CrossOriginPreflightChecker.cpp [plain text]
#include "config.h"
#include "CrossOriginPreflightChecker.h"
#include "CachedRawResource.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "ContentSecurityPolicy.h"
#include "CrossOriginAccessControl.h"
#include "CrossOriginPreflightResultCache.h"
#include "DocumentThreadableLoader.h"
#include "InspectorInstrumentation.h"
#include "RuntimeEnabledFeatures.h"
#include "ThreadableLoaderClient.h"
namespace WebCore {
CrossOriginPreflightChecker::CrossOriginPreflightChecker(DocumentThreadableLoader& loader, ResourceRequest&& request)
: m_loader(loader)
, m_request(WTFMove(request))
{
}
CrossOriginPreflightChecker::~CrossOriginPreflightChecker()
{
if (m_resource)
m_resource->removeClient(this);
}
void CrossOriginPreflightChecker::validatePreflightResponse(DocumentThreadableLoader& loader, ResourceRequest&& request, unsigned long identifier, const ResourceResponse& response)
{
Frame* frame = loader.document().frame();
ASSERT(frame);
auto cookie = InspectorInstrumentation::willReceiveResourceResponse(frame);
InspectorInstrumentation::didReceiveResourceResponse(cookie, identifier, frame->loader().documentLoader(), response, 0);
if (!response.isSuccessful()) {
loader.preflightFailure(identifier, ResourceError(errorDomainWebKitInternal, 0, request.url(), ASCIILiteral("Preflight response is not successful"), ResourceError::Type::AccessControl));
return;
}
String description;
if (!passesAccessControlCheck(response, loader.options().allowCredentials(), loader.securityOrigin(), description)) {
loader.preflightFailure(identifier, ResourceError(errorDomainWebKitInternal, 0, request.url(), description, ResourceError::Type::AccessControl));
return;
}
auto result = std::make_unique<CrossOriginPreflightResultCacheItem>(loader.options().allowCredentials());
if (!result->parse(response, description)
|| !result->allowsCrossOriginMethod(request.httpMethod(), description)
|| !result->allowsCrossOriginHeaders(request.httpHeaderFields(), description)) {
loader.preflightFailure(identifier, ResourceError(errorDomainWebKitInternal, 0, request.url(), description, ResourceError::Type::AccessControl));
return;
}
CrossOriginPreflightResultCache::singleton().appendEntry(loader.securityOrigin().toString(), request.url(), WTFMove(result));
loader.preflightSuccess(WTFMove(request));
}
void CrossOriginPreflightChecker::notifyFinished(CachedResource* resource)
{
ASSERT_UNUSED(resource, resource == m_resource);
if (m_resource->loadFailedOrCanceled()) {
ResourceError preflightError = m_resource->resourceError();
preflightError.setType(ResourceError::Type::AccessControl);
m_loader.preflightFailure(m_resource->identifier(), preflightError);
return;
}
validatePreflightResponse(m_loader, WTFMove(m_request), m_resource->identifier(), m_resource->response());
}
void CrossOriginPreflightChecker::startPreflight()
{
auto options = m_loader.options();
options.setClientCredentialPolicy(DoNotAskClientForCrossOriginCredentials);
options.setSecurityCheck(DoSecurityCheck);
options.setSendLoadCallbacks(DoNotSendCallbacks);
options.setSniffContent(DoNotSniffContent);
options.setDataBufferingPolicy(BufferData);
options.redirect = FetchOptions::Redirect::Manual;
CachedResourceRequest preflightRequest(createAccessControlPreflightRequest(m_request, m_loader.securityOrigin()), options);
if (RuntimeEnabledFeatures::sharedFeatures().resourceTimingEnabled())
preflightRequest.setInitiator(m_loader.options().initiator);
ASSERT(!m_resource);
m_resource = m_loader.document().cachedResourceLoader().requestRawResource(preflightRequest);
if (m_resource)
m_resource->addClient(this);
}
void CrossOriginPreflightChecker::doPreflight(DocumentThreadableLoader& loader, ResourceRequest&& request)
{
if (!loader.document().frame())
return;
ResourceRequest preflightRequest = createAccessControlPreflightRequest(request, loader.securityOrigin());
ResourceError error;
ResourceResponse response;
RefPtr<SharedBuffer> data;
unsigned identifier = loader.document().frame()->loader().loadResourceSynchronously(preflightRequest, DoNotAllowStoredCredentials, DoNotAskClientForCrossOriginCredentials, error, response, data);
if (!error.isNull() && response.httpStatusCode() <= 0) {
error.setType(ResourceError::Type::AccessControl);
loader.preflightFailure(identifier, error);
return;
}
validatePreflightResponse(loader, WTFMove(request), identifier, response);
}
void CrossOriginPreflightChecker::setDefersLoading(bool value)
{
if (m_resource)
m_resource->setDefersLoading(value);
}
bool CrossOriginPreflightChecker::isXMLHttpRequest() const
{
return m_loader.isXMLHttpRequest();
}
}