// This is called when the channel is redirected.
NS_IMETHODIMP
FetchDriver::AsyncOnChannelRedirect(nsIChannel* aOldChannel,
nsIChannel* aNewChannel,
uint32_t aFlags,
nsIAsyncVerifyRedirectCallback *aCallback)
{
NS_PRECONDITION(aNewChannel, "Redirect without a channel?");
nsresult rv;
// Section 4.2, Step 4.6-4.7, enforcing a redirect count is done by Necko.
// The pref used is "network.http.redirection-limit" which is set to 20 by
// default.
//
// Step 4.8. We only unset this for spec compatibility. Any actions we take
// on mRequest here do not affect what the channel does.
mRequest->UnsetSameOriginDataURL();
//
// Requests that require preflight are not permitted to redirect.
// Fetch spec section 4.2 "HTTP Fetch", step 4.9 just uses the manual
// redirect flag to decide whether to execute step 4.10 or not. We do not
// represent it in our implementation.
// The only thing we do is to check if the request requires a preflight (part
// of step 4.9), in which case we abort. This part cannot be done by
// nsCORSListenerProxy since it does not have access to mRequest.
// which case. Step 4.10.3 is handled by OnRedirectVerifyCallback(), and all
// the other steps are handled by nsCORSListenerProxy.
if (!NS_IsInternalSameURIRedirect(aOldChannel, aNewChannel, aFlags)) {
rv = DoesNotRequirePreflight(aNewChannel);
if (NS_FAILED(rv)) {
NS_WARNING("FetchDriver::OnChannelRedirect: "
"DoesNotRequirePreflight returned failure");
return rv;
}
}
mRedirectCallback = aCallback;
mOldRedirectChannel = aOldChannel;
mNewRedirectChannel = aNewChannel;
nsCOMPtr<nsIChannelEventSink> outer =
do_GetInterface(mNotificationCallbacks);
if (outer) {
// The callee is supposed to call OnRedirectVerifyCallback() on success,
// and nobody has to call it on failure, so we can just return after this
// block.
rv = outer->AsyncOnChannelRedirect(aOldChannel, aNewChannel, aFlags, this);
if (NS_FAILED(rv)) {
aOldChannel->Cancel(rv);
mRedirectCallback = nullptr;
mOldRedirectChannel = nullptr;
mNewRedirectChannel = nullptr;
}
return rv;
}
(void) OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
NS_IMETHODIMP
nsCORSPreflightListener::AsyncOnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags,
nsIAsyncVerifyRedirectCallback *callback)
{
// Only internal redirects allowed for now.
if (!NS_IsInternalSameURIRedirect(aOldChannel, aNewChannel, aFlags))
return NS_ERROR_DOM_BAD_URI;
callback->OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
NS_IMETHODIMP
nsCrossSiteListenerProxy::AsyncOnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags,
nsIAsyncVerifyRedirectCallback *cb)
{
nsresult rv;
if (!NS_IsInternalSameURIRedirect(aOldChannel, aNewChannel, aFlags)) {
rv = CheckRequestApproved(aOldChannel, PR_TRUE);
if (NS_FAILED(rv)) {
if (nsXMLHttpRequest::sAccessControlCache) {
nsCOMPtr<nsIURI> oldURI;
NS_GetFinalChannelURI(aOldChannel, getter_AddRefs(oldURI));
if (oldURI) {
nsXMLHttpRequest::sAccessControlCache->
RemoveEntries(oldURI, mRequestingPrincipal);
}
}
aOldChannel->Cancel(NS_ERROR_DOM_BAD_URI);
return NS_ERROR_DOM_BAD_URI;
}
}
// Prepare to receive callback
mRedirectCallback = cb;
mOldRedirectChannel = aOldChannel;
mNewRedirectChannel = aNewChannel;
nsCOMPtr<nsIChannelEventSink> outer =
do_GetInterface(mOuterNotificationCallbacks);
if (outer) {
rv = outer->AsyncOnChannelRedirect(aOldChannel, aNewChannel, aFlags, this);
if (NS_FAILED(rv)) {
aOldChannel->Cancel(rv); // is this necessary...?
mRedirectCallback = nsnull;
mOldRedirectChannel = nsnull;
mNewRedirectChannel = nsnull;
}
return rv;
}
(void) OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
NS_IMETHODIMP
nsCrossSiteListenerProxy::OnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags)
{
nsChannelCanceller canceller(aOldChannel);
nsresult rv;
if (!NS_IsInternalSameURIRedirect(aOldChannel, aNewChannel, aFlags)) {
rv = CheckRequestApproved(aOldChannel, PR_TRUE);
if (NS_FAILED(rv)) {
if (nsXMLHttpRequest::sAccessControlCache) {
nsCOMPtr<nsIURI> oldURI;
aOldChannel->GetURI(getter_AddRefs(oldURI));
if (oldURI) {
nsXMLHttpRequest::sAccessControlCache->
RemoveEntries(oldURI, mRequestingPrincipal);
}
}
return NS_ERROR_DOM_BAD_URI;
}
}
nsCOMPtr<nsIChannelEventSink> outer =
do_GetInterface(mOuterNotificationCallbacks);
if (outer) {
rv = outer->OnChannelRedirect(aOldChannel, aNewChannel, aFlags);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = UpdateChannel(aNewChannel);
NS_ENSURE_SUCCESS(rv, rv);
canceller.DontCancel();
return NS_OK;
}
