DocumentThreadableLoader.cpp [plain text]
#include "config.h"
#include "DocumentThreadableLoader.h"
#include "CachedRawResource.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "CachedResourceRequestInitiators.h"
#include "ContentSecurityPolicy.h"
#include "CrossOriginAccessControl.h"
#include "CrossOriginPreflightChecker.h"
#include "CrossOriginPreflightResultCache.h"
#include "Document.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "InspectorInstrumentation.h"
#include "ProgressTracker.h"
#include "ResourceError.h"
#include "ResourceRequest.h"
#include "RuntimeEnabledFeatures.h"
#include "SchemeRegistry.h"
#include "SecurityOrigin.h"
#include "SubresourceLoader.h"
#include "ThreadableLoaderClient.h"
#include <wtf/Assertions.h>
#include <wtf/Ref.h>
namespace WebCore {
void DocumentThreadableLoader::loadResourceSynchronously(Document& document, const ResourceRequest& request, ThreadableLoaderClient& client, const ThreadableLoaderOptions& options, RefPtr<SecurityOrigin>&& origin, std::unique_ptr<ContentSecurityPolicy>&& contentSecurityPolicy)
{
RefPtr<DocumentThreadableLoader> loader = adoptRef(new DocumentThreadableLoader(document, client, LoadSynchronously, request, options, WTFMove(origin), WTFMove(contentSecurityPolicy)));
ASSERT(loader->hasOneRef());
}
void DocumentThreadableLoader::loadResourceSynchronously(Document& document, const ResourceRequest& request, ThreadableLoaderClient& client, const ThreadableLoaderOptions& options)
{
loadResourceSynchronously(document, request, client, options, nullptr, nullptr);
}
RefPtr<DocumentThreadableLoader> DocumentThreadableLoader::create(Document& document, ThreadableLoaderClient& client, const ResourceRequest& request, const ThreadableLoaderOptions& options, RefPtr<SecurityOrigin>&& origin, std::unique_ptr<ContentSecurityPolicy>&& contentSecurityPolicy)
{
RefPtr<DocumentThreadableLoader> loader = adoptRef(new DocumentThreadableLoader(document, client, LoadAsynchronously, request, options, WTFMove(origin), WTFMove(contentSecurityPolicy)));
if (!loader->isLoading())
loader = nullptr;
return loader;
}
RefPtr<DocumentThreadableLoader> DocumentThreadableLoader::create(Document& document, ThreadableLoaderClient& client, const ResourceRequest& request, const ThreadableLoaderOptions& options)
{
return create(document, client, request, options, nullptr, nullptr);
}
DocumentThreadableLoader::DocumentThreadableLoader(Document& document, ThreadableLoaderClient& client, BlockingBehavior blockingBehavior, const ResourceRequest& request, const ThreadableLoaderOptions& options, RefPtr<SecurityOrigin>&& origin, std::unique_ptr<ContentSecurityPolicy>&& contentSecurityPolicy)
: m_client(&client)
, m_document(document)
, m_options(options)
, m_origin(WTFMove(origin))
, m_sameOriginRequest(securityOrigin().canRequest(request.url()))
, m_simpleRequest(true)
, m_async(blockingBehavior == LoadAsynchronously)
, m_contentSecurityPolicy(WTFMove(contentSecurityPolicy))
{
ASSERT(m_async || request.httpReferrer().isEmpty());
ASSERT_WITH_SECURITY_IMPLICATION(isAllowedByContentSecurityPolicy(request.url()));
if (m_sameOriginRequest || m_options.crossOriginRequestPolicy == AllowCrossOriginRequests) {
loadRequest(request, DoSecurityCheck);
return;
}
if (m_options.crossOriginRequestPolicy == DenyCrossOriginRequests) {
m_client->didFail(ResourceError(errorDomainWebKitInternal, 0, request.url(), "Cross origin requests are not supported."));
return;
}
makeCrossOriginAccessRequest(request);
}
void DocumentThreadableLoader::makeCrossOriginAccessRequest(const ResourceRequest& request)
{
ASSERT(m_options.crossOriginRequestPolicy == UseAccessControl);
auto crossOriginRequest = request;
updateRequestForAccessControl(crossOriginRequest, securityOrigin(), m_options.allowCredentials());
if ((m_options.preflightPolicy == ConsiderPreflight && isSimpleCrossOriginAccessRequest(crossOriginRequest.httpMethod(), crossOriginRequest.httpHeaderFields())) || m_options.preflightPolicy == PreventPreflight)
makeSimpleCrossOriginAccessRequest(crossOriginRequest);
else {
m_simpleRequest = false;
if (CrossOriginPreflightResultCache::singleton().canSkipPreflight(securityOrigin().toString(), crossOriginRequest.url(), m_options.allowCredentials(), crossOriginRequest.httpMethod(), crossOriginRequest.httpHeaderFields()))
preflightSuccess(WTFMove(crossOriginRequest));
else
makeCrossOriginAccessRequestWithPreflight(WTFMove(crossOriginRequest));
}
}
void DocumentThreadableLoader::makeSimpleCrossOriginAccessRequest(const ResourceRequest& request)
{
ASSERT(m_options.preflightPolicy != ForcePreflight);
ASSERT(m_options.preflightPolicy == PreventPreflight || isSimpleCrossOriginAccessRequest(request.httpMethod(), request.httpHeaderFields()));
if (!SchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(request.url().protocol())) {
m_client->didFail(ResourceError(errorDomainWebKitInternal, 0, request.url(), "Cross origin requests are only supported for HTTP.", ResourceError::Type::AccessControl));
return;
}
loadRequest(request, DoSecurityCheck);
}
void DocumentThreadableLoader::makeCrossOriginAccessRequestWithPreflight(ResourceRequest&& request)
{
if (m_async) {
m_preflightChecker = CrossOriginPreflightChecker(*this, WTFMove(request));
m_preflightChecker->startPreflight();
return;
}
CrossOriginPreflightChecker::doPreflight(*this, WTFMove(request));
}
DocumentThreadableLoader::~DocumentThreadableLoader()
{
if (m_resource)
m_resource->removeClient(this);
}
void DocumentThreadableLoader::cancel()
{
Ref<DocumentThreadableLoader> protectedThis(*this);
if (m_client && m_resource) {
ResourceError error(errorDomainWebKitInternal, 0, m_resource->url(), "Load cancelled", ResourceError::Type::Cancellation);
didFail(m_resource->identifier(), error);
}
clearResource();
m_client = nullptr;
}
void DocumentThreadableLoader::setDefersLoading(bool value)
{
if (m_resource)
m_resource->setDefersLoading(value);
if (m_preflightChecker)
m_preflightChecker->setDefersLoading(value);
}
void DocumentThreadableLoader::clearResource()
{
if (CachedResourceHandle<CachedRawResource> resource = m_resource) {
m_resource = nullptr;
resource->removeClient(this);
}
if (m_preflightChecker)
m_preflightChecker = Nullopt;
}
static inline void reportContentSecurityPolicyError(ThreadableLoaderClient& client, const URL& url)
{
client.didFail(ResourceError(errorDomainWebKitInternal, 0, url, "Cross-origin redirection denied by Content Security Policy.", ResourceError::Type::AccessControl));
}
static inline void reportCrossOriginResourceSharingError(ThreadableLoaderClient& client, const URL& url)
{
client.didFail(ResourceError(errorDomainWebKitInternal, 0, url, "Cross-origin redirection denied by Cross-Origin Resource Sharing policy.", ResourceError::Type::AccessControl));
}
void DocumentThreadableLoader::redirectReceived(CachedResource* resource, ResourceRequest& request, const ResourceResponse& redirectResponse)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, resource == m_resource);
Ref<DocumentThreadableLoader> protectedThis(*this);
if (!isAllowedByContentSecurityPolicy(request.url(), !redirectResponse.isNull())) {
reportContentSecurityPolicyError(*m_client, redirectResponse.url());
request = ResourceRequest();
return;
}
if (isAllowedRedirect(request.url()))
return;
if (m_options.crossOriginRequestPolicy == UseAccessControl) {
bool allowRedirect = false;
if (m_simpleRequest) {
String accessControlErrorDescription;
allowRedirect = isValidCrossOriginRedirectionURL(request.url())
&& (m_sameOriginRequest || passesAccessControlCheck(redirectResponse, m_options.allowCredentials(), securityOrigin(), accessControlErrorDescription));
}
if (allowRedirect) {
if (m_resource)
clearResource();
RefPtr<SecurityOrigin> originalOrigin = SecurityOrigin::createFromString(redirectResponse.url());
RefPtr<SecurityOrigin> requestOrigin = SecurityOrigin::createFromString(request.url());
if (!m_sameOriginRequest && !originalOrigin->isSameSchemeHostPort(requestOrigin.get()))
m_origin = SecurityOrigin::createUnique();
m_sameOriginRequest = false;
if (m_options.credentials == FetchOptions::Credentials::SameOrigin)
m_options.setAllowCredentials(DoNotAllowStoredCredentials);
cleanRedirectedRequestForAccessControl(request);
makeCrossOriginAccessRequest(request);
return;
}
}
reportCrossOriginResourceSharingError(*m_client, redirectResponse.url());
request = ResourceRequest();
}
void DocumentThreadableLoader::dataSent(CachedResource* resource, unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, resource == m_resource);
m_client->didSendData(bytesSent, totalBytesToBeSent);
}
void DocumentThreadableLoader::responseReceived(CachedResource* resource, const ResourceResponse& response)
{
ASSERT_UNUSED(resource, resource == m_resource);
didReceiveResponse(m_resource->identifier(), response);
}
void DocumentThreadableLoader::didReceiveResponse(unsigned long identifier, const ResourceResponse& response)
{
ASSERT(m_client);
String accessControlErrorDescription;
if (!m_sameOriginRequest && m_options.crossOriginRequestPolicy == UseAccessControl) {
if (!passesAccessControlCheck(response, m_options.allowCredentials(), securityOrigin(), accessControlErrorDescription)) {
m_client->didFail(ResourceError(errorDomainWebKitInternal, 0, response.url(), accessControlErrorDescription, ResourceError::Type::AccessControl));
return;
}
}
m_client->didReceiveResponse(identifier, response);
}
void DocumentThreadableLoader::dataReceived(CachedResource* resource, const char* data, int dataLength)
{
ASSERT_UNUSED(resource, resource == m_resource);
didReceiveData(m_resource->identifier(), data, dataLength);
}
void DocumentThreadableLoader::didReceiveData(unsigned long, const char* data, int dataLength)
{
ASSERT(m_client);
m_client->didReceiveData(data, dataLength);
}
void DocumentThreadableLoader::notifyFinished(CachedResource* resource)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, resource == m_resource);
if (m_resource->errorOccurred())
didFail(m_resource->identifier(), m_resource->resourceError());
else
didFinishLoading(m_resource->identifier(), m_resource->loadFinishTime());
}
void DocumentThreadableLoader::didFinishLoading(unsigned long identifier, double finishTime)
{
ASSERT(m_client);
m_client->didFinishLoading(identifier, finishTime);
}
void DocumentThreadableLoader::didFail(unsigned long, const ResourceError& error)
{
ASSERT(m_client);
m_client->didFail(error);
}
void DocumentThreadableLoader::preflightSuccess(ResourceRequest&& request)
{
ResourceRequest actualRequest(WTFMove(request));
actualRequest.setHTTPOrigin(securityOrigin().toString());
m_preflightChecker = Nullopt;
loadRequest(actualRequest, SkipSecurityCheck);
}
void DocumentThreadableLoader::preflightFailure(unsigned long identifier, const ResourceError& error)
{
ASSERT(error.isAccessControl());
m_preflightChecker = Nullopt;
InspectorInstrumentation::didFailLoading(m_document.frame(), m_document.frame()->loader().documentLoader(), identifier, error);
ASSERT(m_client);
m_client->didFail(error);
}
void DocumentThreadableLoader::loadRequest(const ResourceRequest& request, SecurityCheckPolicy securityCheck)
{
const URL& requestURL = request.url();
m_options.setSecurityCheck(securityCheck);
ASSERT(m_sameOriginRequest || requestURL.user().isEmpty());
ASSERT(m_sameOriginRequest || requestURL.pass().isEmpty());
if (m_async) {
ThreadableLoaderOptions options = m_options;
options.setClientCredentialPolicy(DoNotAskClientForCrossOriginCredentials);
CachedResourceRequest newRequest(request, options);
if (RuntimeEnabledFeatures::sharedFeatures().resourceTimingEnabled())
newRequest.setInitiator(m_options.initiator);
ASSERT(!m_resource);
m_resource = m_document.cachedResourceLoader().requestRawResource(newRequest);
if (m_resource)
m_resource->addClient(this);
return;
}
RefPtr<SharedBuffer> data;
ResourceError error;
ResourceResponse response;
unsigned long identifier = std::numeric_limits<unsigned long>::max();
if (m_document.frame()) {
auto& frameLoader = m_document.frame()->loader();
if (!frameLoader.mixedContentChecker().canRunInsecureContent(m_document.securityOrigin(), requestURL))
return;
identifier = frameLoader.loadResourceSynchronously(request, m_options.allowCredentials(), m_options.clientCredentialPolicy(), error, response, data);
}
if (!error.isNull() && response.httpStatusCode() <= 0) {
if (requestURL.isLocalFile()) {
didReceiveResponse(identifier, response);
didFinishLoading(identifier, 0.0);
return;
}
m_client->didFail(error);
return;
}
bool didRedirect = requestURL != response.url();
if (didRedirect) {
if (!isAllowedByContentSecurityPolicy(response.url(), didRedirect)) {
reportContentSecurityPolicyError(*m_client, requestURL);
return;
}
if (!isAllowedRedirect(response.url())) {
reportCrossOriginResourceSharingError(*m_client, requestURL);
return;
}
}
didReceiveResponse(identifier, response);
if (data)
didReceiveData(identifier, data->data(), data->size());
didFinishLoading(identifier, 0.0);
}
bool DocumentThreadableLoader::isAllowedByContentSecurityPolicy(const URL& url, bool didRedirect)
{
bool overrideContentSecurityPolicy = false;
ContentSecurityPolicy::RedirectResponseReceived redirectResponseReceived = didRedirect ? ContentSecurityPolicy::RedirectResponseReceived::Yes : ContentSecurityPolicy::RedirectResponseReceived::No;
switch (m_options.contentSecurityPolicyEnforcement) {
case ContentSecurityPolicyEnforcement::DoNotEnforce:
return true;
case ContentSecurityPolicyEnforcement::EnforceChildSrcDirective:
return contentSecurityPolicy().allowChildContextFromSource(url, overrideContentSecurityPolicy, redirectResponseReceived);
case ContentSecurityPolicyEnforcement::EnforceConnectSrcDirective:
return contentSecurityPolicy().allowConnectToSource(url, overrideContentSecurityPolicy, redirectResponseReceived);
case ContentSecurityPolicyEnforcement::EnforceScriptSrcDirective:
return contentSecurityPolicy().allowScriptFromSource(url, overrideContentSecurityPolicy, redirectResponseReceived);
}
ASSERT_NOT_REACHED();
return false;
}
bool DocumentThreadableLoader::isAllowedRedirect(const URL& url)
{
if (m_options.crossOriginRequestPolicy == AllowCrossOriginRequests)
return true;
return m_sameOriginRequest && securityOrigin().canRequest(url);
}
bool DocumentThreadableLoader::isXMLHttpRequest() const
{
return m_options.initiator == cachedResourceRequestInitiators().xmlhttprequest;
}
SecurityOrigin& DocumentThreadableLoader::securityOrigin() const
{
ASSERT(m_document.securityOrigin());
return m_origin ? *m_origin : *m_document.securityOrigin();
}
const ContentSecurityPolicy& DocumentThreadableLoader::contentSecurityPolicy() const
{
if (m_contentSecurityPolicy)
return *m_contentSecurityPolicy.get();
ASSERT(m_document.contentSecurityPolicy());
return *m_document.contentSecurityPolicy();
}
}