dom/workers/WorkerCSPEventListener.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 "WorkerCSPEventListener.h"
   8 #include "WorkerPrivate.h"
   9 #include "WorkerRef.h"
  10 #include "mozilla/dom/SecurityPolicyViolationEvent.h"
  11 #include "mozilla/dom/SecurityPolicyViolationEventBinding.h"
  12
  13 using namespace mozilla::dom;
  14
  15 namespace {
  16
  17 class WorkerCSPEventRunnable final : public MainThreadWorkerRunnable {
  18  public:
  19   WorkerCSPEventRunnable(WorkerPrivate* aWorkerPrivate, const nsAString& aJSON)
  20       : MainThreadWorkerRunnable(aWorkerPrivate), mJSON(aJSON) {}
  21
  22  private:
  23   bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) {
  24     SecurityPolicyViolationEventInit violationEventInit;
  25     if (NS_WARN_IF(!violationEventInit.Init(mJSON))) {
  26       return true;
  27     }
  28
  29     RefPtr<mozilla::dom::Event> event =
  30         mozilla::dom::SecurityPolicyViolationEvent::Constructor(
  31             aWorkerPrivate->GlobalScope(),
  32             NS_LITERAL_STRING("securitypolicyviolation"), violationEventInit);
  33     event->SetTrusted(true);
  34
  35     aWorkerPrivate->GlobalScope()->DispatchEvent(*event);
  36     return true;
  37   }
  38
  39   const nsString mJSON;
  40 };
  41
  42 }  // namespace
  43
  44 NS_IMPL_ISUPPORTS(WorkerCSPEventListener, nsICSPEventListener)
  45
  46 /* static */
  47 already_AddRefed<WorkerCSPEventListener> WorkerCSPEventListener::Create(
  48     WorkerPrivate* aWorkerPrivate) {
  49   MOZ_ASSERT(aWorkerPrivate);
  50   aWorkerPrivate->AssertIsOnWorkerThread();
  51
  52   RefPtr<WorkerCSPEventListener> listener = new WorkerCSPEventListener();
  53
  54   listener->mWorkerRef = WeakWorkerRef::Create(aWorkerPrivate, [listener]() {
  55     MutexAutoLock lock(listener->mMutex);
  56     listener->mWorkerRef = nullptr;
  57   });
  58
  59   if (NS_WARN_IF(!listener->mWorkerRef)) {
  60     return nullptr;
  61   }
  62
  63   return listener.forget();
  64 }
  65
  66 WorkerCSPEventListener::WorkerCSPEventListener()
  67     : mMutex("WorkerCSPEventListener::mMutex") {}
  68
  69 NS_IMETHODIMP
  70 WorkerCSPEventListener::OnCSPViolationEvent(const nsAString& aJSON) {
  71   MOZ_ASSERT(NS_IsMainThread());
  72
  73   MutexAutoLock lock(mMutex);
  74   if (!mWorkerRef) {
  75     return NS_OK;
  76   }
  77
  78   WorkerPrivate* workerPrivate = mWorkerRef->GetUnsafePrivate();
  79   MOZ_ASSERT(workerPrivate);
  80
  81   RefPtr<WorkerCSPEventRunnable> runnable =
  82       new WorkerCSPEventRunnable(workerPrivate, aJSON);
  83   runnable->Dispatch();
  84
  85   return NS_OK;
  86 }