bool DocumentLoader::isLoading() const
{
if (document() && document()->hasActiveParser())
return true;
return isLoadingMainResource() || !m_resourceLoaders.isEmpty();
}
// Cancels the data source's pending loads. Conceptually, a data source only loads
// one document at a time, but one document may have many related resources.
// stopLoading will stop all loads initiated by the data source,
// but not loads initiated by child frames' data sources -- that's the WebFrame's job.
void DocumentLoader::stopLoading()
{
RefPtr<Frame> protectFrame(m_frame);
RefPtr<DocumentLoader> protectLoader(this);
// In some rare cases, calling FrameLoader::stopLoading could cause isLoading() to return false.
// (This can happen when there's a single XMLHttpRequest currently loading and stopLoading causes it
// to stop loading. Because of this, we need to save it so we don't return early.
bool loading = isLoading();
if (m_committed) {
// Attempt to stop the frame if the document loader is loading, or if it is done loading but
// still parsing. Failure to do so can cause a world leak.
Document* doc = m_frame->document();
if (loading || doc->parsing())
m_frame->loader()->stopLoading(UnloadEventPolicyNone);
}
// Always cancel multipart loaders
cancelAll(m_multipartResourceLoaders);
clearArchiveResources();
if (!loading) {
// If something above restarted loading we might run into mysterious crashes like
// https://bugs.webkit.org/show_bug.cgi?id=62764 and <rdar://problem/9328684>
ASSERT(!isLoading());
return;
}
// We might run in to infinite recursion if we're stopping loading as the result of
// detaching from the frame, so break out of that recursion here.
// See <rdar://problem/9673866> for more details.
if (m_isStopping)
return;
m_isStopping = true;
FrameLoader* frameLoader = DocumentLoader::frameLoader();
if (isLoadingMainResource())
// Stop the main resource loader and let it send the cancelled message.
cancelMainResourceLoad(frameLoader->cancelledError(m_request));
else if (!m_resourceLoaders.isEmpty())
// The main resource loader already finished loading. Set the cancelled error on the
// document and let the resourceLoaders send individual cancelled messages below.
setMainDocumentError(frameLoader->cancelledError(m_request));
else
// If there are no resource loaders, we need to manufacture a cancelled message.
// (A back/forward navigation has no resource loaders because its resources are cached.)
mainReceivedError(frameLoader->cancelledError(m_request));
stopLoadingSubresources();
m_isStopping = false;
}
bool DocumentLoader::isLoading() const
{
// FIXME: This should always be enabled, but it seems to cause
// http/tests/security/feed-urls-from-remote.html to timeout on Mac WK1
// see http://webkit.org/b/110554 and http://webkit.org/b/110401
#if ENABLE(THREADED_HTML_PARSER)
if (document() && document()->hasActiveParser())
return true;
#endif
return isLoadingMainResource() || !m_subresourceLoaders.isEmpty() || !m_plugInStreamLoaders.isEmpty();
}
void DocumentLoader::transferLoadingResourcesFromPage(Page* oldPage)
{
ASSERT(oldPage != m_frame->page());
FrameLoader* loader = frameLoader();
ASSERT(loader);
if (isLoadingMainResource())
loader->dispatchTransferLoadingResourceFromPage(m_mainResourceLoader.get(), originalRequest(), oldPage);
if (isLoadingSubresources()) {
ResourceLoaderSet::const_iterator it = m_subresourceLoaders.begin();
ResourceLoaderSet::const_iterator end = m_subresourceLoaders.end();
for (; it != end; ++it)
loader->dispatchTransferLoadingResourceFromPage((*it).get(), (*it)->originalRequest(), oldPage);
}
}
bool DocumentLoader::isLoadingInAPISense() const
{
// Once a frame has loaded, we no longer need to consider subresources,
// but we still need to consider subframes.
if (frameLoader()->state() != FrameStateComplete) {
Document* doc = m_frame->document();
if ((isLoadingMainResource() || !m_frame->document()->loadEventFinished()) && isLoading())
return true;
if (m_cachedResourceLoader->requestCount())
return true;
if (doc->processingLoadEvent())
return true;
if (doc->hasActiveParser())
return true;
}
return frameLoader()->subframeIsLoading();
}
bool DocumentLoader::isLoadingInAPISense() const
{
// Once a frame has loaded, we no longer need to consider subresources,
// but we still need to consider subframes.
if (frameLoader()->state() != FrameStateComplete) {
if (m_frame->settings()->needsIsLoadingInAPISenseQuirk() && !m_subresourceLoaders.isEmpty())
return true;
Document* doc = m_frame->document();
if ((isLoadingMainResource() || !m_frame->document()->loadEventFinished()) && isLoading())
return true;
if (m_cachedResourceLoader->requestCount())
return true;
if (DocumentParser* parser = doc->parser())
if (parser->processingData())
return true;
}
return frameLoader()->subframeIsLoading();
}
void NetworkResourceLoader::didReceiveResponseAsync(ResourceHandle* handle, const ResourceResponse& response)
{
ASSERT_UNUSED(handle, handle == m_handle);
// FIXME (NetworkProcess): Cache the response.
if (FormData* formData = request().httpBody())
formData->removeGeneratedFilesIfNeeded();
sendAbortingOnFailure(Messages::WebResourceLoader::DidReceiveResponseWithCertificateInfo(response, PlatformCertificateInfo(response), isLoadingMainResource()));
// m_handle will be 0 if the request got aborted above.
if (!m_handle)
return;
if (!isLoadingMainResource()) {
// For main resources, the web process is responsible for sending back a NetworkResourceLoader::ContinueDidReceiveResponse message.
m_handle->continueDidReceiveResponse();
}
}
void DocumentLoader::responseReceived(CachedResource* resource, const ResourceResponse& response)
{
ASSERT_UNUSED(resource, m_mainResource == resource);
RefPtr<DocumentLoader> protect(this);
m_applicationCacheHost->didReceiveResponseForMainResource(response);
// The memory cache doesn't understand the application cache or its caching rules. So if a main resource is served
// from the application cache, ensure we don't save the result for future use. All responses loaded
// from appcache will have a non-zero appCacheID().
if (response.appCacheID())
memoryCache()->remove(m_mainResource.get());
DEFINE_STATIC_LOCAL(AtomicString, xFrameOptionHeader, ("x-frame-options", AtomicString::ConstructFromLiteral));
HTTPHeaderMap::const_iterator it = response.httpHeaderFields().find(xFrameOptionHeader);
if (it != response.httpHeaderFields().end()) {
String content = it->value;
ASSERT(m_mainResource);
unsigned long identifier = mainResourceIdentifier();
ASSERT(identifier);
if (frameLoader()->shouldInterruptLoadForXFrameOptions(content, response.url(), identifier)) {
InspectorInstrumentation::continueAfterXFrameOptionsDenied(m_frame, this, identifier, response);
String message = "Refused to display '" + response.url().elidedString() + "' in a frame because it set 'X-Frame-Options' to '" + content + "'.";
frame()->document()->addConsoleMessage(SecurityMessageSource, ErrorMessageLevel, message, identifier);
frame()->document()->enforceSandboxFlags(SandboxOrigin);
if (HTMLFrameOwnerElement* ownerElement = frame()->ownerElement())
ownerElement->dispatchEvent(Event::create(eventNames().loadEvent, false, false));
// The load event might have detached this frame. In that case, the load will already have been cancelled during detach.
if (frameLoader())
cancelMainResourceLoad(frameLoader()->cancelledError(m_request));
return;
}
}
ASSERT(!mainResourceLoader() || !mainResourceLoader()->defersLoading());
m_response = response;
if (isArchiveMIMEType(m_response.mimeType()) && m_mainResource->dataBufferingPolicy() != BufferData)
m_mainResource->setDataBufferingPolicy(BufferData);
if (m_identifierForLoadWithoutResourceLoader)
frameLoader()->notifier()->dispatchDidReceiveResponse(this, m_identifierForLoadWithoutResourceLoader, m_response, 0);
if (!shouldContinueForResponse()) {
InspectorInstrumentation::continueWithPolicyIgnore(m_frame, this, m_mainResource->identifier(), m_response);
stopLoadingForPolicyChange();
return;
}
if (m_response.isHTTP()) {
int status = m_response.httpStatusCode();
if (status < 200 || status >= 300) {
bool hostedByObject = frameLoader()->isHostedByObjectElement();
frameLoader()->handleFallbackContent();
// object elements are no longer rendered after we fallback, so don't
// keep trying to process data from their load
if (hostedByObject)
cancelMainResourceLoad(frameLoader()->cancelledError(m_request));
}
}
if (!isStopping() && m_substituteData.isValid()) {
if (m_substituteData.content()->size())
dataReceived(0, m_substituteData.content()->data(), m_substituteData.content()->size());
if (isLoadingMainResource())
finishedLoading(0);
}
}
