dom/serviceworkers/ServiceWorkerUnregisterJob.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "ServiceWorkerUnregisterJob.h"
   8
   9 #include "mozilla/Unused.h"
  10 #include "nsIPushService.h"
  11 #include "nsThreadUtils.h"
  12 #include "ServiceWorkerManager.h"
  13
  14 namespace mozilla {
  15 namespace dom {
  16
  17 class ServiceWorkerUnregisterJob::PushUnsubscribeCallback final :
  18         public nsIUnsubscribeResultCallback
  19 {
  20 public:
  21   NS_DECL_ISUPPORTS
  22
  23   explicit PushUnsubscribeCallback(ServiceWorkerUnregisterJob* aJob)
  24     : mJob(aJob)
  25   {
  26     MOZ_ASSERT(NS_IsMainThread());
  27   }
  28
  29   NS_IMETHOD
  30   OnUnsubscribe(nsresult aStatus, bool) override
  31   {
  32     // Warn if unsubscribing fails, but don't prevent the worker from
  33     // unregistering.
  34     Unused << NS_WARN_IF(NS_FAILED(aStatus));
  35     mJob->Unregister();
  36     return NS_OK;
  37   }
  38
  39 private:
  40   ~PushUnsubscribeCallback()
  41   {
  42   }
  43
  44   RefPtr<ServiceWorkerUnregisterJob> mJob;
  45 };
  46
  47 NS_IMPL_ISUPPORTS(ServiceWorkerUnregisterJob::PushUnsubscribeCallback,
  48                   nsIUnsubscribeResultCallback)
  49
  50 ServiceWorkerUnregisterJob::ServiceWorkerUnregisterJob(nsIPrincipal* aPrincipal,
  51                                                        const nsACString& aScope,
  52                                                        bool aSendToParent)
  53   : ServiceWorkerJob(Type::Unregister, aPrincipal, aScope, EmptyCString())
  54   , mResult(false)
  55   , mSendToParent(aSendToParent)
  56 {
  57 }
  58
  59 bool
  60 ServiceWorkerUnregisterJob::GetResult() const
  61 {
  62   MOZ_ASSERT(NS_IsMainThread());
  63   return mResult;
  64 }
  65
  66 ServiceWorkerUnregisterJob::~ServiceWorkerUnregisterJob()
  67 {
  68 }
  69
  70 void
  71 ServiceWorkerUnregisterJob::AsyncExecute()
  72 {
  73   MOZ_ASSERT(NS_IsMainThread());
  74
  75   if (Canceled()) {
  76     Finish(NS_ERROR_DOM_ABORT_ERR);
  77     return;
  78   }
  79
  80   // Push API, section 5: "When a service worker registration is unregistered,
  81   // any associated push subscription must be deactivated." To ensure the
  82   // service worker registration isn't cleared as we're unregistering, we
  83   // unsubscribe first.
  84   nsCOMPtr<nsIPushService> pushService =
  85     do_GetService("@mozilla.org/push/Service;1");
  86   if (NS_WARN_IF(!pushService)) {
  87     Unregister();
  88     return;
  89   }
  90   nsCOMPtr<nsIUnsubscribeResultCallback> unsubscribeCallback =
  91     new PushUnsubscribeCallback(this);
  92   nsresult rv = pushService->Unsubscribe(NS_ConvertUTF8toUTF16(mScope),
  93                                          mPrincipal, unsubscribeCallback);
  94   if (NS_WARN_IF(NS_FAILED(rv))) {
  95     Unregister();
  96   }
  97 }
  98
  99 void
 100 ServiceWorkerUnregisterJob::Unregister()
 101 {
 102   MOZ_ASSERT(NS_IsMainThread());
 103
 104   RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
 105   if (Canceled() || !swm) {
 106     Finish(NS_ERROR_DOM_ABORT_ERR);
 107     return;
 108   }
 109
 110   // Step 1 of the Unregister algorithm requires checking that the
 111   // client origin matches the scope's origin.  We perform this in
 112   // registration->update() method directly since we don't have that
 113   // client information available here.
 114
 115   // "Let registration be the result of running [[Get Registration]]
 116   // algorithm passing scope as the argument."
 117   RefPtr<ServiceWorkerRegistrationInfo> registration =
 118     swm->GetRegistration(mPrincipal, mScope);
 119   if (!registration) {
 120     // "If registration is null, then, resolve promise with false."
 121     Finish(NS_OK);
 122     return;
 123   }
 124
 125   // Note, we send the message to remove the registration from disk now even
 126   // though we may only set the pending uninstall flag below.  This is
 127   // necessary to ensure the registration is removed if the controlled
 128   // clients are closed by shutting down the browser.  If the registration
 129   // is resurrected by clearing pending uninstall then it should be saved
 130   // to disk again.
 131   if (mSendToParent && !registration->IsPendingUninstall()) {
 132     swm->MaybeSendUnregister(mPrincipal, mScope);
 133   }
 134
 135   // "Set registration's uninstalling flag."
 136   registration->SetPendingUninstall();
 137
 138   // "Resolve promise with true"
 139   mResult = true;
 140   InvokeResultCallbacks(NS_OK);
 141
 142   // "If no service worker client is using registration..."
 143   if (!registration->IsControllingClients() && registration->IsIdle()) {
 144     // "Invoke [[Clear Registration]]..."
 145     swm->RemoveRegistration(registration);
 146   }
 147
 148   Finish(NS_OK);
 149 }
 150
 151 } // namespace dom
 152 } // namespace mozilla