Quelle ServiceWorkerInterceptController.cpp Sprache: C

/* -*- 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

quality96%

¤ Dauer der Verarbeitung: 0.25 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.