/* * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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 * Copyright (C) Research In Motion Limited 2009. All rights reserved. * Copyright (C) 2011 Kris Jordan * 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 "BackForwardController.h" #include "BeforeUnloadEvent.h" #include "CachedPage.h" #include "CachedResourceLoader.h" #include "Chrome.h" #include "ChromeClient.h" #include "ContentSecurityPolicy.h" #include "DOMImplementation.h" #include "DOMWindow.h" #include "DatabaseManager.h" #include "DiagnosticLoggingClient.h" #include "DiagnosticLoggingKeys.h" #include "Document.h" #include "DocumentLoadTiming.h" #include "DocumentLoader.h" #include "Editor.h" #include "EditorClient.h" #include "Element.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 "FrameView.h" #include "GCController.h" #include "HTMLAnchorElement.h" #include "HTMLFormElement.h" #include "HTMLInputElement.h" #include "HTMLNames.h" #include "HTMLObjectElement.h" #include "HTMLParserIdioms.h" #include "HTTPHeaderNames.h" #include "HTTPParsers.h" #include "HistoryController.h" #include "HistoryItem.h" #include "IconController.h" #include "IgnoreOpensDuringUnloadCountIncrementer.h" #include "InspectorController.h" #include "InspectorInstrumentation.h" #include "LoaderStrategy.h" #include "Logging.h" #include "MIMETypeRegistry.h" #include "MainFrame.h" #include "MemoryCache.h" #include "PageCache.h" #include "PageThrottler.h" #include "PageTransitionEvent.h" #include "PlatformStrategies.h" #include "PluginData.h" #include "PluginDocument.h" #include "PolicyChecker.h" #include "ProgressTracker.h" #include "ResourceHandle.h" #include "ResourceLoadInfo.h" #include "ResourceRequest.h" #include "SVGDocument.h" #include "SVGLocatable.h" #include "SVGNames.h" #include "SVGPreserveAspectRatio.h" #include "SVGViewElement.h" #include "SVGViewSpec.h" #include "SchemeRegistry.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 "SubframeLoader.h" #include "TextResourceDecoder.h" #include "UserContentController.h" #include "WindowFeatures.h" #include "XMLDocumentParser.h" #include #include #include #include #include #if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML) #include "Archive.h" #endif #if ENABLE(DATA_DETECTION) #include "DataDetection.h" #endif #if PLATFORM(IOS) #include "DocumentType.h" #include "MemoryPressureHandler.h" #include "ResourceLoader.h" #include "RuntimeApplicationChecksIOS.h" #include "SystemMemory.h" #include "WKContentObservation.h" #endif namespace WebCore { using namespace HTMLNames; using namespace SVGNames; static const char defaultAcceptHeader[] = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"; #if PLATFORM(IOS) const int memoryLevelThresholdToPrunePageCache = 20; #endif bool isBackForwardLoadType(FrameLoadType type) { switch (type) { case FrameLoadType::Standard: case FrameLoadType::Reload: case FrameLoadType::ReloadFromOrigin: 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; } // 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(Frame& frame, SandboxFlags mask) { return frame.document() && frame.document()->isSandboxed(mask); } struct ForbidPromptsScope { ForbidPromptsScope(Page* page) : m_page(page) { if (!m_page) return; m_page->forbidPrompts(); } ~ForbidPromptsScope() { if (!m_page) return; m_page->allowPrompts(); } Page* m_page; }; class FrameLoader::FrameProgressTracker { public: explicit FrameProgressTracker(Frame& 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); } private: Frame& m_frame; bool m_inProgress; }; FrameLoader::FrameLoader(Frame& frame, FrameLoaderClient& client) : m_frame(frame) , m_client(client) , m_policyChecker(std::make_unique(frame)) , m_history(std::make_unique(frame)) , m_notifier(frame) , m_subframeLoader(std::make_unique(frame)) , m_icon(std::make_unique(frame)) , m_mixedContentChecker(frame) , m_state(FrameStateProvisional) , 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); for (auto& frame : m_openedFrames) frame->loader().m_opener = nullptr; m_client.frameLoaderDestroyed(); if (m_networkingContext) m_networkingContext->invalidate(); } void FrameLoader::init() { // This somewhat odd set of steps gives the frame an initial empty document. setPolicyDocumentLoader(m_client.createDocumentLoader(ResourceRequest(URL(ParsedURLString, emptyString())), SubstituteData()).ptr()); setProvisionalDocumentLoader(m_policyDocumentLoader.get()); m_provisionalDocumentLoader->startLoadingMainResource(); Ref protect(m_frame); m_frame.document()->cancelParsing(); m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocument); m_networkingContext = m_client.createNetworkingContext(); m_progressTracker = std::make_unique(m_frame); } #if PLATFORM(IOS) 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(). RefPtr loader = m_client.createDocumentLoader(ResourceRequest(URL(ParsedURLString, emptyString())), SubstituteData()); loader->attachToFrame(m_frame); loader->setResponse(ResourceResponse(URL(), ASCIILiteral("text/html"), 0, String())); loader->setCommitted(true); setDocumentLoader(loader.get()); 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 = FrameStateComplete; m_needsClear = true; m_networkingContext = m_client.createNetworkingContext(); m_progressTracker = std::make_unique(m_frame); } #endif 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::changeLocation(const FrameLoadRequest& request) { urlSelected(request, nullptr); } void FrameLoader::urlSelected(const URL& url, const String& passedTarget, Event* triggeringEvent, LockHistory lockHistory, LockBackForwardList lockBackForwardList, ShouldSendReferrer shouldSendReferrer, ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy) { NewFrameOpenerPolicy newFrameOpenerPolicy = shouldSendReferrer == NeverSendReferrer ? NewFrameOpenerPolicy::Suppress : NewFrameOpenerPolicy::Allow; urlSelected(FrameLoadRequest(m_frame.document()->securityOrigin(), ResourceRequest(url), passedTarget, lockHistory, lockBackForwardList, shouldSendReferrer, AllowNavigationToInvalidURL::Yes, newFrameOpenerPolicy, DoNotReplaceDocumentIfJavaScriptURL, shouldOpenExternalURLsPolicy), triggeringEvent); } void FrameLoader::urlSelected(const FrameLoadRequest& passedRequest, Event* triggeringEvent) { Ref protect(m_frame); FrameLoadRequest frameRequest(passedRequest); if (m_frame.script().executeIfJavaScriptURL(frameRequest.resourceRequest().url(), frameRequest.shouldReplaceDocumentIfJavaScriptURL())) return; if (frameRequest.frameName().isEmpty()) frameRequest.setFrameName(m_frame.document()->baseTarget()); addHTTPOriginIfNeeded(frameRequest.resourceRequest(), outgoingOrigin()); loadFrameRequest(frameRequest, triggeringEvent, nullptr); } void FrameLoader::submitForm(PassRefPtr submission) { ASSERT(submission->method() == FormSubmission::PostMethod || submission->method() == FormSubmission::GetMethod); // FIXME: Find a good spot for these. ASSERT(submission->data()); ASSERT(submission->state()); 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; } if (protocolIsJavaScript(submission->action())) { if (!m_frame.document()->contentSecurityPolicy()->allowFormAction(URL(submission->action()))) return; m_isExecutingJavaScriptFormAction = true; Ref protect(m_frame); m_frame.script().executeIfJavaScriptURL(submission->action(), DoNotReplaceDocumentIfJavaScriptURL); m_isExecutingJavaScriptFormAction = false; return; } Frame* targetFrame = findFrameForNavigation(submission->target(), submission->state()->sourceDocument()); if (!targetFrame) { if (!DOMWindow::allowPopUp(&m_frame) && !ScriptController::processingUserGesture()) return; // FIXME: targetFrame can be 0 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; // FIXME: We'd like to remove this altogether and fix the multiple form submission issue another way. // We do not want to submit more than one form from the same page, nor do we want to submit a single // form more than once. This flag prevents these from happening; not sure how other browsers prevent this. // The flag is reset in each time we start dispatching a new mouse or key down event, and // also in setView since this part may get reused for a page from the back/forward cache. // The form multi-submit logic here is only needed when we are submitting a form that affects this frame. // FIXME: Frame targeting is only one of the ways the submission could end up doing something other // than replacing this frame's content, so this check is flawed. On the other hand, the check is hardly // needed any more now that we reset m_submittedFormURL on each mouse or key down event. if (m_frame.tree().isDescendantOf(targetFrame)) { if (m_submittedFormURL == submission->requestURL()) return; m_submittedFormURL = submission->requestURL(); } submission->data()->generateFiles(m_frame.document()); submission->setReferrer(outgoingReferrer()); submission->setOrigin(outgoingOrigin()); targetFrame->navigationScheduler().scheduleFormSubmission(submission); } void FrameLoader::stopLoading(UnloadEventPolicy unloadEventPolicy) { if (m_frame.document() && m_frame.document()->parser()) m_frame.document()->parser()->stopParsing(); if (unloadEventPolicy != UnloadEventPolicyNone) 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 (Document* doc = m_frame.document()) { // FIXME: HTML5 doesn't tell us to set the state to complete when aborting, but we do anyway to match legacy behavior. // http://www.w3.org/Bugs/Public/show_bug.cgi?id=10537 doc->setReadyState(Document::Complete); // FIXME: Should the DatabaseManager watch for something like ActiveDOMObject::stop() rather than being special-cased here? DatabaseManager::singleton().stopDatabases(doc, 0); } // 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 protect(m_frame); if (DocumentParser* parser = m_frame.document()->parser()) { parser->stopParsing(); parser->finish(); } icon().stopLoader(); } void FrameLoader::willTransitionToCommitted() { // This function is called when a frame is still fully in place (not cached, not detached), but will be replaced. if (m_frame.editor().hasComposition()) { // The text was already present in DOM, so it's better to confirm than to cancel the composition. m_frame.editor().confirmComposition(); if (EditorClient* editorClient = m_frame.editor().client()) { editorClient->respondToChangedSelection(&m_frame); editorClient->discardedComposition(&m_frame); } } } bool FrameLoader::closeURL() { history().saveDocumentState(); 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 = UnloadEventPolicyNone; } else { // Should only send the pagehide event here if the current document exists and has not been placed in the page cache. unloadEventPolicy = currentDocument && !currentDocument->inPageCache() ? UnloadEventPolicyUnloadAndPageHide : UnloadEventPolicyUnloadOnly; } stopLoading(unloadEventPolicy); m_frame.editor().clearUndoRedoOperations(); return true; } 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_frame.editor().clearLastEditCommand(); 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()) { DOMWindow* 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); // 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(); } void FrameLoader::cancelAndClear() { m_frame.navigationScheduler().cancel(); if (!m_isComplete) closeURL(); clear(m_frame.document(), false); m_frame.script().updatePlatformScriptObjects(); } void FrameLoader::clear(Document* newDocument, bool clearWindowProperties, bool clearScriptObjects, bool clearFrameView) { m_frame.editor().clear(); if (!m_needsClear) return; m_needsClear = false; if (!m_frame.document()->inPageCache()) { m_frame.document()->cancelParsing(); m_frame.document()->stopActiveDOMObjects(); bool hadLivingRenderTree = m_frame.document()->hasLivingRenderTree(); m_frame.document()->prepareForDestruction(); if (hadLivingRenderTree) m_frame.document()->removeFocusedNodeOfSubtree(m_frame.document()); } // 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.script().clearWindowShell(newDocument->domWindow(), m_frame.document()->inPageCache()); } m_frame.selection().prepareForDestruction(); // We may call this code during object destruction, so need to make sure eventHandler is present. if (auto eventHandler = m_frame.eventHandlerPtr()) 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 (clearScriptObjects) m_frame.script().clearScriptObjects(); m_frame.script().enableEval(); 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() { dispatchDidCommitLoad(); dispatchDidClearWindowObjectsInAllWorlds(); dispatchGlobalObjectAvailableInAllWorlds(); if (m_documentLoader) { StringWithDirection ptitle = m_documentLoader->title(); // If we have a title let the WebView know about it. if (!ptitle.isNull()) m_client.dispatchDidReceiveTitle(ptitle); } if (!m_documentLoader) return; double delay; String urlString; if (!parseHTTPRefresh(m_documentLoader->response().httpHeaderField(HTTPHeaderName::Refresh), false, delay, urlString)) return; URL completedURL; if (urlString.isEmpty()) completedURL = m_frame.document()->url(); else completedURL = m_frame.document()->completeURL(urlString); if (!protocolIsJavaScript(completedURL)) m_frame.navigationScheduler().scheduleRedirect(m_frame.document(), delay, completedURL); else { String message = "Refused to refresh " + m_frame.document()->url().stringCenterEllipsizedToLength() + " to a javascript: URL"; m_frame.document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, message); } } void FrameLoader::setOutgoingReferrer(const URL& url) { m_outgoingReferrer = url.strippedForUseAsReferrer(); } void FrameLoader::didBeginDocument(bool dispatch) { m_needsClear = true; m_isComplete = false; m_didCallImplicitClose = false; m_frame.document()->setReadyState(Document::Loading); if (m_pendingStateObject) { m_frame.document()->statePopped(m_pendingStateObject.get()); m_pendingStateObject = nullptr; } 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); m_frame.document()->contentSecurityPolicy()->didReceiveHeaders(ContentSecurityPolicyResponseHeaders(m_documentLoader->response())); String headerContentLanguage = m_documentLoader->response().httpHeaderField(HTTPHeaderName::ContentLanguage); if (!headerContentLanguage.isEmpty()) { size_t commaIndex = headerContentLanguage.find(','); headerContentLanguage.truncate(commaIndex); // notFound == -1 == don't truncate headerContentLanguage = headerContentLanguage.stripWhiteSpace(isHTMLSpace); if (!headerContentLanguage.isEmpty()) m_frame.document()->setContentLanguage(headerContentLanguage); } } history().restoreDocumentState(); } void FrameLoader::finishedParsing() { m_frame.injectUserScripts(InjectAtDocumentEnd); 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 protector = m_frame.view() ? &m_frame : 0; 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() { checkCompleted(); } bool FrameLoader::allChildrenAreComplete() const { for (Frame* child = m_frame.tree().firstChild(); child; child = child->tree().nextSibling()) { if (!child->loader().m_isComplete) return false; } return true; } bool FrameLoader::allAncestorsAreComplete() const { for (Frame* ancestor = &m_frame; ancestor; ancestor = ancestor->tree().parent()) { if (!ancestor->loader().m_isComplete) return false; } return true; } void FrameLoader::checkCompleted() { m_shouldCallCheckCompleted = false; // Have we completed before? if (m_isComplete) 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; // 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 protect(m_frame); // OK, completed. m_isComplete = true; m_requestedHistoryItem = nullptr; m_frame.document()->setReadyState(Document::Complete); #if PLATFORM(IOS) if (m_frame.document()->url().isEmpty()) { // We need to update the document URL of a PDF document to be non-empty so that both back/forward history navigation // between PDF pages and fragment navigation works. See for more details. // FIXME: Is there a better place for this code, say DocumentLoader? Also, we should explicitly only update the URL // of the document when it's a PDFDocument object instead of assuming that a Document object with an empty URL is a PDFDocument. // FIXME: This code is incorrect for a synthesized document (which also has an empty URL). The URL for a synthesized // document should be the URL specified to FrameLoader::initForSynthesizedDocument(). m_frame.document()->setURL(activeDocumentLoader()->documentURL()); } #endif checkCallImplicitClose(); // if we didn't do it before m_frame.navigationScheduler().startTimer(); completed(); if (m_frame.page()) checkLoadComplete(); } void FrameLoader::checkTimerFired() { Ref protect(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); } 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(); } void FrameLoader::loadURLIntoChildFrame(const URL& url, const String& referer, Frame* childFrame) { ASSERT(childFrame); #if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML) RefPtr subframeArchive = activeDocumentLoader()->popArchiveForSubframe(childFrame->tree().uniqueName(), url); if (subframeArchive) { childFrame->loader().loadArchive(subframeArchive.release()); return; } #endif // ENABLE(WEB_ARCHIVE) HistoryItem* parentItem = history().currentItem(); // If we're moving in the back/forward list, we might want to replace the content // of this child frame with whatever was there at that point. if (parentItem && parentItem->children().size() && isBackForwardLoadType(loadType()) && !m_frame.document()->loadEventFinished()) { HistoryItem* childItem = parentItem->childItemWithTarget(childFrame->tree().uniqueName()); if (childItem) { childFrame->loader().m_requestedHistoryItem = childItem; childFrame->loader().loadDifferentDocumentItem(*childItem, loadType(), MayAttemptCacheOnlyLoadForFormSubmissionItem); return; } } FrameLoadRequest frameLoadRequest(m_frame.document()->securityOrigin(), ResourceRequest(url), "_self", LockHistory::No, LockBackForwardList::Yes, ShouldSendReferrer::MaybeSendReferrer, AllowNavigationToInvalidURL::Yes, NewFrameOpenerPolicy::Suppress, ReplaceDocumentIfJavaScriptURL, ShouldOpenExternalURLsPolicy::ShouldNotAllow); childFrame->loader().loadURL(frameLoadRequest, referer, FrameLoadType::RedirectWithLockedBackForwardList, 0, 0); } #if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML) void FrameLoader::loadArchive(PassRefPtr archive) { ArchiveResource* mainResource = archive->mainResource(); ASSERT(mainResource); if (!mainResource) return; ResourceResponse response(URL(), mainResource->mimeType(), mainResource->data()->size(), mainResource->textEncoding()); SubstituteData substituteData(mainResource->data(), URL(), response, SubstituteData::SessionHistoryVisibility::Hidden); ResourceRequest request(mainResource->url()); #if PLATFORM(MAC) request.applyWebArchiveHackForMail(); #endif RefPtr documentLoader = m_client.createDocumentLoader(request, substituteData); documentLoader->setArchive(archive.get()); load(documentLoader.get()); } #endif // ENABLE(WEB_ARCHIVE) || ENABLE(MHTML) String FrameLoader::outgoingReferrer() const { // See http://www.whatwg.org/specs/web-apps/current-work/#fetching-resources // for why we walk the parent chain for srcdoc documents. Frame* frame = &m_frame; while (frame->document()->isSrcdocDocument()) { frame = frame->tree().parent(); // Srcdoc documents cannot be top-level documents, by definition, // because they need to be contained in iframes with the srcdoc. ASSERT(frame); } return frame->loader().m_outgoingReferrer; } String FrameLoader::outgoingOrigin() const { return m_frame.document()->securityOrigin()->toString(); } bool FrameLoader::checkIfFormActionAllowedByCSP(const URL& url) const { if (m_submittedFormURL.isEmpty()) return true; return m_frame.document()->contentSecurityPolicy()->allowFormAction(url); } Frame* FrameLoader::opener() { return m_opener; } void FrameLoader::setOpener(Frame* opener) { if (m_opener && !opener) m_client.didDisownOpener(); if (m_opener) m_opener->loader().m_openedFrames.remove(&m_frame); if (opener) opener->loader().m_openedFrames.add(&m_frame); m_opener = opener; if (m_frame.document()) m_frame.document()->initSecurityContext(); } // FIXME: This does not belong in FrameLoader! void FrameLoader::handleFallbackContent() { HTMLFrameOwnerElement* owner = m_frame.ownerElement(); if (!is(owner)) return; downcast(*owner).renderFallbackContent(); } void FrameLoader::provisionalLoadStarted() { if (m_stateMachine.firstLayoutDone()) m_stateMachine.advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad); m_frame.navigationScheduler().cancel(true); m_client.provisionalLoadStarted(); } void FrameLoader::resetMultipleFormSubmissionProtection() { m_submittedFormURL = URL(); } void FrameLoader::updateFirstPartyForCookies() { if (m_frame.tree().parent()) setFirstPartyForCookies(m_frame.tree().parent()->document()->firstPartyForCookies()); else setFirstPartyForCookies(m_frame.document()->url()); } void FrameLoader::setFirstPartyForCookies(const URL& url) { for (Frame* frame = &m_frame; frame; frame = frame->tree().traverseNext(&m_frame)) frame->document()->setFirstPartyForCookies(url); } // This does the same kind of work that didOpenURL does, except it relies on the fact // that a higher level already checked that the URLs match and the scrolling is the right thing to do. void FrameLoader::loadInSameDocument(const URL& url, PassRefPtr stateObject, bool isNewNavigation) { // If we have a state object, we cannot also be a new navigation. ASSERT(!stateObject || (stateObject && !isNewNavigation)); // Update the data source's request with the new URL to fake the URL change URL oldURL = m_frame.document()->url(); m_frame.document()->setURL(url); setOutgoingReferrer(url); documentLoader()->replaceRequestURLForSameDocumentNavigation(url); if (isNewNavigation && !shouldTreatURLAsSameAsCurrent(url) && !stateObject) { // NB: must happen after replaceRequestURLForSameDocumentNavigation(), since we add // based on the current request. Must also happen before we openURL and displace the // scroll position, since adding the BF item will save away scroll state. // NB2: If we were loading a long, slow doc, and the user fragment navigated before // it was done, currItem is now set the that slow doc, and prevItem is whatever was // before it. Adding the b/f item will bump the slow doc down to prevItem, even // though its load is not yet done. I think this all works out OK, for one because // we have already saved away the scroll and doc state for the long slow load, // but it's not an obvious case. history().updateBackForwardListForFragmentScroll(); } bool hashChange = equalIgnoringFragmentIdentifier(url, oldURL) && url.fragmentIdentifier() != oldURL.fragmentIdentifier(); history().updateForSameDocumentNavigation(); // If we were in the autoscroll/panScroll mode we want to stop it before following the link to the anchor if (hashChange) m_frame.eventHandler().stopAutoscrollTimer(); // It's important to model this as a load that starts and immediately finishes. // Otherwise, the parent frame may think we never finished loading. started(); // We need to scroll to the fragment whether or not a hash change occurred, since // the user might have scrolled since the previous navigation. scrollToFragmentWithParentBoundary(url); m_isComplete = false; checkCompleted(); if (isNewNavigation) { // This will clear previousItem from the rest of the frame tree that didn't // doing any loading. We need to make a pass on this now, since for fragment // navigation we'll not go through a real load and reach Completed state. checkLoadComplete(); } m_client.dispatchDidNavigateWithinPage(); m_frame.document()->statePopped(stateObject ? stateObject : SerializedScriptValue::nullValue()); m_client.dispatchDidPopStateWithinPage(); if (hashChange) { m_frame.document()->enqueueHashchangeEvent(oldURL, url); m_client.dispatchDidChangeLocationWithinPage(); } // FrameLoaderClient::didFinishLoad() tells the internal load delegate the load finished with no error m_client.didFinishLoad(); } bool FrameLoader::isComplete() const { return m_isComplete; } void FrameLoader::completed() { Ref protect(m_frame); for (Frame* descendant = m_frame.tree().traverseNext(&m_frame); descendant; descendant = descendant->tree().traverseNext(&m_frame)) descendant->navigationScheduler().startTimer(); if (Frame* parent = m_frame.tree().parent()) parent->loader().checkCompleted(); if (m_frame.view()) m_frame.view()->maintainScrollPositionAtAnchor(nullptr); m_activityAssertion = nullptr; } void FrameLoader::started() { if (m_frame.page()) m_activityAssertion = m_frame.page()->pageThrottler().pageLoadActivityToken(); for (Frame* frame = &m_frame; frame; frame = frame->tree().parent()) frame->loader().m_isComplete = false; } void FrameLoader::prepareForLoadStart() { m_progressTracker->progressStarted(); m_client.dispatchDidStartProvisionalLoad(); if (AXObjectCache::accessibilityEnabled()) { if (AXObjectCache* cache = m_frame.document()->existingAXObjectCache()) { AXObjectCache::AXLoadingEvent loadingEvent = loadType() == FrameLoadType::Reload ? AXObjectCache::AXLoadingReloaded : AXObjectCache::AXLoadingStarted; cache->frameLoadingEventNotification(&m_frame, loadingEvent); } } } void FrameLoader::setupForReplace() { m_client.revertToProvisionalState(m_documentLoader.get()); setState(FrameStateProvisional); m_provisionalDocumentLoader = m_documentLoader; m_documentLoader = nullptr; detachChildren(); } void FrameLoader::loadFrameRequest(const FrameLoadRequest& request, Event* event, PassRefPtr formState) { // Protect frame from getting blown away inside dispatchBeforeLoadEvent in loadWithDocumentLoader. Ref protect(m_frame); URL url = request.resourceRequest().url(); ASSERT(m_frame.document()); if (!request.requester()->canDisplay(url)) { reportLocalLoadFailed(&m_frame, url.stringCenterEllipsizedToLength()); return; } String argsReferrer = request.resourceRequest().httpReferrer(); if (argsReferrer.isEmpty()) argsReferrer = outgoingReferrer(); String referrer = SecurityPolicy::generateReferrerHeader(m_frame.document()->referrerPolicy(), url, argsReferrer); if (request.shouldSendReferrer() == NeverSendReferrer) referrer = String(); FrameLoadType loadType; if (request.resourceRequest().cachePolicy() == ReloadIgnoringCacheData) loadType = FrameLoadType::Reload; else if (request.lockBackForwardList() == LockBackForwardList::Yes) loadType = FrameLoadType::RedirectWithLockedBackForwardList; else loadType = FrameLoadType::Standard; if (request.resourceRequest().httpMethod() == "POST") loadPostRequest(request, referrer, loadType, event, formState.get()); else loadURL(request, referrer, loadType, event, formState.get()); // FIXME: It's possible this targetFrame will not be the same frame that was targeted by the actual // load if frame names have changed. Frame* sourceFrame = formState ? formState->sourceDocument()->frame() : &m_frame; if (!sourceFrame) sourceFrame = &m_frame; Frame* targetFrame = sourceFrame->loader().findFrameForNavigation(request.frameName()); if (targetFrame && targetFrame != sourceFrame) { if (Page* page = targetFrame->page()) page->chrome().focus(); } } static ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicyToApply(Frame& sourceFrame, ShouldOpenExternalURLsPolicy propagatedPolicy) { if (!sourceFrame.isMainFrame()) return ShouldOpenExternalURLsPolicy::ShouldNotAllow; if (ScriptController::processingUserGesture()) return ShouldOpenExternalURLsPolicy::ShouldAllow; return propagatedPolicy; } void FrameLoader::loadURL(const FrameLoadRequest& frameLoadRequest, const String& referrer, FrameLoadType newLoadType, Event* event, PassRefPtr prpFormState) { if (m_inStopAllLoaders) return; Ref protect(m_frame); String frameName = frameLoadRequest.frameName(); AllowNavigationToInvalidURL allowNavigationToInvalidURL = frameLoadRequest.allowNavigationToInvalidURL(); NewFrameOpenerPolicy openerPolicy = frameLoadRequest.newFrameOpenerPolicy(); LockHistory lockHistory = frameLoadRequest.lockHistory(); RefPtr formState = prpFormState; bool isFormSubmission = formState; const URL& newURL = frameLoadRequest.resourceRequest().url(); ResourceRequest request(newURL); if (!referrer.isEmpty()) { request.setHTTPReferrer(referrer); RefPtr referrerOrigin = SecurityOrigin::createFromString(referrer); addHTTPOriginIfNeeded(request, referrerOrigin->toString()); } #if ENABLE(CACHE_PARTITIONING) if (&m_frame.tree().top() != &m_frame) request.setDomainForCachePartition(m_frame.tree().top().document()->securityOrigin()->domainForCachePartition()); #endif addExtraFieldsToRequest(request, newLoadType, true); if (newLoadType == FrameLoadType::Reload || newLoadType == FrameLoadType::ReloadFromOrigin) request.setCachePolicy(ReloadIgnoringCacheData); ASSERT(newLoadType != FrameLoadType::Same); // The search for a target frame is done earlier in the case of form submission. Frame* targetFrame = isFormSubmission ? 0 : findFrameForNavigation(frameName); if (targetFrame && targetFrame != &m_frame) { FrameLoadRequest newFrameLoadRequest(frameLoadRequest); newFrameLoadRequest.setFrameName("_self"); targetFrame->loader().loadURL(newFrameLoadRequest, referrer, newLoadType, event, formState.release()); return; } if (m_pageDismissalEventBeingDispatched != PageDismissalType::None) return; NavigationAction action(request, newLoadType, isFormSubmission, event, frameLoadRequest.shouldOpenExternalURLsPolicy()); if (!targetFrame && !frameName.isEmpty()) { action = action.copyWithShouldOpenExternalURLsPolicy(shouldOpenExternalURLsPolicyToApply(m_frame, frameLoadRequest.shouldOpenExternalURLsPolicy())); policyChecker().checkNewWindowPolicy(action, request, formState.release(), frameName, [this, allowNavigationToInvalidURL, openerPolicy](const ResourceRequest& request, PassRefPtr formState, const String& frameName, const NavigationAction& action, bool shouldContinue) { continueLoadAfterNewWindowPolicy(request, formState, frameName, action, shouldContinue, allowNavigationToInvalidURL, openerPolicy); }); return; } RefPtr oldDocumentLoader = m_documentLoader; bool sameURL = shouldTreatURLAsSameAsCurrent(newURL); const String& httpMethod = request.httpMethod(); // Make sure to do scroll to fragment processing even if the URL is // exactly the same so pages with '#' links and DHTML side effects // work properly. if (shouldPerformFragmentNavigation(isFormSubmission, httpMethod, newLoadType, newURL)) { oldDocumentLoader->setTriggeringAction(action); oldDocumentLoader->setLastCheckedRequest(ResourceRequest()); policyChecker().stopCheck(); policyChecker().setLoadType(newLoadType); policyChecker().checkNavigationPolicy(request, oldDocumentLoader.get(), formState.release(), [this](const ResourceRequest& request, PassRefPtr, bool shouldContinue) { continueFragmentScrollAfterNavigationPolicy(request, shouldContinue); }); return; } // must grab this now, since this load may stop the previous load and clear this flag bool isRedirect = m_quickRedirectComing; loadWithNavigationAction(request, action, lockHistory, newLoadType, formState.release(), allowNavigationToInvalidURL); if (isRedirect) { m_quickRedirectComing = false; if (m_provisionalDocumentLoader) m_provisionalDocumentLoader->setIsClientRedirect(true); } else if (sameURL && newLoadType != FrameLoadType::Reload && newLoadType != FrameLoadType::ReloadFromOrigin) { // Example of this case are sites that reload the same URL with a different cookie // driving the generated content, or a master frame with links that drive a target // frame, where the user has clicked on the same link repeatedly. m_loadType = FrameLoadType::Same; } } SubstituteData FrameLoader::defaultSubstituteDataForURL(const URL& url) { if (!shouldTreatURLAsSrcdocDocument(url)) return SubstituteData(); String srcdoc = m_frame.ownerElement()->fastGetAttribute(srcdocAttr); ASSERT(!srcdoc.isNull()); CString encodedSrcdoc = srcdoc.utf8(); ResourceResponse response(URL(), ASCIILiteral("text/html"), encodedSrcdoc.length(), ASCIILiteral("UTF-8")); return SubstituteData(SharedBuffer::create(encodedSrcdoc.data(), encodedSrcdoc.length()), URL(), response, SubstituteData::SessionHistoryVisibility::Hidden); } void FrameLoader::load(const FrameLoadRequest& passedRequest) { FrameLoadRequest request(passedRequest); if (m_inStopAllLoaders) return; if (!request.frameName().isEmpty()) { Frame* frame = findFrameForNavigation(request.frameName()); if (frame) { request.setShouldCheckNewWindowPolicy(false); if (&frame->loader() != this) { frame->loader().load(request); return; } } } if (request.shouldCheckNewWindowPolicy()) { NavigationAction action(request.resourceRequest(), NavigationType::Other, passedRequest.shouldOpenExternalURLsPolicy()); policyChecker().checkNewWindowPolicy(action, request.resourceRequest(), nullptr, request.frameName(), [this](const ResourceRequest& request, PassRefPtr formState, const String& frameName, const NavigationAction& action, bool shouldContinue) { continueLoadAfterNewWindowPolicy(request, formState, frameName, action, shouldContinue, AllowNavigationToInvalidURL::Yes, NewFrameOpenerPolicy::Suppress); }); return; } if (!request.hasSubstituteData()) request.setSubstituteData(defaultSubstituteDataForURL(request.resourceRequest().url())); Ref loader = m_client.createDocumentLoader(request.resourceRequest(), request.substituteData()); applyShouldOpenExternalURLsPolicyToNewDocumentLoader(loader, request.shouldOpenExternalURLsPolicy()); load(loader.ptr()); } void FrameLoader::loadWithNavigationAction(const ResourceRequest& request, const NavigationAction& action, LockHistory lockHistory, FrameLoadType type, PassRefPtr formState, AllowNavigationToInvalidURL allowNavigationToInvalidURL) { Ref loader = m_client.createDocumentLoader(request, defaultSubstituteDataForURL(request.url())); applyShouldOpenExternalURLsPolicyToNewDocumentLoader(loader, action.shouldOpenExternalURLsPolicy()); if (lockHistory == LockHistory::Yes && m_documentLoader) loader->setClientRedirectSourceForHistory(m_documentLoader->didCreateGlobalHistoryEntry() ? m_documentLoader->urlForHistory().string() : m_documentLoader->clientRedirectSourceForHistory()); loader->setTriggeringAction(action); if (m_documentLoader) loader->setOverrideEncoding(m_documentLoader->overrideEncoding()); loadWithDocumentLoader(loader.ptr(), type, formState, allowNavigationToInvalidURL); } void FrameLoader::load(DocumentLoader* newDocumentLoader) { ResourceRequest& r = newDocumentLoader->request(); addExtraFieldsToMainResourceRequest(r); FrameLoadType type; if (shouldTreatURLAsSameAsCurrent(newDocumentLoader->originalRequest().url())) { r.setCachePolicy(ReloadIgnoringCacheData); type = FrameLoadType::Same; } else if (shouldTreatURLAsSameAsCurrent(newDocumentLoader->unreachableURL()) && m_loadType == FrameLoadType::Reload) type = FrameLoadType::Reload; else type = FrameLoadType::Standard; if (m_documentLoader) newDocumentLoader->setOverrideEncoding(m_documentLoader->overrideEncoding()); // When we loading alternate content for an unreachable URL that we're // visiting in the history list, we treat it as a reload so the history list // is appropriately maintained. // // FIXME: This seems like a dangerous overloading of the meaning of "FrameLoadType::Reload" ... // shouldn't a more explicit type of reload be defined, that means roughly // "load without affecting history" ? if (shouldReloadToHandleUnreachableURL(newDocumentLoader)) { // shouldReloadToHandleUnreachableURL() returns true only when the original load type is back-forward. // In this case we should save the document state now. Otherwise the state can be lost because load type is // changed and updateForBackForwardNavigation() will not be called when loading is committed. history().saveDocumentAndScrollState(); ASSERT(type == FrameLoadType::Standard); type = FrameLoadType::Reload; } loadWithDocumentLoader(newDocumentLoader, type, 0, AllowNavigationToInvalidURL::Yes); } static void logNavigation(MainFrame& frame, FrameLoadType type) { String navigationDescription; switch (type) { case FrameLoadType::Standard: navigationDescription = ASCIILiteral("standard"); break; case FrameLoadType::Back: navigationDescription = ASCIILiteral("back"); break; case FrameLoadType::Forward: navigationDescription = ASCIILiteral("forward"); break; case FrameLoadType::IndexedBackForward: navigationDescription = ASCIILiteral("indexedBackForward"); break; case FrameLoadType::Reload: navigationDescription = ASCIILiteral("reload"); break; case FrameLoadType::Same: navigationDescription = ASCIILiteral("same"); break; case FrameLoadType::ReloadFromOrigin: navigationDescription = ASCIILiteral("reloadFromOrigin"); break; case FrameLoadType::Replace: case FrameLoadType::RedirectWithLockedBackForwardList: // Not logging those for now. return; } frame.diagnosticLoggingClient().logDiagnosticMessage(DiagnosticLoggingKeys::navigationKey(), navigationDescription, ShouldSample::No); } void FrameLoader::loadWithDocumentLoader(DocumentLoader* loader, FrameLoadType type, PassRefPtr prpFormState, AllowNavigationToInvalidURL allowNavigationToInvalidURL) { // Retain because dispatchBeforeLoadEvent may release the last reference to it. Ref protect(m_frame); ASSERT(m_client.hasWebView()); // Unfortunately the view must be non-nil, this is ultimately due // to parser requiring a FrameView. We should fix this dependency. ASSERT(m_frame.view()); if (m_pageDismissalEventBeingDispatched != PageDismissalType::None) return; if (m_frame.document()) m_previousURL = m_frame.document()->url(); // Log main frame navigation types. if (m_frame.isMainFrame()) logNavigation(static_cast(m_frame), type); policyChecker().setLoadType(type); RefPtr formState = prpFormState; bool isFormSubmission = formState; const URL& newURL = loader->request().url(); const String& httpMethod = loader->request().httpMethod(); if (shouldPerformFragmentNavigation(isFormSubmission, httpMethod, policyChecker().loadType(), newURL)) { RefPtr oldDocumentLoader = m_documentLoader; NavigationAction action(loader->request(), policyChecker().loadType(), isFormSubmission); oldDocumentLoader->setTriggeringAction(action); oldDocumentLoader->setLastCheckedRequest(ResourceRequest()); policyChecker().stopCheck(); policyChecker().checkNavigationPolicy(loader->request(), oldDocumentLoader.get(), formState, [this](const ResourceRequest& request, PassRefPtr, bool shouldContinue) { continueFragmentScrollAfterNavigationPolicy(request, shouldContinue); }); return; } if (Frame* parent = m_frame.tree().parent()) loader->setOverrideEncoding(parent->loader().documentLoader()->overrideEncoding()); policyChecker().stopCheck(); setPolicyDocumentLoader(loader); if (loader->triggeringAction().isEmpty()) loader->setTriggeringAction(NavigationAction(loader->request(), policyChecker().loadType(), isFormSubmission)); if (Element* ownerElement = m_frame.ownerElement()) { // We skip dispatching the beforeload event if we've already // committed a real document load because the event would leak // subsequent activity by the frame which the parent frame isn't // supposed to learn. For example, if the child frame navigated to // a new URL, the parent frame shouldn't learn the URL. if (!m_stateMachine.committedFirstRealDocumentLoad() && !ownerElement->dispatchBeforeLoadEvent(loader->request().url().string())) { continueLoadAfterNavigationPolicy(loader->request(), formState, false, allowNavigationToInvalidURL); return; } } policyChecker().checkNavigationPolicy(loader->request(), loader, formState, [this, allowNavigationToInvalidURL](const ResourceRequest& request, PassRefPtr formState, bool shouldContinue) { continueLoadAfterNavigationPolicy(request, formState, shouldContinue, allowNavigationToInvalidURL); }); } void FrameLoader::reportLocalLoadFailed(Frame* frame, const String& url) { ASSERT(!url.isEmpty()); if (!frame) return; frame->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Not allowed to load local resource: " + url); } void FrameLoader::reportBlockedPortFailed(Frame* frame, const String& url) { ASSERT(!url.isEmpty()); if (!frame) return; frame->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Not allowed to use restricted network port: " + url); } const ResourceRequest& FrameLoader::initialRequest() const { return activeDocumentLoader()->originalRequest(); } bool FrameLoader::willLoadMediaElementURL(URL& url) { #if PLATFORM(IOS) // MobileStore depends on the iOS 4.0 era client delegate method because webView:resource:willSendRequest:redirectResponse:fromDataSource // doesn't let them tell when a load request is coming from a media element. See for more details. if (applicationIsMobileStore()) return m_client.shouldLoadMediaElementURL(url); #endif ResourceRequest request(url); unsigned long identifier; ResourceError error; requestFromDelegate(request, identifier, error); notifier().sendRemainingDelegateMessages(m_documentLoader.get(), identifier, request, ResourceResponse(url, String(), -1, String()), 0, -1, -1, error); url = request.url(); return error.isNull(); } bool FrameLoader::shouldReloadToHandleUnreachableURL(DocumentLoader* docLoader) { URL unreachableURL = docLoader->unreachableURL(); if (unreachableURL.isEmpty()) return false; if (!isBackForwardLoadType(policyChecker().loadType())) return false; // We only treat unreachableURLs specially during the delegate callbacks // for provisional load errors and navigation policy decisions. The former // case handles well-formed URLs that can't be loaded, and the latter // case handles malformed URLs and unknown schemes. Loading alternate content // at other times behaves like a standard load. if (policyChecker().delegateIsDecidingNavigationPolicy() || policyChecker().delegateIsHandlingUnimplementablePolicy()) return m_policyDocumentLoader && unreachableURL == m_policyDocumentLoader->request().url(); return unreachableURL == m_provisionalLoadErrorBeingHandledURL; } void FrameLoader::reloadWithOverrideEncoding(const String& encoding) { if (!m_documentLoader) return; ResourceRequest request = m_documentLoader->request(); URL unreachableURL = m_documentLoader->unreachableURL(); if (!unreachableURL.isEmpty()) request.setURL(unreachableURL); // FIXME: If the resource is a result of form submission and is not cached, the form will be silently resubmitted. // We should ask the user for confirmation in this case. request.setCachePolicy(ReturnCacheDataElseLoad); Ref loader = m_client.createDocumentLoader(request, defaultSubstituteDataForURL(request.url())); applyShouldOpenExternalURLsPolicyToNewDocumentLoader(loader, m_documentLoader->shouldOpenExternalURLsPolicyToPropagate()); setPolicyDocumentLoader(loader.ptr()); loader->setOverrideEncoding(encoding); loadWithDocumentLoader(loader.ptr(), FrameLoadType::Reload, 0, AllowNavigationToInvalidURL::Yes); } void FrameLoader::reload(bool endToEndReload, bool contentBlockersEnabled) { if (!m_documentLoader) return; // If a window is created by javascript, its main frame can have an empty but non-nil URL. // Reloading in this case will lose the current contents (see 4151001). if (m_documentLoader->request().url().isEmpty()) return; // Replace error-page URL with the URL we were trying to reach. ResourceRequest initialRequest = m_documentLoader->request(); URL unreachableURL = m_documentLoader->unreachableURL(); if (!unreachableURL.isEmpty()) initialRequest.setURL(unreachableURL); // Create a new document loader for the reload, this will become m_documentLoader eventually, // but first it has to be the "policy" document loader, and then the "provisional" document loader. Ref loader = m_client.createDocumentLoader(initialRequest, defaultSubstituteDataForURL(initialRequest.url())); applyShouldOpenExternalURLsPolicyToNewDocumentLoader(loader, m_documentLoader->shouldOpenExternalURLsPolicyToPropagate()); loader->setUserContentExtensionsEnabled(contentBlockersEnabled); ResourceRequest& request = loader->request(); // FIXME: We don't have a mechanism to revalidate the main resource without reloading at the moment. request.setCachePolicy(ReloadIgnoringCacheData); // If we're about to re-post, set up action so the application can warn the user. if (request.httpMethod() == "POST") loader->setTriggeringAction(NavigationAction(request, NavigationType::FormResubmitted)); loader->setOverrideEncoding(m_documentLoader->overrideEncoding()); loadWithDocumentLoader(loader.ptr(), endToEndReload ? FrameLoadType::ReloadFromOrigin : FrameLoadType::Reload, 0, AllowNavigationToInvalidURL::Yes); } void FrameLoader::stopAllLoaders(ClearProvisionalItemPolicy clearProvisionalItemPolicy) { ASSERT(!m_frame.document() || m_frame.document()->pageCacheState() != Document::InPageCache); if (m_pageDismissalEventBeingDispatched != PageDismissalType::None) return; // If this method is called from within this method, infinite recursion can occur (3442218). Avoid this. if (m_inStopAllLoaders) return; // Calling stopLoading() on the provisional document loader can blow away // the frame from underneath. Ref protect(m_frame); m_inStopAllLoaders = true; policyChecker().stopCheck(); // If no new load is in progress, we should clear the provisional item from history // before we call stopLoading. if (clearProvisionalItemPolicy == ShouldClearProvisionalItem) history().setProvisionalItem(nullptr); for (RefPtr child = m_frame.tree().firstChild(); child; child = child->tree().nextSibling()) child->loader().stopAllLoaders(clearProvisionalItemPolicy); if (m_provisionalDocumentLoader) m_provisionalDocumentLoader->stopLoading(); if (m_documentLoader) m_documentLoader->stopLoading(); setProvisionalDocumentLoader(nullptr); m_checkTimer.stop(); m_inStopAllLoaders = false; } void FrameLoader::stopForUserCancel(bool deferCheckLoadComplete) { // Calling stopAllLoaders can cause the frame to be deallocated, including the frame loader. Ref protectedFrame(m_frame); stopAllLoaders(); #if PLATFORM(IOS) // Lay out immediately when stopping to immediately clear the old page if we just committed this one // but haven't laid out/painted yet. // FIXME: Is this behavior specific to iOS? Or should we expose a setting to toggle this behavior? if (m_frame.view() && !m_frame.view()->didFirstLayout()) m_frame.view()->layout(); #endif if (deferCheckLoadComplete) scheduleCheckLoadComplete(); else if (m_frame.page()) checkLoadComplete(); } DocumentLoader* FrameLoader::activeDocumentLoader() const { if (m_state == FrameStateProvisional) return m_provisionalDocumentLoader.get(); return m_documentLoader.get(); } bool FrameLoader::isLoading() const { DocumentLoader* docLoader = activeDocumentLoader(); if (!docLoader) return false; return docLoader->isLoading(); } bool FrameLoader::frameHasLoaded() const { return m_stateMachine.committedFirstRealDocumentLoad() || (m_provisionalDocumentLoader && !m_stateMachine.creatingInitialEmptyDocument()); } void FrameLoader::setDocumentLoader(DocumentLoader* loader) { if (!loader && !m_documentLoader) return; ASSERT(loader != m_documentLoader); ASSERT(!loader || loader->frameLoader() == this); m_client.prepareForDataSourceReplacement(); detachChildren(); // detachChildren() can trigger this frame's unload event, and therefore // script can run and do just about anything. For example, an unload event that calls // document.write("") on its parent frame can lead to a recursive detachChildren() // invocation for this frame. In that case, we can end up at this point with a // loader that hasn't been deleted but has been detached from its frame. Such a // DocumentLoader has been sufficiently detached that we'll end up in an inconsistent // state if we try to use it. if (loader && !loader->frame()) return; if (m_documentLoader) m_documentLoader->detachFromFrame(); m_documentLoader = loader; } void FrameLoader::setPolicyDocumentLoader(DocumentLoader* loader) { if (m_policyDocumentLoader == loader) return; if (loader) loader->attachToFrame(m_frame); if (m_policyDocumentLoader && m_policyDocumentLoader != m_provisionalDocumentLoader && m_policyDocumentLoader != m_documentLoader) m_policyDocumentLoader->detachFromFrame(); m_policyDocumentLoader = loader; } void FrameLoader::setProvisionalDocumentLoader(DocumentLoader* loader) { ASSERT(!loader || !m_provisionalDocumentLoader); ASSERT(!loader || loader->frameLoader() == this); if (m_provisionalDocumentLoader && m_provisionalDocumentLoader != m_documentLoader) m_provisionalDocumentLoader->detachFromFrame(); m_provisionalDocumentLoader = loader; } void FrameLoader::setState(FrameState newState) { m_state = newState; if (newState == FrameStateProvisional) provisionalLoadStarted(); else if (newState == FrameStateComplete) { frameLoadCompleted(); if (m_documentLoader) m_documentLoader->stopRecordingResponses(); } } void FrameLoader::clearProvisionalLoad() { setProvisionalDocumentLoader(nullptr); m_progressTracker->progressCompleted(); setState(FrameStateComplete); } void FrameLoader::commitProvisionalLoad() { RefPtr pdl = m_provisionalDocumentLoader; Ref protect(m_frame); std::unique_ptr cachedPage; if (m_loadingFromCachedPage && history().provisionalItem()) cachedPage = PageCache::singleton().take(*history().provisionalItem(), m_frame.page()); LOG(PageCache, "WebCoreLoading %s: About to commit provisional load from previous URL '%s' to new URL '%s'", m_frame.tree().uniqueName().string().utf8().data(), m_frame.document() ? m_frame.document()->url().stringCenterEllipsizedToLength().utf8().data() : "", pdl ? pdl->url().stringCenterEllipsizedToLength().utf8().data() : ""); #if PLATFORM(IOS) // In the case where we are not navigating to a cached page, and the system is under (speculative) memory pressure, // we can try to preemptively release some of the pages in the cache. // FIXME: Right now the capacity is 1 on iOS devices with 256 MB of RAM, so this will always blow away the whole // page cache. We could still preemptively prune the page cache while navigating to a cached page if capacity > 1. // See for more details. if (!cachedPage) { if (MemoryPressureHandler::singleton().isUnderMemoryPressure()) { LOG(MemoryPressure, "Pruning page cache because under memory pressure at: %s", __PRETTY_FUNCTION__); LOG(PageCache, "Pruning page cache to 0 due to memory pressure"); // Don't cache any page if we are under memory pressure. PageCache::singleton().pruneToSizeNow(0, PruningReason::MemoryPressure); } else if (systemMemoryLevel() <= memoryLevelThresholdToPrunePageCache) { LOG(MemoryPressure, "Pruning page cache because system memory level is %d at: %s", systemMemoryLevel(), __PRETTY_FUNCTION__); auto& pageCache = PageCache::singleton(); LOG(PageCache, "Pruning page cache to %d due to low memory (level %d less or equal to %d threshold)", pageCache.maxSize() / 2, systemMemoryLevel(), memoryLevelThresholdToPrunePageCache); pageCache.pruneToSizeNow(pageCache.maxSize() / 2, PruningReason::MemoryPressure); } } #endif willTransitionToCommitted(); if (!m_frame.tree().parent() && history().currentItem()) { // Check to see if we need to cache the page we are navigating away from into the back/forward cache. // We are doing this here because we know for sure that a new page is about to be loaded. PageCache::singleton().addIfCacheable(*history().currentItem(), m_frame.page()); #if PLATFORM(IOS) // For top-level navigations, have JSC throw away linked code. The immediate memory savings far // outweigh the cost of recompiling in the case of a future backwards navigation. GCController::singleton().deleteAllLinkedCode(); #endif } if (m_loadType != FrameLoadType::Replace) closeOldDataSources(); if (!cachedPage && !m_stateMachine.creatingInitialEmptyDocument()) m_client.makeRepresentation(pdl.get()); transitionToCommitted(cachedPage.get()); if (pdl && m_documentLoader) { // Check if the destination page is allowed to access the previous page's timing information. Ref securityOrigin(SecurityOrigin::create(pdl->request().url())); m_documentLoader->timing().setHasSameOriginAsPreviousDocument(securityOrigin.get().canRequest(m_previousURL)); } // Call clientRedirectCancelledOrFinished() here so that the frame load delegate is notified that the redirect's // status has changed, if there was a redirect. The frame load delegate may have saved some state about // the redirect in its -webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:. Since we are // just about to commit a new page, there cannot possibly be a pending redirect at this point. if (m_sentRedirectNotification) clientRedirectCancelledOrFinished(false); if (cachedPage && cachedPage->document()) { #if PLATFORM(IOS) // FIXME: CachedPage::restore() would dispatch viewport change notification. However UIKit expects load // commit to happen before any changes to viewport arguments and dealing with this there is difficult. m_frame.page()->chrome().setDispatchViewportDataDidChangeSuppressed(true); #endif prepareForCachedPageRestore(); // Start request for the main resource and dispatch didReceiveResponse before the load is committed for // consistency with all other loads. See https://bugs.webkit.org/show_bug.cgi?id=150927. ResourceError mainResouceError; unsigned long mainResourceIdentifier; ResourceRequest mainResourceRequest(cachedPage->documentLoader()->request()); requestFromDelegate(mainResourceRequest, mainResourceIdentifier, mainResouceError); notifier().dispatchDidReceiveResponse(cachedPage->documentLoader(), mainResourceIdentifier, cachedPage->documentLoader()->response()); // FIXME: This API should be turned around so that we ground CachedPage into the Page. cachedPage->restore(*m_frame.page()); dispatchDidCommitLoad(); #if PLATFORM(IOS) m_frame.page()->chrome().setDispatchViewportDataDidChangeSuppressed(false); m_frame.page()->chrome().dispatchViewportPropertiesDidChange(m_frame.page()->viewportArguments()); #endif // If we have a title let the WebView know about it. StringWithDirection title = m_documentLoader->title(); if (!title.isNull()) m_client.dispatchDidReceiveTitle(title); // Send remaining notifications for the main resource. notifier().sendRemainingDelegateMessages(m_documentLoader.get(), mainResourceIdentifier, mainResourceRequest, ResourceResponse(), nullptr, static_cast(m_documentLoader->response().expectedContentLength()), 0, mainResouceError); checkCompleted(); } else didOpenURL(); LOG(Loading, "WebCoreLoading %s: Finished committing provisional load to URL %s", m_frame.tree().uniqueName().string().utf8().data(), m_frame.document() ? m_frame.document()->url().stringCenterEllipsizedToLength().utf8().data() : ""); if (m_loadType == FrameLoadType::Standard && m_documentLoader->isClientRedirect()) history().updateForClientRedirect(); if (m_loadingFromCachedPage) { #if PLATFORM(IOS) // Note, didReceiveDocType is expected to be called for cached pages. See for more details. if (m_frame.document()->doctype() && m_frame.page()) m_frame.page()->chrome().didReceiveDocType(&m_frame); #endif m_frame.document()->resume(ActiveDOMObject::PageCache); // Force a layout to update view size and thereby update scrollbars. #if PLATFORM(IOS) if (!m_client.forceLayoutOnRestoreFromPageCache()) m_frame.view()->forceLayout(); #else m_frame.view()->forceLayout(); #endif // Main resource delegates were already sent, so we skip the first response here. for (unsigned i = 1; i < m_documentLoader->responses().size(); ++i) { const auto& response = m_documentLoader->responses()[i]; // FIXME: If the WebKit client changes or cancels the request, this is not respected. ResourceError error; unsigned long identifier; ResourceRequest request(response.url()); requestFromDelegate(request, identifier, error); // FIXME: If we get a resource with more than 2B bytes, this code won't do the right thing. // However, with today's computers and networking speeds, this won't happen in practice. // Could be an issue with a giant local file. notifier().sendRemainingDelegateMessages(m_documentLoader.get(), identifier, request, response, 0, static_cast(response.expectedContentLength()), 0, error); } // FIXME: Why only this frame and not parent frames? checkLoadCompleteForThisFrame(); } } void FrameLoader::transitionToCommitted(CachedPage* cachedPage) { ASSERT(m_client.hasWebView()); ASSERT(m_state == FrameStateProvisional); if (m_state != FrameStateProvisional) return; if (FrameView* view = m_frame.view()) { if (ScrollAnimator* scrollAnimator = view->existingScrollAnimator()) scrollAnimator->cancelAnimations(); } m_client.setCopiesOnScroll(); history().updateForCommit(); // The call to closeURL() invokes the unload event handler, which can execute arbitrary // JavaScript. If the script initiates a new load, we need to abandon the current load, // or the two will stomp each other. DocumentLoader* pdl = m_provisionalDocumentLoader.get(); if (m_documentLoader) closeURL(); if (pdl != m_provisionalDocumentLoader) return; // Nothing else can interupt this commit - set the Provisional->Committed transition in stone if (m_documentLoader) m_documentLoader->stopLoadingSubresources(); if (m_documentLoader) m_documentLoader->stopLoadingPlugIns(); setDocumentLoader(m_provisionalDocumentLoader.get()); setProvisionalDocumentLoader(nullptr); if (pdl != m_documentLoader) { ASSERT(m_state == FrameStateComplete); return; } setState(FrameStateCommittedPage); #if ENABLE(TOUCH_EVENTS) && !PLATFORM(IOS) if (m_frame.isMainFrame()) m_frame.page()->chrome().client().needTouchEvents(false); #endif // Handle adding the URL to the back/forward list. DocumentLoader* dl = m_documentLoader.get(); switch (m_loadType) { case FrameLoadType::Forward: case FrameLoadType::Back: case FrameLoadType::IndexedBackForward: if (m_frame.page()) { // If the first load within a frame is a navigation within a back/forward list that was attached // without any of the items being loaded then we need to update the history in a similar manner as // for a standard load with the exception of updating the back/forward list (). if (!m_stateMachine.committedFirstRealDocumentLoad() && m_frame.isMainFrame()) history().updateForStandardLoad(HistoryController::UpdateAllExceptBackForwardList); history().updateForBackForwardNavigation(); // For cached pages, CachedFrame::restore will take care of firing the popstate event with the history item's state object if (history().currentItem() && !cachedPage) m_pendingStateObject = history().currentItem()->stateObject(); // Create a document view for this document, or used the cached view. if (cachedPage) { DocumentLoader* cachedDocumentLoader = cachedPage->documentLoader(); ASSERT(cachedDocumentLoader); cachedDocumentLoader->attachToFrame(m_frame); m_client.transitionToCommittedFromCachedFrame(cachedPage->cachedMainFrame()); } else m_client.transitionToCommittedForNewPage(); } break; case FrameLoadType::Reload: case FrameLoadType::ReloadFromOrigin: case FrameLoadType::Same: case FrameLoadType::Replace: history().updateForReload(); m_client.transitionToCommittedForNewPage(); break; case FrameLoadType::Standard: history().updateForStandardLoad(); if (m_frame.view()) m_frame.view()->setScrollbarsSuppressed(true); m_client.transitionToCommittedForNewPage(); break; case FrameLoadType::RedirectWithLockedBackForwardList: history().updateForRedirectWithLockedBackForwardList(); m_client.transitionToCommittedForNewPage(); break; // FIXME Remove this check when dummy ds is removed (whatever "dummy ds" is). // An exception should be thrown if we're in the FrameLoadTypeUninitialized state. default: ASSERT_NOT_REACHED(); } m_documentLoader->writer().setMIMEType(dl->responseMIMEType()); // Tell the client we've committed this URL. ASSERT(m_frame.view()); if (m_stateMachine.creatingInitialEmptyDocument()) return; if (!m_stateMachine.committedFirstRealDocumentLoad()) m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit); } void FrameLoader::clientRedirectCancelledOrFinished(bool cancelWithLoadInProgress) { // Note that -webView:didCancelClientRedirectForFrame: is called on the frame load delegate even if // the redirect succeeded. We should either rename this API, or add a new method, like // -webView:didFinishClientRedirectForFrame: m_client.dispatchDidCancelClientRedirect(); if (!cancelWithLoadInProgress) m_quickRedirectComing = false; m_sentRedirectNotification = false; } void FrameLoader::clientRedirected(const URL& url, double seconds, double fireDate, LockBackForwardList lockBackForwardList) { m_client.dispatchWillPerformClientRedirect(url, seconds, fireDate); // Remember that we sent a redirect notification to the frame load delegate so that when we commit // the next provisional load, we can send a corresponding -webView:didCancelClientRedirectForFrame: m_sentRedirectNotification = true; // If a "quick" redirect comes in, we set a special mode so we treat the next // load as part of the original navigation. If we don't have a document loader, we have // no "original" load on which to base a redirect, so we treat the redirect as a normal load. // Loads triggered by JavaScript form submissions never count as quick redirects. m_quickRedirectComing = (lockBackForwardList == LockBackForwardList::Yes || history().currentItemShouldBeReplaced()) && m_documentLoader && !m_isExecutingJavaScriptFormAction; } bool FrameLoader::shouldReload(const URL& currentURL, const URL& destinationURL) { // This function implements the rule: "Don't reload if navigating by fragment within // the same URL, but do reload if going to a new URL or to the same URL with no // fragment identifier at all." if (!destinationURL.hasFragmentIdentifier()) return true; return !equalIgnoringFragmentIdentifier(currentURL, destinationURL); } void FrameLoader::closeOldDataSources() { // FIXME: Is it important for this traversal to be postorder instead of preorder? // If so, add helpers for postorder traversal, and use them. If not, then lets not // use a recursive algorithm here. for (Frame* child = m_frame.tree().firstChild(); child; child = child->tree().nextSibling()) child->loader().closeOldDataSources(); if (m_documentLoader) m_client.dispatchWillClose(); m_client.setMainFrameDocumentReady(false); // stop giving out the actual DOMDocument to observers } void FrameLoader::prepareForCachedPageRestore() { ASSERT(!m_frame.tree().parent()); ASSERT(m_frame.page()); ASSERT(m_frame.isMainFrame()); m_frame.navigationScheduler().cancel(); // We still have to close the previous part page. closeURL(); // Delete old status bar messages (if it _was_ activated on last URL). if (m_frame.script().canExecuteScripts(NotAboutToExecuteScript)) { DOMWindow* window = m_frame.document()->domWindow(); window->setStatus(String()); window->setDefaultStatus(String()); } } void FrameLoader::open(CachedFrameBase& cachedFrame) { m_isComplete = false; // Don't re-emit the load event. m_didCallImplicitClose = true; URL url = cachedFrame.url(); // FIXME: I suspect this block of code doesn't do anything. if (url.protocolIsInHTTPFamily() && !url.host().isEmpty() && url.path().isEmpty()) url.setPath("/"); started(); Document* document = cachedFrame.document(); ASSERT(document); ASSERT(document->domWindow()); clear(document, true, true, cachedFrame.isMainFrame()); document->setPageCacheState(Document::NotInPageCache); m_needsClear = true; m_isComplete = false; m_didCallImplicitClose = false; m_outgoingReferrer = url.string(); FrameView* view = cachedFrame.view(); // When navigating to a CachedFrame its FrameView should never be null. If it is we'll crash in creative ways downstream. ASSERT(view); view->setWasScrolledByUser(false); Optional previousViewFrameRect = m_frame.view() ? m_frame.view()->frameRect() : Optional(Nullopt); m_frame.setView(view); // Use the previous ScrollView's frame rect. if (previousViewFrameRect) view->setFrameRect(previousViewFrameRect.value()); m_frame.setDocument(document); document->domWindow()->resumeFromDocumentSuspension(); updateFirstPartyForCookies(); cachedFrame.restore(); } bool FrameLoader::isHostedByObjectElement() const { HTMLFrameOwnerElement* owner = m_frame.ownerElement(); return owner && owner->hasTagName(objectTag); } bool FrameLoader::isReplacing() const { return m_loadType == FrameLoadType::Replace; } void FrameLoader::setReplacing() { m_loadType = FrameLoadType::Replace; } bool FrameLoader::subframeIsLoading() const { // It's most likely that the last added frame is the last to load so we walk backwards. for (Frame* child = m_frame.tree().lastChild(); child; child = child->tree().previousSibling()) { FrameLoader& childLoader = child->loader(); DocumentLoader* documentLoader = childLoader.documentLoader(); if (documentLoader && documentLoader->isLoadingInAPISense()) return true; documentLoader = childLoader.provisionalDocumentLoader(); if (documentLoader && documentLoader->isLoadingInAPISense()) return true; documentLoader = childLoader.policyDocumentLoader(); if (documentLoader) return true; } return false; } void FrameLoader::willChangeTitle(DocumentLoader* loader) { m_client.willChangeTitle(loader); } FrameLoadType FrameLoader::loadType() const { return m_loadType; } CachePolicy FrameLoader::subresourceCachePolicy() const { if (m_isComplete) return CachePolicyVerify; if (m_loadType == FrameLoadType::ReloadFromOrigin) return CachePolicyReload; if (Frame* parentFrame = m_frame.tree().parent()) { CachePolicy parentCachePolicy = parentFrame->loader().subresourceCachePolicy(); if (parentCachePolicy != CachePolicyVerify) return parentCachePolicy; } switch (m_loadType) { case FrameLoadType::Reload: return CachePolicyRevalidate; case FrameLoadType::Back: case FrameLoadType::Forward: case FrameLoadType::IndexedBackForward: return CachePolicyHistoryBuffer; case FrameLoadType::ReloadFromOrigin: ASSERT_NOT_REACHED(); // Already handled above. return CachePolicyReload; case FrameLoadType::RedirectWithLockedBackForwardList: case FrameLoadType::Replace: case FrameLoadType::Same: case FrameLoadType::Standard: return CachePolicyVerify; } RELEASE_ASSERT_NOT_REACHED(); return CachePolicyVerify; } void FrameLoader::checkLoadCompleteForThisFrame() { ASSERT(m_client.hasWebView()); switch (m_state) { case FrameStateProvisional: { // FIXME: Prohibiting any provisional load failures from being sent to clients // while handling provisional load failures is too heavy. For example, the current // load will fail to cancel another ongoing load. That might prevent clients' page // load state being handled properly. if (!m_provisionalLoadErrorBeingHandledURL.isEmpty()) return; RefPtr pdl = m_provisionalDocumentLoader; if (!pdl) return; // If we've received any errors we may be stuck in the provisional state and actually complete. const ResourceError& error = pdl->mainDocumentError(); if (error.isNull()) return; // Check all children first. RefPtr item; if (Page* page = m_frame.page()) if (isBackForwardLoadType(loadType())) // Reset the back forward list to the last committed history item at the top level. item = page->mainFrame().loader().history().currentItem(); // Only reset if we aren't already going to a new provisional item. bool shouldReset = !history().provisionalItem(); if (!pdl->isLoadingInAPISense() || pdl->isStopping()) { m_provisionalLoadErrorBeingHandledURL = m_provisionalDocumentLoader->url(); m_client.dispatchDidFailProvisionalLoad(error); m_provisionalLoadErrorBeingHandledURL = { }; ASSERT(!pdl->isLoading()); // If we're in the middle of loading multipart data, we need to restore the document loader. if (isReplacing() && !m_documentLoader.get()) setDocumentLoader(m_provisionalDocumentLoader.get()); // Finish resetting the load state, but only if another load hasn't been started by the // delegate callback. if (pdl == m_provisionalDocumentLoader) clearProvisionalLoad(); else if (activeDocumentLoader()) { URL unreachableURL = activeDocumentLoader()->unreachableURL(); if (!unreachableURL.isEmpty() && unreachableURL == pdl->request().url()) shouldReset = false; } } if (shouldReset && item) if (Page* page = m_frame.page()) { page->backForward().setCurrentItem(item.get()); m_frame.loader().client().updateGlobalHistoryItemForPage(); } return; } case FrameStateCommittedPage: { DocumentLoader* dl = m_documentLoader.get(); if (!dl || (dl->isLoadingInAPISense() && !dl->isStopping())) return; setState(FrameStateComplete); // FIXME: Is this subsequent work important if we already navigated away? // Maybe there are bugs because of that, or extra work we can skip because // the new page is ready. m_client.forceLayoutForNonHTML(); // If the user had a scroll point, scroll to it, overriding the anchor point if any. if (m_frame.page()) { if (isBackForwardLoadType(m_loadType) || m_loadType == FrameLoadType::Reload || m_loadType == FrameLoadType::ReloadFromOrigin) history().restoreScrollPositionAndViewState(); } if (m_stateMachine.creatingInitialEmptyDocument() || !m_stateMachine.committedFirstRealDocumentLoad()) return; m_progressTracker->progressCompleted(); Page* page = m_frame.page(); if (page) { if (m_frame.isMainFrame()) page->resetRelevantPaintedObjectCounter(); } const ResourceError& error = dl->mainDocumentError(); AXObjectCache::AXLoadingEvent loadingEvent; if (!error.isNull()) { m_client.dispatchDidFailLoad(error); loadingEvent = AXObjectCache::AXLoadingFailed; } else { #if ENABLE(DATA_DETECTION) if (m_frame.settings().dataDetectorTypes() != DataDetectorTypeNone) { RefPtr documentRange = makeRange(firstPositionInNode(m_frame.document()->documentElement()), lastPositionInNode(m_frame.document()->documentElement())); m_frame.setDataDetectionResults(DataDetection::detectContentInRange(documentRange, m_frame.settings().dataDetectorTypes())); if (m_frame.isMainFrame()) m_client.dispatchDidFinishDataDetection(m_frame.dataDetectionResults()); } #endif m_client.dispatchDidFinishLoad(); loadingEvent = AXObjectCache::AXLoadingFinished; } // Notify accessibility. if (AXObjectCache* cache = m_frame.document()->existingAXObjectCache()) cache->frameLoadingEventNotification(&m_frame, loadingEvent); // The above calls to dispatchDidFinishLoad() might have detached the Frame // from its Page and also might have caused Page to be deleted. // Don't assume 'page' is still available to use. if (m_frame.isMainFrame() && m_frame.page()) { ASSERT(&m_frame.page()->mainFrame() == &m_frame); m_frame.page()->mainFrame().diagnosticLoggingClient().logDiagnosticMessageWithResult(DiagnosticLoggingKeys::pageLoadedKey(), emptyString(), error.isNull() ? DiagnosticLoggingResultPass : DiagnosticLoggingResultFail, ShouldSample::Yes); } return; } case FrameStateComplete: m_loadType = FrameLoadType::Standard; frameLoadCompleted(); return; } ASSERT_NOT_REACHED(); } void FrameLoader::continueLoadAfterWillSubmitForm() { if (!m_provisionalDocumentLoader) return; prepareForLoadStart(); // The load might be cancelled inside of prepareForLoadStart(), nulling out the m_provisionalDocumentLoader, // so we need to null check it again. if (!m_provisionalDocumentLoader) return; DocumentLoader* activeDocLoader = activeDocumentLoader(); if (activeDocLoader && activeDocLoader->isLoadingMainResource()) return; m_loadingFromCachedPage = false; m_provisionalDocumentLoader->startLoadingMainResource(); } static URL originatingURLFromBackForwardList(Page* page) { // FIXME: Can this logic be replaced with m_frame.document()->firstPartyForCookies()? // It has the same meaning of "page a user thinks is the current one". URL originalURL; int backCount = page->backForward().backCount(); for (int backIndex = 0; backIndex <= backCount; backIndex++) { // FIXME: At one point we had code here to check a "was user gesture" flag. // Do we need to restore that logic? HistoryItem* historyItem = page->backForward().itemAtIndex(-backIndex); if (!historyItem) continue; originalURL = historyItem->originalURL(); if (!originalURL.isNull()) return originalURL; } return URL(); } void FrameLoader::setOriginalURLForDownloadRequest(ResourceRequest& request) { URL originalURL; // If there is no referrer, assume that the download was initiated directly, so current document is // completely unrelated to it. See . // FIXME: Referrer is not sent in many other cases, so we will often miss this important information. // Find a better way to decide whether the download was unrelated to current document. if (!request.httpReferrer().isNull()) { // find the first item in the history that was originated by the user originalURL = originatingURLFromBackForwardList(m_frame.page()); } if (originalURL.isNull()) originalURL = request.url(); if (!originalURL.protocol().isEmpty() && !originalURL.host().isEmpty()) { unsigned port = originalURL.port(); // Original URL is needed to show the user where a file was downloaded from. We should make a URL that won't result in downloading the file again. // FIXME: Using host-only URL is a very heavy-handed approach. We should attempt to provide the actual page where the download was initiated from, as a reminder to the user. String hostOnlyURLString; if (port) hostOnlyURLString = makeString(originalURL.protocol(), "://", originalURL.host(), ':', String::number(port)); else hostOnlyURLString = makeString(originalURL.protocol(), "://", originalURL.host()); // FIXME: Rename firstPartyForCookies back to mainDocumentURL. It was a mistake to think that it was only used for cookies. request.setFirstPartyForCookies(URL(URL(), hostOnlyURLString)); } } void FrameLoader::didLayout(LayoutMilestones milestones) { ASSERT(m_frame.isMainFrame()); m_client.dispatchDidLayout(milestones); } void FrameLoader::didFirstLayout() { #if PLATFORM(IOS) // Only send layout-related delegate callbacks synchronously for the main frame to // avoid reentering layout for the main frame while delivering a layout-related delegate // callback for a subframe. if (&m_frame != &m_frame.page()->mainFrame()) return; #endif if (m_frame.page() && isBackForwardLoadType(m_loadType)) history().restoreScrollPositionAndViewState(); if (m_stateMachine.committedFirstRealDocumentLoad() && !m_stateMachine.isDisplayingInitialEmptyDocument() && !m_stateMachine.firstLayoutDone()) m_stateMachine.advanceTo(FrameLoaderStateMachine::FirstLayoutDone); } void FrameLoader::frameLoadCompleted() { // Note: Can be called multiple times. m_client.frameLoadCompleted(); history().updateForFrameLoadCompleted(); // After a canceled provisional load, firstLayoutDone is false. // Reset it to true if we're displaying a page. if (m_documentLoader && m_stateMachine.committedFirstRealDocumentLoad() && !m_stateMachine.isDisplayingInitialEmptyDocument() && !m_stateMachine.firstLayoutDone()) m_stateMachine.advanceTo(FrameLoaderStateMachine::FirstLayoutDone); } void FrameLoader::detachChildren() { // detachChildren() will fire the unload event in each subframe and the // HTML specification states that the parent document's ignore-opens-during-unload counter while // this event is being fired in its subframes: // https://html.spec.whatwg.org/multipage/browsers.html#unload-a-document IgnoreOpensDuringUnloadCountIncrementer ignoreOpensDuringUnloadCountIncrementer(m_frame.document()); Vector, 16> childrenToDetach; childrenToDetach.reserveInitialCapacity(m_frame.tree().childCount()); for (Frame* child = m_frame.tree().lastChild(); child; child = child->tree().previousSibling()) childrenToDetach.uncheckedAppend(*child); for (auto& child : childrenToDetach) child->loader().detachFromParent(); } void FrameLoader::closeAndRemoveChild(Frame* child) { child->tree().detachFromParent(); child->setView(nullptr); if (child->ownerElement() && child->page()) child->page()->decrementSubframeCount(); child->willDetachPage(); child->detachFromPage(); m_frame.tree().removeChild(child); } // Called every time a resource is completely loaded or an error is received. void FrameLoader::checkLoadComplete() { ASSERT(m_client.hasWebView()); m_shouldCallCheckLoadComplete = false; if (!m_frame.page()) return; // FIXME: Always traversing the entire frame tree is a bit inefficient, but // is currently needed in order to null out the previous history item for all frames. Vector, 16> frames; for (Frame* frame = &m_frame.mainFrame(); frame; frame = frame->tree().traverseNext()) frames.append(*frame); // To process children before their parents, iterate the vector backwards. for (auto frame = frames.rbegin(); frame != frames.rend(); ++frame) { if ((*frame)->page()) (*frame)->loader().checkLoadCompleteForThisFrame(); } } int FrameLoader::numPendingOrLoadingRequests(bool recurse) const { if (!recurse) return m_frame.document()->cachedResourceLoader().requestCount(); int count = 0; for (Frame* frame = &m_frame; frame; frame = frame->tree().traverseNext(&m_frame)) count += frame->document()->cachedResourceLoader().requestCount(); return count; } String FrameLoader::userAgent(const URL& url) const { return m_client.userAgent(url); } void FrameLoader::dispatchOnloadEvents() { m_client.dispatchDidDispatchOnloadEvents(); if (documentLoader()) documentLoader()->dispatchOnloadEvents(); } void FrameLoader::frameDetached() { // Calling stopAllLoaders can cause the frame to be deallocated, including the frame loader. Ref protectedFrame(m_frame); stopAllLoaders(); m_frame.document()->stopActiveDOMObjects(); detachFromParent(); } void FrameLoader::detachFromParent() { Ref protect(m_frame); closeURL(); history().saveScrollPositionAndViewStateToItem(history().currentItem()); detachChildren(); // stopAllLoaders() needs to be called after detachChildren(), because detachedChildren() // will trigger the unload event handlers of any child frames, and those event // handlers might start a new subresource load in this frame. stopAllLoaders(); InspectorInstrumentation::frameDetachedFromParent(m_frame); detachViewsAndDocumentLoader(); m_progressTracker = nullptr; if (Frame* parent = m_frame.tree().parent()) { parent->loader().closeAndRemoveChild(&m_frame); parent->loader().scheduleCheckCompleted(); } else { m_frame.setView(nullptr); m_frame.willDetachPage(); m_frame.detachFromPage(); } } void FrameLoader::detachViewsAndDocumentLoader() { m_client.detachedFromParent2(); setDocumentLoader(nullptr); m_client.detachedFromParent3(); } void FrameLoader::addExtraFieldsToSubresourceRequest(ResourceRequest& request) { addExtraFieldsToRequest(request, m_loadType, false); } void FrameLoader::addExtraFieldsToMainResourceRequest(ResourceRequest& request) { // FIXME: Using m_loadType seems wrong for some callers. // If we are only preparing to load the main resource, that is previous load's load type! addExtraFieldsToRequest(request, m_loadType, true); } void FrameLoader::addExtraFieldsToRequest(ResourceRequest& request, FrameLoadType loadType, bool mainResource) { // Don't set the cookie policy URL if it's already been set. // But make sure to set it on all requests regardless of protocol, as it has significance beyond the cookie policy (). if (request.firstPartyForCookies().isEmpty()) { if (mainResource && m_frame.isMainFrame()) request.setFirstPartyForCookies(request.url()); else if (Document* document = m_frame.document()) request.setFirstPartyForCookies(document->firstPartyForCookies()); } // The remaining modifications are only necessary for HTTP and HTTPS. if (!request.url().isEmpty() && !request.url().protocolIsInHTTPFamily()) return; applyUserAgent(request); if (!mainResource) { if (request.isConditional()) request.setCachePolicy(ReloadIgnoringCacheData); else if (documentLoader()->isLoadingInAPISense()) { // If we inherit cache policy from a main resource, we use the DocumentLoader's // original request cache policy for two reasons: // 1. For POST requests, we mutate the cache policy for the main resource, // but we do not want this to apply to subresources // 2. Delegates that modify the cache policy using willSendRequest: should // not affect any other resources. Such changes need to be done // per request. ResourceRequestCachePolicy mainDocumentOriginalCachePolicy = documentLoader()->originalRequest().cachePolicy(); // Back-forward navigations try to load main resource from cache only to avoid re-submitting form data, and start over (with a warning dialog) if that fails. // This policy is set on initial request too, but should not be inherited. ResourceRequestCachePolicy subresourceCachePolicy = (mainDocumentOriginalCachePolicy == ReturnCacheDataDontLoad) ? ReturnCacheDataElseLoad : mainDocumentOriginalCachePolicy; request.setCachePolicy(subresourceCachePolicy); } else request.setCachePolicy(UseProtocolCachePolicy); // FIXME: Other FrameLoader functions have duplicated code for setting cache policy of main request when reloading. // It seems better to manage it explicitly than to hide the logic inside addExtraFieldsToRequest(). } else if (loadType == FrameLoadType::Reload || loadType == FrameLoadType::ReloadFromOrigin || request.isConditional()) request.setCachePolicy(ReloadIgnoringCacheData); if (m_overrideCachePolicyForTesting) request.setCachePolicy(m_overrideCachePolicyForTesting.value()); if (m_overrideResourceLoadPriorityForTesting) request.setPriority(m_overrideResourceLoadPriorityForTesting.value()); if (request.cachePolicy() == ReloadIgnoringCacheData) { if (loadType == FrameLoadType::Reload) request.setHTTPHeaderField(HTTPHeaderName::CacheControl, "max-age=0"); else if (loadType == FrameLoadType::ReloadFromOrigin) { request.setHTTPHeaderField(HTTPHeaderName::CacheControl, "no-cache"); request.setHTTPHeaderField(HTTPHeaderName::Pragma, "no-cache"); } } if (mainResource) request.setHTTPAccept(defaultAcceptHeader); // Make sure we send the Origin header. addHTTPOriginIfNeeded(request, String()); // Only set fallback array if it's still empty (later attempts may be incorrect, see bug 117818). if (request.responseContentDispositionEncodingFallbackArray().isEmpty()) { // Always try UTF-8. If that fails, try frame encoding (if any) and then the default. request.setResponseContentDispositionEncodingFallbackArray("UTF-8", m_frame.document()->encoding(), m_frame.settings().defaultTextEncodingName()); } } void FrameLoader::addHTTPOriginIfNeeded(ResourceRequest& request, const String& origin) { if (!request.httpOrigin().isEmpty()) return; // Request already has an Origin header. // Don't send an Origin header for GET or HEAD to avoid privacy issues. // For example, if an intranet page has a hyperlink to an external web // site, we don't want to include the Origin of the request because it // will leak the internal host name. Similar privacy concerns have lead // to the widespread suppression of the Referer header at the network // layer. if (request.httpMethod() == "GET" || request.httpMethod() == "HEAD") return; // For non-GET and non-HEAD methods, always send an Origin header so the // server knows we support this feature. if (origin.isEmpty()) { // If we don't know what origin header to attach, we attach the value // for an empty origin. request.setHTTPOrigin(SecurityOrigin::createUnique()->toString()); return; } request.setHTTPOrigin(origin); } void FrameLoader::loadPostRequest(const FrameLoadRequest& request, const String& referrer, FrameLoadType loadType, Event* event, PassRefPtr prpFormState) { RefPtr formState = prpFormState; String frameName = request.frameName(); LockHistory lockHistory = request.lockHistory(); AllowNavigationToInvalidURL allowNavigationToInvalidURL = request.allowNavigationToInvalidURL(); NewFrameOpenerPolicy openerPolicy = request.newFrameOpenerPolicy(); const ResourceRequest& inRequest = request.resourceRequest(); const URL& url = inRequest.url(); const String& contentType = inRequest.httpContentType(); String origin = inRequest.httpOrigin(); ResourceRequest workingResourceRequest(url); if (!referrer.isEmpty()) workingResourceRequest.setHTTPReferrer(referrer); workingResourceRequest.setHTTPOrigin(origin); workingResourceRequest.setHTTPMethod("POST"); workingResourceRequest.setHTTPBody(inRequest.httpBody()); workingResourceRequest.setHTTPContentType(contentType); addExtraFieldsToRequest(workingResourceRequest, loadType, true); NavigationAction action(workingResourceRequest, loadType, true, event, request.shouldOpenExternalURLsPolicy()); if (!frameName.isEmpty()) { // The search for a target frame is done earlier in the case of form submission. if (Frame* targetFrame = formState ? 0 : findFrameForNavigation(frameName)) { targetFrame->loader().loadWithNavigationAction(workingResourceRequest, action, lockHistory, loadType, formState.release(), allowNavigationToInvalidURL); return; } policyChecker().checkNewWindowPolicy(action, workingResourceRequest, formState.release(), frameName, [this, allowNavigationToInvalidURL, openerPolicy](const ResourceRequest& request, PassRefPtr formState, const String& frameName, const NavigationAction& action, bool shouldContinue) { continueLoadAfterNewWindowPolicy(request, formState, frameName, action, shouldContinue, allowNavigationToInvalidURL, openerPolicy); }); return; } // must grab this now, since this load may stop the previous load and clear this flag bool isRedirect = m_quickRedirectComing; loadWithNavigationAction(workingResourceRequest, action, lockHistory, loadType, formState.release(), allowNavigationToInvalidURL); if (isRedirect) { m_quickRedirectComing = false; if (m_provisionalDocumentLoader) m_provisionalDocumentLoader->setIsClientRedirect(true); } } unsigned long FrameLoader::loadResourceSynchronously(const ResourceRequest& request, StoredCredentials storedCredentials, ClientCredentialPolicy clientCredentialPolicy, ResourceError& error, ResourceResponse& response, RefPtr& data) { ASSERT(m_frame.document()); String referrer = SecurityPolicy::generateReferrerHeader(m_frame.document()->referrerPolicy(), request.url(), outgoingReferrer()); ResourceRequest initialRequest = request; initialRequest.setTimeoutInterval(10); if (!referrer.isEmpty()) initialRequest.setHTTPReferrer(referrer); addHTTPOriginIfNeeded(initialRequest, outgoingOrigin()); initialRequest.setFirstPartyForCookies(m_frame.mainFrame().loader().documentLoader()->request().url()); addExtraFieldsToSubresourceRequest(initialRequest); unsigned long identifier = 0; ResourceRequest newRequest(initialRequest); requestFromDelegate(newRequest, identifier, error); #if ENABLE(CONTENT_EXTENSIONS) if (error.isNull()) { if (auto* page = m_frame.page()) { if (auto* controller = page->userContentController()) { if (m_documentLoader && controller->processContentExtensionRulesForLoad(newRequest, ResourceType::Raw, *m_documentLoader) == ContentExtensions::BlockedStatus::Blocked) { newRequest = { }; error = ResourceError(errorDomainWebKitInternal, 0, initialRequest.url(), emptyString()); response = { }; data = nullptr; } } } } #endif if (error.isNull()) { ASSERT(!newRequest.isNull()); if (!documentLoader()->applicationCacheHost()->maybeLoadSynchronously(newRequest, error, response, data)) { Vector buffer; platformStrategies()->loaderStrategy()->loadResourceSynchronously(networkingContext(), identifier, newRequest, storedCredentials, clientCredentialPolicy, error, response, buffer); data = SharedBuffer::adoptVector(buffer); documentLoader()->applicationCacheHost()->maybeLoadFallbackSynchronously(newRequest, error, response, data); } } notifier().sendRemainingDelegateMessages(m_documentLoader.get(), identifier, request, response, data ? data->data() : nullptr, data ? data->size() : 0, -1, error); return identifier; } const ResourceRequest& FrameLoader::originalRequest() const { return activeDocumentLoader()->originalRequestCopy(); } void FrameLoader::receivedMainResourceError(const ResourceError& error) { // Retain because the stop may release the last reference to it. Ref protect(m_frame); RefPtr loader = activeDocumentLoader(); // FIXME: Don't want to do this if an entirely new load is going, so should check // that both data sources on the frame are either this or nil. stop(); if (m_client.shouldFallBack(error)) handleFallbackContent(); if (m_state == FrameStateProvisional && m_provisionalDocumentLoader) { if (m_submittedFormURL == m_provisionalDocumentLoader->originalRequestCopy().url()) m_submittedFormURL = URL(); // We might have made a page cache item, but now we're bailing out due to an error before we ever // transitioned to the new page (before WebFrameState == commit). The goal here is to restore any state // so that the existing view (that wenever got far enough to replace) can continue being used. history().invalidateCurrentItemCachedPage(); // Call clientRedirectCancelledOrFinished here so that the frame load delegate is notified that the redirect's // status has changed, if there was a redirect. The frame load delegate may have saved some state about // the redirect in its -webView:willPerformClientRedirectToURL:delay:fireDate:forFrame:. Since we are definitely // not going to use this provisional resource, as it was cancelled, notify the frame load delegate that the redirect // has ended. if (m_sentRedirectNotification) clientRedirectCancelledOrFinished(false); } checkCompleted(); if (m_frame.page()) checkLoadComplete(); } void FrameLoader::continueFragmentScrollAfterNavigationPolicy(const ResourceRequest& request, bool shouldContinue) { m_quickRedirectComing = false; if (!shouldContinue) return; // Calling stopLoading() on the provisional document loader can cause the underlying // frame to be deallocated. Ref protectedFrame(m_frame); // If we have a provisional request for a different document, a fragment scroll should cancel it. if (m_provisionalDocumentLoader && !equalIgnoringFragmentIdentifier(m_provisionalDocumentLoader->request().url(), request.url())) { m_provisionalDocumentLoader->stopLoading(); setProvisionalDocumentLoader(nullptr); } bool isRedirect = m_quickRedirectComing || policyChecker().loadType() == FrameLoadType::RedirectWithLockedBackForwardList; loadInSameDocument(request.url(), 0, !isRedirect); } bool FrameLoader::shouldPerformFragmentNavigation(bool isFormSubmission, const String& httpMethod, FrameLoadType loadType, const URL& url) { // We don't do this if we are submitting a form with method other than "GET", explicitly reloading, // currently displaying a frameset, or if the URL does not have a fragment. // These rules were originally based on what KHTML was doing in KHTMLPart::openURL. // FIXME: What about load types other than Standard and Reload? return (!isFormSubmission || equalLettersIgnoringASCIICase(httpMethod, "get")) && loadType != FrameLoadType::Reload && loadType != FrameLoadType::ReloadFromOrigin && loadType != FrameLoadType::Same && !shouldReload(m_frame.document()->url(), url) // We don't want to just scroll if a link from within a // frameset is trying to reload the frameset into _top. && !m_frame.document()->isFrameSet(); } void FrameLoader::scrollToFragmentWithParentBoundary(const URL& url) { FrameView* view = m_frame.view(); if (!view) return; // Leaking scroll position to a cross-origin ancestor would permit the so-called "framesniffing" attack. RefPtr boundaryFrame(url.hasFragmentIdentifier() ? m_frame.document()->findUnsafeParentScrollPropagationBoundary() : 0); if (boundaryFrame) boundaryFrame->view()->setSafeToPropagateScrollToParent(false); view->scrollToFragment(url); if (boundaryFrame) boundaryFrame->view()->setSafeToPropagateScrollToParent(true); } bool FrameLoader::shouldClose() { Page* page = m_frame.page(); if (!page) return true; if (!page->chrome().canRunBeforeUnloadConfirmPanel()) return true; // Store all references to each subframe in advance since beforeunload's event handler may modify frame Vector, 16> targetFrames; targetFrames.append(m_frame); for (Frame* child = m_frame.tree().firstChild(); child; child = child->tree().traverseNext(&m_frame)) targetFrames.append(*child); bool shouldClose = false; { NavigationDisablerForBeforeUnload navigationDisabler; size_t i; for (i = 0; i < targetFrames.size(); i++) { if (!targetFrames[i]->tree().isDescendantOf(&m_frame)) continue; if (!targetFrames[i]->loader().dispatchBeforeUnloadEvent(page->chrome(), this)) break; } if (i == targetFrames.size()) shouldClose = true; } if (!shouldClose) m_submittedFormURL = URL(); m_currentNavigationHasShownBeforeUnloadConfirmPanel = false; return shouldClose; } void FrameLoader::dispatchUnloadEvents(UnloadEventPolicy unloadEventPolicy) { if (!m_frame.document()) return; // We store the frame's page in a local variable because the frame might get detached inside dispatchEvent. ForbidPromptsScope forbidPrompts(m_frame.page()); IgnoreOpensDuringUnloadCountIncrementer ignoreOpensDuringUnloadCountIncrementer(m_frame.document()); if (m_didCallImplicitClose && !m_wasUnloadEventEmitted) { auto* currentFocusedElement = m_frame.document()->focusedElement(); if (is(currentFocusedElement)) downcast(*currentFocusedElement).endEditing(); if (m_pageDismissalEventBeingDispatched == PageDismissalType::None) { if (unloadEventPolicy == UnloadEventPolicyUnloadAndPageHide) { m_pageDismissalEventBeingDispatched = PageDismissalType::PageHide; m_frame.document()->domWindow()->dispatchEvent(PageTransitionEvent::create(eventNames().pagehideEvent, m_frame.document()->inPageCache()), m_frame.document()); } // FIXME: update Page Visibility state here. // https://bugs.webkit.org/show_bug.cgi?id=116770 if (!m_frame.document()->inPageCache()) { Ref unloadEvent(Event::create(eventNames().unloadEvent, false, false)); // The DocumentLoader (and thus its DocumentLoadTiming) might get destroyed // while dispatching the event, so protect it to prevent writing the end // time into freed memory. RefPtr documentLoader = m_provisionalDocumentLoader; m_pageDismissalEventBeingDispatched = PageDismissalType::Unload; if (documentLoader && documentLoader->timing().navigationStart() && !documentLoader->timing().unloadEventStart() && !documentLoader->timing().unloadEventEnd()) { auto& timing = documentLoader->timing(); timing.markUnloadEventStart(); m_frame.document()->domWindow()->dispatchEvent(unloadEvent, m_frame.document()); timing.markUnloadEventEnd(); } else m_frame.document()->domWindow()->dispatchEvent(unloadEvent, m_frame.document()); } } m_pageDismissalEventBeingDispatched = PageDismissalType::None; if (m_frame.document()) m_frame.document()->updateStyleIfNeeded(); m_wasUnloadEventEmitted = true; } // Dispatching the unload event could have made m_frame.document() null. if (!m_frame.document()) return; if (m_frame.document()->inPageCache()) return; // Don't remove event listeners from a transitional empty document (see bug 28716 for more information). bool keepEventListeners = m_stateMachine.isDisplayingInitialEmptyDocument() && m_provisionalDocumentLoader && m_frame.document()->isSecureTransitionTo(m_provisionalDocumentLoader->url()); if (!keepEventListeners) m_frame.document()->removeAllEventListeners(); } bool FrameLoader::dispatchBeforeUnloadEvent(Chrome& chrome, FrameLoader* frameLoaderBeingNavigated) { DOMWindow* domWindow = m_frame.document()->domWindow(); if (!domWindow) return true; RefPtr document = m_frame.document(); if (!document->bodyOrFrameset()) return true; Ref beforeUnloadEvent = BeforeUnloadEvent::create(); m_pageDismissalEventBeingDispatched = PageDismissalType::BeforeUnload; { ForbidPromptsScope forbidPrompts(m_frame.page()); IgnoreOpensDuringUnloadCountIncrementer ignoreOpensDuringUnloadCountIncrementer(m_frame.document()); domWindow->dispatchEvent(beforeUnloadEvent, domWindow->document()); } m_pageDismissalEventBeingDispatched = PageDismissalType::None; if (!beforeUnloadEvent->defaultPrevented()) document->defaultEventHandler(beforeUnloadEvent.ptr()); if (beforeUnloadEvent->returnValue().isNull()) return true; // If the navigating FrameLoader has already shown a beforeunload confirmation panel for the current navigation attempt, // this frame is not allowed to cause another one to be shown. if (frameLoaderBeingNavigated->m_currentNavigationHasShownBeforeUnloadConfirmPanel) { document->addConsoleMessage(MessageSource::JS, MessageLevel::Error, ASCIILiteral("Blocked attempt to show multiple beforeunload confirmation dialogs for the same navigation.")); return true; } // We should only display the beforeunload dialog for an iframe if its SecurityOrigin matches all // ancestor frame SecurityOrigins up through the navigating FrameLoader. if (frameLoaderBeingNavigated != this) { Frame* parentFrame = m_frame.tree().parent(); while (parentFrame) { Document* parentDocument = parentFrame->document(); if (!parentDocument) return true; if (!m_frame.document() || !m_frame.document()->securityOrigin()->canAccess(parentDocument->securityOrigin())) { document->addConsoleMessage(MessageSource::JS, MessageLevel::Error, ASCIILiteral("Blocked attempt to show beforeunload confirmation dialog on behalf of a frame with different security origin. Protocols, domains, and ports must match.")); return true; } if (&parentFrame->loader() == frameLoaderBeingNavigated) break; parentFrame = parentFrame->tree().parent(); } // The navigatingFrameLoader should always be in our ancestory. ASSERT(parentFrame); ASSERT(&parentFrame->loader() == frameLoaderBeingNavigated); } frameLoaderBeingNavigated->m_currentNavigationHasShownBeforeUnloadConfirmPanel = true; String text = document->displayStringModifiedByEncoding(beforeUnloadEvent->returnValue()); return chrome.runBeforeUnloadConfirmPanel(text, &m_frame); } void FrameLoader::continueLoadAfterNavigationPolicy(const ResourceRequest& request, PassRefPtr formState, bool shouldContinue, AllowNavigationToInvalidURL allowNavigationToInvalidURL) { // If we loaded an alternate page to replace an unreachableURL, we'll get in here with a // nil policyDataSource because loading the alternate page will have passed // through this method already, nested; otherwise, policyDataSource should still be set. ASSERT(m_policyDocumentLoader || !m_provisionalDocumentLoader->unreachableURL().isEmpty()); bool isTargetItem = history().provisionalItem() ? history().provisionalItem()->isTargetItem() : false; bool urlIsDisallowed = allowNavigationToInvalidURL == AllowNavigationToInvalidURL::No && !request.url().isValid(); // Three reasons we can't continue: // 1) Navigation policy delegate said we can't so request is nil. A primary case of this // is the user responding Cancel to the form repost nag sheet. // 2) User responded Cancel to an alert popped up by the before unload event handler. // 3) The request's URL is invalid and navigation to invalid URLs is disallowed. bool canContinue = shouldContinue && shouldClose() && !urlIsDisallowed; if (!canContinue) { // If we were waiting for a quick redirect, but the policy delegate decided to ignore it, then we // need to report that the client redirect was cancelled. // FIXME: The client should be told about ignored non-quick redirects, too. if (m_quickRedirectComing) clientRedirectCancelledOrFinished(false); setPolicyDocumentLoader(nullptr); // If the navigation request came from the back/forward menu, and we punt on it, we have the // problem that we have optimistically moved the b/f cursor already, so move it back. For sanity, // we only do this when punting a navigation for the target frame or top-level frame. if ((isTargetItem || m_frame.isMainFrame()) && isBackForwardLoadType(policyChecker().loadType())) { if (Page* page = m_frame.page()) { if (HistoryItem* resetItem = m_frame.mainFrame().loader().history().currentItem()) { page->backForward().setCurrentItem(resetItem); m_frame.loader().client().updateGlobalHistoryItemForPage(); } } } return; } FrameLoadType type = policyChecker().loadType(); // A new navigation is in progress, so don't clear the history's provisional item. stopAllLoaders(ShouldNotClearProvisionalItem); // - In certain circumstances on pages with multiple frames, stopAllLoaders() // might detach the current FrameLoader, in which case we should bail on this newly defunct load. if (!m_frame.page()) return; setProvisionalDocumentLoader(m_policyDocumentLoader.get()); m_loadType = type; setState(FrameStateProvisional); setPolicyDocumentLoader(nullptr); if (isBackForwardLoadType(type)) { auto& diagnosticLoggingClient = m_frame.mainFrame().diagnosticLoggingClient(); if (history().provisionalItem()->isInPageCache()) { diagnosticLoggingClient.logDiagnosticMessageWithResult(DiagnosticLoggingKeys::pageCacheKey(), DiagnosticLoggingKeys::retrievalKey(), DiagnosticLoggingResultPass, ShouldSample::Yes); loadProvisionalItemFromCachedPage(); return; } diagnosticLoggingClient.logDiagnosticMessageWithResult(DiagnosticLoggingKeys::pageCacheKey(), DiagnosticLoggingKeys::retrievalKey(), DiagnosticLoggingResultFail, ShouldSample::Yes); } if (!formState) { continueLoadAfterWillSubmitForm(); return; } m_client.dispatchWillSubmitForm(formState, [this](PolicyAction action) { policyChecker().continueLoadAfterWillSubmitForm(action); }); } void FrameLoader::continueLoadAfterNewWindowPolicy(const ResourceRequest& request, PassRefPtr formState, const String& frameName, const NavigationAction& action, bool shouldContinue, AllowNavigationToInvalidURL allowNavigationToInvalidURL, NewFrameOpenerPolicy openerPolicy) { if (!shouldContinue) return; Ref frame(m_frame); RefPtr mainFrame = m_client.dispatchCreatePage(action); if (!mainFrame) return; mainFrame->loader().forceSandboxFlags(frame->loader().effectiveSandboxFlags()); if (frameName != "_blank") mainFrame->tree().setName(frameName); mainFrame->page()->setOpenedByDOM(); mainFrame->loader().m_client.dispatchShow(); if (openerPolicy == NewFrameOpenerPolicy::Allow) { mainFrame->loader().setOpener(frame.ptr()); mainFrame->document()->setReferrerPolicy(frame->document()->referrerPolicy()); } NavigationAction newAction(request, action.shouldOpenExternalURLsPolicy()); mainFrame->loader().loadWithNavigationAction(request, newAction, LockHistory::No, FrameLoadType::Standard, formState, allowNavigationToInvalidURL); } void FrameLoader::requestFromDelegate(ResourceRequest& request, unsigned long& identifier, ResourceError& error) { ASSERT(!request.isNull()); identifier = 0; if (Page* page = m_frame.page()) { identifier = page->progress().createUniqueIdentifier(); notifier().assignIdentifierToInitialRequest(identifier, m_documentLoader.get(), request); } ResourceRequest newRequest(request); notifier().dispatchWillSendRequest(m_documentLoader.get(), identifier, newRequest, ResourceResponse()); if (newRequest.isNull()) error = cancelledError(request); else error = ResourceError(); request = newRequest; } void FrameLoader::loadedResourceFromMemoryCache(CachedResource* resource, ResourceRequest& newRequest) { Page* page = m_frame.page(); if (!page) return; if (!resource->shouldSendResourceLoadCallbacks() || m_documentLoader->haveToldClientAboutLoad(resource->url())) return; // Main resource delegate messages are synthesized in MainResourceLoader, so we must not send them here. if (resource->type() == CachedResource::MainResource) return; if (!page->areMemoryCacheClientCallsEnabled()) { InspectorInstrumentation::didLoadResourceFromMemoryCache(*page, m_documentLoader.get(), resource); m_documentLoader->recordMemoryCacheLoadForFutureClientNotification(resource->resourceRequest()); m_documentLoader->didTellClientAboutLoad(resource->url()); return; } if (m_client.dispatchDidLoadResourceFromMemoryCache(m_documentLoader.get(), newRequest, resource->response(), resource->encodedSize())) { InspectorInstrumentation::didLoadResourceFromMemoryCache(*page, m_documentLoader.get(), resource); m_documentLoader->didTellClientAboutLoad(resource->url()); return; } unsigned long identifier; ResourceError error; requestFromDelegate(newRequest, identifier, error); InspectorInstrumentation::markResourceAsCached(*page, identifier); notifier().sendRemainingDelegateMessages(m_documentLoader.get(), identifier, newRequest, resource->response(), 0, resource->encodedSize(), 0, error); } void FrameLoader::applyUserAgent(ResourceRequest& request) { String userAgent = this->userAgent(request.url()); ASSERT(!userAgent.isNull()); request.setHTTPUserAgent(userAgent); } bool FrameLoader::shouldInterruptLoadForXFrameOptions(const String& content, const URL& url, unsigned long requestIdentifier) { Frame& topFrame = m_frame.tree().top(); if (&m_frame == &topFrame) return false; XFrameOptionsDisposition disposition = parseXFrameOptionsHeader(content); switch (disposition) { case XFrameOptionsSameOrigin: { RefPtr origin = SecurityOrigin::create(url); if (!origin->isSameSchemeHostPort(topFrame.document()->securityOrigin())) return true; for (Frame* frame = m_frame.tree().parent(); frame; frame = frame->tree().parent()) { if (!origin->isSameSchemeHostPort(frame->document()->securityOrigin())) break; } return false; } case XFrameOptionsDeny: return true; case XFrameOptionsAllowAll: return false; case XFrameOptionsConflict: m_frame.document()->addConsoleMessage(MessageSource::JS, MessageLevel::Error, "Multiple 'X-Frame-Options' headers with conflicting values ('" + content + "') encountered when loading '" + url.stringCenterEllipsizedToLength() + "'. Falling back to 'DENY'.", requestIdentifier); return true; case XFrameOptionsInvalid: m_frame.document()->addConsoleMessage(MessageSource::JS, MessageLevel::Error, "Invalid 'X-Frame-Options' header encountered when loading '" + url.stringCenterEllipsizedToLength() + "': '" + content + "' is not a recognized directive. The header will be ignored.", requestIdentifier); return false; case XFrameOptionsNone: return false; } ASSERT_NOT_REACHED(); return false; } void FrameLoader::loadProvisionalItemFromCachedPage() { DocumentLoader* provisionalLoader = provisionalDocumentLoader(); LOG(PageCache, "WebCorePageCache: Loading provisional DocumentLoader %p with URL '%s' from CachedPage", provisionalDocumentLoader(), provisionalDocumentLoader()->url().stringCenterEllipsizedToLength().utf8().data()); prepareForLoadStart(); m_loadingFromCachedPage = true; // Should have timing data from previous time(s) the page was shown. ASSERT(provisionalLoader->timing().navigationStart()); provisionalLoader->resetTiming(); provisionalLoader->timing().markNavigationStart(); provisionalLoader->setCommitted(true); commitProvisionalLoad(); } bool FrameLoader::shouldTreatURLAsSameAsCurrent(const URL& url) const { if (!history().currentItem()) return false; return url == history().currentItem()->url() || url == history().currentItem()->originalURL(); } bool FrameLoader::shouldTreatURLAsSrcdocDocument(const URL& url) const { if (!equalLettersIgnoringASCIICase(url.string(), "about:srcdoc")) return false; HTMLFrameOwnerElement* ownerElement = m_frame.ownerElement(); if (!ownerElement) return false; if (!ownerElement->hasTagName(iframeTag)) return false; return ownerElement->fastHasAttribute(srcdocAttr); } Frame* FrameLoader::findFrameForNavigation(const AtomicString& name, Document* activeDocument) { Frame* frame = m_frame.tree().find(name); // FIXME: Eventually all callers should supply the actual activeDocument so we can call canNavigate with the right document. if (!activeDocument) activeDocument = m_frame.document(); if (!activeDocument->canNavigate(frame)) return nullptr; return frame; } void FrameLoader::loadSameDocumentItem(HistoryItem& item) { ASSERT(item.documentSequenceNumber() == history().currentItem()->documentSequenceNumber()); Ref protect(m_frame); // Save user view state to the current history item here since we don't do a normal load. // FIXME: Does form state need to be saved here too? history().saveScrollPositionAndViewStateToItem(history().currentItem()); if (FrameView* view = m_frame.view()) view->setWasScrolledByUser(false); history().setCurrentItem(&item); // loadInSameDocument() actually changes the URL and notifies load delegates of a "fake" load loadInSameDocument(item.url(), item.stateObject(), false); // Restore user view state from the current history item here since we don't do a normal load. history().restoreScrollPositionAndViewState(); } // FIXME: This function should really be split into a couple pieces, some of // which should be methods of HistoryController and some of which should be // methods of FrameLoader. void FrameLoader::loadDifferentDocumentItem(HistoryItem& item, FrameLoadType loadType, FormSubmissionCacheLoadPolicy cacheLoadPolicy) { // Remember this item so we can traverse any child items as child frames load history().setProvisionalItem(&item); if (CachedPage* cachedPage = PageCache::singleton().get(item, m_frame.page())) { auto documentLoader = cachedPage->documentLoader(); m_client.updateCachedDocumentLoader(*documentLoader); documentLoader->setTriggeringAction(NavigationAction(documentLoader->request(), loadType, false)); documentLoader->setLastCheckedRequest(ResourceRequest()); loadWithDocumentLoader(documentLoader, loadType, 0, AllowNavigationToInvalidURL::Yes); return; } URL itemURL = item.url(); URL itemOriginalURL = item.originalURL(); URL currentURL; if (documentLoader()) currentURL = documentLoader()->url(); RefPtr formData = item.formData(); ResourceRequest request(itemURL); if (!item.referrer().isNull()) request.setHTTPReferrer(item.referrer()); ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy = shouldOpenExternalURLsPolicyToApply(m_frame, item.shouldOpenExternalURLsPolicy()); bool isFormSubmission = false; Event* event = nullptr; // If this was a repost that failed the page cache, we might try to repost the form. NavigationAction action; if (formData) { formData->generateFiles(m_frame.document()); request.setHTTPMethod("POST"); request.setHTTPBody(WTFMove(formData)); request.setHTTPContentType(item.formContentType()); RefPtr securityOrigin = SecurityOrigin::createFromString(item.referrer()); addHTTPOriginIfNeeded(request, securityOrigin->toString()); // Make sure to add extra fields to the request after the Origin header is added for the FormData case. // See https://bugs.webkit.org/show_bug.cgi?id=22194 for more discussion. addExtraFieldsToRequest(request, loadType, true); // FIXME: Slight hack to test if the NSURL cache contains the page we're going to. // We want to know this before talking to the policy delegate, since it affects whether // we show the DoYouReallyWantToRepost nag. // // This trick has a small bug (3123893) where we might find a cache hit, but then // have the item vanish when we try to use it in the ensuing nav. This should be // extremely rare, but in that case the user will get an error on the navigation. if (cacheLoadPolicy == MayAttemptCacheOnlyLoadForFormSubmissionItem) { request.setCachePolicy(ReturnCacheDataDontLoad); action = NavigationAction(request, loadType, isFormSubmission, event, shouldOpenExternalURLsPolicy); } else { request.setCachePolicy(ReturnCacheDataElseLoad); action = NavigationAction(request, NavigationType::FormResubmitted, event, shouldOpenExternalURLsPolicy); } } else { switch (loadType) { case FrameLoadType::Reload: case FrameLoadType::ReloadFromOrigin: request.setCachePolicy(ReloadIgnoringCacheData); break; case FrameLoadType::Back: case FrameLoadType::Forward: case FrameLoadType::IndexedBackForward: { #if PLATFORM(IOS) bool allowStaleData = true; #else bool allowStaleData = !item.wasRestoredFromSession(); #endif if (allowStaleData) request.setCachePolicy(ReturnCacheDataElseLoad); item.setWasRestoredFromSession(false); break; } case FrameLoadType::Standard: case FrameLoadType::RedirectWithLockedBackForwardList: break; case FrameLoadType::Same: default: ASSERT_NOT_REACHED(); } addExtraFieldsToRequest(request, loadType, true); ResourceRequest requestForOriginalURL(request); requestForOriginalURL.setURL(itemOriginalURL); action = NavigationAction(requestForOriginalURL, loadType, isFormSubmission, event, shouldOpenExternalURLsPolicy); } loadWithNavigationAction(request, action, LockHistory::No, loadType, 0, AllowNavigationToInvalidURL::Yes); } // Loads content into this frame, as specified by history item void FrameLoader::loadItem(HistoryItem& item, FrameLoadType loadType) { m_requestedHistoryItem = &item; HistoryItem* currentItem = history().currentItem(); bool sameDocumentNavigation = currentItem && item.shouldDoSameDocumentNavigationTo(*currentItem); if (sameDocumentNavigation) loadSameDocumentItem(item); else loadDifferentDocumentItem(item, loadType, MayAttemptCacheOnlyLoadForFormSubmissionItem); } void FrameLoader::retryAfterFailedCacheOnlyMainResourceLoad() { ASSERT(m_state == FrameStateProvisional); ASSERT(!m_loadingFromCachedPage); ASSERT(history().provisionalItem()); ASSERT(history().provisionalItem()->formData()); ASSERT(history().provisionalItem() == m_requestedHistoryItem.get()); FrameLoadType loadType = m_loadType; HistoryItem& item = *history().provisionalItem(); stopAllLoaders(ShouldNotClearProvisionalItem); loadDifferentDocumentItem(item, loadType, MayNotAttemptCacheOnlyLoadForFormSubmissionItem); } ResourceError FrameLoader::cancelledError(const ResourceRequest& request) const { ResourceError error = m_client.cancelledError(request); error.setIsCancellation(true); return error; } ResourceError FrameLoader::blockedByContentBlockerError(const ResourceRequest& request) const { return m_client.blockedByContentBlockerError(request); } ResourceError FrameLoader::blockedError(const ResourceRequest& request) const { ResourceError error = m_client.blockedError(request); error.setIsCancellation(true); return error; } #if PLATFORM(IOS) RetainPtr FrameLoader::connectionProperties(ResourceLoader* loader) { return m_client.connectionProperties(loader->documentLoader(), loader->identifier()); } #endif String FrameLoader::referrer() const { return m_documentLoader ? m_documentLoader->request().httpReferrer() : ""; } void FrameLoader::dispatchDidClearWindowObjectsInAllWorlds() { if (!m_frame.script().canExecuteScripts(NotAboutToExecuteScript)) return; Vector> worlds; ScriptController::getAllWorlds(worlds); for (auto& world : worlds) dispatchDidClearWindowObjectInWorld(world); } void FrameLoader::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld& world) { if (!m_frame.script().canExecuteScripts(NotAboutToExecuteScript) || !m_frame.script().existingWindowShell(world)) return; m_client.dispatchDidClearWindowObjectInWorld(world); if (Page* page = m_frame.page()) page->inspectorController().didClearWindowObjectInWorld(m_frame, world); InspectorInstrumentation::didClearWindowObjectInWorld(m_frame, world); } void FrameLoader::dispatchGlobalObjectAvailableInAllWorlds() { Vector> worlds; ScriptController::getAllWorlds(worlds); for (auto& world : worlds) m_client.dispatchGlobalObjectAvailable(world); } SandboxFlags FrameLoader::effectiveSandboxFlags() const { SandboxFlags flags = m_forcedSandboxFlags; if (Frame* parentFrame = m_frame.tree().parent()) flags |= parentFrame->document()->sandboxFlags(); if (HTMLFrameOwnerElement* ownerElement = m_frame.ownerElement()) flags |= ownerElement->sandboxFlags(); return flags; } void FrameLoader::didChangeTitle(DocumentLoader* loader) { m_client.didChangeTitle(loader); if (loader == m_documentLoader) { // Must update the entries in the back-forward list too. history().setCurrentItemTitle(loader->title()); // This must go through the WebFrame because it has the right notion of the current b/f item. m_client.setTitle(loader->title(), loader->urlForHistory()); m_client.setMainFrameDocumentReady(true); // update observers with new DOMDocument m_client.dispatchDidReceiveTitle(loader->title()); } #if ENABLE(REMOTE_INSPECTOR) if (m_frame.isMainFrame()) m_frame.page()->remoteInspectorInformationDidChange(); #endif } void FrameLoader::dispatchDidCommitLoad() { if (m_stateMachine.creatingInitialEmptyDocument()) return; m_client.dispatchDidCommitLoad(); if (m_frame.isMainFrame()) { m_frame.page()->resetSeenPlugins(); m_frame.page()->resetSeenMediaEngines(); } InspectorInstrumentation::didCommitLoad(m_frame, m_documentLoader.get()); #if ENABLE(REMOTE_INSPECTOR) if (m_frame.isMainFrame()) m_frame.page()->remoteInspectorInformationDidChange(); #endif } void FrameLoader::tellClientAboutPastMemoryCacheLoads() { ASSERT(m_frame.page()); ASSERT(m_frame.page()->areMemoryCacheClientCallsEnabled()); if (!m_documentLoader) return; Vector pastLoads; m_documentLoader->takeMemoryCacheLoadsForClientNotification(pastLoads); for (auto& pastLoad : pastLoads) { CachedResource* resource = MemoryCache::singleton().resourceForRequest(pastLoad, m_frame.page()->sessionID()); // FIXME: These loads, loaded from cache, but now gone from the cache by the time // Page::setMemoryCacheClientCallsEnabled(true) is called, will not be seen by the client. // Consider if there's some efficient way of remembering enough to deliver this client call. // We have the URL, but not the rest of the response or the length. if (!resource) continue; ResourceRequest request(resource->url()); m_client.dispatchDidLoadResourceFromMemoryCache(m_documentLoader.get(), request, resource->response(), resource->encodedSize()); } } NetworkingContext* FrameLoader::networkingContext() const { return m_networkingContext.get(); } void FrameLoader::loadProgressingStatusChanged() { if (auto* view = m_frame.mainFrame().view()) view->loadProgressingStatusChanged(); } void FrameLoader::forcePageTransitionIfNeeded() { m_client.forcePageTransitionIfNeeded(); } void FrameLoader::clearTestingOverrides() { m_overrideCachePolicyForTesting = Nullopt; m_overrideResourceLoadPriorityForTesting = Nullopt; m_isStrictRawResourceValidationPolicyDisabledForTesting = false; } void FrameLoader::applyShouldOpenExternalURLsPolicyToNewDocumentLoader(DocumentLoader& documentLoader, ShouldOpenExternalURLsPolicy propagatedPolicy) { documentLoader.setShouldOpenExternalURLsPolicy(shouldOpenExternalURLsPolicyToApply(m_frame, propagatedPolicy)); } bool FrameLoaderClient::hasHTMLView() const { return true; } RefPtr createWindow(Frame& openerFrame, Frame& lookupFrame, const FrameLoadRequest& request, const WindowFeatures& features, bool& created) { ASSERT(!features.dialog || request.frameName().isEmpty()); created = false; if (!request.frameName().isEmpty() && request.frameName() != "_blank") { if (RefPtr frame = lookupFrame.loader().findFrameForNavigation(request.frameName(), openerFrame.document())) { if (request.frameName() != "_self") { if (Page* page = frame->page()) page->chrome().focus(); } return frame; } } // Sandboxed frames cannot open new auxiliary browsing contexts. if (isDocumentSandboxed(openerFrame, SandboxPopups)) { // FIXME: This message should be moved off the console once a solution to https://bugs.webkit.org/show_bug.cgi?id=103274 exists. openerFrame.document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Blocked opening '" + request.resourceRequest().url().stringCenterEllipsizedToLength() + "' in a new window because the request was made in a sandboxed frame whose 'allow-popups' permission is not set."); return nullptr; } // FIXME: Setting the referrer should be the caller's responsibility. FrameLoadRequest requestWithReferrer = request; String referrer = SecurityPolicy::generateReferrerHeader(openerFrame.document()->referrerPolicy(), request.resourceRequest().url(), openerFrame.loader().outgoingReferrer()); if (!referrer.isEmpty()) requestWithReferrer.resourceRequest().setHTTPReferrer(referrer); FrameLoader::addHTTPOriginIfNeeded(requestWithReferrer.resourceRequest(), openerFrame.loader().outgoingOrigin()); Page* oldPage = openerFrame.page(); if (!oldPage) return nullptr; ShouldOpenExternalURLsPolicy shouldOpenExternalURLsPolicy = shouldOpenExternalURLsPolicyToApply(openerFrame, request.shouldOpenExternalURLsPolicy()); Page* page = oldPage->chrome().createWindow(&openerFrame, requestWithReferrer, features, NavigationAction(requestWithReferrer.resourceRequest(), shouldOpenExternalURLsPolicy)); if (!page) return nullptr; RefPtr frame = &page->mainFrame(); frame->loader().forceSandboxFlags(openerFrame.document()->sandboxFlags()); if (request.frameName() != "_blank") frame->tree().setName(request.frameName()); page->chrome().setToolbarsVisible(features.toolBarVisible || features.locationBarVisible); if (!frame->page()) return nullptr; page->chrome().setStatusbarVisible(features.statusBarVisible); if (!frame->page()) return nullptr; page->chrome().setScrollbarsVisible(features.scrollbarsVisible); if (!frame->page()) return nullptr; page->chrome().setMenubarVisible(features.menuBarVisible); if (!frame->page()) return nullptr; page->chrome().setResizable(features.resizable); // 'x' and 'y' specify the location of the window, while 'width' and 'height' // specify the size of the viewport. We can only resize the window, so adjust // for the difference between the window size and the viewport size. // FIXME: We should reconcile the initialization of viewport arguments between iOS and non-IOS. #if !PLATFORM(IOS) FloatSize viewportSize = page->chrome().pageRect().size(); FloatRect windowRect = page->chrome().windowRect(); if (features.x) windowRect.setX(*features.x); if (features.y) windowRect.setY(*features.y); // Zero width and height mean using default size, not minumum one. if (features.width && *features.width) windowRect.setWidth(*features.width + (windowRect.width() - viewportSize.width())); if (features.height && *features.height) windowRect.setHeight(*features.height + (windowRect.height() - viewportSize.height())); // Ensure non-NaN values, minimum size as well as being within valid screen area. FloatRect newWindowRect = DOMWindow::adjustWindowRect(page, windowRect); if (!frame->page()) return nullptr; page->chrome().setWindowRect(newWindowRect); #else // On iOS, width and height refer to the viewport dimensions. ViewportArguments arguments; // Zero width and height mean using default size, not minimum one. if (features.width && *features.width) arguments.width = *features.width; if (features.height && *features.height) arguments.height = *features.height; frame->setViewportArguments(arguments); #endif if (!frame->page()) return nullptr; page->chrome().show(); created = true; return frame; } } // namespace WebCore