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 "WorkerRef.h"
   9 #include "WorkerRunnable.h"
  10 #include "WorkerScope.h"
  11 #include "mozilla/dom/SecurityPolicyViolationEvent.h"
  12 #include "mozilla/dom/SecurityPolicyViolationEventBinding.h"
  13 #include "mozilla/dom/WorkerRunnable.h"
  14
  15 using namespace mozilla::dom;
  16
  17 namespace {
  18
  19 class WorkerCSPEventRunnable final : public MainThreadWorkerRunnable {
  20  public:
  21   WorkerCSPEventRunnable(WorkerPrivate* aWorkerPrivate, const nsAString& aJSON)
  22       : MainThreadWorkerRunnable(aWorkerPrivate), mJSON(aJSON) {}
  23
  24  private:
  25   bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) {
  26     SecurityPolicyViolationEventInit violationEventInit;
  27     if (NS_WARN_IF(!violationEventInit.Init(mJSON))) {
  28       return true;
  29     }
  30
  31     RefPtr<mozilla::dom::Event> event =
  32         mozilla::dom::SecurityPolicyViolationEvent::Constructor(
  33             aWorkerPrivate->GlobalScope(), u"securitypolicyviolation"_ns,
  34             violationEventInit);
  35     event->SetTrusted(true);
  36
  37     aWorkerPrivate->GlobalScope()->DispatchEvent(*event);
  38     return true;
  39   }
  40
  41   const nsString mJSON;
  42 };
  43
  44 }  // namespace
  45
  46 NS_IMPL_ISUPPORTS(WorkerCSPEventListener, nsICSPEventListener)
  47
  48 /* static */
  49 already_AddRefed<WorkerCSPEventListener> WorkerCSPEventListener::Create(
  50     WorkerPrivate* aWorkerPrivate) {
  51   MOZ_ASSERT(aWorkerPrivate);
  52   aWorkerPrivate->AssertIsOnWorkerThread();
  53
  54   RefPtr<WorkerCSPEventListener> listener = new WorkerCSPEventListener();
  55
  56   MutexAutoLock lock(listener->mMutex);
  57   listener->mWorkerRef = WeakWorkerRef::Create(aWorkerPrivate, [listener]() {
  58     MutexAutoLock lock(listener->mMutex);
  59     listener->mWorkerRef = nullptr;
  60   });
  61
  62   if (NS_WARN_IF(!listener->mWorkerRef)) {
  63     return nullptr;
  64   }
  65
  66   return listener.forget();
  67 }
  68
  69 WorkerCSPEventListener::WorkerCSPEventListener()
  70     : mMutex("WorkerCSPEventListener::mMutex") {}
  71
  72 NS_IMETHODIMP
  73 WorkerCSPEventListener::OnCSPViolationEvent(const nsAString& aJSON) {
  74   MOZ_ASSERT(NS_IsMainThread());
  75
  76   MutexAutoLock lock(mMutex);
  77   if (!mWorkerRef) {
  78     return NS_OK;
  79   }
  80
  81   WorkerPrivate* workerPrivate = mWorkerRef->GetUnsafePrivate();
  82   MOZ_ASSERT(workerPrivate);
  83
  84   RefPtr<WorkerCSPEventRunnable> runnable =
  85       new WorkerCSPEventRunnable(workerPrivate, aJSON);
  86   runnable->Dispatch();
  87
  88   return NS_OK;
  89 }