void Loader::Host::servePendingRequests(RequestQueue& requestsPending, bool& serveLowerPriority)
{
while (!requestsPending.isEmpty()) {
Request* request = requestsPending.first();
DocLoader* docLoader = request->docLoader();
bool resourceIsCacheValidator = request->cachedResource()->isCacheValidator();
// For named hosts - which are only http(s) hosts - we should always enforce the connection limit.
// For non-named hosts - everything but http(s) - we should only enforce the limit if the document isn't done parsing
// and we don't know all stylesheets yet.
bool shouldLimitRequests = !m_name.isNull() || docLoader->doc()->parsing() || !docLoader->doc()->haveStylesheetsLoaded();
if (shouldLimitRequests && m_requestsLoading.size() + m_nonCachedRequestsInFlight >= m_maxRequestsInFlight) {
serveLowerPriority = false;
cache()->loader()->scheduleServePendingRequests();
return;
}
requestsPending.removeFirst();
ResourceRequest resourceRequest(request->cachedResource()->url());
resourceRequest.setTargetType(cachedResourceTypeToTargetType(request->cachedResource()->type()));
if (!request->cachedResource()->accept().isEmpty())
resourceRequest.setHTTPAccept(request->cachedResource()->accept());
// Do not set the referrer or HTTP origin here. That's handled by SubresourceLoader::create.
if (resourceIsCacheValidator) {
CachedResource* resourceToRevalidate = request->cachedResource()->resourceToRevalidate();
ASSERT(resourceToRevalidate->canUseCacheValidator());
ASSERT(resourceToRevalidate->isLoaded());
const String& lastModified = resourceToRevalidate->response().httpHeaderField("Last-Modified");
const String& eTag = resourceToRevalidate->response().httpHeaderField("ETag");
if (!lastModified.isEmpty() || !eTag.isEmpty()) {
ASSERT(docLoader->cachePolicy() != CachePolicyReload);
if (docLoader->cachePolicy() == CachePolicyRevalidate)
resourceRequest.setHTTPHeaderField("Cache-Control", "max-age=0");
if (!lastModified.isEmpty())
resourceRequest.setHTTPHeaderField("If-Modified-Since", lastModified);
if (!eTag.isEmpty())
resourceRequest.setHTTPHeaderField("If-None-Match", eTag);
}
}
RefPtr<SubresourceLoader> loader = SubresourceLoader::create(docLoader->doc()->frame(),
this, resourceRequest, request->shouldDoSecurityCheck(), request->sendResourceLoadCallbacks());
if (loader) {
m_requestsLoading.add(loader.release(), request);
request->cachedResource()->setRequestedFromNetworkingLayer();
#if REQUEST_DEBUG
printf("HOST %s COUNT %d LOADING %s\n", resourceRequest.url().host().latin1().data(), m_requestsLoading.size(), request->cachedResource()->url().latin1().data());
#endif
} else {
docLoader->decrementRequestCount();
docLoader->setLoadInProgress(true);
request->cachedResource()->error();
docLoader->setLoadInProgress(false);
delete request;
}
}
}
PassOwnPtr<CachedResourceRequest> CachedResourceRequest::load(CachedResourceLoader* cachedResourceLoader, CachedResource* resource, bool incremental, SecurityCheckPolicy securityCheck, const ResourceLoaderOptions& options)
{
OwnPtr<CachedResourceRequest> request = adoptPtr(new CachedResourceRequest(cachedResourceLoader, resource, incremental));
ResourceRequest resourceRequest = resource->resourceRequest();
#if PLATFORM(CHROMIUM)
resourceRequest.setTargetType(cachedResourceTypeToTargetType(resource->type()));
#endif
if (!resource->accept().isEmpty())
resourceRequest.setHTTPAccept(resource->accept());
if (resource->isCacheValidator()) {
CachedResource* resourceToRevalidate = resource->resourceToRevalidate();
ASSERT(resourceToRevalidate->canUseCacheValidator());
ASSERT(resourceToRevalidate->isLoaded());
const String& lastModified = resourceToRevalidate->response().httpHeaderField("Last-Modified");
const String& eTag = resourceToRevalidate->response().httpHeaderField("ETag");
if (!lastModified.isEmpty() || !eTag.isEmpty()) {
ASSERT(cachedResourceLoader->cachePolicy() != CachePolicyReload);
if (cachedResourceLoader->cachePolicy() == CachePolicyRevalidate)
resourceRequest.setHTTPHeaderField("Cache-Control", "max-age=0");
if (!lastModified.isEmpty())
resourceRequest.setHTTPHeaderField("If-Modified-Since", lastModified);
if (!eTag.isEmpty())
resourceRequest.setHTTPHeaderField("If-None-Match", eTag);
}
}
#if ENABLE(LINK_PREFETCH)
if (resource->type() == CachedResource::LinkPrefetch || resource->type() == CachedResource::LinkPrerender || resource->type() == CachedResource::LinkSubresource)
resourceRequest.setHTTPHeaderField("Purpose", "prefetch");
#endif
ResourceLoadPriority priority = resource->loadPriority();
resourceRequest.setPriority(priority);
RefPtr<SubresourceLoader> loader = resourceLoadScheduler()->scheduleSubresourceLoad(cachedResourceLoader->document()->frame(), request.get(), resourceRequest, priority, securityCheck, options);
if (!loader || loader->reachedTerminalState()) {
// FIXME: What if resources in other frames were waiting for this revalidation?
LOG(ResourceLoading, "Cannot start loading '%s'", resource->url().string().latin1().data());
if (resource->resourceToRevalidate())
memoryCache()->revalidationFailed(resource);
resource->error(CachedResource::LoadError);
//+EAWebKitChange
//10/19/2012
return PassOwnPtr<CachedResourceRequest>(std::nullptr_t()) ;
//-EAWebKitChange
}
request->m_loader = loader;
return request.release();
}
