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FrameLoader.cpp
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FrameLoader.cpp
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/*
* Copyright (C) 2006-2022 Apple Inc. All rights reserved.
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2008 Alp Toker <alp@atoker.com>
* Copyright (C) Research In Motion Limited 2009. All rights reserved.
* Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
* 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 "FrameLoader.h"
#include "AXObjectCache.h"
#include "ApplicationCacheHost.h"
#include "BackForwardCache.h"
#include "BackForwardController.h"
#include "BeforeUnloadEvent.h"
#include "CachePolicy.h"
#include "CachedPage.h"
#include "CachedResourceLoader.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "CommonVM.h"
#include "ContentFilter.h"
#include "ContentRuleListResults.h"
#include "ContentSecurityPolicy.h"
#include "CrossOriginAccessControl.h"
#include "CrossOriginEmbedderPolicy.h"
#include "DatabaseManager.h"
#include "DiagnosticLoggingClient.h"
#include "DiagnosticLoggingKeys.h"
#include "DiagnosticLoggingResultType.h"
#include "DocumentInlines.h"
#include "DocumentLoader.h"
#include "Editor.h"
#include "EditorClient.h"
#include "ElementInlines.h"
#include "Event.h"
#include "EventHandler.h"
#include "EventNames.h"
#include "FloatRect.h"
#include "FormState.h"
#include "FormSubmission.h"
#include "FrameLoadRequest.h"
#include "FrameLoaderClient.h"
#include "FrameNetworkingContext.h"
#include "FrameTree.h"
#include "GCController.h"
#include "HTMLFormElement.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "HTTPHeaderNames.h"
#include "HTTPHeaderValues.h"
#include "HTTPParsers.h"
#include "HistoryController.h"
#include "HistoryItem.h"
#include "IgnoreOpensDuringUnloadCountIncrementer.h"
#include "InspectorController.h"
#include "InspectorInstrumentation.h"
#include "LinkLoader.h"
#include "LoaderStrategy.h"
#include "LocalDOMWindow.h"
#include "LocalFrame.h"
#include "LocalFrameView.h"
#include "Logging.h"
#include "MemoryCache.h"
#include "MemoryRelease.h"
#include "NavigationDisabler.h"
#include "NavigationScheduler.h"
#include "Node.h"
#include "OriginAccessPatterns.h"
#include "Page.h"
#include "PageTransitionEvent.h"
#include "Performance.h"
#include "PerformanceLogging.h"
#include "PlatformStrategies.h"
#include "PluginData.h"
#include "PluginDocument.h"
#include "PolicyChecker.h"
#include "ProgressTracker.h"
#include "ReportingScope.h"
#include "ResourceHandle.h"
#include "ResourceLoadInfo.h"
#include "ResourceLoadObserver.h"
#include "ResourceRequest.h"
#include "SVGLocatable.h"
#include "SVGNames.h"
#include "SVGViewElement.h"
#include "SVGViewSpec.h"
#include "ScriptController.h"
#include "ScriptSourceCode.h"
#include "ScrollAnimator.h"
#include "SecurityOrigin.h"
#include "SecurityPolicy.h"
#include "SegmentedString.h"
#include "SerializedScriptValue.h"
#include "Settings.h"
#include "ShouldTreatAsContinuingLoad.h"
#include "StyleTreeResolver.h"
#include "SubframeLoader.h"
#include "SubresourceLoader.h"
#include "TextResourceDecoder.h"
#include "UserContentController.h"
#include "UserGestureIndicator.h"
#include "WindowFeatures.h"
#include "XMLDocumentParser.h"
#include <dom/ScriptDisallowedScope.h>
#include <wtf/CompletionHandler.h>
#include <wtf/URL.h>
#include <wtf/Ref.h>
#include <wtf/SetForScope.h>
#include <wtf/StdLibExtras.h>
#include <wtf/SystemTracing.h>
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
#include "Archive.h"
#endif
#if ENABLE(DATA_DETECTION)
#include "DataDetection.h"
#include "DataDetectionResultsStorage.h"
#endif
#if PLATFORM(IOS_FAMILY)
#include "DocumentType.h"
#include "ResourceLoader.h"
#include "RuntimeApplicationChecks.h"
#endif
#define PAGE_ID (valueOrDefault(pageID()).toUInt64())
#define FRAME_ID (frameID().object().toUInt64())
#define FRAMELOADER_RELEASE_LOG(channel, fmt, ...) RELEASE_LOG(channel, "%p - [pageID=%" PRIu64 ", frameID=%" PRIu64 ", isMainFrame=%d] FrameLoader::" fmt, this, PAGE_ID, FRAME_ID, m_frame.isMainFrame(), ##__VA_ARGS__)
#define FRAMELOADER_RELEASE_LOG_ERROR(channel, fmt, ...) RELEASE_LOG_ERROR(channel, "%p - [pageID=%" PRIu64 ", frameID=%" PRIu64 ", isMainFrame=%d] FrameLoader::" fmt, this, PAGE_ID, FRAME_ID, m_frame.isMainFrame(), ##__VA_ARGS__)
#if USE(APPLE_INTERNAL_SDK) && __has_include(<WebKitAdditions/FrameLoaderAdditions.h>)
#import <WebKitAdditions/FrameLoaderAdditions.h>
#else
namespace WebCore {
static void verifyUserAgent(const String&)
{
}
}
#endif
namespace WebCore {
using namespace HTMLNames;
using namespace SVGNames;
bool isBackForwardLoadType(FrameLoadType type)
{
switch (type) {
case FrameLoadType::Standard:
case FrameLoadType::Reload:
case FrameLoadType::ReloadFromOrigin:
case FrameLoadType::ReloadExpiredOnly:
case FrameLoadType::Same:
case FrameLoadType::RedirectWithLockedBackForwardList:
case FrameLoadType::Replace:
return false;
case FrameLoadType::Back:
case FrameLoadType::Forward:
case FrameLoadType::IndexedBackForward:
return true;
}
ASSERT_NOT_REACHED();
return false;
}
bool isReload(FrameLoadType type)
{
switch (type) {
case FrameLoadType::Reload:
case FrameLoadType::ReloadFromOrigin:
case FrameLoadType::ReloadExpiredOnly:
return true;
case FrameLoadType::Standard:
case FrameLoadType::Same:
case FrameLoadType::RedirectWithLockedBackForwardList:
case FrameLoadType::Replace:
case FrameLoadType::Back:
case FrameLoadType::Forward:
case FrameLoadType::IndexedBackForward:
return false;
}
ASSERT_NOT_REACHED();
return false;
}
// This is not in the FrameLoader class to emphasize that it does not depend on
// private FrameLoader data, and to avoid increasing the number of public functions
// with access to private data. Since only this .cpp file needs it, making it
// non-member lets us exclude it from the header file, thus keeping FrameLoader.h's
// API simpler.
//
static bool isDocumentSandboxed(LocalFrame& frame, SandboxFlags mask)
{
return frame.document() && frame.document()->isSandboxed(mask);
}
static bool isInVisibleAndActivePage(const LocalFrame& frame)
{
auto* page = frame.page();
return page && page->isVisibleAndActive();
}
class PageLevelForbidScope {
protected:
explicit PageLevelForbidScope(Page* page)
: m_page(page)
{
}
~PageLevelForbidScope() = default;
WeakPtr<Page> m_page;
};
struct ForbidPromptsScope : public PageLevelForbidScope {
explicit ForbidPromptsScope(Page* page)
: PageLevelForbidScope(page)
{
if (m_page)
m_page->forbidPrompts();
}
~ForbidPromptsScope()
{
if (m_page)
m_page->allowPrompts();
}
};
struct ForbidSynchronousLoadsScope : public PageLevelForbidScope {
explicit ForbidSynchronousLoadsScope(Page* page)
: PageLevelForbidScope(page)
{
if (m_page)
m_page->forbidSynchronousLoads();
}
~ForbidSynchronousLoadsScope()
{
if (m_page)
m_page->allowSynchronousLoads();
}
};
class FrameLoader::FrameProgressTracker {
WTF_MAKE_FAST_ALLOCATED;
public:
explicit FrameProgressTracker(LocalFrame& frame)
: m_frame(frame)
, m_inProgress(false)
{
}
~FrameProgressTracker()
{
if (m_inProgress && m_frame.page())
m_frame.page()->progress().progressCompleted(m_frame);
}
void progressStarted()
{
ASSERT(m_frame.page());
if (!m_inProgress)
m_frame.page()->progress().progressStarted(m_frame);
m_inProgress = true;
}
void progressCompleted()
{
ASSERT(m_inProgress);
ASSERT(m_frame.page());
m_inProgress = false;
m_frame.page()->progress().progressCompleted(m_frame);
platformStrategies()->loaderStrategy()->pageLoadCompleted(*m_frame.page());
}
private:
LocalFrame& m_frame;
bool m_inProgress;
};
FrameLoader::FrameLoader(LocalFrame& frame, UniqueRef<FrameLoaderClient>&& client)
: m_frame(frame)
, m_client(WTFMove(client))
, m_policyChecker(makeUnique<PolicyChecker>(frame))
, m_history(makeUnique<HistoryController>(frame))
, m_notifier(frame)
, m_subframeLoader(makeUnique<SubframeLoader>(frame))
, m_state(FrameState::Provisional)
, m_loadType(FrameLoadType::Standard)
, m_quickRedirectComing(false)
, m_sentRedirectNotification(false)
, m_inStopAllLoaders(false)
, m_isExecutingJavaScriptFormAction(false)
, m_didCallImplicitClose(true)
, m_wasUnloadEventEmitted(false)
, m_isComplete(false)
, m_needsClear(false)
, m_checkTimer(*this, &FrameLoader::checkTimerFired)
, m_shouldCallCheckCompleted(false)
, m_shouldCallCheckLoadComplete(false)
, m_opener(nullptr)
, m_loadingFromCachedPage(false)
, m_currentNavigationHasShownBeforeUnloadConfirmPanel(false)
, m_loadsSynchronously(false)
, m_forcedSandboxFlags(SandboxNone)
{
}
FrameLoader::~FrameLoader()
{
setOpener(nullptr);
detachFromAllOpenedFrames();
if (m_networkingContext)
m_networkingContext->invalidate();
}
void FrameLoader::detachFromAllOpenedFrames()
{
for (auto& frame : m_openedFrames)
if (auto* localFrame = dynamicDowncast<LocalFrame>(frame))
localFrame->loader().m_opener = nullptr;
m_openedFrames.clear();
}
void FrameLoader::init()
{
// This somewhat odd set of steps gives the frame an initial empty document.
setPolicyDocumentLoader(m_client->createDocumentLoader(ResourceRequest(URL({ }, emptyString())), SubstituteData()).ptr());
setProvisionalDocumentLoader(m_policyDocumentLoader.get());
m_provisionalDocumentLoader->startLoadingMainResource();
Ref protectedFrame { m_frame };
Ref document { *m_frame.document() };
document->cancelParsing();
m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocument);
m_networkingContext = m_client->createNetworkingContext();
m_progressTracker = makeUnique<FrameProgressTracker>(m_frame);
}
void FrameLoader::initForSynthesizedDocument(const URL&)
{
// FIXME: We need to initialize the document URL to the specified URL. Currently the URL is empty and hence
// FrameLoader::checkCompleted() will overwrite the URL of the document to be activeDocumentLoader()->documentURL().
auto loader = m_client->createDocumentLoader(ResourceRequest(URL({ }, emptyString())), SubstituteData());
loader->attachToFrame(m_frame);
loader->setResponse(ResourceResponse(URL(), "text/html"_s, 0, String()));
loader->setCommitted(true);
setDocumentLoader(loader.ptr());
m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocument);
m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit);
m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
m_client->transitionToCommittedForNewPage();
m_didCallImplicitClose = true;
m_isComplete = true;
m_state = FrameState::Complete;
m_needsClear = true;
m_networkingContext = m_client->createNetworkingContext();
m_progressTracker = makeUnique<FrameProgressTracker>(m_frame);
}
std::optional<PageIdentifier> FrameLoader::pageID() const
{
return m_frame.page() ? m_frame.page()->identifier() : std::nullopt;
}
FrameIdentifier FrameLoader::frameID() const
{
return m_frame.frameID();
}
Frame* FrameLoader::opener()
{
return m_opener.get();
}
const Frame* FrameLoader::opener() const
{
return m_opener.get();
}
void FrameLoader::setDefersLoading(bool defers)
{
if (m_documentLoader)
m_documentLoader->setDefersLoading(defers);
if (m_provisionalDocumentLoader)
m_provisionalDocumentLoader->setDefersLoading(defers);
if (m_policyDocumentLoader)
m_policyDocumentLoader->setDefersLoading(defers);
history().setDefersLoading(defers);
if (!defers) {
m_frame.navigationScheduler().startTimer();
startCheckCompleteTimer();
}
}
void FrameLoader::checkContentPolicy(const ResourceResponse& response, PolicyCheckIdentifier identifier, ContentPolicyDecisionFunction&& function)
{
if (!activeDocumentLoader()) {
// Load was cancelled
function(PolicyAction::Ignore, identifier);
return;
}
// FIXME: Validate the policy check identifier.
client().dispatchDecidePolicyForResponse(response, activeDocumentLoader()->request(), identifier, activeDocumentLoader()->downloadAttribute(), WTFMove(function));
}
bool FrameLoader::upgradeRequestforHTTPSOnlyIfNeeded(const URL& originalURL, ResourceRequest& request) const
{
auto& documentLoader = m_provisionalDocumentLoader ? m_provisionalDocumentLoader : m_documentLoader;
auto& newURL = request.url();
const auto& isSameSiteBypassEnabled = (originalURL.isEmpty()
|| (originalURL.protocolIs("http"_s) && RegistrableDomain(newURL) == RegistrableDomain(originalURL)))
&& documentLoader->networkConnectionIntegrityPolicy().contains(NetworkConnectionIntegrity::HTTPSOnlyExplicitlyBypassedForDomain);
if (documentLoader && documentLoader->networkConnectionIntegrityPolicy().contains(NetworkConnectionIntegrity::HTTPSOnly)
&& newURL.protocolIs("http"_s)
&& !isSameSiteBypassEnabled) {
FRAMELOADER_RELEASE_LOG(ResourceLoading, "upgradeRequestforHTTPSOnlyIfNeeded: upgrading navigation request");
request.upgradeToHTTPS();
// FIXME: Make this timeout adaptive based on network conditions
request.setTimeoutInterval(10);
return true;
}
return false;
}
void FrameLoader::changeLocation(const URL& url, const AtomString& passedTarget, Event* triggeringEvent, const ReferrerPolicy& referrerPolicy, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy, std::optional<NewFrameOpenerPolicy> openerPolicy, const AtomString& downloadAttribute, std::optional<PrivateClickMeasurement>&& privateClickMeasurement)
{
auto* frame = lexicalFrameFromCommonVM();
auto initiatedByMainFrame = frame && frame->isMainFrame() ? InitiatedByMainFrame::Yes : InitiatedByMainFrame::Unknown;
NewFrameOpenerPolicy newFrameOpenerPolicy = openerPolicy.value_or(referrerPolicy == ReferrerPolicy::NoReferrer ? NewFrameOpenerPolicy::Suppress : NewFrameOpenerPolicy::Allow);
FrameLoadRequest frameLoadRequest(*m_frame.document(), m_frame.document()->securityOrigin(), { url }, passedTarget, initiatedByMainFrame, downloadAttribute);
frameLoadRequest.setNewFrameOpenerPolicy(newFrameOpenerPolicy);
frameLoadRequest.setReferrerPolicy(referrerPolicy);
frameLoadRequest.setShouldOpenExternalURLsPolicy(shouldOpenExternalURLsPolicy);
frameLoadRequest.disableShouldReplaceDocumentIfJavaScriptURL();
changeLocation(WTFMove(frameLoadRequest), triggeringEvent, WTFMove(privateClickMeasurement));
}
void FrameLoader::changeLocation(FrameLoadRequest&& frameRequest, Event* triggeringEvent, std::optional<PrivateClickMeasurement>&& privateClickMeasurement)
{
FRAMELOADER_RELEASE_LOG(ResourceLoading, "changeLocation: frame load started");
ASSERT(frameRequest.resourceRequest().httpMethod() == "GET"_s);
Ref protectedFrame { m_frame };
if (frameRequest.frameName().isEmpty())
frameRequest.setFrameName(m_frame.document()->baseTarget());
auto currentURL { m_frame.document() ? m_frame.document()->url() : URL { } };
upgradeRequestforHTTPSOnlyIfNeeded(currentURL, frameRequest.resourceRequest());
m_frame.document()->contentSecurityPolicy()->upgradeInsecureRequestIfNeeded(frameRequest.resourceRequest(), ContentSecurityPolicy::InsecureRequestType::Navigation);
loadFrameRequest(WTFMove(frameRequest), triggeringEvent, { }, WTFMove(privateClickMeasurement));
}
void FrameLoader::submitForm(Ref<FormSubmission>&& submission)
{
ASSERT(submission->method() == FormSubmission::Method::Post || submission->method() == FormSubmission::Method::Get);
// FIXME: Find a good spot for these.
ASSERT(!submission->state().sourceDocument().frame() || submission->state().sourceDocument().frame() == &m_frame);
if (!m_frame.page())
return;
if (submission->action().isEmpty())
return;
if (isDocumentSandboxed(m_frame, SandboxForms)) {
// FIXME: This message should be moved off the console once a solution to https://bugs.webkit.org/show_bug.cgi?id=103274 exists.
m_frame.document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Blocked form submission to '" + submission->action().stringCenterEllipsizedToLength() + "' because the form's frame is sandboxed and the 'allow-forms' permission is not set.");
return;
}
URL formAction = submission->action();
if (!m_frame.document()->contentSecurityPolicy()->allowFormAction(formAction))
return;
auto* targetFrame = findFrameForNavigation(submission->target(), &submission->state().sourceDocument());
if (!targetFrame) {
if (!LocalDOMWindow::allowPopUp(m_frame) && !UserGestureIndicator::processingUserGesture())
return;
// FIXME: targetFrame can be null for two distinct reasons:
// 1. The frame was not found by name, so we should try opening a new window.
// 2. The frame was found, but navigating it was not allowed, e.g. by HTML5 sandbox or by origin checks.
// Continuing form submission makes no sense in the latter case.
// There is a repeat check after timer fires, so this is not a correctness issue.
targetFrame = &m_frame;
} else
submission->clearTarget();
if (!targetFrame->page())
return;
if (m_frame.tree().isDescendantOf(targetFrame))
m_submittedFormURL = submission->requestURL();
submission->setReferrer(outgoingReferrer());
submission->setOrigin(SecurityPolicy::generateOriginHeader(m_frame.document()->referrerPolicy(), submission->requestURL(), m_frame.document()->securityOrigin(), OriginAccessPatternsForWebProcess::singleton()));
targetFrame->navigationScheduler().scheduleFormSubmission(WTFMove(submission));
}
void FrameLoader::stopLoading(UnloadEventPolicy unloadEventPolicy)
{
if (m_frame.document() && m_frame.document()->parser())
m_frame.document()->parser()->stopParsing();
if (unloadEventPolicy != UnloadEventPolicy::None)
dispatchUnloadEvents(unloadEventPolicy);
m_isComplete = true; // to avoid calling completed() in finishedParsing()
m_didCallImplicitClose = true; // don't want that one either
if (m_frame.document() && m_frame.document()->parsing()) {
finishedParsing();
m_frame.document()->setParsing(false);
}
if (auto* document = m_frame.document()) {
// FIXME: Should the DatabaseManager watch for something like ActiveDOMObject::stop() rather than being special-cased here?
DatabaseManager::singleton().stopDatabases(*document, nullptr);
}
policyChecker().stopCheck();
// FIXME: This will cancel redirection timer, which really needs to be restarted when restoring the frame from b/f cache.
m_frame.navigationScheduler().cancel();
}
void FrameLoader::stop()
{
// http://bugs.webkit.org/show_bug.cgi?id=10854
// The frame's last ref may be removed and it will be deleted by checkCompleted().
Ref protectedFrame { m_frame };
if (DocumentParser* parser = m_frame.document()->parser()) {
parser->stopParsing();
parser->finish();
}
}
void FrameLoader::closeURL()
{
history().saveDocumentState();
RefPtr<Document> currentDocument = m_frame.document();
UnloadEventPolicy unloadEventPolicy;
if (m_frame.page() && m_frame.page()->chrome().client().isSVGImageChromeClient()) {
// If this is the SVGDocument of an SVGImage, no need to dispatch events or recalcStyle.
unloadEventPolicy = UnloadEventPolicy::None;
} else {
// Should only send the pagehide event here if the current document exists and has not been placed in the back/forward cache.
unloadEventPolicy = currentDocument && currentDocument->backForwardCacheState() == Document::NotInBackForwardCache ? UnloadEventPolicy::UnloadAndPageHide : UnloadEventPolicy::UnloadOnly;
}
stopLoading(unloadEventPolicy);
if (currentDocument)
currentDocument->editor().clearUndoRedoOperations();
}
bool FrameLoader::didOpenURL()
{
if (m_frame.navigationScheduler().redirectScheduledDuringLoad()) {
// A redirect was scheduled before the document was created.
// This can happen when one frame changes another frame's location.
return false;
}
m_frame.navigationScheduler().cancel();
m_isComplete = false;
m_didCallImplicitClose = false;
// If we are still in the process of initializing an empty document then
// its frame is not in a consistent state for rendering, so avoid setJSStatusBarText
// since it may cause clients to attempt to render the frame.
if (!m_stateMachine.creatingInitialEmptyDocument()) {
auto* window = m_frame.document()->domWindow();
window->setStatus(String());
window->setDefaultStatus(String());
}
started();
return true;
}
void FrameLoader::didExplicitOpen()
{
m_isComplete = false;
m_didCallImplicitClose = false;
// Calling document.open counts as committing the first real document load.
if (!m_stateMachine.committedFirstRealDocumentLoad())
m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit);
if (auto* document = m_frame.document())
m_client->dispatchDidExplicitOpen(document->url(), document->contentType());
// Prevent window.open(url) -- eg window.open("about:blank") -- from blowing away results
// from a subsequent window.document.open / window.document.write call.
// Canceling redirection here works for all cases because document.open
// implicitly precedes document.write.
m_frame.navigationScheduler().cancel();
}
static inline bool shouldClearWindowName(const LocalFrame& frame, const Document& newDocument)
{
if (!frame.isMainFrame())
return false;
if (frame.loader().opener())
return false;
return !newDocument.securityOrigin().isSameOriginAs(frame.document()->securityOrigin());
}
void FrameLoader::clear(RefPtr<Document>&& newDocument, bool clearWindowProperties, bool clearScriptObjects, bool clearFrameView, Function<void()>&& handleDOMWindowCreation)
{
bool neededClear = m_needsClear;
m_needsClear = false;
if (neededClear && m_frame.document()->backForwardCacheState() != Document::InBackForwardCache) {
Ref document { *m_frame.document() };
document->cancelParsing();
document->stopActiveDOMObjects();
bool hadLivingRenderTree = document->hasLivingRenderTree();
document->willBeRemovedFromFrame();
if (hadLivingRenderTree)
document->adjustFocusedNodeOnNodeRemoval(document);
}
if (handleDOMWindowCreation)
handleDOMWindowCreation();
if (!neededClear)
return;
// Do this after detaching the document so that the unload event works.
if (clearWindowProperties) {
InspectorInstrumentation::frameWindowDiscarded(m_frame, m_frame.document()->domWindow());
m_frame.document()->domWindow()->resetUnlessSuspendedForDocumentSuspension();
m_frame.windowProxy().clearJSWindowProxiesNotMatchingDOMWindow(newDocument->domWindow(), m_frame.document()->backForwardCacheState() == Document::AboutToEnterBackForwardCache);
if (shouldClearWindowName(m_frame, *newDocument))
m_frame.tree().setName(nullAtom());
}
m_frame.eventHandler().clear();
if (clearFrameView && m_frame.view())
m_frame.view()->clear();
// Do not drop the document before the ScriptController and view are cleared
// as some destructors might still try to access the document.
m_frame.setDocument(nullptr);
subframeLoader().clear();
if (clearWindowProperties)
m_frame.windowProxy().setDOMWindow(newDocument->domWindow());
if (clearScriptObjects)
m_frame.script().clearScriptObjects();
if (newDocument->contentSecurityPolicy()) {
bool enableEvalValue = newDocument->contentSecurityPolicy()->evalErrorMessage().isNull();
bool enableWASMValue = newDocument->contentSecurityPolicy()->webAssemblyErrorMessage().isNull();
m_frame.script().setEvalEnabled(enableEvalValue, newDocument->contentSecurityPolicy()->evalErrorMessage());
m_frame.script().setWebAssemblyEnabled(enableWASMValue, newDocument->contentSecurityPolicy()->webAssemblyErrorMessage());
}
m_frame.navigationScheduler().clear();
m_checkTimer.stop();
m_shouldCallCheckCompleted = false;
m_shouldCallCheckLoadComplete = false;
if (m_stateMachine.isDisplayingInitialEmptyDocument() && m_stateMachine.committedFirstRealDocumentLoad())
m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
}
void FrameLoader::receivedFirstData()
{
Ref protectedFrame { m_frame };
dispatchDidCommitLoad(std::nullopt, std::nullopt, std::nullopt);
dispatchDidClearWindowObjectsInAllWorlds();
dispatchGlobalObjectAvailableInAllWorlds();
if (!m_documentLoader)
return;
auto& documentLoader = *m_documentLoader;
auto& title = documentLoader.title();
if (!title.string.isNull())
m_client->dispatchDidReceiveTitle(title);
ASSERT(m_frame.document());
auto& document = *m_frame.document();
LinkLoader::loadLinksFromHeader(documentLoader.response().httpHeaderField(HTTPHeaderName::Link), document.url(), document, LinkLoader::MediaAttributeCheck::MediaAttributeEmpty);
scheduleRefreshIfNeeded(document, documentLoader.response().httpHeaderField(HTTPHeaderName::Refresh), IsMetaRefresh::No);
}
void FrameLoader::setOutgoingReferrer(const URL& url)
{
m_outgoingReferrer = url.strippedForUseAsReferrer();
}
static AtomString extractContentLanguageFromHeader(const String& header)
{
auto commaIndex = header.find(',');
if (commaIndex == notFound)
return AtomString { stripLeadingAndTrailingHTMLSpaces(header) };
return StringView(header).left(commaIndex).stripLeadingAndTrailingMatchedCharacters(isASCIIWhitespace<UChar>).toAtomString();
}
void FrameLoader::didBeginDocument(bool dispatch)
{
m_needsClear = true;
m_isComplete = false;
m_didCallImplicitClose = false;
m_frame.document()->setReadyState(Document::Loading);
if (dispatch)
dispatchDidClearWindowObjectsInAllWorlds();
updateFirstPartyForCookies();
m_frame.document()->initContentSecurityPolicy();
const Settings& settings = m_frame.settings();
m_frame.document()->cachedResourceLoader().setImagesEnabled(settings.areImagesEnabled());
m_frame.document()->cachedResourceLoader().setAutoLoadImages(settings.loadsImagesAutomatically());
if (m_documentLoader) {
String dnsPrefetchControl = m_documentLoader->response().httpHeaderField(HTTPHeaderName::XDNSPrefetchControl);
if (!dnsPrefetchControl.isEmpty())
m_frame.document()->parseDNSPrefetchControlHeader(dnsPrefetchControl);
// The DocumentLoader may have already parsed the CSP header to do some checks. If so, reuse the already parsed version instead of parsing again.
if (auto* contentSecurityPolicy = m_documentLoader->contentSecurityPolicy())
m_frame.document()->contentSecurityPolicy()->didReceiveHeaders(*contentSecurityPolicy, ContentSecurityPolicy::ReportParsingErrors::No);
else
m_frame.document()->contentSecurityPolicy()->didReceiveHeaders(ContentSecurityPolicyResponseHeaders(m_documentLoader->response()), referrer(), ContentSecurityPolicy::ReportParsingErrors::No);
if (m_frame.document()->url().protocolIsBlob())
m_frame.document()->contentSecurityPolicy()->updateSourceSelf(SecurityOrigin::create(m_frame.document()->url()));
if (m_frame.document()->url().protocolIsInHTTPFamily() || m_frame.document()->url().protocolIsBlob())
m_frame.document()->setCrossOriginEmbedderPolicy(obtainCrossOriginEmbedderPolicy(m_documentLoader->response(), m_frame.document()));
String referrerPolicy = m_documentLoader->response().httpHeaderField(HTTPHeaderName::ReferrerPolicy);
if (!referrerPolicy.isNull())
m_frame.document()->processReferrerPolicy(referrerPolicy, ReferrerPolicySource::HTTPHeader);
String headerContentLanguage = m_documentLoader->response().httpHeaderField(HTTPHeaderName::ContentLanguage);
if (!headerContentLanguage.isEmpty()) {
auto contentLanguage = extractContentLanguageFromHeader(headerContentLanguage);
if (!contentLanguage.isEmpty())
m_frame.document()->setContentLanguage(WTFMove(contentLanguage));
}
String reportingEndpoints = m_documentLoader->response().httpHeaderField(HTTPHeaderName::ReportingEndpoints);
if (!reportingEndpoints.isEmpty())
m_frame.document()->reportingScope().parseReportingEndpoints(reportingEndpoints, m_documentLoader->response().url());
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#initialise-the-document-object (Step 7)
if (m_frame.isMainFrame()) {
if (auto crossOriginOpenerPolicy = m_documentLoader->crossOriginOpenerPolicy())
m_frame.document()->setCrossOriginOpenerPolicy(WTFMove(*crossOriginOpenerPolicy));
}
}
history().restoreDocumentState();
}
void FrameLoader::finishedParsing()
{
LOG(Loading, "WebCoreLoading frame %" PRIu64 ": Finished parsing", m_frame.frameID().object().toUInt64());
m_frame.injectUserScripts(UserScriptInjectionTime::DocumentEnd);
if (m_stateMachine.creatingInitialEmptyDocument())
return;
// This can be called from the Frame's destructor, in which case we shouldn't protect ourselves
// because doing so will cause us to re-enter the destructor when protector goes out of scope.
// Null-checking the FrameView indicates whether or not we're in the destructor.
RefPtr protectedFrame { m_frame.view() ? &m_frame : nullptr };
m_client->dispatchDidFinishDocumentLoad();
scrollToFragmentWithParentBoundary(m_frame.document()->url());
checkCompleted();
if (!m_frame.view())
return; // We are being destroyed by something checkCompleted called.
// Check if the scrollbars are really needed for the content.
// If not, remove them, relayout, and repaint.
m_frame.view()->restoreScrollbar();
}
void FrameLoader::loadDone(LoadCompletionType type)
{
if (type == LoadCompletionType::Finish)
checkCompleted();
else
scheduleCheckCompleted();
}
void FrameLoader::subresourceLoadDone(LoadCompletionType type)
{
if (type == LoadCompletionType::Finish)
checkLoadComplete();
else
scheduleCheckLoadComplete();
}
bool FrameLoader::allChildrenAreComplete() const
{
for (auto* child = m_frame.tree().firstChild(); child; child = child->tree().nextSibling()) {
if (child->preventsParentFromBeingComplete())
return false;
}
return true;
}
bool FrameLoader::allAncestorsAreComplete() const
{
for (Frame* ancestor = &m_frame; ancestor; ancestor = ancestor->tree().parent()) {
auto* localAncestor = dynamicDowncast<LocalFrame>(ancestor);
if (!localAncestor)
continue;
if (!localAncestor->loader().m_isComplete)
return false;
}
return true;
}
void FrameLoader::checkCompleted()
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed());
m_shouldCallCheckCompleted = false;
// Have we completed before?
if (m_isComplete)
return;
// FIXME: It would be better if resource loads were kicked off after render tree update (or didn't complete synchronously).
// https://bugs.webkit.org/show_bug.cgi?id=171729
if (m_frame.document()->inRenderTreeUpdate()) {
scheduleCheckCompleted();
return;
}
// Are we still parsing?
if (m_frame.document()->parsing())
return;
// Still waiting for images/scripts?
if (m_frame.document()->cachedResourceLoader().requestCount())
return;
// Still waiting for elements that don't go through a FrameLoader?
if (m_frame.document()->isDelayingLoadEvent())
return;
auto* scriptableParser = m_frame.document()->scriptableDocumentParser();
if (scriptableParser && scriptableParser->hasScriptsWaitingForStylesheets())
return;
// Any frame that hasn't completed yet?
if (!allChildrenAreComplete())
return;
// Important not to protect earlier in this function, because earlier parts
// of this function can be called in the frame's destructor, and it's not legal
// to ref an object while it's being destroyed.
Ref protectedFrame { m_frame };
// OK, completed.
m_isComplete = true;
m_requestedHistoryItem = nullptr;
m_frame.document()->setReadyState(Document::Complete);
checkCallImplicitClose(); // if we didn't do it before
m_frame.navigationScheduler().startTimer();
completed();
if (m_frame.page())
checkLoadComplete();
}
void FrameLoader::checkTimerFired()
{
checkCompletenessNow();
}
void FrameLoader::checkCompletenessNow()
{
Ref protectedFrame { m_frame };
if (Page* page = m_frame.page()) {
if (page->defersLoading())
return;
}
if (m_shouldCallCheckCompleted)
checkCompleted();
if (m_shouldCallCheckLoadComplete)
checkLoadComplete();
}
void FrameLoader::startCheckCompleteTimer()
{
if (!(m_shouldCallCheckCompleted || m_shouldCallCheckLoadComplete))
return;
if (m_checkTimer.isActive())
return;
m_checkTimer.startOneShot(0_s);
}
void FrameLoader::scheduleCheckCompleted()
{
m_shouldCallCheckCompleted = true;
startCheckCompleteTimer();
}
void FrameLoader::scheduleCheckLoadComplete()
{
m_shouldCallCheckLoadComplete = true;
startCheckCompleteTimer();
}
void FrameLoader::checkCallImplicitClose()
{
if (m_didCallImplicitClose || m_frame.document()->parsing() || m_frame.document()->isDelayingLoadEvent())
return;
if (!allChildrenAreComplete())
return; // still got a frame running -> too early
m_didCallImplicitClose = true;
m_wasUnloadEventEmitted = false;
m_frame.document()->implicitClose();
}