ResourceLoader.cpp [plain text]
#include "config.h"
#include "ResourceLoader.h"
#include "ApplicationCacheHost.h"
#include "AsyncFileStream.h"
#include "AuthenticationChallenge.h"
#include "DocumentLoader.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "InspectorInstrumentation.h"
#include "LoaderStrategy.h"
#include "Page.h"
#include "PlatformStrategies.h"
#include "ProgressTracker.h"
#include "ResourceBuffer.h"
#include "ResourceError.h"
#include "ResourceHandle.h"
#include "ResourceLoadScheduler.h"
#include "SecurityOrigin.h"
#include "Settings.h"
#include "SharedBuffer.h"
namespace WebCore {
ResourceLoader::ResourceLoader(Frame* frame, ResourceLoaderOptions options)
: m_frame(frame)
, m_documentLoader(frame->loader()->activeDocumentLoader())
, m_identifier(0)
, m_reachedTerminalState(false)
, m_notifiedLoadComplete(false)
, m_cancellationStatus(NotCancelled)
, m_defersLoading(frame->page()->defersLoading())
, m_options(options)
{
}
ResourceLoader::~ResourceLoader()
{
ASSERT(m_reachedTerminalState);
}
void ResourceLoader::releaseResources()
{
ASSERT(!m_reachedTerminalState);
RefPtr<ResourceLoader> protector(this);
m_frame = 0;
m_documentLoader = 0;
m_reachedTerminalState = true;
platformStrategies()->loaderStrategy()->resourceLoadScheduler()->remove(this);
m_identifier = 0;
if (m_handle) {
if (m_handle->client() == this)
m_handle->setClient(0);
m_handle = 0;
}
m_resourceData = 0;
m_deferredRequest = ResourceRequest();
}
bool ResourceLoader::init(const ResourceRequest& r)
{
ASSERT(!m_handle);
ASSERT(m_request.isNull());
ASSERT(m_deferredRequest.isNull());
ASSERT(!m_documentLoader->isSubstituteLoadPending(this));
ResourceRequest clientRequest(r);
#if PLATFORM(IOS)
if (!m_documentLoader->frame()) {
cancel();
return false;
}
#endif
m_defersLoading = m_frame->page()->defersLoading();
if (m_options.securityCheck == DoSecurityCheck && !m_frame->document()->securityOrigin()->canDisplay(clientRequest.url())) {
FrameLoader::reportLocalLoadFailed(m_frame.get(), clientRequest.url().string());
releaseResources();
return false;
}
if (clientRequest.firstPartyForCookies().isNull()) {
if (Document* document = m_frame->document())
clientRequest.setFirstPartyForCookies(document->firstPartyForCookies());
}
willSendRequest(clientRequest, ResourceResponse());
#if PLATFORM(IOS)
if (m_reachedTerminalState)
return false;
#endif
if (clientRequest.isNull()) {
cancel();
return false;
}
m_originalRequest = m_request = clientRequest;
return true;
}
void ResourceLoader::start()
{
ASSERT(!m_handle);
ASSERT(!m_request.isNull());
ASSERT(m_deferredRequest.isNull());
#if ENABLE(WEB_ARCHIVE) || ENABLE(MHTML)
if (m_documentLoader->scheduleArchiveLoad(this, m_request))
return;
#endif
if (m_documentLoader->applicationCacheHost()->maybeLoadResource(this, m_request, m_request.url()))
return;
if (m_defersLoading) {
m_deferredRequest = m_request;
return;
}
if (!m_reachedTerminalState)
m_handle = ResourceHandle::create(m_frame->loader()->networkingContext(), m_request, this, m_defersLoading, m_options.sniffContent == SniffContent);
}
void ResourceLoader::setDefersLoading(bool defers)
{
m_defersLoading = defers;
if (m_handle)
m_handle->setDefersLoading(defers);
if (!defers && !m_deferredRequest.isNull()) {
m_request = m_deferredRequest;
m_deferredRequest = ResourceRequest();
start();
}
}
FrameLoader* ResourceLoader::frameLoader() const
{
if (!m_frame)
return 0;
return m_frame->loader();
}
void ResourceLoader::setDataBufferingPolicy(DataBufferingPolicy dataBufferingPolicy)
{
m_options.dataBufferingPolicy = dataBufferingPolicy;
if (dataBufferingPolicy == DoNotBufferData)
m_resourceData = 0;
}
void ResourceLoader::addDataOrBuffer(const char* data, int length, SharedBuffer* buffer, DataPayloadType dataPayloadType)
{
if (m_options.dataBufferingPolicy == DoNotBufferData)
return;
if (dataPayloadType == DataPayloadWholeResource) {
m_resourceData = buffer ? ResourceBuffer::adoptSharedBuffer(buffer) : ResourceBuffer::create(data, length);
return;
}
if (!m_resourceData)
m_resourceData = buffer ? ResourceBuffer::adoptSharedBuffer(buffer) : ResourceBuffer::create(data, length);
else {
if (buffer)
m_resourceData->append(buffer);
else
m_resourceData->append(data, length);
}
}
void ResourceLoader::clearResourceData()
{
if (m_resourceData)
m_resourceData->clear();
}
bool ResourceLoader::isSubresourceLoader()
{
return false;
}
void ResourceLoader::willSendRequest(ResourceRequest& request, const ResourceResponse& redirectResponse)
{
RefPtr<ResourceLoader> protector(this);
ASSERT(!m_reachedTerminalState);
#if PLATFORM(IOS)
if (!m_identifier) {
m_identifier = m_frame->page()->progress()->createUniqueIdentifier();
frameLoader()->notifier()->assignIdentifierToInitialRequest(m_identifier, documentLoader(), request);
if (m_reachedTerminalState)
return;
}
#endif
bool createdResourceIdentifier = false;
if (!m_identifier) {
m_identifier = m_frame->page()->progress()->createUniqueIdentifier();
createdResourceIdentifier = true;
}
if (m_options.sendLoadCallbacks == SendCallbacks) {
if (createdResourceIdentifier)
frameLoader()->notifier()->assignIdentifierToInitialRequest(m_identifier, documentLoader(), request);
frameLoader()->notifier()->willSendRequest(this, request, redirectResponse);
}
#if ENABLE(INSPECTOR)
else
InspectorInstrumentation::willSendRequest(m_frame.get(), m_identifier, m_frame->loader()->documentLoader(), request, redirectResponse);
#endif
if (!redirectResponse.isNull())
platformStrategies()->loaderStrategy()->resourceLoadScheduler()->crossOriginRedirectReceived(this, request.url());
m_request = request;
if (!redirectResponse.isNull() && !m_documentLoader->isCommitted())
frameLoader()->client()->dispatchDidReceiveServerRedirectForProvisionalLoad();
}
void ResourceLoader::didSendData(unsigned long long, unsigned long long)
{
}
void ResourceLoader::didReceiveResponse(const ResourceResponse& r)
{
ASSERT(!m_reachedTerminalState);
RefPtr<ResourceLoader> protector(this);
m_response = r;
if (FormData* data = m_request.httpBody())
data->removeGeneratedFilesIfNeeded();
if (m_options.sendLoadCallbacks == SendCallbacks)
frameLoader()->notifier()->didReceiveResponse(this, m_response);
}
void ResourceLoader::didReceiveData(const char* data, int length, long long encodedDataLength, DataPayloadType dataPayloadType)
{
didReceiveDataOrBuffer(data, length, 0, encodedDataLength, dataPayloadType);
}
void ResourceLoader::didReceiveBuffer(PassRefPtr<SharedBuffer> buffer, long long encodedDataLength, DataPayloadType dataPayloadType)
{
didReceiveDataOrBuffer(0, 0, buffer, encodedDataLength, dataPayloadType);
}
void ResourceLoader::didReceiveDataOrBuffer(const char* data, int length, PassRefPtr<SharedBuffer> prpBuffer, long long encodedDataLength, DataPayloadType dataPayloadType)
{
ASSERT(!prpBuffer || (!data && !length));
RefPtr<ResourceLoader> protector(this);
RefPtr<SharedBuffer> buffer = prpBuffer;
addDataOrBuffer(data, length, buffer.get(), dataPayloadType);
if (m_options.sendLoadCallbacks == SendCallbacks && m_frame)
frameLoader()->notifier()->didReceiveData(this, buffer ? buffer->data() : data, buffer ? buffer->size() : length, static_cast<int>(encodedDataLength));
}
void ResourceLoader::willStopBufferingData(const char* data, int length)
{
if (m_options.dataBufferingPolicy == DoNotBufferData)
return;
ASSERT(!m_resourceData);
m_resourceData = ResourceBuffer::create(data, length);
}
void ResourceLoader::didFinishLoading(double finishTime)
{
didFinishLoadingOnePart(finishTime);
if (wasCancelled())
return;
releaseResources();
}
void ResourceLoader::didFinishLoadingOnePart(double finishTime)
{
if (wasCancelled())
return;
ASSERT(!m_reachedTerminalState);
if (m_notifiedLoadComplete)
return;
m_notifiedLoadComplete = true;
if (m_options.sendLoadCallbacks == SendCallbacks)
frameLoader()->notifier()->didFinishLoad(this, finishTime);
}
void ResourceLoader::didFail(const ResourceError& error)
{
if (wasCancelled())
return;
ASSERT(!m_reachedTerminalState);
RefPtr<ResourceLoader> protector(this);
cleanupForError(error);
releaseResources();
}
void ResourceLoader::cleanupForError(const ResourceError& error)
{
if (FormData* data = m_request.httpBody())
data->removeGeneratedFilesIfNeeded();
if (m_notifiedLoadComplete)
return;
m_notifiedLoadComplete = true;
if (m_options.sendLoadCallbacks == SendCallbacks && m_identifier)
frameLoader()->notifier()->didFailToLoad(this, error);
}
void ResourceLoader::didChangePriority(ResourceLoadPriority loadPriority)
{
if (handle()) {
frameLoader()->client()->dispatchDidChangeResourcePriority(identifier(), loadPriority);
handle()->didChangePriority(loadPriority);
}
}
void ResourceLoader::cancel()
{
cancel(ResourceError());
}
void ResourceLoader::cancel(const ResourceError& error)
{
if (m_reachedTerminalState)
return;
ResourceError nonNullError = error.isNull() ? cancelledError() : error;
RefPtr<ResourceLoader> protector(this);
if (m_cancellationStatus == NotCancelled) {
m_cancellationStatus = CalledWillCancel;
willCancel(nonNullError);
}
if (m_cancellationStatus == CalledWillCancel) {
m_cancellationStatus = Cancelled;
if (m_handle)
m_handle->clearAuthentication();
m_documentLoader->cancelPendingSubstituteLoad(this);
if (m_handle) {
m_handle->cancel();
m_handle = 0;
}
cleanupForError(nonNullError);
}
if (m_reachedTerminalState)
return;
didCancel(nonNullError);
if (m_cancellationStatus == FinishedCancel)
return;
m_cancellationStatus = FinishedCancel;
releaseResources();
}
ResourceError ResourceLoader::cancelledError()
{
return frameLoader()->cancelledError(m_request);
}
ResourceError ResourceLoader::blockedError()
{
return frameLoader()->client()->blockedError(m_request);
}
ResourceError ResourceLoader::cannotShowURLError()
{
return frameLoader()->client()->cannotShowURLError(m_request);
}
void ResourceLoader::willSendRequest(ResourceHandle*, ResourceRequest& request, const ResourceResponse& redirectResponse)
{
if (documentLoader()->applicationCacheHost()->maybeLoadFallbackForRedirect(this, request, redirectResponse))
return;
willSendRequest(request, redirectResponse);
}
void ResourceLoader::didSendData(ResourceHandle*, unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
{
didSendData(bytesSent, totalBytesToBeSent);
}
void ResourceLoader::didReceiveResponse(ResourceHandle*, const ResourceResponse& response)
{
if (documentLoader()->applicationCacheHost()->maybeLoadFallbackForResponse(this, response))
return;
didReceiveResponse(response);
}
void ResourceLoader::didReceiveData(ResourceHandle*, const char* data, int length, int encodedDataLength)
{
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willReceiveResourceData(m_frame.get(), identifier(), encodedDataLength);
didReceiveData(data, length, encodedDataLength, DataPayloadBytes);
InspectorInstrumentation::didReceiveResourceData(cookie);
}
void ResourceLoader::didReceiveBuffer(ResourceHandle*, PassRefPtr<SharedBuffer> buffer, int encodedDataLength)
{
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willReceiveResourceData(m_frame.get(), identifier(), encodedDataLength);
didReceiveBuffer(buffer, encodedDataLength, DataPayloadBytes);
InspectorInstrumentation::didReceiveResourceData(cookie);
}
void ResourceLoader::didFinishLoading(ResourceHandle*, double finishTime)
{
didFinishLoading(finishTime);
}
void ResourceLoader::didFail(ResourceHandle*, const ResourceError& error)
{
if (documentLoader()->applicationCacheHost()->maybeLoadFallbackForError(this, error))
return;
didFail(error);
}
void ResourceLoader::wasBlocked(ResourceHandle*)
{
didFail(blockedError());
}
void ResourceLoader::cannotShowURL(ResourceHandle*)
{
didFail(cannotShowURLError());
}
bool ResourceLoader::shouldUseCredentialStorage()
{
if (m_options.allowCredentials == DoNotAllowStoredCredentials)
return false;
RefPtr<ResourceLoader> protector(this);
return frameLoader()->client()->shouldUseCredentialStorage(documentLoader(), identifier());
}
void ResourceLoader::didReceiveAuthenticationChallenge(const AuthenticationChallenge& challenge)
{
ASSERT(handle()->hasAuthenticationChallenge());
RefPtr<ResourceLoader> protector(this);
if (m_options.allowCredentials == AllowStoredCredentials) {
if (m_options.clientCredentialPolicy == AskClientForAllCredentials || (m_options.clientCredentialPolicy == DoNotAskClientForCrossOriginCredentials && m_frame->document()->securityOrigin()->canRequest(originalRequest().url()))) {
frameLoader()->notifier()->didReceiveAuthenticationChallenge(this, challenge);
return;
}
}
#if PLATFORM(MAC) || USE(CFNETWORK) || USE(CURL) || PLATFORM(GTK) || PLATFORM(EFL)
challenge.authenticationClient()->receivedRequestToContinueWithoutCredential(challenge);
ASSERT(!handle() || !handle()->hasAuthenticationChallenge());
#else
didFail(blockedError());
#endif
}
void ResourceLoader::didCancelAuthenticationChallenge(const AuthenticationChallenge& challenge)
{
RefPtr<ResourceLoader> protector(this);
frameLoader()->notifier()->didCancelAuthenticationChallenge(this, challenge);
}
#if USE(PROTECTION_SPACE_AUTH_CALLBACK)
bool ResourceLoader::canAuthenticateAgainstProtectionSpace(const ProtectionSpace& protectionSpace)
{
RefPtr<ResourceLoader> protector(this);
return frameLoader()->client()->canAuthenticateAgainstProtectionSpace(documentLoader(), identifier(), protectionSpace);
}
#endif
#if PLATFORM(IOS)
RetainPtr<CFDictionaryRef> ResourceLoader::connectionProperties()
{
return frameLoader()->connectionProperties(this);
}
#endif
void ResourceLoader::receivedCancellation(const AuthenticationChallenge&)
{
cancel();
}
}