void ScriptRunner::queueScriptForExecution(ScriptElement* scriptElement, CachedResourceHandle<CachedScript> cachedScript, ExecutionType executionType)
{
ASSERT(scriptElement);
ASSERT(cachedScript.get());
Element* element = scriptElement->element();
ASSERT(element);
ASSERT(element->inDocument());
m_document->incrementLoadEventDelayCount();
switch (executionType) {
case ASYNC_EXECUTION:
m_scriptsToExecuteSoon.append(PendingScript(element, cachedScript.get()));
if (!m_timer.isActive())
m_timer.startOneShot(0);
break;
case IN_ORDER_EXECUTION:
m_scriptsToExecuteInOrder.append(PendingScript(element, cachedScript.get()));
break;
default:
ASSERT_NOT_REACHED();
}
}
void ScriptRunner::queueScriptForExecution(ScriptElement* scriptElement, CachedResourceHandle<CachedScript> cachedScript, ExecutionType executionType)
{
ASSERT(scriptElement);
// Temporary: intended to help debug how null CachedScript objects can even get queued for execution, which
// seems to sometimes happen (see http://code.google.com/p/chromium/issues/detail?id=75604 )
if (!cachedScript.get())
CRASH();
Element* element = scriptElement->element();
ASSERT(element);
ASSERT(element->inDocument());
m_document->incrementLoadEventDelayCount();
switch (executionType) {
case ASYNC_EXECUTION:
m_scriptsToExecuteSoon.append(PendingScript(element, cachedScript.get()));
if (!m_timer.isActive())
m_timer.startOneShot(0);
break;
case IN_ORDER_EXECUTION:
m_scriptsToExecuteInOrder.append(PendingScript(element, cachedScript.get()));
break;
default:
ASSERT_NOT_REACHED();
}
}
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);
}
}
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 ScriptRunner::queueScriptForExecution(ScriptElement* scriptElement, CachedResourceHandle<CachedScript> cachedScript, ExecutionType executionType)
{
ASSERT(scriptElement);
ASSERT(cachedScript.get());
Element& element = scriptElement->element();
ASSERT(element.inDocument());
m_document.incrementLoadEventDelayCount();
switch (executionType) {
case ASYNC_EXECUTION:
m_pendingAsyncScripts.add(scriptElement, PendingScript(&element, cachedScript.get()));
break;
case IN_ORDER_EXECUTION:
m_scriptsToExecuteInOrder.append(PendingScript(&element, cachedScript.get()));
break;
}
}
void AsyncScriptRunner::executeScriptSoon(ScriptElement* scriptElement, CachedResourceHandle<CachedScript> cachedScript)
{
ASSERT_ARG(scriptElement, scriptElement);
Element* element = scriptElement->element();
ASSERT(element);
ASSERT(element->inDocument());
m_document->incrementLoadEventDelayCount();
m_scriptsToExecuteSoon.append(PendingScript(element, cachedScript.get()));
if (!m_timer.isActive())
m_timer.startOneShot(0);
}
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 ScriptRunner::queueScriptForExecution(ScriptElement* scriptElement, CachedResourceHandle<CachedScript> cachedScript, ExecutionType executionType)
{
ASSERT(scriptElement);
ASSERT(cachedScript.get());
Element* element = scriptElement->element();
ASSERT(element);
ASSERT(element->inDocument());
m_document->incrementLoadEventDelayCount();
switch (executionType) {
case ASYNC_EXECUTION:
m_pendingAsyncScripts.add(scriptElement, PendingScript(element, cachedScript.get()));
break;
case IN_ORDER_EXECUTION:
m_scriptsToExecuteInOrder.append(PendingScript(element, cachedScript.get()));
ActionLogFormat(ActionLog::WRITE_MEMORY, "ScriptRunner-%p-%p",
static_cast<void*>(this), static_cast<void*>(scriptElement));
break;
}
}
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<CachedResource> CachedResourceLoader::revalidateResource(const CachedResourceRequest& request, CachedResource* resource)
{
ASSERT(resource);
ASSERT(resource->inCache());
ASSERT(!memoryCache()->disabled());
ASSERT(resource->canUseCacheValidator());
ASSERT(!resource->resourceToRevalidate());
// Copy the URL out of the resource to be revalidated in case it gets deleted by the remove() call below.
String url = resource->url();
CachedResourceHandle<CachedResource> newResource = createResource(resource->type(), resource->resourceRequest(), resource->encoding());
LOG(ResourceLoading, "Resource %p created to revalidate %p", newResource.get(), resource);
newResource->setResourceToRevalidate(resource);
memoryCache()->remove(resource);
memoryCache()->add(newResource.get());
#if ENABLE(RESOURCE_TIMING)
storeResourceTimingInitiatorInformation(resource, request);
#else
UNUSED_PARAM(request);
#endif
return newResource;
}
void ImageLoader::updateFromElement()
{
// If we're not making renderers for the page, then don't load images. We don't want to slow
// down the raw HTML parsing case by loading images we don't intend to display.
Document* document = m_element->document();
if (!document->renderer())
return;
AtomicString attr = m_element->imageSourceURL();
if (attr == m_failedLoadURL)
return;
// Do not load any image if the 'src' attribute is missing or if it is
// an empty string.
CachedResourceHandle<CachedImage> newImage = 0;
if (!attr.isNull() && !stripLeadingAndTrailingHTMLSpaces(attr).isEmpty()) {
CachedResourceRequest request(ResourceRequest(document->completeURL(sourceURI(attr))));
request.setInitiator(element());
String crossOriginMode = m_element->fastGetAttribute(HTMLNames::crossoriginAttr);
if (!crossOriginMode.isNull()) {
StoredCredentials allowCredentials = equalIgnoringCase(crossOriginMode, "use-credentials") ? AllowStoredCredentials : DoNotAllowStoredCredentials;
updateRequestForAccessControl(request.mutableResourceRequest(), document->securityOrigin(), allowCredentials);
}
if (m_loadManually) {
bool autoLoadOtherImages = document->cachedResourceLoader()->autoLoadImages();
document->cachedResourceLoader()->setAutoLoadImages(false);
newImage = new CachedImage(request.resourceRequest());
newImage->setLoading(true);
newImage->setOwningCachedResourceLoader(document->cachedResourceLoader());
document->cachedResourceLoader()->m_documentResources.set(newImage->url(), newImage.get());
document->cachedResourceLoader()->setAutoLoadImages(autoLoadOtherImages);
} else
newImage = document->cachedResourceLoader()->requestImage(request);
// If we do not have an image here, it means that a cross-site
// violation occurred, or that the image was blocked via Content
// Security Policy, or the page is being dismissed. Trigger an
// error event if the page is not being dismissed.
if (!newImage && !pageIsBeingDismissed(document)) {
m_failedLoadURL = attr;
m_hasPendingErrorEvent = true;
errorEventSender().dispatchEventSoon(this);
} else
clearFailedLoadURL();
} else if (!attr.isNull()) {
// Fire an error event if the url is empty.
// FIXME: Should we fire this event asynchronoulsy via errorEventSender()?
m_element->dispatchEvent(Event::create(eventNames().errorEvent, false, false));
}
CachedImage* oldImage = m_image.get();
if (newImage != oldImage) {
if (m_hasPendingBeforeLoadEvent) {
beforeLoadEventSender().cancelEvent(this);
m_hasPendingBeforeLoadEvent = false;
}
if (m_hasPendingLoadEvent) {
loadEventSender().cancelEvent(this);
m_hasPendingLoadEvent = false;
}
// Cancel error events that belong to the previous load, which is now cancelled by changing the src attribute.
// If newImage is null and m_hasPendingErrorEvent is true, we know the error event has been just posted by
// this load and we should not cancel the event.
// FIXME: If both previous load and this one got blocked with an error, we can receive one error event instead of two.
if (m_hasPendingErrorEvent && newImage) {
errorEventSender().cancelEvent(this);
m_hasPendingErrorEvent = false;
}
m_image = newImage;
m_hasPendingBeforeLoadEvent = !m_element->document()->isImageDocument() && newImage;
m_hasPendingLoadEvent = newImage;
m_imageComplete = !newImage;
if (newImage) {
if (!m_element->document()->isImageDocument()) {
if (!m_element->document()->hasListenerType(Document::BEFORELOAD_LISTENER))
dispatchPendingBeforeLoadEvent();
else
beforeLoadEventSender().dispatchEventSoon(this);
} else
updateRenderer();
// If newImage is cached, addClient() will result in the load event
// being queued to fire. Ensure this happens after beforeload is
// dispatched.
newImage->addClient(this);
}
if (oldImage)
oldImage->removeClient(this);
}
if (RenderImageResource* imageResource = renderImageResource())
imageResource->resetAnimation();
// Only consider updating the protection ref-count of the Element immediately before returning
// from this function as doing so might result in the destruction of this ImageLoader.
updatedHasPendingEvent();
}
void MemoryCache::pruneDeadResourcesToSize(unsigned targetSize)
{
if (m_inPruneResources)
return;
TemporaryChange<bool> reentrancyProtector(m_inPruneResources, true);
int size = m_allResources.size();
// See if we have any purged resources we can evict.
for (int i = 0; i < size; i++) {
CachedResource* current = m_allResources[i].m_tail;
while (current) {
CachedResource* prev = current->m_prevInAllResourcesList;
if (current->wasPurged()) {
ASSERT(!current->hasClients());
ASSERT(!current->isPreloaded());
evict(current);
}
current = prev;
}
}
if (targetSize && m_deadSize <= targetSize)
return;
bool canShrinkLRULists = true;
for (int i = size - 1; i >= 0; i--) {
// Remove from the tail, since this is the least frequently accessed of the objects.
CachedResource* current = m_allResources[i].m_tail;
// First flush all the decoded data in this queue.
while (current) {
// Protect 'previous' so it can't get deleted during destroyDecodedData().
CachedResourceHandle<CachedResource> previous = current->m_prevInAllResourcesList;
ASSERT(!previous || previous->inCache());
if (!current->hasClients() && !current->isPreloaded() && current->isLoaded()) {
// Destroy our decoded data. This will remove us from
// m_liveDecodedResources, and possibly move us to a different
// LRU list in m_allResources.
current->destroyDecodedData();
if (targetSize && m_deadSize <= targetSize)
return;
}
// Decoded data may reference other resources. Stop iterating if 'previous' somehow got
// kicked out of cache during destroyDecodedData().
if (previous && !previous->inCache())
break;
current = previous.get();
}
// Now evict objects from this queue.
current = m_allResources[i].m_tail;
while (current) {
CachedResourceHandle<CachedResource> previous = current->m_prevInAllResourcesList;
ASSERT(!previous || previous->inCache());
if (!current->hasClients() && !current->isPreloaded() && !current->isCacheValidator()) {
if (!makeResourcePurgeable(current))
evict(current);
if (targetSize && m_deadSize <= targetSize)
return;
}
if (previous && !previous->inCache())
break;
current = previous.get();
}
// Shrink the vector back down so we don't waste time inspecting
// empty LRU lists on future prunes.
if (m_allResources[i].m_head)
canShrinkLRULists = false;
else if (canShrinkLRULists)
m_allResources.resize(i);
}
}
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;
}