void SVGUseElement::updateExternalDocument()
{
URL externalDocumentURL;
if (inDocument() && isExternalURIReference(href(), document())) {
externalDocumentURL = document().completeURL(href());
if (!externalDocumentURL.hasFragmentIdentifier())
externalDocumentURL = URL();
}
if (externalDocumentURL == (m_externalDocument ? m_externalDocument->url() : URL()))
return;
if (m_externalDocument)
m_externalDocument->removeClient(this);
if (externalDocumentURL.isNull())
m_externalDocument = nullptr;
else {
ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
options.setContentSecurityPolicyImposition(isInUserAgentShadowTree() ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck);
CachedResourceRequest request { ResourceRequest { externalDocumentURL }, options };
request.setInitiator(this);
m_externalDocument = document().cachedResourceLoader().requestSVGDocument(request);
if (m_externalDocument)
m_externalDocument->addClient(this);
}
invalidateShadowTree();
}
void SVGUseElement::updateExternalDocument()
{
URL externalDocumentURL;
if (inDocument() && isExternalURIReference(href(), document())) {
externalDocumentURL = document().completeURL(href());
if (!externalDocumentURL.hasFragmentIdentifier())
externalDocumentURL = URL();
}
if (externalDocumentURL == (m_externalDocument ? m_externalDocument->url() : URL()))
return;
if (m_externalDocument)
m_externalDocument->removeClient(this);
if (externalDocumentURL.isNull())
m_externalDocument = nullptr;
else {
CachedResourceRequest request { ResourceRequest { externalDocumentURL } };
request.setInitiator(this);
m_externalDocument = document().cachedResourceLoader().requestSVGDocument(request);
if (m_externalDocument) {
// FIXME: Is it really OK for us to set this to false for a document that might be shared by another client?
m_externalDocument->setShouldCreateFrameForDocument(false); // No frame needed, we just want the elements.
m_externalDocument->addClient(this);
}
}
invalidateShadowTree();
}
CachedResourceHandle<CachedImage> CachedResourceLoader::requestImage(CachedResourceRequest& request)
{
if (Frame* f = frame()) {
if (f->loader()->pageDismissalEventBeingDispatched() != FrameLoader::NoDismissal) {
KURL requestURL = request.resourceRequest().url();
if (requestURL.isValid() && canRequest(CachedResource::ImageResource, requestURL))
PingLoader::loadImage(f, requestURL);
return 0;
}
}
request.setDefer(clientDefersImage(request.resourceRequest().url()) ? CachedResourceRequest::DeferredByClient : CachedResourceRequest::NoDefer);
return static_cast<CachedImage*>(requestResource(CachedResource::ImageResource, request).get());
}
CachedResourceHandle<CachedResource> CachedResourceLoader::loadResource(CachedResource::Type type, CachedResourceRequest& request, const String& charset)
{
ASSERT(!memoryCache()->resourceForRequest(request.resourceRequest()));
LOG(ResourceLoading, "Loading CachedResource for '%s'.", request.resourceRequest().url().elidedString().latin1().data());
CachedResourceHandle<CachedResource> resource = createResource(type, request.mutableResourceRequest(), charset);
if (!memoryCache()->add(resource.get()))
resource->setOwningCachedResourceLoader(this);
#if ENABLE(RESOURCE_TIMING)
storeResourceTimingInitiatorInformation(resource, request);
#endif
return resource;
}
CachedResourceHandle<CachedCSSStyleSheet> CachedResourceLoader::requestUserCSSStyleSheet(CachedResourceRequest& request)
{
KURL url = MemoryCache::removeFragmentIdentifierIfNeeded(request.resourceRequest().url());
#if ENABLE(CACHE_PARTITIONING)
request.mutableResourceRequest().setCachePartition(document()->topOrigin()->cachePartition());
#endif
if (CachedResource* existing = memoryCache()->resourceForRequest(request.resourceRequest())) {
if (existing->type() == CachedResource::CSSStyleSheet)
return static_cast<CachedCSSStyleSheet*>(existing);
memoryCache()->remove(existing);
}
if (url.string() != request.resourceRequest().url())
request.mutableResourceRequest().setURL(url);
CachedResourceHandle<CachedCSSStyleSheet> userSheet = new CachedCSSStyleSheet(request.resourceRequest(), request.charset());
memoryCache()->add(userSheet.get());
// FIXME: loadResource calls setOwningCachedResourceLoader() if the resource couldn't be added to cache. Does this function need to call it, too?
userSheet->load(this, ResourceLoaderOptions(DoNotSendCallbacks, SniffContent, BufferData, AllowStoredCredentials, AskClientForCrossOriginCredentials, SkipSecurityCheck));
return userSheet;
}
void CachedResourceLoader::requestPreload(CachedResource::Type type, CachedResourceRequest& request, const String& charset)
{
String encoding;
if (type == CachedResource::Script || type == CachedResource::CSSStyleSheet)
encoding = charset.isEmpty() ? m_document->charset() : charset;
request.setCharset(encoding);
request.setForPreload(true);
CachedResourceHandle<CachedResource> resource = requestResource(type, request);
if (!resource || (m_preloads && m_preloads->contains(resource.get())))
return;
resource->increasePreloadCount();
if (!m_preloads)
m_preloads = adoptPtr(new ListHashSet<CachedResource*>);
m_preloads->add(resource.get());
#if PRELOAD_DEBUG
printf("PRELOADING %s\n", resource->url().latin1().data());
#endif
}
void CachedResourceLoader::storeResourceTimingInitiatorInformation(const CachedResourceHandle<CachedResource>& resource, const CachedResourceRequest& request)
{
if (resource->type() == CachedResource::MainResource) {
// <iframe>s should report the initial navigation requested by the parent document, but not subsequent navigations.
if (frame()->ownerElement() && m_documentLoader->frameLoader()->stateMachine()->committingFirstRealLoad()) {
InitiatorInfo info = { frame()->ownerElement()->localName(), monotonicallyIncreasingTime() };
m_initiatorMap.add(resource.get(), info);
}
} else {
InitiatorInfo info = { request.initiatorName(), monotonicallyIncreasingTime() };
m_initiatorMap.add(resource.get(), info);
}
}
void ResourceTimingInformation::storeResourceTimingInitiatorInformation(const CachedResourceHandle<CachedResource>& resource, const CachedResourceRequest& request, Frame* frame)
{
ASSERT(RuntimeEnabledFeatures::sharedFeatures().resourceTimingEnabled());
ASSERT(resource.get());
if (resource->type() == CachedResource::MainResource) {
// <iframe>s should report the initial navigation requested by the parent document, but not subsequent navigations.
ASSERT(frame);
if (frame->ownerElement()) {
InitiatorInfo info = { frame->ownerElement()->localName(), monotonicallyIncreasingTime(), NotYetAdded };
m_initiatorMap.add(resource.get(), info);
}
} else {
InitiatorInfo info = { request.initiatorName(), monotonicallyIncreasingTime(), NotYetAdded };
m_initiatorMap.add(resource.get(), info);
}
}
void CachedResourceLoader::preload(CachedResource::Type type, CachedResourceRequest& request, const String& charset)
{
bool delaySubresourceLoad = true;
#if PLATFORM(IOS) || PLATFORM(CHROMIUM)
delaySubresourceLoad = false;
#endif
#if PLATFORM(CHROMIUM)
// FIXME: All ports should take advantage of this, but first must support ResourceHandle::didChangePriority().
if (type == CachedResource::ImageResource)
request.setPriority(ResourceLoadPriorityVeryLow);
#endif
if (delaySubresourceLoad) {
bool hasRendering = m_document->body() && m_document->body()->renderer();
bool canBlockParser = type == CachedResource::Script || type == CachedResource::CSSStyleSheet;
if (!hasRendering && !canBlockParser) {
// Don't preload subresources that can't block the parser before we have something to draw.
// This helps prevent preloads from delaying first display when bandwidth is limited.
PendingPreload pendingPreload = { type, request, charset };
m_pendingPreloads.append(pendingPreload);
return;
}
}
requestPreload(type, request, charset);
}
CachedResourceHandle<CachedResource> CachedResourceLoader::requestResource(CachedResource::Type type, CachedResourceRequest& request)
{
KURL url = request.resourceRequest().url();
LOG(ResourceLoading, "CachedResourceLoader::requestResource '%s', charset '%s', priority=%d, forPreload=%u", url.elidedString().latin1().data(), request.charset().latin1().data(), request.priority(), request.forPreload());
// If only the fragment identifiers differ, it is the same resource.
url = MemoryCache::removeFragmentIdentifierIfNeeded(url);
if (!url.isValid())
return 0;
if (!canRequest(type, url, request.forPreload()))
return 0;
if (Frame* f = frame())
f->loader()->client()->dispatchWillRequestResource(&request);
if (memoryCache()->disabled()) {
DocumentResourceMap::iterator it = m_documentResources.find(url.string());
if (it != m_documentResources.end()) {
it->value->setOwningCachedResourceLoader(0);
m_documentResources.remove(it);
}
}
// See if we can use an existing resource from the cache.
CachedResourceHandle<CachedResource> resource;
#if ENABLE(CACHE_PARTITIONING)
if (document())
request.mutableResourceRequest().setCachePartition(document()->topOrigin()->cachePartition());
#endif
resource = memoryCache()->resourceForRequest(request.resourceRequest());
const RevalidationPolicy policy = determineRevalidationPolicy(type, request.mutableResourceRequest(), request.forPreload(), resource.get(), request.defer());
switch (policy) {
case Reload:
memoryCache()->remove(resource.get());
// Fall through
case Load:
resource = loadResource(type, request, request.charset());
break;
case Revalidate:
resource = revalidateResource(request, resource.get());
break;
case Use:
memoryCache()->resourceAccessed(resource.get());
notifyLoadedFromMemoryCache(resource.get());
break;
}
if (!resource)
return 0;
if (!request.forPreload() || policy != Use)
resource->setLoadPriority(request.priority());
if ((policy != Use || resource->stillNeedsLoad()) && CachedResourceRequest::NoDefer == request.defer()) {
resource->load(this, request.options());
// We don't support immediate loads, but we do support immediate failure.
if (resource->errorOccurred()) {
if (resource->inCache())
memoryCache()->remove(resource.get());
return 0;
}
}
#if PLATFORM(CHROMIUM)
// FIXME: Temporarily leave main resource caching disabled for chromium, see https://bugs.webkit.org/show_bug.cgi?id=107962
// Ensure main resources aren't preloaded, and other main resource loads are removed from cache to prevent reuse.
if (type == CachedResource::MainResource) {
ASSERT(policy != Use);
ASSERT(policy != Revalidate);
memoryCache()->remove(resource.get());
if (request.forPreload())
return 0;
}
#endif
if (!request.resourceRequest().url().protocolIsData())
m_validatedURLs.add(request.resourceRequest().url());
ASSERT(resource->url() == url.string());
m_documentResources.set(resource->url(), resource);
return resource;
}