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, "WorkerCSPEventRunnable"),
  23         mJSON(aJSON) {}
  24
  25  private:
  26   bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) {
  27     SecurityPolicyViolationEventInit violationEventInit;
  28     if (NS_WARN_IF(!violationEventInit.Init(mJSON))) {
  29       return true;
  30     }
  31
  32     RefPtr<mozilla::dom::Event> event =
  33         mozilla::dom::SecurityPolicyViolationEvent::Constructor(
  34             aWorkerPrivate->GlobalScope(), u"securitypolicyviolation"_ns,
  35             violationEventInit);
  36     event->SetTrusted(true);
  37
  38     aWorkerPrivate->GlobalScope()->DispatchEvent(*event);
  39     return true;
  40   }
  41
  42   const nsString mJSON;
  43 };
  44
  45 }  // namespace
  46
  47 NS_IMPL_ISUPPORTS(WorkerCSPEventListener, nsICSPEventListener)
  48
  49 /* static */
  50 already_AddRefed<WorkerCSPEventListener> WorkerCSPEventListener::Create(
  51     WorkerPrivate* aWorkerPrivate) {
  52   MOZ_ASSERT(aWorkerPrivate);
  53   aWorkerPrivate->AssertIsOnWorkerThread();
  54
  55   RefPtr<WorkerCSPEventListener> listener = new WorkerCSPEventListener();
  56
  57   MutexAutoLock lock(listener->mMutex);
  58   listener->mWorkerRef = WeakWorkerRef::Create(aWorkerPrivate, [listener]() {
  59     MutexAutoLock lock(listener->mMutex);
  60     listener->mWorkerRef = nullptr;
  61   });
  62
  63   if (NS_WARN_IF(!listener->mWorkerRef)) {
  64     return nullptr;
  65   }
  66
  67   return listener.forget();
  68 }
  69
  70 WorkerCSPEventListener::WorkerCSPEventListener()
  71     : mMutex("WorkerCSPEventListener::mMutex") {}
  72
  73 NS_IMETHODIMP
  74 WorkerCSPEventListener::OnCSPViolationEvent(const nsAString& aJSON) {
  75   MutexAutoLock lock(mMutex);
  76   if (!mWorkerRef) {
  77     return NS_OK;
  78   }
  79
  80   WorkerPrivate* workerPrivate = mWorkerRef->GetUnsafePrivate();
  81   MOZ_ASSERT(workerPrivate);
  82
  83   if (NS_IsMainThread()) {
  84     RefPtr<WorkerCSPEventRunnable> runnable =
  85         new WorkerCSPEventRunnable(workerPrivate, aJSON);
  86     runnable->Dispatch();
  87
  88     return NS_OK;
  89   }
  90
  91   SecurityPolicyViolationEventInit violationEventInit;
  92   if (NS_WARN_IF(!violationEventInit.Init(aJSON))) {
  93     return NS_ERROR_UNEXPECTED;
  94   }
  95
  96   RefPtr<mozilla::dom::Event> event =
  97       mozilla::dom::SecurityPolicyViolationEvent::Constructor(
  98           workerPrivate->GlobalScope(), u"securitypolicyviolation"_ns,
  99           violationEventInit);
 100   event->SetTrusted(true);
 101
 102   workerPrivate->GlobalScope()->DispatchEvent(*event);
 103
 104   return NS_OK;
 105 }