blob: b423eb200a72e935ef1cf686e42af5523dcd1a3a [file] [log] [blame]
/*
* 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 <alp@atoker.com>
* Copyright (C) Research In Motion Limited 2009. All rights reserved.
* Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, 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 "Console.h"
#include "ContentSecurityPolicy.h"
#include "DOMImplementation.h"
#include "DOMWindow.h"
#include "DatabaseManager.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 "Frame.h"
#include "FrameLoadRequest.h"
#include "FrameLoaderClient.h"
#include "FrameNetworkingContext.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "HTMLAnchorElement.h"
#include "HTMLFormElement.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "HTMLParserIdioms.h"
#include "HTTPParsers.h"
#include "HistoryController.h"
#include "HistoryItem.h"
#include "IconController.h"
#include "InspectorController.h"
#include "InspectorInstrumentation.h"
#include "LoaderStrategy.h"
#include "Logging.h"
#include "MIMETypeRegistry.h"
#include "MemoryCache.h"
#include "Page.h"
#include "PageCache.h"
#include "PageTransitionEvent.h"
#include "PlatformStrategies.h"
#include "PluginData.h"
#include "PluginDatabase.h"
#include "PluginDocument.h"
#include "PolicyChecker.h"
#include "ProgressTracker.h"
#include "ResourceHandle.h"
#include "ResourceRequest.h"
#include "SchemeRegistry.h"
#include "ScriptCallStack.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 "TextResourceDecoder.h"
#include "WindowFeatures.h"
#include "XMLDocumentParser.h"
#include <wtf/CurrentTime.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
#if ENABLE(SHARED_WORKERS)
#include "SharedWorkerRepository.h"
#endif
#if ENABLE(SVG)
#include "SVGDocument.h"
#include "SVGLocatable.h"
#include "SVGNames.h"
#include "SVGPreserveAspectRatio.h"
#include "SVGSVGElement.h"
#include "SVGViewElement.h"
#include "SVGViewSpec.h"
#endif
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
#include "Archive.h"
#endif
namespace WebCore {
using namespace HTMLNames;
#if ENABLE(SVG)
using namespace SVGNames;
#endif
static const char defaultAcceptHeader[] = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
static double storedTimeOfLastCompletedLoad;
bool isBackForwardLoadType(FrameLoadType type)
{
switch (type) {
case FrameLoadTypeStandard:
case FrameLoadTypeReload:
case FrameLoadTypeReloadFromOrigin:
case FrameLoadTypeSame:
case FrameLoadTypeRedirectWithLockedBackForwardList:
case FrameLoadTypeReplace:
return false;
case FrameLoadTypeBack:
case FrameLoadTypeForward:
case FrameLoadTypeIndexedBackForward:
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);
}
class FrameLoader::FrameProgressTracker {
public:
static PassOwnPtr<FrameProgressTracker> create(Frame* frame) { return adoptPtr(new FrameProgressTracker(frame)); }
~FrameProgressTracker()
{
ASSERT(!m_inProgress || m_frame->page());
if (m_inProgress)
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:
FrameProgressTracker(Frame* frame)
: m_frame(frame)
, m_inProgress(false)
{
}
Frame* m_frame;
bool m_inProgress;
};
FrameLoader::FrameLoader(Frame* frame, FrameLoaderClient* client)
: m_frame(frame)
, m_client(client)
, m_policyChecker(adoptPtr(new PolicyChecker(frame)))
, m_history(adoptPtr(new HistoryController(frame)))
, m_notifer(frame)
, m_subframeLoader(frame)
, m_icon(adoptPtr(new IconController(frame)))
, m_mixedContentChecker(frame)
, m_state(FrameStateProvisional)
, m_loadType(FrameLoadTypeStandard)
, m_delegateIsHandlingProvisionalLoadError(false)
, m_quickRedirectComing(false)
, m_sentRedirectNotification(false)
, m_inStopAllLoaders(false)
, m_isExecutingJavaScriptFormAction(false)
, m_didCallImplicitClose(true)
, m_wasUnloadEventEmitted(false)
, m_pageDismissalEventBeingDispatched(NoDismissal)
, m_isComplete(false)
, m_needsClear(false)
, m_checkTimer(this, &FrameLoader::checkTimerFired)
, m_shouldCallCheckCompleted(false)
, m_shouldCallCheckLoadComplete(false)
, m_opener(0)
, m_didPerformFirstNavigation(false)
, m_loadingFromCachedPage(false)
, m_suppressOpenerInNewFrame(false)
, m_forcedSandboxFlags(SandboxNone)
{
}
FrameLoader::~FrameLoader()
{
setOpener(0);
HashSet<Frame*>::iterator end = m_openedFrames.end();
for (HashSet<Frame*>::iterator it = m_openedFrames.begin(); it != end; ++it)
(*it)->loader()->m_opener = 0;
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(KURL(ParsedURLString, emptyString())), SubstituteData()).get());
setProvisionalDocumentLoader(m_policyDocumentLoader.get());
m_provisionalDocumentLoader->startLoadingMainResource();
m_frame->document()->cancelParsing();
m_stateMachine.advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocument);
m_networkingContext = m_client->createNetworkingContext();
m_progressTracker = FrameProgressTracker::create(m_frame);
}
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(SecurityOrigin* securityOrigin, const KURL& url, const String& referrer, bool lockHistory, bool lockBackForwardList, bool refresh)
{
urlSelected(FrameLoadRequest(securityOrigin, ResourceRequest(url, referrer, refresh ? ReloadIgnoringCacheData : UseProtocolCachePolicy), "_self"),
0, lockHistory, lockBackForwardList, MaybeSendReferrer, ReplaceDocumentIfJavaScriptURL);
}
void FrameLoader::urlSelected(const KURL& url, const String& passedTarget, PassRefPtr<Event> triggeringEvent, bool lockHistory, bool lockBackForwardList, ShouldSendReferrer shouldSendReferrer)
{
urlSelected(FrameLoadRequest(m_frame->document()->securityOrigin(), ResourceRequest(url), passedTarget),
triggeringEvent, lockHistory, lockBackForwardList, shouldSendReferrer, DoNotReplaceDocumentIfJavaScriptURL);
}
// The shouldReplaceDocumentIfJavaScriptURL parameter will go away when the FIXME to eliminate the
// corresponding parameter from ScriptController::executeIfJavaScriptURL() is addressed.
void FrameLoader::urlSelected(const FrameLoadRequest& passedRequest, PassRefPtr<Event> triggeringEvent, bool lockHistory, bool lockBackForwardList, ShouldSendReferrer shouldSendReferrer, ShouldReplaceDocumentIfJavaScriptURL shouldReplaceDocumentIfJavaScriptURL)
{
ASSERT(!m_suppressOpenerInNewFrame);
RefPtr<Frame> protect(m_frame);
FrameLoadRequest frameRequest(passedRequest);
if (m_frame->script()->executeIfJavaScriptURL(frameRequest.resourceRequest().url(), shouldReplaceDocumentIfJavaScriptURL))
return;
if (frameRequest.frameName().isEmpty())
frameRequest.setFrameName(m_frame->document()->baseTarget());
if (shouldSendReferrer == NeverSendReferrer)
m_suppressOpenerInNewFrame = true;
addHTTPOriginIfNeeded(frameRequest.resourceRequest(), outgoingOrigin());
loadFrameRequest(frameRequest, lockHistory, lockBackForwardList, triggeringEvent, 0, shouldSendReferrer);
m_suppressOpenerInNewFrame = false;
}
void FrameLoader::submitForm(PassRefPtr<FormSubmission> 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(SecurityMessageSource, ErrorMessageLevel, "Blocked form submission to '" + submission->action().elidedString() + "' 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(KURL(submission->action())))
return;
m_isExecutingJavaScriptFormAction = true;
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;
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 handle 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) {
if (m_frame->document()) {
if (m_didCallImplicitClose && !m_wasUnloadEventEmitted) {
Node* currentFocusedNode = m_frame->document()->focusedNode();
if (currentFocusedNode && currentFocusedNode->toInputElement())
currentFocusedNode->toInputElement()->endEditing();
if (m_pageDismissalEventBeingDispatched == NoDismissal) {
if (unloadEventPolicy == UnloadEventPolicyUnloadAndPageHide) {
m_pageDismissalEventBeingDispatched = PageHideDismissal;
m_frame->document()->domWindow()->dispatchEvent(PageTransitionEvent::create(eventNames().pagehideEvent, m_frame->document()->inPageCache()), m_frame->document());
}
if (!m_frame->document()->inPageCache()) {
RefPtr<Event> 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> documentLoader = m_provisionalDocumentLoader;
m_pageDismissalEventBeingDispatched = UnloadDismissal;
if (documentLoader && !documentLoader->timing()->unloadEventStart() && !documentLoader->timing()->unloadEventEnd()) {
DocumentLoadTiming* timing = documentLoader->timing();
ASSERT(timing->navigationStart());
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 = NoDismissal;
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() && !m_frame->document()->inPageCache()) {
// 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();
}
}
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);
#if ENABLE(SQL_DATABASE)
// FIXME: Should the DatabaseManager watch for something like ActiveDOMObject::stop() rather than being special-cased here?
DatabaseManager::manager().stopDatabases(doc, 0);
#endif
}
// 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().
RefPtr<Frame> protector(m_frame);
if (DocumentParser* parser = m_frame->document()->parser()) {
parser->stopParsing();
parser->finish();
}
icon()->stopLoader();
}
bool FrameLoader::closeURL()
{
history()->saveDocumentState();
// Should only send the pagehide event here if the current document exists and has not been placed in the page cache.
Document* currentDocument = m_frame->document();
stopLoading(currentDocument && !currentDocument->inPageCache() ? UnloadEventPolicyUnloadAndPageHide : UnloadEventPolicyUnloadOnly);
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();
if (m_frame->document()->attached()) {
m_frame->document()->prepareForDestruction();
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()->resetUnlessSuspendedForPageCache();
m_frame->script()->clearWindowShell(newDocument->domWindow(), m_frame->document()->inPageCache());
}
m_frame->selection()->prepareForDestruction();
m_frame->eventHandler()->clear();
if (clearFrameView && m_frame->view())
m_frame->view()->clear();
// Do not drop the document before the ScriptController and view are cleared
// as some destructors might still try to access the document.
m_frame->setDocument(0);
m_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;
if (m_frame->document()->isViewSource())
return;
double delay;
String url;
if (!parseHTTPRefresh(m_documentLoader->response().httpHeaderField("Refresh"), false, delay, url))
return;
if (url.isEmpty())
url = m_frame->document()->url().string();
else
url = m_frame->document()->completeURL(url).string();
m_frame->navigationScheduler()->scheduleRedirect(delay, url);
}
void FrameLoader::setOutgoingReferrer(const KURL& 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.clear();
}
if (dispatch)
dispatchDidClearWindowObjectsInAllWorlds();
updateFirstPartyForCookies();
m_frame->document()->initContentSecurityPolicy();
Settings* settings = m_frame->document()->settings();
if (settings) {
m_frame->document()->cachedResourceLoader()->setImagesEnabled(settings->areImagesEnabled());
m_frame->document()->cachedResourceLoader()->setAutoLoadImages(settings->loadsImagesAutomatically());
}
if (m_documentLoader) {
String dnsPrefetchControl = m_documentLoader->response().httpHeaderField("X-DNS-Prefetch-Control");
if (!dnsPrefetchControl.isEmpty())
m_frame->document()->parseDNSPrefetchControlHeader(dnsPrefetchControl);
String policyValue = m_documentLoader->response().httpHeaderField("Content-Security-Policy");
if (!policyValue.isEmpty())
m_frame->document()->contentSecurityPolicy()->didReceiveHeader(policyValue, ContentSecurityPolicy::Enforce);
policyValue = m_documentLoader->response().httpHeaderField("Content-Security-Policy-Report-Only");
if (!policyValue.isEmpty())
m_frame->document()->contentSecurityPolicy()->didReceiveHeader(policyValue, ContentSecurityPolicy::Report);
policyValue = m_documentLoader->response().httpHeaderField("X-WebKit-CSP");
if (!policyValue.isEmpty())
m_frame->document()->contentSecurityPolicy()->didReceiveHeader(policyValue, ContentSecurityPolicy::PrefixedEnforce);
policyValue = m_documentLoader->response().httpHeaderField("X-WebKit-CSP-Report-Only");
if (!policyValue.isEmpty())
m_frame->document()->contentSecurityPolicy()->didReceiveHeader(policyValue, ContentSecurityPolicy::PrefixedReport);
String headerContentLanguage = m_documentLoader->response().httpHeaderField("Content-Language");
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<Frame> protector = m_frame->view() ? m_frame : 0;
m_client->dispatchDidFinishDocumentLoad();
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();
scrollToFragmentWithParentBoundary(m_frame->document()->url());
}
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()
{
RefPtr<Frame> protect(m_frame);
m_shouldCallCheckCompleted = false;
if (m_frame->view())
m_frame->view()->handleLoadCompleted();
// 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;
// OK, completed.
m_isComplete = true;
m_requestedHistoryItem = 0;
m_frame->document()->setReadyState(Document::Complete);
checkCallImplicitClose(); // if we didn't do it before
m_frame->navigationScheduler()->startTimer();
completed();
if (m_frame->page())
checkLoadComplete();
if (m_frame->view())
m_frame->view()->handleLoadCompleted();
}
void FrameLoader::checkTimerFired(Timer<FrameLoader>*)
{
RefPtr<Frame> 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 KURL& url, const String& referer, Frame* childFrame)
{
ASSERT(childFrame);
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
RefPtr<Archive> 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()->loadDifferentDocumentItem(childItem, loadType(), MayAttemptCacheOnlyLoadForFormSubmissionItem);
return;
}
}
childFrame->loader()->loadURL(url, referer, "_self", false, FrameLoadTypeRedirectWithLockedBackForwardList, 0, 0);
}
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
void FrameLoader::loadArchive(PassRefPtr<Archive> archive)
{
ArchiveResource* mainResource = archive->mainResource();
ASSERT(mainResource);
if (!mainResource)
return;
SubstituteData substituteData(mainResource->data(), mainResource->mimeType(), mainResource->textEncoding(), KURL());
ResourceRequest request(mainResource->url());
#if PLATFORM(MAC)
request.applyWebArchiveHackForMail();
#endif
RefPtr<DocumentLoader> documentLoader = m_client->createDocumentLoader(request, substituteData);
documentLoader->setArchive(archive.get());
load(documentLoader.get());
}
#endif // ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
ObjectContentType FrameLoader::defaultObjectContentType(const KURL& url, const String& mimeTypeIn, bool shouldPreferPlugInsForImages)
{
String mimeType = mimeTypeIn;
if (mimeType.isEmpty())
mimeType = mimeTypeFromURL(url);
#if !PLATFORM(MAC) && !PLATFORM(EFL) // Mac has no PluginDatabase, nor does Chromium or EFL
if (mimeType.isEmpty()) {
String decodedPath = decodeURLEscapeSequences(url.path());
mimeType = PluginDatabase::installedPlugins()->MIMETypeForExtension(decodedPath.substring(decodedPath.reverseFind('.') + 1));
}
#endif
if (mimeType.isEmpty())
return ObjectContentFrame; // Go ahead and hope that we can display the content.
#if !PLATFORM(MAC) && !PLATFORM(EFL) // Mac has no PluginDatabase, nor does Chromium or EFL
bool plugInSupportsMIMEType = PluginDatabase::installedPlugins()->isMIMETypeRegistered(mimeType);
#else
bool plugInSupportsMIMEType = false;
#endif
if (MIMETypeRegistry::isSupportedImageMIMEType(mimeType))
return shouldPreferPlugInsForImages && plugInSupportsMIMEType ? WebCore::ObjectContentNetscapePlugin : WebCore::ObjectContentImage;
if (plugInSupportsMIMEType)
return WebCore::ObjectContentNetscapePlugin;
if (MIMETypeRegistry::isSupportedNonImageMIMEType(mimeType))
return WebCore::ObjectContentFrame;
return WebCore::ObjectContentNone;
}
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 KURL& 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 (!owner || !owner->hasTagName(objectTag))
return;
static_cast<HTMLObjectElement*>(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 = KURL();
}
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 KURL& 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 KURL& url, PassRefPtr<SerializedScriptValue> 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
KURL 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()
{
RefPtr<Frame> 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(0);
}
void FrameLoader::started()
{
for (Frame* frame = m_frame; frame; frame = frame->tree()->parent())
frame->loader()->m_isComplete = false;
}
void FrameLoader::prepareForHistoryNavigation()
{
// If there is no currentItem, but we still want to engage in
// history navigation we need to manufacture one, and update
// the state machine of this frame to impersonate having
// loaded it.
RefPtr<HistoryItem> currentItem = history()->currentItem();
if (!currentItem) {
currentItem = HistoryItem::create();
currentItem->setLastVisitWasFailure(true);
history()->setCurrentItem(currentItem.get());
frame()->page()->backForward()->setCurrentItem(currentItem.get());
ASSERT(stateMachine()->isDisplayingInitialEmptyDocument());
stateMachine()->advanceTo(FrameLoaderStateMachine::DisplayingInitialEmptyDocumentPostCommit);
stateMachine()->advanceTo(FrameLoaderStateMachine::CommittedFirstRealLoad);
}
}
void FrameLoader::prepareForLoadStart()
{
m_progressTracker->progressStarted();
m_client->dispatchDidStartProvisionalLoad();
// Notify accessibility.
if (AXObjectCache* cache = m_frame->document()->existingAXObjectCache()) {
AXObjectCache::AXLoadingEvent loadingEvent = loadType() == FrameLoadTypeReload ? 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 = 0;
detachChildren();
}
void FrameLoader::loadFrameRequest(const FrameLoadRequest& request, bool lockHistory, bool lockBackForwardList,
PassRefPtr<Event> event, PassRefPtr<FormState> formState, ShouldSendReferrer shouldSendReferrer)
{
// Protect frame from getting blown away inside dispatchBeforeLoadEvent in loadWithDocumentLoader.
RefPtr<Frame> protect(m_frame);
KURL url = request.resourceRequest().url();
ASSERT(m_frame->document());
if (!request.requester()->canDisplay(url)) {
reportLocalLoadFailed(m_frame, url.elidedString());
return;
}
String argsReferrer = request.resourceRequest().httpReferrer();
if (argsReferrer.isEmpty())
argsReferrer = outgoingReferrer();
String referrer = SecurityPolicy::generateReferrerHeader(m_frame->document()->referrerPolicy(), url, argsReferrer);
if (shouldSendReferrer == NeverSendReferrer)
referrer = String();
FrameLoadType loadType;
if (request.resourceRequest().cachePolicy() == ReloadIgnoringCacheData)
loadType = FrameLoadTypeReload;
else if (lockBackForwardList)
loadType = FrameLoadTypeRedirectWithLockedBackForwardList;
else
loadType = FrameLoadTypeStandard;
if (request.resourceRequest().httpMethod() == "POST")
loadPostRequest(request.resourceRequest(), referrer, request.frameName(), lockHistory, loadType, event, formState.get());
else
loadURL(request.resourceRequest().url(), referrer, request.frameName(), lockHistory, 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();
}
}
void FrameLoader::loadURL(const KURL& newURL, const String& referrer, const String& frameName, bool lockHistory, FrameLoadType newLoadType,
PassRefPtr<Event> event, PassRefPtr<FormState> prpFormState)
{
if (m_inStopAllLoaders)
return;
RefPtr<FormState> formState = prpFormState;
bool isFormSubmission = formState;
ResourceRequest request(newURL);
if (!referrer.isEmpty()) {
request.setHTTPReferrer(referrer);
RefPtr<SecurityOrigin> referrerOrigin = SecurityOrigin::createFromString(referrer);
addHTTPOriginIfNeeded(request, referrerOrigin->toString());
}
#if ENABLE(CACHE_PARTITIONING)
if (m_frame->tree()->top() != m_frame)
request.setCachePartition(m_frame->tree()->top()->document()->securityOrigin()->cachePartition());
#endif
addExtraFieldsToRequest(request, newLoadType, true);
if (newLoadType == FrameLoadTypeReload || newLoadType == FrameLoadTypeReloadFromOrigin)
request.setCachePolicy(ReloadIgnoringCacheData);
ASSERT(newLoadType != FrameLoadTypeSame);
// 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) {
targetFrame->loader()->loadURL(newURL, referrer, "_self", lockHistory, newLoadType, event, formState.release());
return;
}
if (m_pageDismissalEventBeingDispatched != NoDismissal)
return;
NavigationAction action(request, newLoadType, isFormSubmission, event);
if (!targetFrame && !frameName.isEmpty()) {
policyChecker()->checkNewWindowPolicy(action, FrameLoader::callContinueLoadAfterNewWindowPolicy,
request, formState.release(), frameName, this);
return;
}
RefPtr<DocumentLoader> 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);
policyChecker()->stopCheck();
policyChecker()->setLoadType(newLoadType);
policyChecker()->checkNavigationPolicy(request, oldDocumentLoader.get(), formState.release(),
callContinueFragmentScrollAfterNavigationPolicy, this);
} else {
// 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());
if (isRedirect) {
m_quickRedirectComing = false;
if (m_provisionalDocumentLoader)
m_provisionalDocumentLoader->setIsClientRedirect(true);
} else if (sameURL && newLoadType != FrameLoadTypeReload && newLoadType != FrameLoadTypeReloadFromOrigin)
// 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 = FrameLoadTypeSame;
}
}
SubstituteData FrameLoader::defaultSubstituteDataForURL(const KURL& url)
{
if (!shouldTreatURLAsSrcdocDocument(url))
return SubstituteData();
String srcdoc = m_frame->ownerElement()->fastGetAttribute(srcdocAttr);
ASSERT(!srcdoc.isNull());
CString encodedSrcdoc = srcdoc.utf8();
return SubstituteData(SharedBuffer::create(encodedSrcdoc.data(), encodedSrcdoc.length()), "text/html", "UTF-8", KURL());
}
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()) {
policyChecker()->checkNewWindowPolicy(NavigationAction(request.resourceRequest(), NavigationTypeOther), FrameLoader::callContinueLoadAfterNewWindowPolicy, request.resourceRequest(), 0, request.frameName(), this);
return;
}
if (!request.hasSubstituteData())
request.setSubstituteData(defaultSubstituteDataForURL(request.resourceRequest().url()));
RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request.resourceRequest(), request.substituteData());
if (request.lockHistory() && m_documentLoader)
loader->setClientRedirectSourceForHistory(m_documentLoader->didCreateGlobalHistoryEntry() ? m_documentLoader->urlForHistory().string() : m_documentLoader->clientRedirectSourceForHistory());
load(loader.get());
}
void FrameLoader::loadWithNavigationAction(const ResourceRequest& request, const NavigationAction& action, bool lockHistory, FrameLoadType type, PassRefPtr<FormState> formState)
{
RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, defaultSubstituteDataForURL(request.url()));
if (lockHistory && 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.get(), type, formState);
}
void FrameLoader::load(DocumentLoader* newDocumentLoader)
{
ResourceRequest& r = newDocumentLoader->request();
addExtraFieldsToMainResourceRequest(r);
FrameLoadType type;
if (shouldTreatURLAsSameAsCurrent(newDocumentLoader->originalRequest().url())) {
r.setCachePolicy(ReloadIgnoringCacheData);
type = FrameLoadTypeSame;
} else if (shouldTreatURLAsSameAsCurrent(newDocumentLoader->unreachableURL()) && m_loadType == FrameLoadTypeReload)
type = FrameLoadTypeReload;
else
type = FrameLoadTypeStandard;
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 "FrameLoadTypeReload" ...
// 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 == FrameLoadTypeStandard);
type = FrameLoadTypeReload;
}
loadWithDocumentLoader(newDocumentLoader, type, 0);
}
void FrameLoader::loadWithDocumentLoader(DocumentLoader* loader, FrameLoadType type, PassRefPtr<FormState> prpFormState)
{
// Retain because dispatchBeforeLoadEvent may release the last reference to it.
RefPtr<Frame> 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 != NoDismissal)
return;
if (m_frame->document())
m_previousURL = m_frame->document()->url();
policyChecker()->setLoadType(type);
RefPtr<FormState> formState = prpFormState;
bool isFormSubmission = formState;
const KURL& newURL = loader->request().url();
const String& httpMethod = loader->request().httpMethod();
if (shouldPerformFragmentNavigation(isFormSubmission, httpMethod, policyChecker()->loadType(), newURL)) {
RefPtr<DocumentLoader> oldDocumentLoader = m_documentLoader;
NavigationAction action(loader->request(), policyChecker()->loadType(), isFormSubmission);
oldDocumentLoader->setTriggeringAction(action);
policyChecker()->stopCheck();
policyChecker()->checkNavigationPolicy(loader->request(), oldDocumentLoader.get(), formState,
callContinueFragmentScrollAfterNavigationPolicy, this);
} else {
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);
return;
}
}
policyChecker()->checkNavigationPolicy(loader->request(), loader, formState,
callContinueLoadAfterNavigationPolicy, this);
}
}
void FrameLoader::reportLocalLoadFailed(Frame* frame, const String& url)
{
ASSERT(!url.isEmpty());
if (!frame)
return;
frame->document()->addConsoleMessage(SecurityMessageSource, ErrorMessageLevel, "Not allowed to load local resource: " + url);
}
const ResourceRequest& FrameLoader::initialRequest() const
{
return activeDocumentLoader()->originalRequest();
}
bool FrameLoader::willLoadMediaElementURL(KURL& url)
{
ResourceRequest request(url);
unsigned long identifier;
ResourceError error;
requestFromDelegate(request, identifier, error);
notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, request, ResourceResponse(url, String(), -1, String(), String()), 0, -1, -1, error);
url = request.url();
return error.isNull();
}
bool FrameLoader::shouldReloadToHandleUnreachableURL(DocumentLoader* docLoader)
{
KURL 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.
DocumentLoader* compareDocumentLoader = 0;
if (policyChecker()->delegateIsDecidingNavigationPolicy() || policyChecker()->delegateIsHandlingUnimplementablePolicy())
compareDocumentLoader = m_policyDocumentLoader.get();
else if (m_delegateIsHandlingProvisionalLoadError)
compareDocumentLoader = m_provisionalDocumentLoader.get();
return compareDocumentLoader && unreachableURL == compareDocumentLoader->request().url();
}
void FrameLoader::reloadWithOverrideEncoding(const String& encoding)
{
if (!m_documentLoader)
return;
ResourceRequest request = m_documentLoader->request();
KURL 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);
RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(request, defaultSubstituteDataForURL(request.url()));
setPolicyDocumentLoader(loader.get());
loader->setOverrideEncoding(encoding);
loadWithDocumentLoader(loader.get(), FrameLoadTypeReload, 0);
}
void FrameLoader::reloadWithOverrideURL(const KURL& overrideUrl, bool endToEndReload)
{
if (!m_documentLoader)
return;
if (overrideUrl.isEmpty())
return;
ResourceRequest request = m_documentLoader->request();
request.setURL(overrideUrl);
reloadWithRequest(request, endToEndReload);
}
void FrameLoader::reload(bool endToEndReload)
{
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();
KURL unreachableURL = m_documentLoader->unreachableURL();
if (!unreachableURL.isEmpty())
initialRequest.setURL(unreachableURL);
reloadWithRequest(initialRequest, endToEndReload);
}
void FrameLoader::reloadWithRequest(const ResourceRequest& initialRequest, bool endToEndReload)
{
ASSERT(m_documentLoader);
// 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.
RefPtr<DocumentLoader> loader = m_client->createDocumentLoader(initialRequest, defaultSubstituteDataForURL(initialRequest.url()));
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, NavigationTypeFormResubmitted));
loader->setOverrideEncoding(m_documentLoader->overrideEncoding());
loadWithDocumentLoader(loader.get(), endToEndReload ? FrameLoadTypeReloadFromOrigin : FrameLoadTypeReload, 0);
}
void FrameLoader::stopAllLoaders(ClearProvisionalItemPolicy clearProvisionalItemPolicy)
{
ASSERT(!m_frame->document() || !m_frame->document()->inPageCache());
if (m_pageDismissalEventBeingDispatched != NoDismissal)
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.
RefPtr<Frame> 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(0);
for (RefPtr<Frame> 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(0);
m_checkTimer.stop();
m_inStopAllLoaders = false;
}
void FrameLoader::stopForUserCancel(bool deferCheckLoadComplete)
{
stopAllLoaders();
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;
ASSERT(m_frame);
if (loader)
loader->setFrame(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;
}
double FrameLoader::timeOfLastCompletedLoad()
{
return storedTimeOfLastCompletedLoad;
}
void FrameLoader::setState(FrameState newState)
{
m_state = newState;
if (newState == FrameStateProvisional)
provisionalLoadStarted();
else if (newState == FrameStateComplete) {
frameLoadCompleted();
storedTimeOfLastCompletedLoad = currentTime();
if (m_documentLoader)
m_documentLoader->stopRecordingResponses();
}
}
void FrameLoader::clearProvisionalLoad()
{
setProvisionalDocumentLoader(0);
m_progressTracker->progressCompleted();
setState(FrameStateComplete);
}
void FrameLoader::commitProvisionalLoad()
{
RefPtr<CachedPage> cachedPage = m_loadingFromCachedPage ? pageCache()->get(history()->provisionalItem()) : 0;
RefPtr<DocumentLoader> pdl = m_provisionalDocumentLoader;
RefPtr<Frame> protect(m_frame);
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().elidedString().utf8().data() : "",
pdl ? pdl->url().elidedString().utf8().data() : "<no provisional DocumentLoader>");
// 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.
HistoryItem* item = history()->currentItem();
if (!m_frame->tree()->parent() && pageCache()->canCache(m_frame->page()) && !item->isInPageCache())
pageCache()->add(item, m_frame->page());
if (m_loadType != FrameLoadTypeReplace)
closeOldDataSources();
if (!cachedPage && !m_stateMachine.creatingInitialEmptyDocument())
m_client->makeRepresentation(pdl.get());
transitionToCommitted(cachedPage);
if (pdl && m_documentLoader) {
// Check if the destination page is allowed to access the previous page's timing information.
RefPtr<SecurityOrigin> securityOrigin = SecurityOrigin::create(pdl->request().url());
m_documentLoader->timing()->setHasSameOriginAsPreviousDocument(securityOrigin->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()) {
prepareForCachedPageRestore();
cachedPage->restore(m_frame->page());
// The page should be removed from the cache immediately after a restoration in order for the PageCache to be consistent.
pageCache()->remove(history()->currentItem());
dispatchDidCommitLoad();
// If we have a title let the WebView know about it.
StringWithDirection title = m_documentLoader->title();
if (!title.isNull())
m_client->dispatchDidReceiveTitle(title);
checkCompleted();
} else {
if (cachedPage)
pageCache()->remove(history()->currentItem());
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().elidedString().utf8().data() : "");
if (m_loadType == FrameLoadTypeStandard && m_documentLoader->isClientRedirect())
history()->updateForClientRedirect();
if (m_loadingFromCachedPage) {
m_frame->document()->documentDidResumeFromPageCache();
// Force a layout to update view size and thereby update scrollbars.
m_frame->view()->forceLayout();
const ResponseVector& responses = m_documentLoader->responses();
size_t count = responses.size();
for (size_t i = 0; i < count; i++) {
const ResourceResponse& response = 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<int>(response.expectedContentLength()), 0, error);
}
// FIXME: Why only this frame and not parent frames?
checkLoadCompleteForThisFrame();
}
}
void FrameLoader::transitionToCommitted(PassRefPtr<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(0);
if (pdl != m_documentLoader) {
ASSERT(m_state == FrameStateComplete);
return;
}
setState(FrameStateCommittedPage);
#if ENABLE(TOUCH_EVENTS)
if (isLoadingMainFrame())
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 FrameLoadTypeForward:
case FrameLoadTypeBack:
case FrameLoadTypeIndexedBackForward:
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 (<rdar://problem/8091103>).
if (!m_stateMachine.committedFirstRealDocumentLoad() && isLoadingMainFrame())
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->setFrame(m_frame);
m_client->transitionToCommittedFromCachedFrame(cachedPage->cachedMainFrame());
} else
m_client->transitionToCommittedForNewPage();
}
break;
case FrameLoadTypeReload:
case FrameLoadTypeReloadFromOrigin:
case FrameLoadTypeSame:
case FrameLoadTypeReplace:
history()->updateForReload();
m_client->transitionToCommittedForNewPage();
break;
case FrameLoadTypeStandard:
history()->updateForStandardLoad();
if (m_frame->view())
m_frame->view()->setScrollbarsSuppressed(true);
m_client->transitionToCommittedForNewPage();
break;
case FrameLoadTypeRedirectWithLockedBackForwardList:
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 KURL& url, double seconds, double fireDate, bool 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 || history()->currentItemShouldBeReplaced()) && m_documentLoader && !m_isExecutingJavaScriptFormAction;
}
bool FrameLoader::shouldReload(const KURL& currentURL, const KURL& 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->page()->mainFrame() == m_frame);
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;
KURL 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->setInPageCache(false);
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);
// Use the current ScrollView's frame rect.
if (m_frame->view())
view->setFrameRect(m_frame->view()->frameRect());
m_frame->setView(view);
m_frame->setDocument(document);
document->domWindow()->resumeFromPageCache();
updateFirstPartyForCookies();
cachedFrame.restore();
}
bool FrameLoader::isHostedByObjectElement() const
{
HTMLFrameOwnerElement* owner = m_frame->ownerElement();
return owner && owner->hasTagName(objectTag);
}
bool FrameLoader::isLoadingMainFrame() const
{
Page* page = m_frame->page();
return page && m_frame == page->mainFrame();
}
bool FrameLoader::isReplacing() const
{
return m_loadType == FrameLoadTypeReplace;
}
void FrameLoader::setReplacing()
{
m_loadType = FrameLoadTypeReplace;
}
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 == FrameLoadTypeReloadFromOrigin)
return CachePolicyReload;
if (Frame* parentFrame = m_frame->tree()->parent()) {
CachePolicy parentCachePolicy = parentFrame->loader()->subresourceCachePolicy();
if (parentCachePolicy != CachePolicyVerify)
return parentCachePolicy;
}
if (m_loadType == FrameLoadTypeReload)
return CachePolicyRevalidate;
const ResourceRequest& request(documentLoader()->request());
#if PLATFORM(MAC)
if (request.cachePolicy() == ReloadIgnoringCacheData && !equalIgnoringCase(request.httpMethod(), "post") && ResourceRequest::useQuickLookResourceCachingQuirks())
return CachePolicyRevalidate;
#endif
if (request.cachePolicy() == ReturnCacheDataElseLoad)
return CachePolicyHistoryBuffer;
return CachePolicyVerify;
}
void FrameLoader::checkLoadCompleteForThisFrame()
{
ASSERT(m_client->hasWebView());
Settings* settings = m_frame->settings();
switch (m_state) {
case FrameStateProvisional: {
if (m_delegateIsHandlingProvisionalLoadError)
return;
RefPtr<DocumentLoader> 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<HistoryItem> 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_delegateIsHandlingProvisionalLoadError = true;
m_client->dispatchDidFailProvisionalLoad(error);
m_delegateIsHandlingProvisionalLoadError = false;
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()) {
KURL 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 == FrameLoadTypeReload || m_loadType == FrameLoadTypeReloadFromOrigin)
history()->restoreScrollPositionAndViewState();
}
if (m_stateMachine.creatingInitialEmptyDocument() || !m_stateMachine.committedFirstRealDocumentLoad())
return;
if (!settings->needsDidFinishLoadOrderQuirk()) {
m_progressTracker->progressCompleted();
if (Page* page = m_frame->page()) {
if (m_frame == page->mainFrame())
page->resetRelevantPaintedObjectCounter();
}
}
const ResourceError& error = dl->mainDocumentError();
AXObjectCache::AXLoadingEvent loadingEvent;
if (!error.isNull()) {
m_client->dispatchDidFailLoad(error);
loadingEvent = AXObjectCache::AXLoadingFailed;
} else {
m_client->dispatchDidFinishLoad();
loadingEvent = AXObjectCache::AXLoadingFinished;
}
if (settings->needsDidFinishLoadOrderQuirk()) {
m_progressTracker->progressCompleted();
if (Page* page = m_frame->page()) {
if (m_frame == page->mainFrame())
page->resetRelevantPaintedObjectCounter();
}
}
// Notify accessibility.
if (AXObjectCache* cache = m_frame->document()->existingAXObjectCache())
cache->frameLoadingEventNotification(m_frame, loadingEvent);
return;
}
case FrameStateComplete:
m_loadType = FrameLoadTypeStandard;
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 KURL 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".
KURL 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 KURL();
}
void FrameLoader::setOriginalURLForDownloadRequest(ResourceRequest& request)
{
KURL originalURL;
// If there is no referrer, assume that the download was initiated directly, so current document is
// completely unrelated to it. See <rdar://problem/5294691>.
// 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(KURL(KURL(), hostOnlyURLString));
}
}
void FrameLoader::didLayout(LayoutMilestones milestones)
{
m_client->dispatchDidLayout(milestones);
}
void FrameLoader::didFirstLayout()
{
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()
{
typedef Vector<RefPtr<Frame> > FrameVector;
FrameVector childrenToDetach;
childrenToDetach.reserveCapacity(m_frame->tree()->childCount());
for (Frame* child = m_frame->tree()->lastChild(); child; child = child->tree()->previousSibling())
childrenToDetach.append(child);
FrameVector::iterator end = childrenToDetach.end();
for (FrameVector::iterator it = childrenToDetach.begin(); it != end; ++it)
(*it)->loader()->detachFromParent();
}
void FrameLoader::closeAndRemoveChild(Frame* child)
{
child->tree()->detachFromParent();
child->setView(0);
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;
// 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.
if (Page* page = m_frame->page()) {
Vector<RefPtr<Frame>, 10> frames;
for (RefPtr<Frame> frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext())
frames.append(frame);
// To process children before their parents, iterate the vector backwards.
for (size_t i = frames.size(); i; --i)
frames[i - 1]->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 KURL& url) const
{
String userAgent = m_client->userAgent(url);
InspectorInstrumentation::applyUserAgentOverride(m_frame, &userAgent);
return userAgent;
}
void FrameLoader::handledOnloadEvents()
{
m_client->dispatchDidHandleOnloadEvents();
if (documentLoader())
documentLoader()->handledOnloadEvents();
}
void FrameLoader::frameDetached()
{
stopAllLoaders();
m_frame->document()->stopActiveDOMObjects();
detachFromParent();
}
void FrameLoader::detachFromParent()
{
RefPtr<Frame> 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.clear();
if (Frame* parent = m_frame->tree()->parent()) {
parent->loader()->closeAndRemoveChild(m_frame);
parent->loader()->scheduleCheckCompleted();
} else {
m_frame->setView(0);
m_frame->willDetachPage();
m_frame->detachFromPage();
}
}
void FrameLoader::detachViewsAndDocumentLoader()
{
m_client->detachedFromParent2();
setDocumentLoader(0);
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 (<rdar://problem/6616664>).
if (request.firstPartyForCookies().isEmpty()) {
if (mainResource && isLoadingMainFrame())
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 == FrameLoadTypeReload || loadType == FrameLoadTypeReloadFromOrigin || request.isConditional())
request.setCachePolicy(ReloadIgnoringCacheData);
if (request.cachePolicy() == ReloadIgnoringCacheData) {
if (loadType == FrameLoadTypeReload)
request.setHTTPHeaderField("Cache-Control", "max-age=0");
else if (loadType == FrameLoadTypeReloadFromOrigin) {
request.setHTTPHeaderField("Cache-Control", "no-cache");
request.setHTTPHeaderField("Pragma", "no-cache");
}
}
if (mainResource)
request.setHTTPAccept(defaultAcceptHeader);
// Make sure we send the Origin header.
addHTTPOriginIfNeeded(request, String());
// Always try UTF-8. If that fails, try frame encoding (if any) and then the default.
Settings* settings = m_frame->settings();
request.setResponseContentDispositionEncodingFallbackArray("UTF-8", m_frame->document()->encoding(), settings ? settings->defaultTextEncodingName() : String());
}
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 ResourceRequest& inRequest, const String& referrer, const String& frameName, bool lockHistory, FrameLoadType loadType, PassRefPtr<Event> event, PassRefPtr<FormState> prpFormState)
{
RefPtr<FormState> formState = prpFormState;
// Previously when this method was reached, the original FrameLoadRequest had been deconstructed to build a
// bunch of parameters that would come in here and then be built back up to a ResourceRequest. In case
// any caller depends on the immutability of the original ResourceRequest, I'm rebuilding a ResourceRequest
// from scratch as it did all along.
const KURL& url = inRequest.url();
RefPtr<FormData> formData = inRequest.httpBody();
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(formData);
workingResourceRequest.setHTTPContentType(contentType);
addExtraFieldsToRequest(workingResourceRequest, loadType, true);
NavigationAction action(workingResourceRequest, loadType, true, event);
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());
else
policyChecker()->checkNewWindowPolicy(action, FrameLoader::callContinueLoadAfterNewWindowPolicy, workingResourceRequest, formState.release(), frameName, this);
} else {
// 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());
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, Vector<char>& 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());
if (Page* page = m_frame->page())
initialRequest.setFirstPartyForCookies(page->mainFrame()->loader()->documentLoader()->request().url());
addExtraFieldsToSubresourceRequest(initialRequest);
unsigned long identifier = 0;
ResourceRequest newRequest(initialRequest);
requestFromDelegate(newRequest, identifier, error);
if (error.isNull()) {
ASSERT(!newRequest.isNull());
if (!documentLoader()->applicationCacheHost()->maybeLoadSynchronously(newRequest, error, response, data)) {
platformStrategies()->loaderStrategy()->loadResourceSynchronously(networkingContext(), identifier, newRequest, storedCredentials, clientCredentialPolicy, error, response, data);
documentLoader()->applicationCacheHost()->maybeLoadFallbackSynchronously(newRequest, error, response, data);
}
}
notifier()->sendRemainingDelegateMessages(m_documentLoader.get(), identifier, request, response, data.data(), data.size(), -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.
RefPtr<Frame> protect(m_frame);
RefPtr<DocumentLoader> 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 = KURL();
// 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::callContinueFragmentScrollAfterNavigationPolicy(void* argument,
const ResourceRequest& request, PassRefPtr<FormState>, bool shouldContinue)
{
FrameLoader* loader = static_cast<FrameLoader*>(argument);
loader->continueFragmentScrollAfterNavigationPolicy(request, shouldContinue);
}
void FrameLoader::continueFragmentScrollAfterNavigationPolicy(const ResourceRequest& request, bool shouldContinue)
{
m_quickRedirectComing = false;
if (!shouldContinue)
return;
// 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(0);
}
bool isRedirect = m_quickRedirectComing || policyChecker()->loadType() == FrameLoadTypeRedirectWithLockedBackForwardList;
loadInSameDocument(request.url(), 0, !isRedirect);
}
bool FrameLoader::shouldPerformFragmentNavigation(bool isFormSubmission, const String& httpMethod, FrameLoadType loadType, const KURL& 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 || equalIgnoringCase(httpMethod, "GET"))
&& loadType != FrameLoadTypeReload
&& loadType != FrameLoadTypeReloadFromOrigin
&& loadType != FrameLoadTypeSame
&& !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 KURL& 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<Frame> boundaryFrame(url.