bool MainResourceLoader::loadNow(ResourceRequest& r)
{
bool shouldLoadEmptyBeforeRedirect = shouldLoadAsEmptyDocument(r.url());
ASSERT(!m_handle);
ASSERT(shouldLoadEmptyBeforeRedirect || !defersLoading());
// Send this synthetic delegate callback since clients expect it, and
// we no longer send the callback from within NSURLConnection for
// initial requests.
willSendRequest(r, ResourceResponse());
ASSERT(!deletionHasBegun());
// <rdar://problem/4801066>
// willSendRequest() is liable to make the call to frameLoader() return NULL, so we need to check that here
if (!frameLoader())
return false;
const KURL& url = r.url();
bool shouldLoadEmpty = shouldLoadAsEmptyDocument(url) && !m_substituteData.isValid();
if (shouldLoadEmptyBeforeRedirect && !shouldLoadEmpty && defersLoading())
return true;
resourceLoadScheduler()->addMainResourceLoad(this);
if (m_substituteData.isValid())
handleSubstituteDataLoadSoon(r);
else if (shouldLoadEmpty || frameLoader()->client()->representationExistsForURLScheme(url.protocol()))
handleEmptyLoad(url, !shouldLoadEmpty);
else
m_handle = ResourceHandle::create(m_frame->loader()->networkingContext(), r, this, false, true);
return false;
}
void MainResourceLoader::load(const ResourceRequest& initialRequest, const SubstituteData& substituteData)
{
// It appears that it is possible for this load to be cancelled and derefenced by the DocumentLoader
// in willSendRequest() if loadNow() is called.
RefPtr<MainResourceLoader> protect(this);
m_substituteData = substituteData;
ASSERT(documentLoader()->timing()->navigationStart());
ASSERT(!documentLoader()->timing()->fetchStart());
documentLoader()->timing()->markFetchStart();
ResourceRequest request(initialRequest);
// Send this synthetic delegate callback since clients expect it, and
// we no longer send the callback from within NSURLConnection for
// initial requests.
willSendRequest(request, ResourceResponse());
ASSERT(!deletionHasBegun());
// willSendRequest() may lead to our DocumentLoader being detached or cancelling the load via nulling the ResourceRequest.
if (!documentLoader()->frame() || request.isNull())
return;
documentLoader()->applicationCacheHost()->maybeLoadMainResource(request, m_substituteData);
if (m_substituteData.isValid()) {
m_identifierForLoadWithoutResourceLoader = m_documentLoader->frame()->page()->progress()->createUniqueIdentifier();
frameLoader()->notifier()->assignIdentifierToInitialRequest(m_identifierForLoadWithoutResourceLoader, documentLoader(), request);
frameLoader()->notifier()->dispatchWillSendRequest(documentLoader(), m_identifierForLoadWithoutResourceLoader, request, ResourceResponse());
handleSubstituteDataLoadSoon(request);
return;
}
DEFINE_STATIC_LOCAL(ResourceLoaderOptions, mainResourceLoadOptions,
(SendCallbacks, SniffContent, BufferData, AllowStoredCredentials, AskClientForCrossOriginCredentials, SkipSecurityCheck));
CachedResourceRequest cachedResourceRequest(request, mainResourceLoadOptions);
m_resource = documentLoader()->cachedResourceLoader()->requestMainResource(cachedResourceRequest);
if (!m_resource) {
documentLoader()->setRequest(ResourceRequest());
return;
}
if (!loader()) {
m_identifierForLoadWithoutResourceLoader = m_documentLoader->frame()->page()->progress()->createUniqueIdentifier();
frameLoader()->notifier()->assignIdentifierToInitialRequest(m_identifierForLoadWithoutResourceLoader, documentLoader(), request);
frameLoader()->notifier()->dispatchWillSendRequest(documentLoader(), m_identifierForLoadWithoutResourceLoader, request, ResourceResponse());
}
m_resource->addClient(this);
// A bunch of headers are set when the underlying ResourceLoader is created, and DocumentLoader::m_request needs to include those.
if (loader())
request = loader()->originalRequest();
// If there was a fragment identifier on initialRequest, the cache will have stripped it. DocumentLoader::m_request should include
// the fragment identifier, so add that back in.
if (equalIgnoringFragmentIdentifier(initialRequest.url(), request.url()))
request.setURL(initialRequest.url());
documentLoader()->setRequest(request);
}
void DocumentLoader::startLoadingMainResource()
{
m_mainDocumentError = ResourceError();
timing()->markNavigationStart();
ASSERT(!m_mainResource);
ASSERT(!m_loadingMainResource);
m_loadingMainResource = true;
if (maybeLoadEmpty())
return;
ASSERT(timing()->navigationStart());
ASSERT(!timing()->fetchStart());
timing()->markFetchStart();
willSendRequest(m_request, ResourceResponse());
// willSendRequest() may lead to our Frame being detached or cancelling the load via nulling the ResourceRequest.
if (!m_frame || m_request.isNull())
return;
m_applicationCacheHost->willStartLoadingMainResource(m_request);
prepareSubframeArchiveLoadIfNeeded();
if (m_substituteData.isValid()) {
m_identifierForLoadWithoutResourceLoader = createUniqueIdentifier();
frameLoader()->notifier()->dispatchWillSendRequest(this, m_identifierForLoadWithoutResourceLoader, m_request, ResourceResponse());
handleSubstituteDataLoadSoon();
return;
}
ResourceRequest request(m_request);
DEFINE_STATIC_LOCAL(ResourceLoaderOptions, mainResourceLoadOptions,
(SendCallbacks, SniffContent, DoNotBufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, SkipSecurityCheck, CheckContentSecurityPolicy, UseDefaultOriginRestrictionsForType));
CachedResourceRequest cachedResourceRequest(request, cachedResourceRequestInitiators().document, mainResourceLoadOptions);
m_mainResource = m_cachedResourceLoader->requestMainResource(cachedResourceRequest);
if (!m_mainResource) {
setRequest(ResourceRequest());
// If the load was aborted by clearing m_request, it's possible the ApplicationCacheHost
// is now in a state where starting an empty load will be inconsistent. Replace it with
// a new ApplicationCacheHost.
m_applicationCacheHost = adoptPtr(new ApplicationCacheHost(this));
maybeLoadEmpty();
return;
}
m_mainResource->addClient(this);
// A bunch of headers are set when the underlying ResourceLoader is created, and m_request needs to include those.
if (mainResourceLoader())
request = mainResourceLoader()->originalRequest();
// If there was a fragment identifier on m_request, the cache will have stripped it. m_request should include
// the fragment identifier, so add that back in.
if (equalIgnoringFragmentIdentifier(m_request.url(), request.url()))
request.setURL(m_request.url());
setRequest(request);
}
void MainResourceLoader::continueAfterNavigationPolicy(const ResourceRequest& request, bool shouldContinue)
{
if (!shouldContinue)
stopLoadingForPolicyChange();
else if (m_substituteData.isValid()) {
// A redirect resulted in loading substitute data.
ASSERT(documentLoader()->timing()->redirectCount());
handle()->cancel();
handleSubstituteDataLoadSoon(request);
}
deref(); // balances ref in willSendRequest
}
void MainResourceLoader::load(const ResourceRequest& initialRequest, const SubstituteData& substituteData)
{
// It appears that it is possible for this load to be cancelled and derefenced by the DocumentLoader
// in willSendRequest() if loadNow() is called.
RefPtr<MainResourceLoader> protect(this);
m_substituteData = substituteData;
ASSERT(documentLoader()->timing()->navigationStart());
ASSERT(!documentLoader()->timing()->fetchStart());
documentLoader()->timing()->markFetchStart();
ResourceRequest request(initialRequest);
// Send this synthetic delegate callback since clients expect it, and
// we no longer send the callback from within NSURLConnection for
// initial requests.
willSendRequest(request, ResourceResponse());
ASSERT(!deletionHasBegun());
// willSendRequest() may lead to our DocumentLoader being detached or cancelling the load via nulling the ResourceRequest.
if (!documentLoader()->frame() || request.isNull())
return;
documentLoader()->applicationCacheHost()->maybeLoadMainResource(request, m_substituteData);
if (m_substituteData.isValid()) {
handleSubstituteDataLoadSoon(request);
return;
}
DEFINE_STATIC_LOCAL(ResourceLoaderOptions, mainResourceLoadOptions,
(SendCallbacks, SniffContent, BufferData, AllowStoredCredentials, AskClientForCrossOriginCredentials, SkipSecurityCheck));
CachedResourceRequest cachedResourceRequest(request, mainResourceLoadOptions);
m_resource = documentLoader()->cachedResourceLoader()->requestMainResource(cachedResourceRequest);
if (!m_resource) {
documentLoader()->setRequest(ResourceRequest());
return;
}
m_resource->addClient(this);
// We need to wait until after requestMainResource() is called to setRequest(), because there are a bunch of headers set when
// the underlying ResourceLoader is created, and DocumentLoader::m_request needs to include those. However, the cache will
// strip the fragment identifier (which DocumentLoader::m_request should also include), so add that back in.
if (loader())
request = loader()->originalRequest();
documentLoader()->setRequest(request);
}
void MainResourceLoader::loadNow(ResourceRequest& r)
{
ASSERT(!m_handle);
ASSERT(!defersLoading());
#if USE(PLATFORM_STRATEGIES)
platformStrategies()->loaderStrategy()->resourceLoadScheduler()->addMainResourceLoad(this);
#else
resourceLoadScheduler()->addMainResourceLoad(this);
#endif
if (m_substituteData.isValid())
handleSubstituteDataLoadSoon(r);
else
m_handle = ResourceHandle::create(m_frame->loader()->networkingContext(), r, this, false, true);
return;
}
void MainResourceLoader::continueAfterNavigationPolicy(const ResourceRequest& request, bool shouldContinue)
{
if (!shouldContinue)
stopLoadingForPolicyChange();
else if (m_substituteData.isValid()) {
// A redirect resulted in loading substitute data.
ASSERT(documentLoader()->timing()->redirectCount());
// We need to remove our reference to the CachedResource in favor of a SubstituteData load.
// This will probably trigger the cancellation of the CachedResource's underlying ResourceLoader, though there is a
// small chance that the resource is being loaded by a different Frame, preventing the ResourceLoader from being cancelled.
// If the ResourceLoader is indeed cancelled, it would normally send resource load callbacks.
// However, from an API perspective, this isn't a cancellation. Therefore, sever our relationship with the network load via clearResource(),
// but prevent the ResourceLoader from sending ResourceLoadNotifier callbacks.
RefPtr<ResourceLoader> resourceLoader = loader();
ASSERT(resourceLoader->shouldSendResourceLoadCallbacks());
resourceLoader->setSendCallbackPolicy(DoNotSendCallbacks);
clearResource();
resourceLoader->setSendCallbackPolicy(SendCallbacks);
handleSubstituteDataLoadSoon(request);
}
deref(); // balances ref in willSendRequest
}
