DocumentThreadableLoader.cpp [plain text]
#include "config.h"
#include "DocumentThreadableLoader.h"
#include "AuthenticationChallenge.h"
#include "CrossOriginAccessControl.h"
#include "CrossOriginPreflightResultCache.h"
#include "Document.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "ResourceRequest.h"
#include "SecurityOrigin.h"
#include "SubresourceLoader.h"
#include "ThreadableLoaderClient.h"
namespace WebCore {
void DocumentThreadableLoader::loadResourceSynchronously(Document* document, const ResourceRequest& request, ThreadableLoaderClient& client, const ThreadableLoaderOptions& options)
{
RefPtr<DocumentThreadableLoader> loader = adoptRef(new DocumentThreadableLoader(document, &client, LoadSynchronously, request, options));
ASSERT(loader->hasOneRef());
}
PassRefPtr<DocumentThreadableLoader> DocumentThreadableLoader::create(Document* document, ThreadableLoaderClient* client, const ResourceRequest& request, const ThreadableLoaderOptions& options)
{
RefPtr<DocumentThreadableLoader> loader = adoptRef(new DocumentThreadableLoader(document, client, LoadAsynchronously, request, options));
if (!loader->m_loader)
loader = 0;
return loader.release();
}
DocumentThreadableLoader::DocumentThreadableLoader(Document* document, ThreadableLoaderClient* client, BlockingBehavior blockingBehavior, const ResourceRequest& request, const ThreadableLoaderOptions& options)
: m_client(client)
, m_document(document)
, m_options(options)
, m_sameOriginRequest(document->securityOrigin()->canRequest(request.url()))
, m_async(blockingBehavior == LoadAsynchronously)
{
ASSERT(document);
ASSERT(client);
if (m_sameOriginRequest || m_options.crossOriginRequestPolicy == AllowCrossOriginRequests) {
loadRequest(request, DoSecurityCheck);
return;
}
if (m_options.crossOriginRequestPolicy == DenyCrossOriginRequests) {
m_client->didFail(ResourceError());
return;
}
ASSERT(m_options.crossOriginRequestPolicy == UseAccessControl);
OwnPtr<ResourceRequest> crossOriginRequest(new ResourceRequest(request));
crossOriginRequest->removeCredentials();
crossOriginRequest->setAllowCookies(m_options.allowCredentials);
if (!m_options.forcePreflight && isSimpleCrossOriginAccessRequest(crossOriginRequest->httpMethod(), crossOriginRequest->httpHeaderFields()))
makeSimpleCrossOriginAccessRequest(*crossOriginRequest);
else {
m_actualRequest.set(crossOriginRequest.release());
if (CrossOriginPreflightResultCache::shared().canSkipPreflight(document->securityOrigin()->toString(), m_actualRequest->url(), m_options.allowCredentials, m_actualRequest->httpMethod(), m_actualRequest->httpHeaderFields()))
preflightSuccess();
else
makeCrossOriginAccessRequestWithPreflight(*m_actualRequest);
}
}
void DocumentThreadableLoader::makeSimpleCrossOriginAccessRequest(const ResourceRequest& request)
{
ASSERT(isSimpleCrossOriginAccessRequest(request.httpMethod(), request.httpHeaderFields()));
if (!request.url().protocolInHTTPFamily()) {
m_client->didFail(ResourceError());
return;
}
ResourceRequest crossOriginRequest(request);
crossOriginRequest.setHTTPOrigin(m_document->securityOrigin()->toString());
loadRequest(crossOriginRequest, DoSecurityCheck);
}
void DocumentThreadableLoader::makeCrossOriginAccessRequestWithPreflight(const ResourceRequest& request)
{
ResourceRequest preflightRequest(request.url());
preflightRequest.removeCredentials();
preflightRequest.setHTTPOrigin(m_document->securityOrigin()->toString());
preflightRequest.setAllowCookies(m_options.allowCredentials);
preflightRequest.setHTTPMethod("OPTIONS");
preflightRequest.setHTTPHeaderField("Access-Control-Request-Method", request.httpMethod());
const HTTPHeaderMap& requestHeaderFields = request.httpHeaderFields();
if (requestHeaderFields.size() > 0) {
Vector<UChar> headerBuffer;
HTTPHeaderMap::const_iterator it = requestHeaderFields.begin();
append(headerBuffer, it->first);
++it;
HTTPHeaderMap::const_iterator end = requestHeaderFields.end();
for (; it != end; ++it) {
headerBuffer.append(',');
headerBuffer.append(' ');
append(headerBuffer, it->first);
}
preflightRequest.setHTTPHeaderField("Access-Control-Request-Headers", String::adopt(headerBuffer));
}
loadRequest(preflightRequest, DoSecurityCheck);
}
DocumentThreadableLoader::~DocumentThreadableLoader()
{
if (m_loader)
m_loader->clearClient();
}
void DocumentThreadableLoader::cancel()
{
if (!m_loader)
return;
m_loader->cancel();
m_loader->clearClient();
m_loader = 0;
m_client = 0;
}
void DocumentThreadableLoader::willSendRequest(SubresourceLoader* loader, ResourceRequest& request, const ResourceResponse&)
{
ASSERT(m_client);
ASSERT_UNUSED(loader, loader == m_loader);
if (!isAllowedRedirect(request.url())) {
RefPtr<DocumentThreadableLoader> protect(this);
m_client->didFailRedirectCheck();
request = ResourceRequest();
}
}
void DocumentThreadableLoader::didSendData(SubresourceLoader* loader, unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
{
ASSERT(m_client);
ASSERT_UNUSED(loader, loader == m_loader);
m_client->didSendData(bytesSent, totalBytesToBeSent);
}
void DocumentThreadableLoader::didReceiveResponse(SubresourceLoader* loader, const ResourceResponse& response)
{
ASSERT(m_client);
ASSERT_UNUSED(loader, loader == m_loader);
if (m_actualRequest) {
if (!passesAccessControlCheck(response, m_options.allowCredentials, m_document->securityOrigin())) {
preflightFailure();
return;
}
OwnPtr<CrossOriginPreflightResultCacheItem> preflightResult(new CrossOriginPreflightResultCacheItem(m_options.allowCredentials));
if (!preflightResult->parse(response)
|| !preflightResult->allowsCrossOriginMethod(m_actualRequest->httpMethod())
|| !preflightResult->allowsCrossOriginHeaders(m_actualRequest->httpHeaderFields())) {
preflightFailure();
return;
}
CrossOriginPreflightResultCache::shared().appendEntry(m_document->securityOrigin()->toString(), m_actualRequest->url(), preflightResult.release());
} else {
if (!m_sameOriginRequest && m_options.crossOriginRequestPolicy == UseAccessControl) {
if (!passesAccessControlCheck(response, m_options.allowCredentials, m_document->securityOrigin())) {
m_client->didFail(ResourceError());
return;
}
}
m_client->didReceiveResponse(response);
}
}
void DocumentThreadableLoader::didReceiveData(SubresourceLoader* loader, const char* data, int lengthReceived)
{
ASSERT(m_client);
ASSERT_UNUSED(loader, loader == m_loader);
if (m_actualRequest)
return;
m_client->didReceiveData(data, lengthReceived);
}
void DocumentThreadableLoader::didFinishLoading(SubresourceLoader* loader)
{
ASSERT(loader == m_loader);
ASSERT(m_client);
didFinishLoading(loader->identifier());
}
void DocumentThreadableLoader::didFinishLoading(unsigned long identifier)
{
if (m_actualRequest) {
ASSERT(!m_sameOriginRequest);
ASSERT(m_options.crossOriginRequestPolicy == UseAccessControl);
preflightSuccess();
} else
m_client->didFinishLoading(identifier);
}
void DocumentThreadableLoader::didFail(SubresourceLoader* loader, const ResourceError& error)
{
ASSERT(m_client);
ASSERT_UNUSED(loader, loader == m_loader || !m_loader);
m_client->didFail(error);
}
bool DocumentThreadableLoader::getShouldUseCredentialStorage(SubresourceLoader* loader, bool& shouldUseCredentialStorage)
{
ASSERT_UNUSED(loader, loader == m_loader || !m_loader);
if (!m_options.allowCredentials) {
shouldUseCredentialStorage = false;
return true;
}
return false; }
void DocumentThreadableLoader::didReceiveAuthenticationChallenge(SubresourceLoader* loader, const AuthenticationChallenge&)
{
ASSERT(loader == m_loader);
if (!m_sameOriginRequest) {
RefPtr<DocumentThreadableLoader> protect(this);
m_client->didFail(loader->blockedError());
cancel();
}
}
void DocumentThreadableLoader::receivedCancellation(SubresourceLoader* loader, const AuthenticationChallenge& challenge)
{
ASSERT(m_client);
ASSERT_UNUSED(loader, loader == m_loader);
m_client->didReceiveAuthenticationCancellation(challenge.failureResponse());
}
void DocumentThreadableLoader::preflightSuccess()
{
OwnPtr<ResourceRequest> actualRequest;
actualRequest.swap(m_actualRequest);
loadRequest(*actualRequest, SkipSecurityCheck);
}
void DocumentThreadableLoader::preflightFailure()
{
m_actualRequest = 0; m_client->didFail(ResourceError());
}
void DocumentThreadableLoader::loadRequest(const ResourceRequest& request, SecurityCheckPolicy securityCheck)
{
const KURL& requestURL = request.url();
ASSERT(m_sameOriginRequest || requestURL.user().isEmpty());
ASSERT(m_sameOriginRequest || requestURL.pass().isEmpty());
if (m_async) {
bool sendLoadCallbacks = m_options.sendLoadCallbacks && !m_actualRequest;
bool sniffContent = m_options.sniffContent && !m_actualRequest;
m_loader = 0;
m_loader = SubresourceLoader::create(m_document->frame(), this, request, securityCheck, sendLoadCallbacks, sniffContent);
return;
}
StoredCredentials storedCredentials = m_options.allowCredentials ? AllowStoredCredentials : DoNotAllowStoredCredentials;
Vector<char> data;
ResourceError error;
ResourceResponse response;
unsigned long identifier = std::numeric_limits<unsigned long>::max();
if (m_document->frame())
identifier = m_document->frame()->loader()->loadResourceSynchronously(request, storedCredentials, error, response, data);
if (!error.isNull() && !requestURL.isLocalFile() && response.httpStatusCode() <= 0) {
m_client->didFail(error);
return;
}
if (requestURL != response.url() && !isAllowedRedirect(response.url())) {
m_client->didFailRedirectCheck();
return;
}
didReceiveResponse(0, response);
const char* bytes = static_cast<const char*>(data.data());
int len = static_cast<int>(data.size());
didReceiveData(0, bytes, len);
didFinishLoading(identifier);
}
bool DocumentThreadableLoader::isAllowedRedirect(const KURL& url)
{
if (m_options.crossOriginRequestPolicy == AllowCrossOriginRequests)
return true;
return m_sameOriginRequest && m_document->securityOrigin()->canRequest(url);
}
}