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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#include "ServiceWorkerInterceptController.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/StorageAccess.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsIChannel.h"
#include "ServiceWorkerManager.h"
#include "nsIPrincipal.h"
namespace mozilla {
namespace dom {
nsIURI* aURI, nsIChannel* aChannel, bool* aShouldIntercept) {
*aShouldIntercept = false;
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
// For subresource requests we base our decision solely on the client's
// controller value. Any settings that would have blocked service worker
// access should have been set before the initial navigation created the
// window.
if (!nsContentUtils::IsNonSubresourceRequest(aChannel)) {
const Maybe<ServiceWorkerDescriptor>& controller =
// For child intercept, only checking the loadInfo controller existence.
if (!ServiceWorkerParentInterceptEnabled()) {
*aShouldIntercept = controller.isSome();
return NS_OK;
// If the controller doesn't handle fetch events, return false
if (controller.isSome()) {
*aShouldIntercept = controller.ref().HandlesFetch();
// The service worker has no fetch event handler, try to schedule a
// soft-update through ServiceWorkerRegistrationInfo.
// Get ServiceWorkerRegistrationInfo by the ServiceWorkerInfo's principal
// and scope
if (!*aShouldIntercept && swm) {
nsCOMPtr<nsIPrincipal> principal =
RefPtr<ServiceWorkerRegistrationInfo> registration =
swm->GetRegistration(principal, controller.ref().Scope());
// Could not get ServiceWorkerRegistration here if unregister is
// executed before getting here.
if (NS_WARN_IF(!registration)) {
return NS_OK;
} else {
*aShouldIntercept = false;
return NS_OK;
nsCOMPtr<nsIPrincipal> principal = BasePrincipal::CreateContentPrincipal(
aURI, loadInfo->GetOriginAttributes());
// First check with the ServiceWorkerManager for a matching service worker.
if (!swm || !swm->IsAvailable(principal, aURI, aChannel)) {
return NS_OK;
// Then check to see if we are allowed to control the window.
// It is important to check for the availability of the service worker first
// to avoid showing warnings about the use of third-party cookies in the UI
// unnecessarily when no service worker is being accessed.
if (StorageAllowedForChannel(aChannel) != StorageAccess::eAllow) {
return NS_OK;
*aShouldIntercept = true;
return NS_OK;
nsIInterceptedChannel* aChannel) {
// Note, do not cancel the interception here. The caller will try to
// ResetInterception() on error.
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (!swm) {
ErrorResult error;
swm->DispatchFetchEvent(aChannel, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
return NS_OK;
} // namespace dom
} // namespace mozilla