CachedResource* CachedResourceLoader::loadResource(CachedResource::Type type, ResourceRequest& request, const String& charset, ResourceLoadPriority priority)
{
ASSERT(!memoryCache()->resourceForURL(request.url()));
LOG(ResourceLoading, "Loading CachedResource for '%s'.", request.url().string().latin1().data());
CachedResource* resource = createResource(type, request, charset);
bool inCache = memoryCache()->add(resource);
// Pretend the resource is in the cache, to prevent it from being deleted during the load() call.
// FIXME: CachedResource should just use normal refcounting instead.
if (!inCache)
resource->setInCache(true);
resource->setLoadPriority(priority);
resource->load(this);
if (!inCache) {
resource->setOwningCachedResourceLoader(this);
resource->setInCache(false);
}
// We don't support immediate loads, but we do support immediate failure.
if (resource->errorOccurred()) {
if (inCache)
memoryCache()->remove(resource);
else
delete resource;
return 0;
}
m_validatedURLs.add(request.url());
return resource;
}
CachedResource* CachedResourceLoader::revalidateResource(CachedResource* resource, ResourceLoadPriority priority, const ResourceLoaderOptions& options)
{
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();
bool urlProtocolIsData = resource->url().protocolIsData();
CachedResource* newResource = createResource(resource->type(), resource->resourceRequest(), resource->encoding());
LOG(ResourceLoading, "Resource %p created to revalidate %p", newResource, resource);
newResource->setResourceToRevalidate(resource);
memoryCache()->remove(resource);
memoryCache()->add(newResource);
newResource->setLoadPriority(priority);
newResource->load(this, options);
if (!urlProtocolIsData)
m_validatedURLs.add(url);
return newResource;
}
CachedResource* CachedResourceLoader::revalidateResource(CachedResource* resource, ResourceLoadPriority priority)
{
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();
CachedResource* newResource = createResource(resource->type(), KURL(ParsedURLString, url), resource->encoding());
LOG(ResourceLoading, "Resource %p created to revalidate %p", newResource, resource);
newResource->setResourceToRevalidate(resource);
memoryCache()->remove(resource);
memoryCache()->add(newResource);
newResource->setLoadPriority(priority);
newResource->load(this);
m_validatedURLs.add(url);
return newResource;
}
