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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 http://mozilla.org/MPL/2.0/. */
#include "ServiceWorkerInterceptController.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/StaticPrefs_privacy.h"
#include "mozilla/StorageAccess.h"
#include "mozilla/StoragePrincipalHelper.h"
#include "mozilla/dom/CanonicalBrowsingContext.h"
#include "mozilla/dom/InternalRequest.h"
#include "mozilla/net/HttpBaseChannel.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsIChannel.h"
#include "nsICookieJarSettings.h"
#include "ServiceWorkerManager.h"
#include "nsIPrincipal.h"
#include "nsQueryObject.h"
namespace mozilla::dom {
namespace {
bool IsWithinObjectOrEmbed(const nsCOMPtr<nsILoadInfo>& loadInfo) {
RefPtr<BrowsingContext> browsingContext;
loadInfo->GetTargetBrowsingContext(getter_AddRefs(browsingContext));
for (BrowsingContext* cur = browsingContext.get(); cur;
cur = cur->GetParent()) {
if (cur->IsEmbedderTypeObjectOrEmbed()) {
return true;
}
}
return false;
}
} // namespace
NS_IMPL_ISUPPORTS(ServiceWorkerInterceptController,
nsINetworkInterceptController)
NS_IMETHODIMP
ServiceWorkerInterceptController::ShouldPrepareForIntercept(
nsIURI* aURI, nsIChannel* aChannel, bool* aShouldIntercept) {
*aShouldIntercept = false;
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
// Block interception if the request's destination is within an object or
// embed element.
if (IsWithinObjectOrEmbed(loadInfo)) {
return NS_OK;
}
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 =
loadInfo->GetController();
// If the controller doesn't handle fetch events, return false
if (!controller.isSome()) {
return NS_OK;
}
*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 =
controller.ref().GetPrincipal().unwrap();
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;
}
registration->MaybeScheduleTimeCheckAndUpdate();
}
RefPtr<net::HttpBaseChannel> httpChannel = do_QueryObject(aChannel);
if (httpChannel &&
httpChannel->GetRequestHead()->HasHeader(net::nsHttp::Range)) {
RequestMode requestMode =
InternalRequest::MapChannelToRequestMode(aChannel);
bool mayLoad = nsContentUtils::CheckMayLoad(
loadInfo->GetLoadingPrincipal(), aChannel,
/*allowIfInheritsPrincipal*/ false);
if (requestMode == RequestMode::No_cors && !mayLoad) {
*aShouldIntercept = false;
}
}
return NS_OK;
}
nsCOMPtr<nsIPrincipal> principal;
nsresult rv = StoragePrincipalHelper::GetPrincipal(
aChannel,
StaticPrefs::privacy_partition_serviceWorkers()
? StoragePrincipalHelper::eForeignPartitionedPrincipal
: StoragePrincipalHelper::eRegularPrincipal,
getter_AddRefs(principal));
NS_ENSURE_SUCCESS(rv, rv);
// First check with the ServiceWorkerManager for a matching service worker.
if (!swm || !swm->IsAvailable(principal, aURI, aChannel)) {
return NS_OK;
}
// Check if we're in a secure context, unless service worker testing is
// enabled.
if (!nsContentUtils::ComputeIsSecureContext(aChannel) &&
!StaticPrefs::dom_serviceWorkers_testing_enabled()) {
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.
auto storageAccess = StorageAllowedForChannel(aChannel);
if (storageAccess != StorageAccess::eAllow) {
if (!StaticPrefs::privacy_partition_serviceWorkers()) {
return NS_OK;
}
nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
loadInfo->GetCookieJarSettings(getter_AddRefs(cookieJarSettings));
if (!StoragePartitioningEnabled(storageAccess, cookieJarSettings)) {
return NS_OK;
}
}
*aShouldIntercept = true;
return NS_OK;
}
NS_IMETHODIMP
ServiceWorkerInterceptController::ChannelIntercepted(
nsIInterceptedChannel* aChannel) {
// Note, do not cancel the interception here. The caller will try to
// ResetInterception() on error.
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (!swm) {
return NS_ERROR_FAILURE;
}
ErrorResult error;
swm->DispatchFetchEvent(aChannel, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
return NS_OK;
}
} // namespace mozilla::dom
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