canDisplayInsecureContent(topFrame.document()->securityOrigin(), MixedContentChecker::ContentType::Active, newRequest.url())) {
cancelMainResourceLoad(frameLoader()->cancelledError(newRequest));
return completionHandler(WTFMove(newRequest));
}
}
if (!newRequest.url().host().isEmpty() && SecurityOrigin::shouldIgnoreHost(newRequest.url())) {
auto url = newRequest.url();
url.setHostAndPort({ });
newRequest.setURL(WTFMove(url));
}
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilter && !m_contentFilter->continueAfterWillSendRequest(newRequest, redirectResponse))
return completionHandler(WTFMove(newRequest));
#endif
setRequest(newRequest);
if (!didReceiveRedirectResponse)
return completionHandler(WTFMove(newRequest));
auto navigationPolicyCompletionHandler = [this, protectedThis = makeRef(*this), completionHandler = WTFMove(completionHandler)] (ResourceRequest&& request, WeakPtr<FormState>&&, NavigationPolicyDecision navigationPolicyDecision) mutable {
m_waitingForNavigationPolicy = false;
switch (navigationPolicyDecision) {
case NavigationPolicyDecision::IgnoreLoad:
case NavigationPolicyDecision::StopAllLoads:
stopLoadingForPolicyChange();
break;
case NavigationPolicyDecision::ContinueLoad:
break;
}
completionHandler(WTFMove(request));
};
ASSERT(!m_waitingForNavigationPolicy);
m_waitingForNavigationPolicy = true;
// FIXME: Add a load type check.
auto& policyChecker = frameLoader()->policyChecker();
RELEASE_ASSERT(!isBackForwardLoadType(policyChecker.loadType()) || frameLoader()->history().provisionalItem());
policyChecker.checkNavigationPolicy(WTFMove(newRequest), redirectResponse, WTFMove(navigationPolicyCompletionHandler));
}
bool DocumentLoader::tryLoadingRequestFromApplicationCache()
{
m_applicationCacheHost->maybeLoadMainResource(m_request, m_substituteData);
return tryLoadingSubstituteData();
}
bool DocumentLoader::tryLoadingSubstituteData()
{
if (!m_substituteData.isValid() || !m_frame->page())
return false;
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource: Returning substitute data");
m_identifierForLoadWithoutResourceLoader = m_frame->page()->progress().createUniqueIdentifier();
frameLoader()->notifier().assignIdentifierToInitialRequest(m_identifierForLoadWithoutResourceLoader, this, m_request);
frameLoader()->notifier().dispatchWillSendRequest(this, m_identifierForLoadWithoutResourceLoader, m_request, ResourceResponse());
if (!m_deferMainResourceDataLoad || frameLoader()->loadsSynchronously())
handleSubstituteDataLoadNow();
else
startDataLoadTimer();
return true;
}
bool DocumentLoader::tryLoadingRedirectRequestFromApplicationCache(const ResourceRequest& request)
{
m_applicationCacheHost->maybeLoadMainResourceForRedirect(request, m_substituteData);
if (!m_substituteData.isValid())
return false;
RELEASE_ASSERT(m_mainResource);
auto* loader = m_mainResource->loader();
m_identifierForLoadWithoutResourceLoader = loader ? loader->identifier() : m_mainResource->identifierForLoadWithoutResourceLoader();
// We need to remove our reference to the CachedResource in favor of a SubstituteData load, which can triger the cancellation of the underyling ResourceLoader.
// If the ResourceLoader is indeed cancelled, it would normally send resource load callbacks.
// Therefore, sever our relationship with the network load but prevent the ResourceLoader from sending ResourceLoadNotifier callbacks.
auto resourceLoader = makeRefPtr(mainResourceLoader());
if (resourceLoader) {
ASSERT(resourceLoader->shouldSendResourceLoadCallbacks());
resourceLoader->setSendCallbackPolicy(SendCallbackPolicy::DoNotSendCallbacks);
}
clearMainResource();
if (resourceLoader)
resourceLoader->setSendCallbackPolicy(SendCallbackPolicy::SendCallbacks);
handleSubstituteDataLoadNow();
return true;
}
void DocumentLoader::stopLoadingAfterXFrameOptionsOrContentSecurityPolicyDenied(unsigned long identifier, const ResourceResponse& response)
{
Ref<DocumentLoader> protectedThis { *this };
InspectorInstrumentation::continueAfterXFrameOptionsDenied(*m_frame, identifier, *this, response);
m_frame->document()->enforceSandboxFlags(SandboxOrigin);
if (HTMLFrameOwnerElement* ownerElement = m_frame->ownerElement())
ownerElement->dispatchEvent(Event::create(eventNames().loadEvent, Event::CanBubble::No, Event::IsCancelable::No));
// The load event might have detached this frame. In that case, the load will already have been cancelled during detach.
if (FrameLoader* frameLoader = this->frameLoader())
cancelMainResourceLoad(frameLoader->cancelledError(m_request));
}
void DocumentLoader::responseReceived(CachedResource& resource, const ResourceResponse& response, CompletionHandler<void()>&& completionHandler)
{
ASSERT_UNUSED(resource, m_mainResource == &resource);
#if ENABLE(SERVICE_WORKER)
if (RuntimeEnabledFeatures::sharedFeatures().serviceWorkerEnabled() && response.source() == ResourceResponse::Source::MemoryCache) {
matchRegistration(response.url(), [this, protectedThis = makeRef(*this), response, completionHandler = WTFMove(completionHandler)](auto&& registrationData) mutable {
if (!m_mainDocumentError.isNull() || !m_frame) {
completionHandler();
return;
}
m_serviceWorkerRegistrationData = WTFMove(registrationData);
responseReceived(response, WTFMove(completionHandler));
});
return;
}
#endif
responseReceived(response, WTFMove(completionHandler));
}
void DocumentLoader::responseReceived(const ResourceResponse& response, CompletionHandler<void()>&& completionHandler)
{
ASSERT(response.certificateInfo());
CompletionHandlerCallingScope completionHandlerCaller(WTFMove(completionHandler));
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilter && !m_contentFilter->continueAfterResponseReceived(response))
return;
#endif
Ref<DocumentLoader> protectedThis(*this);
bool willLoadFallback = m_applicationCacheHost->maybeLoadFallbackForMainResponse(request(), response);
// The memory cache doesn't understand the application cache or its caching rules. So if a main resource is served
// from the application cache, ensure we don't save the result for future use.
if (willLoadFallback)
MemoryCache::singleton().remove(*m_mainResource);
if (willLoadFallback)
return;
ASSERT(m_identifierForLoadWithoutResourceLoader || m_mainResource);
unsigned long identifier = m_identifierForLoadWithoutResourceLoader ? m_identifierForLoadWithoutResourceLoader : m_mainResource->identifier();
ASSERT(identifier);
if (m_substituteData.isValid() || !platformStrategies()->loaderStrategy()->havePerformedSecurityChecks(response)) {
auto url = response.url();
ContentSecurityPolicy contentSecurityPolicy(URL { url }, this);
contentSecurityPolicy.didReceiveHeaders(ContentSecurityPolicyResponseHeaders { response }, m_request.httpReferrer());
if (!contentSecurityPolicy.allowFrameAncestors(*m_frame, url)) {
stopLoadingAfterXFrameOptionsOrContentSecurityPolicyDenied(identifier, response);
return;
}
if (!contentSecurityPolicy.overridesXFrameOptions()) {
String frameOptions = response.httpHeaderFields().get(HTTPHeaderName::XFrameOptions);
if (!frameOptions.isNull()) {
if (frameLoader()->shouldInterruptLoadForXFrameOptions(frameOptions, url, identifier)) {
String message = "Refused to display '" + url.stringCenterEllipsizedToLength() + "' in a frame because it set 'X-Frame-Options' to '" + frameOptions + "'.";
m_frame->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, message, identifier);
stopLoadingAfterXFrameOptionsOrContentSecurityPolicyDenied(identifier, response);
return;
}
}
}
}
// There is a bug in CFNetwork where callbacks can be dispatched even when loads are deferred.
// See <rdar://problem/6304600> for more details.
#if !USE(CF)
ASSERT(!mainResourceLoader() || !mainResourceLoader()->defersLoading());
#endif
if (m_isLoadingMultipartContent) {
setupForReplace();
m_mainResource->clear();
} else if (response.isMultipart())
m_isLoadingMultipartContent = true;
m_response = response;
if (m_identifierForLoadWithoutResourceLoader) {
if (m_mainResource && m_mainResource->wasRedirected()) {
ASSERT(m_mainResource->status() == CachedResource::Status::Cached);
frameLoader()->client().dispatchDidReceiveServerRedirectForProvisionalLoad();
}
addResponse(m_response);
frameLoader()->notifier().dispatchDidReceiveResponse(this, m_identifierForLoadWithoutResourceLoader, m_response, 0);
}
ASSERT(!m_waitingForContentPolicy);
ASSERT(frameLoader());
m_waitingForContentPolicy = true;
// Always show content with valid substitute data.
if (m_substituteData.isValid()) {
continueAfterContentPolicy(PolicyAction::Use);
return;
}
#if ENABLE(FTPDIR)
// Respect the hidden FTP Directory Listing pref so it can be tested even if the policy delegate might otherwise disallow it
if (m_frame->settings().forceFTPDirectoryListings() && m_response.mimeType() == "application/x-ftp-directory") {
continueAfterContentPolicy(PolicyAction::Use);
return;
}
#endif
RefPtr<SubresourceLoader> mainResourceLoader = this->mainResourceLoader();
if (mainResourceLoader)
mainResourceLoader->markInAsyncResponsePolicyCheck();
auto requestIdentifier = PolicyCheckIdentifier::create();
frameLoader()->checkContentPolicy(m_response, requestIdentifier, [this, protectedThis = makeRef(*this), mainResourceLoader = WTFMove(mainResourceLoader),
completionHandler = completionHandlerCaller.release(), requestIdentifier] (PolicyAction policy, PolicyCheckIdentifier responseIdentifier) mutable {
RELEASE_ASSERT(responseIdentifier.isValidFor(requestIdentifier));
continueAfterContentPolicy(policy);
if (mainResourceLoader)
mainResourceLoader->didReceiveResponsePolicy();
if (completionHandler)
completionHandler();
});
}
// Prevent web archives from loading if
// 1) it is remote;
// 2) it is not the main frame;
// 3) it is not any of { loaded by clients; loaded by drag; reloaded from any of the previous two };
// because they can claim to be from any domain and thus avoid cross-domain security checks (4120255, 45524528, 47610130).
bool DocumentLoader::disallowWebArchive() const
{
using MIMETypeHashSet = HashSet<String, ASCIICaseInsensitiveHash>;
static NeverDestroyed<MIMETypeHashSet> webArchiveMIMETypes {
MIMETypeHashSet {
"application/x-webarchive"_s,
"application/x-mimearchive"_s,
"multipart/related"_s,
#if PLATFORM(GTK)
"message/rfc822"_s,
#endif
}
};
String mimeType = m_response.mimeType();
if (mimeType.isNull() || !webArchiveMIMETypes.get().contains(mimeType))
return false;
#if USE(QUICK_LOOK)
if (isQuickLookPreviewURL(m_response.url()))
return false;
#endif
if (m_substituteData.isValid())
return false;
if (!LegacySchemeRegistry::shouldTreatURLSchemeAsLocal(m_request.url().protocol().toStringWithoutCopying()))
return true;
if (!frame() || (frame()->isMainFrame() && m_allowsWebArchiveForMainFrame))
return false;
// On purpose of maintaining existing tests.
if (frame()->mainFrame().loader().alwaysAllowLocalWebarchive())
return false;
return true;
}
// Prevent data URIs from loading as the main frame unless the result of user action.
bool DocumentLoader::disallowDataRequest() const
{
if (!m_response.url().protocolIsData())
return false;
if (!frame() || !frame()->isMainFrame() || m_allowsDataURLsForMainFrame || frame()->settings().allowTopNavigationToDataURLs())
return false;
if (auto* currentDocument = frame()->document()) {
unsigned long identifier = m_identifierForLoadWithoutResourceLoader ? m_identifierForLoadWithoutResourceLoader : m_mainResource->identifier();
ASSERT(identifier);
currentDocument->addConsoleMessage(MessageSource::Security, MessageLevel::Error, makeString("Not allowed to navigate top frame to data URL '", m_response.url().stringCenterEllipsizedToLength(), "'."), identifier);
}
RELEASE_LOG_IF_ALLOWED("continueAfterContentPolicy: cannot show URL");
return true;
}
void DocumentLoader::continueAfterContentPolicy(PolicyAction policy)
{
ASSERT(m_waitingForContentPolicy);
m_waitingForContentPolicy = false;
if (isStopping())
return;
if (!m_frame) {
RELEASE_LOG_IF_ALLOWED("continueAfterContentPolicy: Policy action %i received by DocumentLoader with null frame", (int)policy);
return;
}
switch (policy) {
case PolicyAction::Use: {
if (!frameLoader()->client().canShowMIMEType(m_response.mimeType()) || disallowWebArchive() || disallowDataRequest()) {
frameLoader()->policyChecker().cannotShowMIMEType(m_response);
// Check reachedTerminalState since the load may have already been canceled inside of _handleUnimplementablePolicyWithErrorCode::.
stopLoadingForPolicyChange();
return;
}
break;
}
case PolicyAction::Download: {
// m_mainResource can be null, e.g. when loading a substitute resource from application cache.
if (!m_mainResource) {
RELEASE_LOG_IF_ALLOWED("continueAfterContentPolicy: cannot show URL");
mainReceivedError(frameLoader()->client().cannotShowURLError(m_request));
return;
}
if (ResourceLoader* mainResourceLoader = this->mainResourceLoader())
InspectorInstrumentation::continueWithPolicyDownload(*m_frame, mainResourceLoader->identifier(), *this, m_response);
// When starting the request, we didn't know that it would result in download and not navigation. Now we know that main document URL didn't change.
// Download may use this knowledge for purposes unrelated to cookies, notably for setting file quarantine data.
frameLoader()->setOriginalURLForDownloadRequest(m_request);
if (m_request.url().protocolIsData()) {
// We decode data URL internally, there is no resource load to convert.
frameLoader()->client().startDownload(m_request);
} else
frameLoader()->client().convertMainResourceLoadToDownload(this, m_request, m_response);
// The main resource might be loading from the memory cache, or its loader might have gone missing.
if (mainResourceLoader()) {
static_cast<ResourceLoader*>(mainResourceLoader())->didFail(interruptedForPolicyChangeError());
return;
}
// We must stop loading even if there is no main resource loader. Otherwise, we might remain
// the client of a CachedRawResource that will continue to send us data.
stopLoadingForPolicyChange();
return;
}
case PolicyAction::StopAllLoads:
ASSERT_NOT_REACHED();
#if !ASSERT_ENABLED
FALLTHROUGH;
#endif
case PolicyAction::Ignore:
if (ResourceLoader* mainResourceLoader = this->mainResourceLoader())
InspectorInstrumentation::continueWithPolicyIgnore(*m_frame, mainResourceLoader->identifier(), *this, m_response);
stopLoadingForPolicyChange();
return;
}
if (m_response.isInHTTPFamily()) {
int status = m_response.httpStatusCode(); // Status may be zero when loading substitute data, in particular from a WebArchive.
if (status && (status < 200 || status >= 300)) {
auto* owner = m_frame->ownerElement();
if (is<HTMLObjectElement>(owner)) {
downcast<HTMLObjectElement>(*owner).renderFallbackContent();
// object elements are no longer rendered after we fallback, so don't
// keep trying to process data from their load
cancelMainResourceLoad(frameLoader()->cancelledError(m_request));
}
}
}
if (!isStopping() && m_substituteData.isValid() && isLoadingMainResource()) {
auto content = m_substituteData.content();
if (content && content->size())
dataReceived(content->data(), content->size());
if (isLoadingMainResource())
finishedLoading();
// Remove ourselves as a client of this CachedResource as we've decided to commit substitute data but the
// load may keep going and be useful to other clients of the CachedResource. If we did not do this, we
// may receive data later on even though this DocumentLoader has finished loading.
clearMainResource();
}
}
void DocumentLoader::commitLoad(const char* data, int length)
{
// Both unloading the old page and parsing the new page may execute JavaScript which destroys the datasource
// by starting a new load, so retain temporarily.
RefPtr<Frame> protectedFrame(m_frame);
Ref<DocumentLoader> protectedThis(*this);
commitIfReady();
FrameLoader* frameLoader = DocumentLoader::frameLoader();
if (!frameLoader)
return;
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
if (ArchiveFactory::isArchiveMIMEType(response().mimeType()))
return;
#endif
frameLoader->client().committedLoad(this, data, length);
if (isMultipartReplacingLoad())
frameLoader->client().didReplaceMultipartContent();
}
ResourceError DocumentLoader::interruptedForPolicyChangeError() const
{
return frameLoader()->client().interruptedForPolicyChangeError(request());
}
void DocumentLoader::stopLoadingForPolicyChange()
{
ResourceError error = interruptedForPolicyChangeError();
error.setType(ResourceError::Type::Cancellation);
cancelMainResourceLoad(error);
}
#if ENABLE(SERVICE_WORKER)
// https://w3c.github.io/ServiceWorker/#control-and-use-window-client
static inline bool shouldUseActiveServiceWorkerFromParent(const Document& document, const Document& parent)
{
return !document.url().protocolIsInHTTPFamily() && !document.securityOrigin().isUnique() && parent.securityOrigin().canAccess(document.securityOrigin());
}
#endif
void DocumentLoader::commitData(const char* bytes, size_t length)
{
if (!m_gotFirstByte) {
m_gotFirstByte = true;
bool hasBegun = m_writer.begin(documentURL(), false);
m_writer.setDocumentWasLoadedAsPartOfNavigation();
auto& document = *m_frame->document();
if (SecurityPolicy::allowSubstituteDataAccessToLocal() && m_originalSubstituteDataWasValid) {
// If this document was loaded with substituteData, then the document can
// load local resources. See https://bugs.webkit.org/show_bug.cgi?id=16756
// and https://bugs.webkit.org/show_bug.cgi?id=19760 for further
// discussion.
document.securityOrigin().grantLoadLocalResources();
}
if (frameLoader()->stateMachine().creatingInitialEmptyDocument())
return;
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
if (m_archive && m_archive->shouldOverrideBaseURL())
document.setBaseURLOverride(m_archive->mainResource()->url());
#endif
#if ENABLE(SERVICE_WORKER)
if (RuntimeEnabledFeatures::sharedFeatures().serviceWorkerEnabled()) {
if (m_serviceWorkerRegistrationData && m_serviceWorkerRegistrationData->activeWorker) {
document.setActiveServiceWorker(ServiceWorker::getOrCreate(document, WTFMove(m_serviceWorkerRegistrationData->activeWorker.value())));
m_serviceWorkerRegistrationData = { };
} else if (auto* parent = document.parentDocument()) {
if (shouldUseActiveServiceWorkerFromParent(document, *parent))
document.setActiveServiceWorker(parent->activeServiceWorker());
}
if (m_frame->document()->activeServiceWorker() || document.url().protocolIsInHTTPFamily())
document.setServiceWorkerConnection(&ServiceWorkerProvider::singleton().serviceWorkerConnection());
// We currently unregister the temporary service worker client since we now registered the real document.
// FIXME: We should make the real document use the temporary client identifier.
unregisterTemporaryServiceWorkerClient();
}
#endif
// Call receivedFirstData() exactly once per load. We should only reach this point multiple times
// for multipart loads, and FrameLoader::isReplacing() will be true after the first time.
if (!isMultipartReplacingLoad())
frameLoader()->receivedFirstData();
// The load could be canceled under receivedFirstData(), which makes delegate calls and even sometimes dispatches DOM events.
if (!isLoading())
return;
if (auto* window = document.domWindow())
window->prewarmLocalStorageIfNecessary();
bool userChosen;
String encoding;
if (overrideEncoding().isNull()) {
userChosen = false;
encoding = response().textEncodingName();
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
if (m_archive && m_archive->shouldUseMainResourceEncoding())
encoding = m_archive->mainResource()->textEncoding();
#endif
} else {
userChosen = true;
encoding = overrideEncoding();
}
m_writer.setEncoding(encoding, userChosen);
RELEASE_ASSERT(hasBegun);
}
#if ENABLE(CONTENT_EXTENSIONS)
auto& extensionStyleSheets = m_frame->document()->extensionStyleSheets();
for (auto& pendingStyleSheet : m_pendingNamedContentExtensionStyleSheets)
extensionStyleSheets.maybeAddContentExtensionSheet(pendingStyleSheet.key, *pendingStyleSheet.value);
for (auto& pendingSelectorEntry : m_pendingContentExtensionDisplayNoneSelectors) {
for (const auto& pendingSelector : pendingSelectorEntry.value)
extensionStyleSheets.addDisplayNoneSelector(pendingSelectorEntry.key, pendingSelector.first, pendingSelector.second);
}
m_pendingNamedContentExtensionStyleSheets.clear();
m_pendingContentExtensionDisplayNoneSelectors.clear();
#endif
ASSERT(m_frame->document()->parsing());
m_writer.addData(bytes, length);
}
void DocumentLoader::dataReceived(CachedResource& resource, const char* data, int length)
{
ASSERT_UNUSED(resource, &resource == m_mainResource);
dataReceived(data, length);
}
void DocumentLoader::dataReceived(const char* data, int length)
{
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilter && !m_contentFilter->continueAfterDataReceived(data, length))
return;
#endif
ASSERT(data);
ASSERT(length);
ASSERT(!m_response.isNull());
// There is a bug in CFNetwork where callbacks can be dispatched even when loads are deferred.
// See <rdar://problem/6304600> for more details.
#if !USE(CF)
ASSERT(!mainResourceLoader() || !mainResourceLoader()->defersLoading());
#endif
if (m_identifierForLoadWithoutResourceLoader)
frameLoader()->notifier().dispatchDidReceiveData(this, m_identifierForLoadWithoutResourceLoader, data, length, -1);
m_applicationCacheHost->mainResourceDataReceived(data, length, -1, false);
m_timeOfLastDataReceived = MonotonicTime::now();
if (!isMultipartReplacingLoad())
commitLoad(data, length);
}
void DocumentLoader::setupForReplace()
{
if (!mainResourceData())
return;
frameLoader()->client().willReplaceMultipartContent();
maybeFinishLoadingMultipartContent();
maybeCreateArchive();
m_writer.end();
frameLoader()->setReplacing();
m_gotFirstByte = false;
stopLoadingSubresources();
stopLoadingPlugIns();
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
clearArchiveResources();
#endif
}
void DocumentLoader::checkLoadComplete()
{
if (!m_frame || isLoading())
return;
ASSERT(this == frameLoader()->activeDocumentLoader());
m_frame->document()->domWindow()->finishedLoading();
}
void DocumentLoader::applyPoliciesToSettings()
{
if (!m_frame) {
ASSERT_NOT_REACHED();
return;
}
if (!m_frame->isMainFrame())
return;
#if ENABLE(MEDIA_SOURCE)
m_frame->settings().setMediaSourceEnabled(m_mediaSourcePolicy == MediaSourcePolicy::Default ? Settings::platformDefaultMediaSourceEnabled() : m_mediaSourcePolicy == MediaSourcePolicy::Enable);
#endif
#if ENABLE(TEXT_AUTOSIZING)
m_frame->settings().setIdempotentModeAutosizingOnlyHonorsPercentages(m_idempotentModeAutosizingOnlyHonorsPercentages);
#endif
}
void DocumentLoader::attachToFrame(Frame& frame)
{
if (m_frame == &frame)
return;
ASSERT(!m_frame);
observeFrame(&frame);
m_writer.setFrame(frame);
attachToFrame();
#if ASSERT_ENABLED
m_hasEverBeenAttached = true;
#endif
applyPoliciesToSettings();
}
void DocumentLoader::attachToFrame()
{
ASSERT(m_frame);
}
void DocumentLoader::detachFromFrame()
{
#if ASSERT_ENABLED
if (m_hasEverBeenAttached)
ASSERT_WITH_MESSAGE(m_frame, "detachFromFrame() is being called on a DocumentLoader twice without an attachToFrame() inbetween");
else
ASSERT_WITH_MESSAGE(m_frame, "detachFromFrame() is being called on a DocumentLoader that has never attached to any Frame");
#endif
RefPtr<Frame> protectedFrame(m_frame);
Ref<DocumentLoader> protectedThis(*this);
// It never makes sense to have a document loader that is detached from its
// frame have any loads active, so kill all the loads.
stopLoading();
if (m_mainResource && m_mainResource->hasClient(*this))
m_mainResource->removeClient(*this);
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilter)
m_contentFilter->stopFilteringMainResource();
#endif
m_applicationCacheHost->setDOMApplicationCache(nullptr);
cancelPolicyCheckIfNeeded();
// cancelPolicyCheckIfNeeded can clear m_frame if the policy check
// is stopped, resulting in a recursive call into this detachFromFrame.
// If m_frame is nullptr after cancelPolicyCheckIfNeeded, our work is
// already done so just return.
if (!m_frame)
return;
InspectorInstrumentation::loaderDetachedFromFrame(*m_frame, *this);
observeFrame(nullptr);
}
void DocumentLoader::clearMainResourceLoader()
{
m_loadingMainResource = false;
auto* frameLoader = this->frameLoader();
if (!frameLoader)
return;
if (this == frameLoader->activeDocumentLoader())
checkLoadComplete();
}
#if ENABLE(APPLICATION_MANIFEST)
uint64_t DocumentLoader::loadApplicationManifest()
{
static uint64_t nextCallbackID = 1;
auto* document = this->document();
if (!document)
return 0;
if (!m_frame->isMainFrame())
return 0;
if (document->url().isEmpty() || document->url().protocolIsAbout())
return 0;
auto head = document->head();
if (!head)
return 0;
URL manifestURL;
bool useCredentials = false;
for (const auto& link : childrenOfType<HTMLLinkElement>(*head)) {
if (link.isApplicationManifest()) {
manifestURL = link.href();
useCredentials = equalIgnoringASCIICase(link.attributeWithoutSynchronization(HTMLNames::crossoriginAttr), "use-credentials");
break;
}
}
if (manifestURL.isEmpty() || !manifestURL.isValid())
return 0;
auto manifestLoader = makeUnique<ApplicationManifestLoader>(*this, manifestURL, useCredentials);
auto* rawManifestLoader = manifestLoader.get();
auto callbackID = nextCallbackID++;
m_applicationManifestLoaders.set(WTFMove(manifestLoader), callbackID);
if (!rawManifestLoader->startLoading()) {
m_applicationManifestLoaders.remove(rawManifestLoader);
return 0;
}
return callbackID;
}
void DocumentLoader::finishedLoadingApplicationManifest(ApplicationManifestLoader& loader)
{
// If the DocumentLoader has detached from its frame, all manifest loads should have already been canceled.
ASSERT(m_frame);
auto callbackIdentifier = m_applicationManifestLoaders.get(&loader);
notifyFinishedLoadingApplicationManifest(callbackIdentifier, loader.processManifest());
m_applicationManifestLoaders.remove(&loader);
}
void DocumentLoader::notifyFinishedLoadingApplicationManifest(uint64_t callbackIdentifier, Optional<ApplicationManifest> manifest)
{
RELEASE_ASSERT(callbackIdentifier);
RELEASE_ASSERT(m_frame);
m_frame->loader().client().finishedLoadingApplicationManifest(callbackIdentifier, manifest);
}
#endif
bool DocumentLoader::isLoadingInAPISense() const
{
// Once a frame has loaded, we no longer need to consider subresources,
// but we still need to consider subframes.
if (frameLoader()->state() != FrameStateComplete) {
if (m_frame->settings().needsIsLoadingInAPISenseQuirk() && !m_subresourceLoaders.isEmpty())
return true;
ASSERT(m_frame->document());
auto& document = *m_frame->document();
if ((isLoadingMainResource() || !document.loadEventFinished()) && isLoading())
return true;
if (m_cachedResourceLoader->requestCount())
return true;
if (document.isDelayingLoadEvent())
return true;
if (document.processingLoadEvent())
return true;
if (document.hasActiveParser())
return true;
auto* scriptableParser = document.scriptableDocumentParser();
if (scriptableParser && scriptableParser->hasScriptsWaitingForStylesheets())
return true;
}
return frameLoader()->subframeIsLoading();
}
bool DocumentLoader::maybeCreateArchive()
{
#if !ENABLE(WEB_ARCHIVE) && !ENABLE(MHTML)
return false;
#else
// Give the archive machinery a crack at this document. If the MIME type is not an archive type, it will return 0.
m_archive = ArchiveFactory::create(m_response.url(), mainResourceData().get(), m_response.mimeType());
if (!m_archive)
return false;
addAllArchiveResources(*m_archive);
ASSERT(m_archive->mainResource());
auto& mainResource = *m_archive->mainResource();
m_parsedArchiveData = &mainResource.data();
m_writer.setMIMEType(mainResource.mimeType());
ASSERT(m_frame->document());
commitData(mainResource.data().data(), mainResource.data().size());
return true;
#endif
}
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
void DocumentLoader::setArchive(Ref<Archive>&& archive)
{
m_archive = WTFMove(archive);
addAllArchiveResources(*m_archive);
}
void DocumentLoader::addAllArchiveResources(Archive& archive)
{
if (!m_archiveResourceCollection)
m_archiveResourceCollection = makeUnique<ArchiveResourceCollection>();
m_archiveResourceCollection->addAllResources(archive);
}
// FIXME: Adding a resource directly to a DocumentLoader/ArchiveResourceCollection seems like bad design, but is API some apps rely on.
// Can we change the design in a manner that will let us deprecate that API without reducing functionality of those apps?
void DocumentLoader::addArchiveResource(Ref<ArchiveResource>&& resource)
{
if (!m_archiveResourceCollection)
m_archiveResourceCollection = makeUnique<ArchiveResourceCollection>();
m_archiveResourceCollection->addResource(WTFMove(resource));
}
RefPtr<Archive> DocumentLoader::popArchiveForSubframe(const String& frameName, const URL& url)
{
return m_archiveResourceCollection ? m_archiveResourceCollection->popSubframeArchive(frameName, url) : nullptr;
}
void DocumentLoader::clearArchiveResources()
{
m_archiveResourceCollection = nullptr;
m_substituteResourceDeliveryTimer.stop();
}
SharedBuffer* DocumentLoader::parsedArchiveData() const
{
return m_parsedArchiveData.get();
}
#endif // ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
ArchiveResource* DocumentLoader::archiveResourceForURL(const URL& url) const
{
if (!m_archiveResourceCollection)
return nullptr;
auto* resource = m_archiveResourceCollection->archiveResourceForURL(url);
if (!resource || resource->shouldIgnoreWhenUnarchiving())
return nullptr;
return resource;
}
RefPtr<ArchiveResource> DocumentLoader::mainResource() const
{
RefPtr<SharedBuffer> data = mainResourceData();
if (!data)
data = SharedBuffer::create();
auto& response = this->response();
return ArchiveResource::create(WTFMove(data), response.url(), response.mimeType(), response.textEncodingName(), frame()->tree().uniqueName());
}
RefPtr<ArchiveResource> DocumentLoader::subresource(const URL& url) const
{
if (!isCommitted())
return nullptr;
auto* resource = m_cachedResourceLoader->cachedResource(url);
if (!resource || !resource->isLoaded())
return archiveResourceForURL(url);
if (resource->type() == CachedResource::Type::MainResource)
return nullptr;
auto* data = resource->resourceBuffer();
if (!data)
return nullptr;
return ArchiveResource::create(data, url, resource->response());
}
Vector<Ref<ArchiveResource>> DocumentLoader::subresources() const
{
if (!isCommitted())
return { };
Vector<Ref<ArchiveResource>> subresources;
for (auto& handle : m_cachedResourceLoader->allCachedResources().values()) {
if (auto subresource = this->subresource(handle->url()))
subresources.append(subresource.releaseNonNull());
}
return subresources;
}
void DocumentLoader::deliverSubstituteResourcesAfterDelay()
{
if (m_pendingSubstituteResources.isEmpty())
return;
ASSERT(m_frame);
ASSERT(m_frame->page());
if (m_frame->page()->defersLoading())
return;
if (!m_substituteResourceDeliveryTimer.isActive())
m_substituteResourceDeliveryTimer.startOneShot(0_s);
}
void DocumentLoader::substituteResourceDeliveryTimerFired()
{
if (m_pendingSubstituteResources.isEmpty())
return;
ASSERT(m_frame);
ASSERT(m_frame->page());
if (m_frame->page()->defersLoading())
return;
auto pendingSubstituteResources = WTFMove(m_pendingSubstituteResources);
for (auto& pendingSubstituteResource : pendingSubstituteResources) {
auto& loader = pendingSubstituteResource.key;
if (auto& resource = pendingSubstituteResource.value)
resource->deliver(*loader);
else {
// A null resource means that we should fail the load.
// FIXME: Maybe we should use another error here - something like "not in cache".
loader->didFail(loader->cannotShowURLError());
}
}
}
#if ASSERT_ENABLED
bool DocumentLoader::isSubstituteLoadPending(ResourceLoader* loader) const
{
return m_pendingSubstituteResources.contains(loader);
}
#endif // ASSERT_ENABLED
void DocumentLoader::cancelPendingSubstituteLoad(ResourceLoader* loader)
{
if (m_pendingSubstituteResources.isEmpty())
return;
m_pendingSubstituteResources.remove(loader);
if (m_pendingSubstituteResources.isEmpty())
m_substituteResourceDeliveryTimer.stop();
}
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
bool DocumentLoader::scheduleArchiveLoad(ResourceLoader& loader, const ResourceRequest& request)
{
if (auto* resource = archiveResourceForURL(request.url())) {
scheduleSubstituteResourceLoad(loader, *resource);
return true;
}
if (!m_archive)
return false;
#if ENABLE(WEB_ARCHIVE)
// The idea of WebArchiveDebugMode is that we should fail instead of trying to fetch from the network.
// Returning true ensures the caller will not try to fetch from the network.
if (m_frame->settings().webArchiveDebugModeEnabled() && responseMIMEType() == "application/x-webarchive")
return true;
#endif
// If we want to load from the archive only, then we should always return true so that the caller
// does not try to fetch form the network.
return m_archive->shouldLoadFromArchiveOnly();
}
#endif
void DocumentLoader::scheduleSubstituteResourceLoad(ResourceLoader& loader, SubstituteResource& resource)
{
#if ENABLE(SERVICE_WORKER)
ASSERT(!loader.options().serviceWorkerRegistrationIdentifier);
#endif
m_pendingSubstituteResources.set(&loader, &resource);
deliverSubstituteResourcesAfterDelay();
}
void DocumentLoader::scheduleCannotShowURLError(ResourceLoader& loader)
{
m_pendingSubstituteResources.set(&loader, nullptr);
deliverSubstituteResourcesAfterDelay();
}
void DocumentLoader::addResponse(const ResourceResponse& response)
{
if (!m_stopRecordingResponses)
m_responses.append(response);
}
void DocumentLoader::stopRecordingResponses()
{
m_stopRecordingResponses = true;
m_responses.shrinkToFit();
}
void DocumentLoader::setCustomHeaderFields(Vector<CustomHeaderFields>&& fields)
{
m_customHeaderFields = WTFMove(fields);
}
void DocumentLoader::setTitle(const StringWithDirection& title)
{
if (m_pageTitle == title)
return;
frameLoader()->willChangeTitle(this);
m_pageTitle = title;
frameLoader()->didChangeTitle(this);
}
URL DocumentLoader::urlForHistory() const
{
// Return the URL to be used for history and B/F list.
// Returns nil for WebDataProtocol URLs that aren't alternates
// for unreachable URLs, because these can't be stored in history.
if (m_substituteData.isValid() && !m_substituteData.shouldRevealToSessionHistory())
return unreachableURL();
return m_originalRequestCopy.url();
}
bool DocumentLoader::urlForHistoryReflectsFailure() const
{
return m_substituteData.isValid() || m_response.httpStatusCode() >= 400;
}
URL DocumentLoader::documentURL() const
{
URL url = substituteData().response().url();
#if ENABLE(WEB_ARCHIVE)
if (url.isEmpty() && m_archive && m_archive->shouldUseMainResourceURL())
url = m_archive->mainResource()->url();
#endif
if (url.isEmpty())
url = m_request.url();
if (url.isEmpty())
url = m_response.url();
return url;
}
#if PLATFORM(IOS_FAMILY)
// FIXME: This method seems to violate the encapsulation of this class.
void DocumentLoader::setResponseMIMEType(const String& responseMimeType)
{
m_response.setMimeType(responseMimeType);
}
#endif
void DocumentLoader::setDefersLoading(bool defers)
{
// Multiple frames may be loading the same main resource simultaneously. If deferral state changes,
// each frame's DocumentLoader will try to send a setDefersLoading() to the same underlying ResourceLoader. Ensure only
// the "owning" DocumentLoader does so, as setDefersLoading() is not resilient to setting the same value repeatedly.
if (mainResourceLoader() && mainResourceLoader()->documentLoader() == this)
mainResourceLoader()->setDefersLoading(defers);
setAllDefersLoading(m_subresourceLoaders, defers);
setAllDefersLoading(m_plugInStreamLoaders, defers);
if (!defers)
deliverSubstituteResourcesAfterDelay();
}
void DocumentLoader::setMainResourceDataBufferingPolicy(DataBufferingPolicy dataBufferingPolicy)
{
if (m_mainResource)
m_mainResource->setDataBufferingPolicy(dataBufferingPolicy);
}
void DocumentLoader::stopLoadingPlugIns()
{
cancelAll(m_plugInStreamLoaders);
}
void DocumentLoader::stopLoadingSubresources()
{
cancelAll(m_subresourceLoaders);
ASSERT(m_subresourceLoaders.isEmpty());
}
void DocumentLoader::addSubresourceLoader(ResourceLoader* loader)
{
// The main resource's underlying ResourceLoader will ask to be added here.
// It is much simpler to handle special casing of main resource loads if we don't
// let it be added. In the main resource load case, mainResourceLoader()
// will still be null at this point, but m_gotFirstByte should be false here if and only
// if we are just starting the main resource load.
if (!m_gotFirstByte)
return;
ASSERT(loader->identifier());
ASSERT(!m_subresourceLoaders.contains(loader->identifier()));
ASSERT(!mainResourceLoader() || mainResourceLoader() != loader);
// Application Cache loaders are handled by their ApplicationCacheGroup directly.
if (loader->options().applicationCacheMode == ApplicationCacheMode::Bypass)
return;
#if ASSERT_ENABLED
if (document()) {
switch (document()->backForwardCacheState()) {
case Document::NotInBackForwardCache:
break;
case Document::AboutToEnterBackForwardCache: {
// A page about to enter the BackForwardCache should only be able to start ping loads.
auto* cachedResource = MemoryCache::singleton().resourceForRequest(loader->request(), loader->frameLoader()->frame().page()->sessionID());
ASSERT(cachedResource && CachedResource::shouldUsePingLoad(cachedResource->type()));
break;
}
case Document::InBackForwardCache:
// A page in the BackForwardCache should not be able to start loads.
ASSERT_NOT_REACHED();
break;
}
}
#endif
m_subresourceLoaders.add(loader->identifier(), loader);
}
void DocumentLoader::removeSubresourceLoader(LoadCompletionType type, ResourceLoader* loader)
{
ASSERT(loader->identifier());
if (!m_subresourceLoaders.remove(loader->identifier()))
return;
checkLoadComplete();
if (Frame* frame = m_frame)
frame->loader().subresourceLoadDone(type);
}
void DocumentLoader::addPlugInStreamLoader(ResourceLoader& loader)
{
ASSERT(loader.identifier());
ASSERT(!m_plugInStreamLoaders.contains(loader.identifier()));
m_plugInStreamLoaders.add(loader.identifier(), &loader);
}
void DocumentLoader::removePlugInStreamLoader(ResourceLoader& loader)
{
ASSERT(loader.identifier());
ASSERT(&loader == m_plugInStreamLoaders.get(loader.identifier()));
m_plugInStreamLoaders.remove(loader.identifier());
checkLoadComplete();
}
bool DocumentLoader::isMultipartReplacingLoad() const
{
return isLoadingMultipartContent() && frameLoader()->isReplacing();
}
bool DocumentLoader::maybeLoadEmpty()
{
bool shouldLoadEmpty = !m_substituteData.isValid() && (m_request.url().isEmpty() || LegacySchemeRegistry::shouldLoadURLSchemeAsEmptyDocument(m_request.url().protocol().toStringWithoutCopying()));
if (!shouldLoadEmpty && !frameLoader()->client().representationExistsForURLScheme(m_request.url().protocol().toStringWithoutCopying()))
return false;
if (m_request.url().isEmpty() && !frameLoader()->stateMachine().creatingInitialEmptyDocument()) {
m_request.setURL(aboutBlankURL());
if (isLoadingMainResource())
frameLoader()->client().dispatchDidChangeProvisionalURL();
}
String mimeType = shouldLoadEmpty ? "text/html" : frameLoader()->client().generatedMIMETypeForURLScheme(m_request.url().protocol().toStringWithoutCopying());
m_response = ResourceResponse(m_request.url(), mimeType, 0, String());
finishedLoading();
return true;
}
void DocumentLoader::startLoadingMainResource()
{
m_mainDocumentError = ResourceError();
timing().markStartTimeAndFetchStart();
ASSERT(!m_mainResource);
ASSERT(!m_loadingMainResource);
m_loadingMainResource = true;
Ref<DocumentLoader> protectedThis(*this);
if (maybeLoadEmpty()) {
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource: Returning empty document");
return;
}
#if ENABLE(CONTENT_FILTERING)
m_contentFilter = !m_substituteData.isValid() ? ContentFilter::create(*this) : nullptr;
#endif
// Make sure we re-apply the user agent to the Document's ResourceRequest upon reload in case the embedding
// application has changed it, by clearing the previous user agent value here and applying the new value in CachedResourceLoader.
m_request.clearHTTPUserAgent();
ASSERT(timing().startTime());
ASSERT(timing().fetchStart());
willSendRequest(ResourceRequest(m_request), ResourceResponse(), [this, protectedThis = WTFMove(protectedThis)] (ResourceRequest&& request) mutable {
m_request = request;
// FIXME: Implement local URL interception by getting the service worker of the parent.
// willSendRequest() may lead to our Frame being detached or cancelling the load via nulling the ResourceRequest.
if (!m_frame || m_request.isNull()) {
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource: Load canceled after willSendRequest");
return;
}
request.setRequester(ResourceRequest::Requester::Main);
// If this is a reload the cache layer might have made the previous request conditional. DocumentLoader can't handle 304 responses itself.
request.makeUnconditional();
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource: Starting load");
#if ENABLE(SERVICE_WORKER)
if (m_applicationCacheHost->canLoadMainResource(request) || m_substituteData.isValid()) {
auto url = request.url();
matchRegistration(url, [request = WTFMove(request), protectedThis = WTFMove(protectedThis), this] (auto&& registrationData) mutable {
if (!m_mainDocumentError.isNull()) {
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource callback: Load canceled because of main document error (type = %d, code = %d)", static_cast<int>(m_mainDocumentError.type()), m_mainDocumentError.errorCode());
return;
}
if (!m_frame) {
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource callback: Load canceled because no frame");
return;
}
m_serviceWorkerRegistrationData = WTFMove(registrationData);
// Prefer existing substitute data (from WKWebView.loadData etc) over service worker fetch.
if (this->tryLoadingSubstituteData()) {
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource callback: Load canceled because of substitute data");
return;
}
if (!m_serviceWorkerRegistrationData && this->tryLoadingRequestFromApplicationCache()) {
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource callback: Loaded from Application Cache");
return;
}
this->loadMainResource(WTFMove(request));
});
return;
}
#else
if (tryLoadingRequestFromApplicationCache()) {
RELEASE_LOG_IF_ALLOWED("startLoadingMainResource: Loaded from Application Cache");
return;
}
#endif
loadMainResource(WTFMove(request));
});
}
void DocumentLoader::unregisterTemporaryServiceWorkerClient()
{
#if ENABLE(SERVICE_WORKER)
if (!m_temporaryServiceWorkerClient || !RuntimeEnabledFeatures::sharedFeatures().serviceWorkerEnabled())
return;
auto& serviceWorkerConnection = ServiceWorkerProvider::singleton().serviceWorkerConnection();
serviceWorkerConnection.unregisterServiceWorkerClient(*m_temporaryServiceWorkerClient);
#endif
}
void DocumentLoader::loadMainResource(ResourceRequest&& request)
{
ResourceLoaderOptions mainResourceLoadOptions(
SendCallbackPolicy::SendCallbacks,
ContentSniffingPolicy::SniffContent,
DataBufferingPolicy::BufferData,
StoredCredentialsPolicy::Use,
ClientCredentialPolicy::MayAskClientForCredentials,
FetchOptions::Credentials::Include,
SecurityCheckPolicy::SkipSecurityCheck,
FetchOptions::Mode::Navigate,
CertificateInfoPolicy::IncludeCertificateInfo,
ContentSecurityPolicyImposition::SkipPolicyCheck,
DefersLoadingPolicy::AllowDefersLoading,
CachingPolicy::AllowCaching);
#if ENABLE(SERVICE_WORKER)
if (!m_temporaryServiceWorkerClient) {
// The main navigation load will trigger the registration of the temp client.
m_temporaryServiceWorkerClient = DocumentIdentifier::generate();
ASSERT(!temporaryIdentifierToLoaderMap().contains(*m_temporaryServiceWorkerClient));
temporaryIdentifierToLoaderMap().add(*m_temporaryServiceWorkerClient, this);
}
mainResourceLoadOptions.clientIdentifier = m_temporaryServiceWorkerClient;
#endif
CachedResourceRequest mainResourceRequest(WTFMove(request), mainResourceLoadOptions);
if (!m_frame->isMainFrame() && m_frame->document()) {
// If we are loading the main resource of a subframe, use the cache partition of the main document.
mainResourceRequest.setDomainForCachePartition(*m_frame->document());
} else {
auto origin = SecurityOrigin::create(mainResourceRequest.resourceRequest().url());
origin->setStorageBlockingPolicy(frameLoader()->frame().settings().storageBlockingPolicy());
mainResourceRequest.setDomainForCachePartition(origin->domainForCachePartition());
}
m_mainResource = m_cachedResourceLoader->requestMainResource(WTFMove(mainResourceRequest)).value_or(nullptr);
if (!m_mainResource) {
// The frame may have gone away if this load was cancelled synchronously and this was the last pending load.
// This is because we may have fired the load event in a parent frame.
if (!m_frame) {
RELEASE_LOG_IF_ALLOWED("loadMainResource: Unable to load main resource, frame has gone away");
return;
}
if (!m_request.url().isValid()) {
RELEASE_LOG_IF_ALLOWED("loadMainResource: Unable to load main resource, URL is invalid");
cancelMainResourceLoad(frameLoader()->client().cannotShowURLError(m_request));
return;
}
RELEASE_LOG_IF_ALLOWED("loadMainResource: Unable to load main resource, returning empty document");
setRequest(ResourceRequest());
// If the load was aborted by clearing m_request, it's possible the ApplicationCacheHost
// is now in a state where starting an empty load will be inconsistent. Replace it with
// a new ApplicationCacheHost.
m_applicationCacheHost = makeUnique<ApplicationCacheHost>(*this);
maybeLoadEmpty();
return;
}
ASSERT(m_frame);
#if ENABLE(CONTENT_EXTENSIONS)
if (m_mainResource->errorOccurred() && m_frame->page() && m_mainResource->resourceError().domain() == ContentExtensions::WebKitContentBlockerDomain) {
RELEASE_LOG_IF_ALLOWED("loadMainResource: Blocked by content blocker error");
cancelMainResourceLoad(frameLoader()->blockedByContentBlockerError(m_request));
return;
}
#endif
if (!mainResourceLoader()) {
m_identifierForLoadWithoutResourceLoader = m_frame->page()->progress().createUniqueIdentifier();
frameLoader()->notifier().assignIdentifierToInitialRequest(m_identifierForLoadWithoutResourceLoader, this, mainResourceRequest.resourceRequest());
frameLoader()->notifier().dispatchWillSendRequest(this, m_identifierForLoadWithoutResourceLoader, mainResourceRequest.resourceRequest(), ResourceResponse());
}
becomeMainResourceClient();
// A bunch of headers are set when the underlying ResourceLoader is created, and m_request needs to include those.
ResourceRequest updatedRequest = mainResourceLoader() ? mainResourceLoader()->originalRequest() : mainResourceRequest.resourceRequest();
// If there was a fragment identifier on m_request, the cache will have stripped it. m_request should include
// the fragment identifier, so add that back in.
if (equalIgnoringFragmentIdentifier(m_request.url(), updatedRequest.url()))
updatedRequest.setURL(m_request.url());
setRequest(updatedRequest);
}
void DocumentLoader::cancelPolicyCheckIfNeeded()
{
if (m_waitingForContentPolicy || m_waitingForNavigationPolicy) {
RELEASE_ASSERT(frameLoader());
frameLoader()->policyChecker().stopCheck();
m_waitingForContentPolicy = false;
m_waitingForNavigationPolicy = false;
}
}
void DocumentLoader::cancelMainResourceLoad(const ResourceError& resourceError)
{
Ref<DocumentLoader> protectedThis(*this);
ResourceError error = resourceError.isNull() ? frameLoader()->cancelledError(m_request) : resourceError;
RELEASE_LOG_IF_ALLOWED("cancelMainResourceLoad: (type = %d, code = %d)", static_cast<int>(error.type()), error.errorCode());
m_dataLoadTimer.stop();
cancelPolicyCheckIfNeeded();
if (mainResourceLoader())
mainResourceLoader()->cancel(error);
clearMainResource();
mainReceivedError(error);
}
void DocumentLoader::willContinueMainResourceLoadAfterRedirect(const ResourceRequest& newRequest)
{
setRequest(newRequest);
}
void DocumentLoader::clearMainResource()
{
ASSERT(isMainThread());
if (m_mainResource && m_mainResource->hasClient(*this))
m_mainResource->removeClient(*this);
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilter)
m_contentFilter->stopFilteringMainResource();
#endif
m_mainResource = nullptr;
unregisterTemporaryServiceWorkerClient();
}
void DocumentLoader::subresourceLoaderFinishedLoadingOnePart(ResourceLoader* loader)
{
unsigned long identifier = loader->identifier();
ASSERT(identifier);
if (!m_multipartSubresourceLoaders.add(identifier, loader).isNewEntry) {
ASSERT(m_multipartSubresourceLoaders.get(identifier) == loader);
ASSERT(!m_subresourceLoaders.contains(identifier));
} else {
ASSERT(m_subresourceLoaders.contains(identifier));
m_subresourceLoaders.remove(identifier);
}
checkLoadComplete();
if (Frame* frame = m_frame)
frame->loader().checkLoadComplete();
}
void DocumentLoader::maybeFinishLoadingMultipartContent()
{
if (!isMultipartReplacingLoad())
return;
frameLoader()->setupForReplace();
m_committed = false;
RefPtr<SharedBuffer> resourceData = mainResourceData();
commitLoad(resourceData->data(), resourceData->size());
}
void DocumentLoader::startIconLoading()
{
static uint64_t nextIconCallbackID = 1;
auto* document = this->document();
if (!document)
return;
if (!m_frame->isMainFrame())
return;
if (document->url().isEmpty() || document->url().protocolIsAbout())
return;
m_linkIcons = LinkIconCollector { *document }.iconsOfTypes({ LinkIconType::Favicon, LinkIconType::TouchIcon, LinkIconType::TouchPrecomposedIcon });
auto findResult = m_linkIcons.findMatching([](auto& icon) { return icon.type == LinkIconType::Favicon; });
if (findResult == notFound)
m_linkIcons.append({ document->completeURL("/favicon.ico"_s), LinkIconType::Favicon, String(), WTF::nullopt, { } });
if (!m_linkIcons.size())
return;
Vector<std::pair<WebCore::LinkIcon&, uint64_t>> iconDecisions;
iconDecisions.reserveInitialCapacity(m_linkIcons.size());
for (auto& icon : m_linkIcons) {
auto result = m_iconsPendingLoadDecision.add(nextIconCallbackID++, icon);
iconDecisions.uncheckedAppend({ icon, result.iterator->key });
}
m_frame->loader().client().getLoadDecisionForIcons(iconDecisions);
}
void DocumentLoader::didGetLoadDecisionForIcon(bool decision, uint64_t loadIdentifier, uint64_t newCallbackID)
{
auto icon = m_iconsPendingLoadDecision.take(loadIdentifier);
// If the decision was not to load or this DocumentLoader is already detached, there is no load to perform.
if (!decision || !m_frame)
return;
// If the LinkIcon we just took is empty, then the DocumentLoader had all of its loaders stopped
// while this icon load decision was pending.
// In this case we need to notify the client that the icon finished loading with empty data.
if (icon.url.isEmpty()) {
notifyFinishedLoadingIcon(newCallbackID, nullptr);
return;
}
auto iconLoader = makeUnique<IconLoader>(*this, icon.url);
auto* rawIconLoader = iconLoader.get();
m_iconLoaders.set(WTFMove(iconLoader), newCallbackID);
rawIconLoader->startLoading();
}
void DocumentLoader::finishedLoadingIcon(IconLoader& loader, SharedBuffer* buffer)
{
// If the DocumentLoader has detached from its frame, all icon loads should have already been cancelled.
ASSERT(m_frame);
auto callbackIdentifier = m_iconLoaders.take(&loader);
notifyFinishedLoadingIcon(callbackIdentifier, buffer);
}
void DocumentLoader::notifyFinishedLoadingIcon(uint64_t callbackIdentifier, SharedBuffer* buffer)
{
RELEASE_ASSERT(callbackIdentifier);
RELEASE_ASSERT(m_frame);
m_frame->loader().client().finishedLoadingIcon(callbackIdentifier, buffer);
}
void DocumentLoader::dispatchOnloadEvents()
{
m_wasOnloadDispatched = true;
m_applicationCacheHost->stopDeferringEvents();
}
void DocumentLoader::setTriggeringAction(NavigationAction&& action)
{
m_triggeringAction = WTFMove(action);
m_triggeringAction.setShouldOpenExternalURLsPolicy(m_frame ? shouldOpenExternalURLsPolicyToPropagate() : m_shouldOpenExternalURLsPolicy);
}
ShouldOpenExternalURLsPolicy DocumentLoader::shouldOpenExternalURLsPolicyToPropagate() const
{
if (!m_frame)
return ShouldOpenExternalURLsPolicy::ShouldNotAllow;
if (m_frame->isMainFrame())
return m_shouldOpenExternalURLsPolicy;
if (auto* currentDocument = document()) {
if (currentDocument->securityOrigin().isSameOriginAs(currentDocument->topOrigin()))
return m_shouldOpenExternalURLsPolicy;
}
return ShouldOpenExternalURLsPolicy::ShouldNotAllow;
}
void DocumentLoader::becomeMainResourceClient()
{
#if ENABLE(CONTENT_FILTERING)
if (m_contentFilter)
m_contentFilter->startFilteringMainResource(*m_mainResource);
#endif
m_mainResource->addClient(*this);
}
#if ENABLE(CONTENT_EXTENSIONS)
void DocumentLoader::addPendingContentExtensionSheet(const String& identifier, StyleSheetContents& sheet)
{
ASSERT(!m_gotFirstByte);
m_pendingNamedContentExtensionStyleSheets.set(identifier, &sheet);
}
void DocumentLoader::addPendingContentExtensionDisplayNoneSelector(const String& identifier, const String& selector, uint32_t selectorID)
{
ASSERT(!m_gotFirstByte);
auto addResult = m_pendingContentExtensionDisplayNoneSelectors.add(identifier, Vector<std::pair<String, uint32_t>>());
addResult.iterator->value.append(std::make_pair(selector, selectorID));
}
#endif
bool DocumentLoader::isAlwaysOnLoggingAllowed() const
{
return !m_frame || m_frame->isAlwaysOnLoggingAllowed();
}
#if USE(QUICK_LOOK)
void DocumentLoader::previewResponseReceived(CachedResource& resource, const ResourceResponse& response)
{
ASSERT_UNUSED(resource, m_mainResource == &resource);
m_response = response;
}
void DocumentLoader::setPreviewConverter(RefPtr<PreviewConverter>&& previewConverter)
{
m_previewConverter = WTFMove(previewConverter);
}
PreviewConverter* DocumentLoader::previewConverter() const
{
return m_previewConverter.get();
}
#endif
void DocumentLoader::addConsoleMessage(MessageSource messageSource, MessageLevel messageLevel, const String& message, unsigned long requestIdentifier)
{
static_cast<ScriptExecutionContext*>(m_frame->document())->addConsoleMessage(messageSource, messageLevel, message, requestIdentifier);
}
void DocumentLoader::sendCSPViolationReport(URL&& reportURL, Ref<FormData>&& report)
{
PingLoader::sendViolationReport(*m_frame, WTFMove(reportURL), WTFMove(report), ViolationReportType::ContentSecurityPolicy);
}
void DocumentLoader::enqueueSecurityPolicyViolationEvent(SecurityPolicyViolationEvent::Init&& eventInit)
{
m_frame->document()->enqueueSecurityPolicyViolationEvent(WTFMove(eventInit));
}
#if ENABLE(CONTENT_FILTERING)
void DocumentLoader::dataReceivedThroughContentFilter(const char* data, int size)
{
dataReceived(data, size);
}
void DocumentLoader::cancelMainResourceLoadForContentFilter(const ResourceError& error)
{
cancelMainResourceLoad(error);
}
void DocumentLoader::handleProvisionalLoadFailureFromContentFilter(const URL& blockedPageURL, SubstituteData& substituteData)
{
frameLoader()->load(FrameLoadRequest(*frame(), blockedPageURL, substituteData));
}
ResourceError DocumentLoader::contentFilterDidBlock(ContentFilterUnblockHandler unblockHandler, WTF::String&& unblockRequestDeniedScript)
{
unblockHandler.setUnreachableURL(documentURL());
if (!unblockRequestDeniedScript.isEmpty() && frame()) {
unblockHandler.wrapWithDecisionHandler([scriptController = makeWeakPtr(frame()->script()), script = unblockRequestDeniedScript.isolatedCopy()](bool unblocked) {
if (!unblocked && scriptController)
scriptController->executeScriptIgnoringException(script);
});
}
frameLoader()->client().contentFilterDidBlockLoad(WTFMove(unblockHandler));
return frameLoader()->blockedByContentFilterError(request());
}
#endif // ENABLE(CONTENT_FILTERING)
} // namespace WebCore
#undef PAGE_ID
#undef FRAME_ID
#undef IS_MAIN_FRAME