void DocumentThreadableLoader::makeCrossOriginAccessRequest(const ResourceRequest& request)
{
ASSERT(m_options.crossOriginRequestPolicy == UseAccessControl);
ASSERT(m_client);
ASSERT(!resource());
// Cross-origin requests are only allowed certain registered schemes.
// We would catch this when checking response headers later, but there
// is no reason to send a request, preflighted or not, that's guaranteed
// to be denied.
if (!SchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(request.url().protocol())) {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailAccessControlCheck(ResourceError(errorDomainBlinkInternal, 0, request.url().string(), "Cross origin requests are only supported for protocol schemes: " + SchemeRegistry::listOfCORSEnabledURLSchemes() + "."));
// |this| may be dead here in async mode.
return;
}
// We use isSimpleOrForbiddenRequest() here since |request| may have been
// modified in the process of loading (not from the user's input). For
// example, referrer. We need to accept them. For security, we must reject
// forbidden headers/methods at the point we accept user's input. Not here.
if ((m_options.preflightPolicy == ConsiderPreflight && FetchUtils::isSimpleOrForbiddenRequest(request.httpMethod(), request.httpHeaderFields())) || m_options.preflightPolicy == PreventPreflight) {
ResourceRequest crossOriginRequest(request);
ResourceLoaderOptions crossOriginOptions(m_resourceLoaderOptions);
updateRequestForAccessControl(crossOriginRequest, securityOrigin(), effectiveAllowCredentials());
// We update the credentials mode according to effectiveAllowCredentials() here for backward compatibility. But this is not correct.
// FIXME: We should set it in the caller of DocumentThreadableLoader.
crossOriginRequest.setFetchCredentialsMode(effectiveAllowCredentials() == AllowStoredCredentials ? WebURLRequest::FetchCredentialsModeInclude : WebURLRequest::FetchCredentialsModeOmit);
loadRequest(crossOriginRequest, crossOriginOptions);
} else {
m_crossOriginNonSimpleRequest = true;
ResourceRequest crossOriginRequest(request);
ResourceLoaderOptions crossOriginOptions(m_resourceLoaderOptions);
// Do not set the Origin header for preflight requests.
updateRequestForAccessControl(crossOriginRequest, 0, effectiveAllowCredentials());
// We update the credentials mode according to effectiveAllowCredentials() here for backward compatibility. But this is not correct.
// FIXME: We should set it in the caller of DocumentThreadableLoader.
crossOriginRequest.setFetchCredentialsMode(effectiveAllowCredentials() == AllowStoredCredentials ? WebURLRequest::FetchCredentialsModeInclude : WebURLRequest::FetchCredentialsModeOmit);
m_actualRequest = crossOriginRequest;
m_actualOptions = crossOriginOptions;
bool shouldForcePreflight = InspectorInstrumentation::shouldForceCORSPreflight(m_document);
bool canSkipPreflight = CrossOriginPreflightResultCache::shared().canSkipPreflight(securityOrigin()->toString(), m_actualRequest.url(), effectiveAllowCredentials(), m_actualRequest.httpMethod(), m_actualRequest.httpHeaderFields());
if (canSkipPreflight && !shouldForcePreflight) {
loadActualRequest();
} else {
ResourceRequest preflightRequest = createAccessControlPreflightRequest(m_actualRequest, securityOrigin());
// Create a ResourceLoaderOptions for preflight.
ResourceLoaderOptions preflightOptions = m_actualOptions;
preflightOptions.allowCredentials = DoNotAllowStoredCredentials;
loadRequest(preflightRequest, preflightOptions);
}
}
}
void DocumentThreadableLoader::handlePreflightResponse(const ResourceResponse& response)
{
String accessControlErrorDescription;
if (!passesAccessControlCheck(response, effectiveAllowCredentials(), securityOrigin(), accessControlErrorDescription, m_requestContext)) {
handlePreflightFailure(response.url().string(), "Response to preflight request doesn't pass access control check: " + accessControlErrorDescription);
// |this| may be dead here in async mode.
return;
}
if (!passesPreflightStatusCheck(response, accessControlErrorDescription)) {
handlePreflightFailure(response.url().string(), accessControlErrorDescription);
// |this| may be dead here in async mode.
return;
}
OwnPtr<CrossOriginPreflightResultCacheItem> preflightResult = adoptPtr(new CrossOriginPreflightResultCacheItem(effectiveAllowCredentials()));
if (!preflightResult->parse(response, accessControlErrorDescription)
|| !preflightResult->allowsCrossOriginMethod(m_actualRequest.httpMethod(), accessControlErrorDescription)
|| !preflightResult->allowsCrossOriginHeaders(m_actualRequest.httpHeaderFields(), accessControlErrorDescription)) {
handlePreflightFailure(response.url().string(), accessControlErrorDescription);
// |this| may be dead here in async mode.
return;
}
CrossOriginPreflightResultCache::shared().appendEntry(securityOrigin()->toString(), m_actualRequest.url(), preflightResult.release());
}
void DocumentThreadableLoader::handleResponse(unsigned long identifier, const ResourceResponse& response, PassOwnPtr<WebDataConsumerHandle> handle)
{
ASSERT(m_client);
if (!m_actualRequest.isNull()) {
reportResponseReceived(identifier, response);
handlePreflightResponse(response);
// |this| may be dead here in async mode.
return;
}
if (response.wasFetchedViaServiceWorker()) {
// It's still possible to reach here with null m_fallbackRequestForServiceWorker
// if the request was for main resource loading (i.e. for SharedWorker), for which
// we create DocumentLoader before the controller ServiceWorker is set.
ASSERT(!m_fallbackRequestForServiceWorker.isNull() || m_requestContext == WebURLRequest::RequestContextSharedWorker);
if (response.wasFallbackRequiredByServiceWorker()) {
// At this point we must have m_fallbackRequestForServiceWorker.
// (For SharedWorker the request won't be CORS or CORS-with-preflight,
// therefore fallback-to-network is handled in the browser process
// when the ServiceWorker does not call respondWith().)
ASSERT(!m_fallbackRequestForServiceWorker.isNull());
reportResponseReceived(identifier, response);
loadFallbackRequestForServiceWorker();
// |this| may be dead here in async mode.
return;
}
m_fallbackRequestForServiceWorker = ResourceRequest();
m_client->didReceiveResponse(identifier, response, handle);
return;
}
// Even if the request met the conditions to get handled by a Service Worker
// in the constructor of this class (and therefore
// |m_fallbackRequestForServiceWorker| is set), the Service Worker may skip
// processing the request. Only if the request is same origin, the skipped
// response may come here (wasFetchedViaServiceWorker() returns false) since
// such a request doesn't have to go through the CORS algorithm by calling
// loadFallbackRequestForServiceWorker().
// FIXME: We should use |m_sameOriginRequest| when we will support
// Suborigins (crbug.com/336894) for Service Worker.
ASSERT(m_fallbackRequestForServiceWorker.isNull() || securityOrigin()->canRequest(m_fallbackRequestForServiceWorker.url()));
m_fallbackRequestForServiceWorker = ResourceRequest();
if (!m_sameOriginRequest && m_options.crossOriginRequestPolicy == UseAccessControl) {
String accessControlErrorDescription;
if (!passesAccessControlCheck(response, effectiveAllowCredentials(), securityOrigin(), accessControlErrorDescription, m_requestContext)) {
reportResponseReceived(identifier, response);
ThreadableLoaderClient* client = m_client;
clear();
client->didFailAccessControlCheck(ResourceError(errorDomainBlinkInternal, 0, response.url().string(), accessControlErrorDescription));
// |this| may be dead here.
return;
}
}
m_client->didReceiveResponse(identifier, response, handle);
}
void DocumentThreadableLoader::handlePreflightResponse(
const ResourceResponse& response) {
String accessControlErrorDescription;
if (!passesAccessControlCheck(
response, effectiveAllowCredentials(), getSecurityOrigin(),
accessControlErrorDescription, m_requestContext)) {
handlePreflightFailure(
response.url().getString(),
"Response to preflight request doesn't pass access control check: " +
accessControlErrorDescription);
return;
}
if (!passesPreflightStatusCheck(response, accessControlErrorDescription)) {
handlePreflightFailure(response.url().getString(),
accessControlErrorDescription);
return;
}
if (m_actualRequest.isExternalRequest() &&
!passesExternalPreflightCheck(response, accessControlErrorDescription)) {
handlePreflightFailure(response.url().getString(),
accessControlErrorDescription);
return;
}
std::unique_ptr<CrossOriginPreflightResultCacheItem> preflightResult =
WTF::wrapUnique(
new CrossOriginPreflightResultCacheItem(effectiveAllowCredentials()));
if (!preflightResult->parse(response, accessControlErrorDescription) ||
!preflightResult->allowsCrossOriginMethod(
m_actualRequest.httpMethod(), accessControlErrorDescription) ||
!preflightResult->allowsCrossOriginHeaders(
m_actualRequest.httpHeaderFields(), accessControlErrorDescription)) {
handlePreflightFailure(response.url().getString(),
accessControlErrorDescription);
return;
}
CrossOriginPreflightResultCache::shared().appendEntry(
getSecurityOrigin()->toString(), m_actualRequest.url(),
std::move(preflightResult));
}
void DocumentThreadableLoader::handleResponse(
unsigned long identifier,
const ResourceResponse& response,
std::unique_ptr<WebDataConsumerHandle> handle) {
DCHECK(m_client);
if (!m_actualRequest.isNull()) {
reportResponseReceived(identifier, response);
handlePreflightResponse(response);
return;
}
if (response.wasFetchedViaServiceWorker()) {
if (response.wasFetchedViaForeignFetch())
UseCounter::count(m_document, UseCounter::ForeignFetchInterception);
if (response.wasFallbackRequiredByServiceWorker()) {
// At this point we must have m_fallbackRequestForServiceWorker. (For
// SharedWorker the request won't be CORS or CORS-with-preflight,
// therefore fallback-to-network is handled in the browser process when
// the ServiceWorker does not call respondWith().)
DCHECK(!m_fallbackRequestForServiceWorker.isNull());
reportResponseReceived(identifier, response);
loadFallbackRequestForServiceWorker();
return;
}
m_fallbackRequestForServiceWorker = ResourceRequest();
m_client->didReceiveResponse(identifier, response, std::move(handle));
return;
}
// Even if the request met the conditions to get handled by a Service Worker
// in the constructor of this class (and therefore
// |m_fallbackRequestForServiceWorker| is set), the Service Worker may skip
// processing the request. Only if the request is same origin, the skipped
// response may come here (wasFetchedViaServiceWorker() returns false) since
// such a request doesn't have to go through the CORS algorithm by calling
// loadFallbackRequestForServiceWorker().
// FIXME: We should use |m_sameOriginRequest| when we will support Suborigins
// (crbug.com/336894) for Service Worker.
DCHECK(
m_fallbackRequestForServiceWorker.isNull() ||
getSecurityOrigin()->canRequest(m_fallbackRequestForServiceWorker.url()));
m_fallbackRequestForServiceWorker = ResourceRequest();
if (!m_sameOriginRequest &&
m_options.crossOriginRequestPolicy == UseAccessControl) {
String accessControlErrorDescription;
if (!passesAccessControlCheck(
response, effectiveAllowCredentials(), getSecurityOrigin(),
accessControlErrorDescription, m_requestContext)) {
reportResponseReceived(identifier, response);
ThreadableLoaderClient* client = m_client;
clear();
client->didFailAccessControlCheck(
ResourceError(errorDomainBlinkInternal, 0, response.url().getString(),
accessControlErrorDescription));
return;
}
}
m_client->didReceiveResponse(identifier, response, std::move(handle));
}
// In this method, we can clear |request| to tell content::WebURLLoaderImpl of
// Chromium not to follow the redirect. This works only when this method is
// called by RawResource::willSendRequest(). If called by
// RawResource::didAddClient(), clearing |request| won't be propagated to
// content::WebURLLoaderImpl. So, this loader must also get detached from the
// resource by calling clearResource().
bool DocumentThreadableLoader::redirectReceived(
Resource* resource,
const ResourceRequest& request,
const ResourceResponse& redirectResponse) {
DCHECK(m_client);
DCHECK_EQ(resource, this->resource());
DCHECK(m_async);
m_checker.redirectReceived();
if (!m_actualRequest.isNull()) {
reportResponseReceived(resource->identifier(), redirectResponse);
handlePreflightFailure(redirectResponse.url().getString(),
"Response for preflight is invalid (redirect)");
return false;
}
if (m_redirectMode == WebURLRequest::FetchRedirectModeManual) {
// We use |m_redirectMode| to check the original redirect mode. |request| is
// a new request for redirect. So we don't set the redirect mode of it in
// WebURLLoaderImpl::Context::OnReceivedRedirect().
DCHECK(request.useStreamOnResponse());
// There is no need to read the body of redirect response because there is
// no way to read the body of opaque-redirect filtered response's internal
// response.
// TODO(horo): If we support any API which expose the internal body, we will
// have to read the body. And also HTTPCache changes will be needed because
// it doesn't store the body of redirect responses.
responseReceived(resource, redirectResponse,
WTF::makeUnique<EmptyDataHandle>());
if (m_client) {
DCHECK(m_actualRequest.isNull());
notifyFinished(resource);
}
return false;
}
if (m_redirectMode == WebURLRequest::FetchRedirectModeError) {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailRedirectCheck();
return false;
}
// Allow same origin requests to continue after allowing clients to audit the
// redirect.
if (isAllowedRedirect(request.url())) {
m_client->didReceiveRedirectTo(request.url());
if (m_client->isDocumentThreadableLoaderClient()) {
return static_cast<DocumentThreadableLoaderClient*>(m_client)
->willFollowRedirect(request, redirectResponse);
}
return true;
}
if (m_corsRedirectLimit <= 0) {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailRedirectCheck();
return false;
}
--m_corsRedirectLimit;
InspectorInstrumentation::didReceiveCORSRedirectResponse(
document().frame(), resource->identifier(),
document().frame()->loader().documentLoader(), redirectResponse,
resource);
bool allowRedirect = false;
String accessControlErrorDescription;
if (!CrossOriginAccessControl::isLegalRedirectLocation(
request.url(), accessControlErrorDescription)) {
accessControlErrorDescription =
"Redirect from '" + redirectResponse.url().getString() +
"' has been blocked by CORS policy: " + accessControlErrorDescription;
} else if (!m_sameOriginRequest &&
!passesAccessControlCheck(
redirectResponse, effectiveAllowCredentials(),
getSecurityOrigin(), accessControlErrorDescription,
m_requestContext)) {
// The redirect response must pass the access control check if the original
// request was not same-origin.
accessControlErrorDescription =
"Redirect from '" + redirectResponse.url().getString() + "' to '" +
request.url().getString() + "' has been blocked by CORS policy: " +
accessControlErrorDescription;
} else {
allowRedirect = true;
}
if (!allowRedirect) {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailAccessControlCheck(ResourceError(
errorDomainBlinkInternal, 0, redirectResponse.url().getString(),
accessControlErrorDescription));
return false;
}
m_client->didReceiveRedirectTo(request.url());
// FIXME: consider combining this with CORS redirect handling performed by
// CrossOriginAccessControl::handleRedirect().
clearResource();
// If the original request wasn't same-origin, then if the request URL origin
// is not same origin with the original URL origin, set the source origin to a
// globally unique identifier. (If the original request was same-origin, the
// origin of the new request should be the original URL origin.)
if (!m_sameOriginRequest) {
RefPtr<SecurityOrigin> originalOrigin =
SecurityOrigin::create(redirectResponse.url());
RefPtr<SecurityOrigin> requestOrigin =
SecurityOrigin::create(request.url());
if (!originalOrigin->isSameSchemeHostPort(requestOrigin.get()))
m_securityOrigin = SecurityOrigin::createUnique();
}
// Force any subsequent requests to use these checks.
m_sameOriginRequest = false;
// Since the request is no longer same-origin, if the user didn't request
// credentials in the first place, update our state so we neither request them
// nor expect they must be allowed.
if (m_resourceLoaderOptions.credentialsRequested ==
ClientDidNotRequestCredentials)
m_forceDoNotAllowStoredCredentials = true;
// Save the referrer to use when following the redirect.
m_overrideReferrer = true;
m_referrerAfterRedirect =
Referrer(request.httpReferrer(), request.getReferrerPolicy());
ResourceRequest crossOriginRequest(request);
// Remove any headers that may have been added by the network layer that cause
// access control to fail.
crossOriginRequest.clearHTTPReferrer();
crossOriginRequest.clearHTTPOrigin();
crossOriginRequest.clearHTTPUserAgent();
// Add any request headers which we previously saved from the
// original request.
for (const auto& header : m_requestHeaders)
crossOriginRequest.setHTTPHeaderField(header.key, header.value);
makeCrossOriginAccessRequest(crossOriginRequest);
return false;
}
void DocumentThreadableLoader::makeCrossOriginAccessRequest(
const ResourceRequest& request) {
DCHECK(m_options.crossOriginRequestPolicy == UseAccessControl ||
request.isExternalRequest());
DCHECK(m_client);
DCHECK(!resource());
// Cross-origin requests are only allowed certain registered schemes. We would
// catch this when checking response headers later, but there is no reason to
// send a request, preflighted or not, that's guaranteed to be denied.
if (!SchemeRegistry::shouldTreatURLSchemeAsCORSEnabled(
request.url().protocol())) {
InspectorInstrumentation::
documentThreadableLoaderFailedToStartLoadingForClient(m_document,
m_client);
ThreadableLoaderClient* client = m_client;
clear();
client->didFailAccessControlCheck(ResourceError(
errorDomainBlinkInternal, 0, request.url().getString(),
"Cross origin requests are only supported for protocol schemes: " +
SchemeRegistry::listOfCORSEnabledURLSchemes() + "."));
return;
}
// Non-secure origins may not make "external requests":
// https://mikewest.github.io/cors-rfc1918/#integration-fetch
if (!document().isSecureContext() && request.isExternalRequest()) {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailAccessControlCheck(
ResourceError(errorDomainBlinkInternal, 0, request.url().getString(),
"Requests to internal network resources are not allowed "
"from non-secure contexts (see https://goo.gl/Y0ZkNV). "
"This is an experimental restriction which is part of "
"'https://mikewest.github.io/cors-rfc1918/'."));
return;
}
ResourceRequest crossOriginRequest(request);
ResourceLoaderOptions crossOriginOptions(m_resourceLoaderOptions);
crossOriginRequest.removeCredentials();
crossOriginRequest.setAllowStoredCredentials(effectiveAllowCredentials() ==
AllowStoredCredentials);
// We update the credentials mode according to effectiveAllowCredentials()
// here for backward compatibility. But this is not correct.
// FIXME: We should set it in the caller of DocumentThreadableLoader.
crossOriginRequest.setFetchCredentialsMode(
effectiveAllowCredentials() == AllowStoredCredentials
? WebURLRequest::FetchCredentialsModeInclude
: WebURLRequest::FetchCredentialsModeOmit);
// We use isSimpleOrForbiddenRequest() here since |request| may have been
// modified in the process of loading (not from the user's input). For
// example, referrer. We need to accept them. For security, we must reject
// forbidden headers/methods at the point we accept user's input. Not here.
if (!request.isExternalRequest() &&
((m_options.preflightPolicy == ConsiderPreflight &&
FetchUtils::isSimpleOrForbiddenRequest(request.httpMethod(),
request.httpHeaderFields())) ||
m_options.preflightPolicy == PreventPreflight)) {
prepareCrossOriginRequest(crossOriginRequest);
loadRequest(crossOriginRequest, crossOriginOptions);
} else {
bool shouldForcePreflight =
request.isExternalRequest() ||
InspectorInstrumentation::shouldForceCORSPreflight(m_document);
bool canSkipPreflight =
CrossOriginPreflightResultCache::shared().canSkipPreflight(
getSecurityOrigin()->toString(), crossOriginRequest.url(),
effectiveAllowCredentials(), crossOriginRequest.httpMethod(),
crossOriginRequest.httpHeaderFields());
if (canSkipPreflight && !shouldForcePreflight) {
if (getSecurityOrigin())
crossOriginRequest.setHTTPOrigin(getSecurityOrigin());
if (m_overrideReferrer)
crossOriginRequest.setHTTPReferrer(m_referrerAfterRedirect);
prepareCrossOriginRequest(crossOriginRequest);
loadRequest(crossOriginRequest, crossOriginOptions);
} else {
ResourceRequest preflightRequest = createAccessControlPreflightRequest(
crossOriginRequest, getSecurityOrigin());
// Create a ResourceLoaderOptions for preflight.
ResourceLoaderOptions preflightOptions = crossOriginOptions;
preflightOptions.allowCredentials = DoNotAllowStoredCredentials;
m_actualRequest = crossOriginRequest;
m_actualOptions = crossOriginOptions;
prepareCrossOriginRequest(crossOriginRequest);
loadRequest(preflightRequest, preflightOptions);
}
}
}
// In this method, we can clear |request| to tell content::WebURLLoaderImpl of
// Chromium not to follow the redirect. This works only when this method is
// called by RawResource::willSendRequest(). If called by
// RawResource::didAddClient(), clearing |request| won't be propagated
// to content::WebURLLoaderImpl. So, this loader must also get detached from
// the resource by calling clearResource().
void DocumentThreadableLoader::redirectReceived(Resource* resource, ResourceRequest& request, const ResourceResponse& redirectResponse)
{
ASSERT(m_client);
ASSERT_UNUSED(resource, resource == this->resource());
ASSERT(m_async);
if (!m_actualRequest.isNull()) {
reportResponseReceived(resource->identifier(), redirectResponse);
handlePreflightFailure(redirectResponse.url().string(), "Response for preflight is invalid (redirect)");
// |this| may be dead here.
request = ResourceRequest();
return;
}
if (m_redirectMode == WebURLRequest::FetchRedirectModeManual) {
// Keep |this| alive even if the client release a reference in
// responseReceived().
RefPtr<DocumentThreadableLoader> protect(this);
// We use |m_redirectMode| to check the original redirect mode.
// |request| is a new request for redirect. So we don't set the redirect
// mode of it in WebURLLoaderImpl::Context::OnReceivedRedirect().
ASSERT(request.useStreamOnResponse());
// There is no need to read the body of redirect response because there
// is no way to read the body of opaque-redirect filtered response's
// internal response.
// TODO(horo): If we support any API which expose the internal body, we
// will have to read the body. And also HTTPCache changes will be needed
// because it doesn't store the body of redirect responses.
responseReceived(resource, redirectResponse, adoptPtr(new EmptyDataHandle()));
if (m_client) {
ASSERT(m_actualRequest.isNull());
notifyFinished(resource);
}
request = ResourceRequest();
return;
}
if (m_redirectMode == WebURLRequest::FetchRedirectModeError || !isAllowedByContentSecurityPolicy(request.url(), ContentSecurityPolicy::DidRedirect)) {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailRedirectCheck();
// |this| may be dead here.
request = ResourceRequest();
return;
}
// Allow same origin requests to continue after allowing clients to audit the redirect.
if (isAllowedRedirect(request.url())) {
if (m_client->isDocumentThreadableLoaderClient())
static_cast<DocumentThreadableLoaderClient*>(m_client)->willFollowRedirect(request, redirectResponse);
return;
}
if (m_corsRedirectLimit <= 0) {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailRedirectCheck();
// |this| may be dead here.
} else if (m_options.crossOriginRequestPolicy == UseAccessControl) {
--m_corsRedirectLimit;
InspectorInstrumentation::didReceiveCORSRedirectResponse(document().frame(), resource->identifier(), document().frame()->loader().documentLoader(), redirectResponse, 0);
bool allowRedirect = false;
String accessControlErrorDescription;
// Non-simple cross origin requests (both preflight and actual one) are
// not allowed to follow redirect.
if (m_crossOriginNonSimpleRequest) {
accessControlErrorDescription = "The request was redirected to '"+ request.url().string() + "', which is disallowed for cross-origin requests that require preflight.";
} else {
// The redirect response must pass the access control check if the
// original request was not same-origin.
allowRedirect = CrossOriginAccessControl::isLegalRedirectLocation(request.url(), accessControlErrorDescription)
&& (m_sameOriginRequest || passesAccessControlCheck(redirectResponse, effectiveAllowCredentials(), securityOrigin(), accessControlErrorDescription, m_requestContext));
}
if (allowRedirect) {
// FIXME: consider combining this with CORS redirect handling performed by
// CrossOriginAccessControl::handleRedirect().
clearResource();
RefPtr<SecurityOrigin> originalOrigin = SecurityOrigin::create(redirectResponse.url());
RefPtr<SecurityOrigin> requestOrigin = SecurityOrigin::create(request.url());
// If the original request wasn't same-origin, then if the request URL origin is not same origin with the original URL origin,
// set the source origin to a globally unique identifier. (If the original request was same-origin, the origin of the new request
// should be the original URL origin.)
if (!m_sameOriginRequest && !originalOrigin->isSameSchemeHostPort(requestOrigin.get()))
m_securityOrigin = SecurityOrigin::createUnique();
// Force any subsequent requests to use these checks.
m_sameOriginRequest = false;
// Since the request is no longer same-origin, if the user didn't request credentials in
// the first place, update our state so we neither request them nor expect they must be allowed.
if (m_resourceLoaderOptions.credentialsRequested == ClientDidNotRequestCredentials)
m_forceDoNotAllowStoredCredentials = true;
// Remove any headers that may have been added by the network layer that cause access control to fail.
request.clearHTTPReferrer();
request.clearHTTPOrigin();
request.clearHTTPUserAgent();
// Add any CORS simple request headers which we previously saved from the original request.
for (const auto& header : m_simpleRequestHeaders)
request.setHTTPHeaderField(header.key, header.value);
makeCrossOriginAccessRequest(request);
// |this| may be dead here.
return;
}
ThreadableLoaderClient* client = m_client;
clear();
client->didFailAccessControlCheck(ResourceError(errorDomainBlinkInternal, 0, redirectResponse.url().string(), accessControlErrorDescription));
// |this| may be dead here.
} else {
ThreadableLoaderClient* client = m_client;
clear();
client->didFailRedirectCheck();
// |this| may be dead here.
}
request = ResourceRequest();
}
