dom/ipc/PermissionMessageUtils.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 "mozilla/dom/PermissionMessageUtils.h"
   8 #include "mozilla/ipc/BackgroundUtils.h"
   9 #include "mozilla/ipc/PBackgroundSharedTypes.h"
  10 #include "nsCOMPtr.h"
  11 #include "nsIPrincipal.h"
  12
  13 namespace mozilla::ipc {
  14
  15 void IPDLParamTraits<nsIPrincipal*>::Write(IPC::MessageWriter* aWriter,
  16                                            IProtocol* aActor,
  17                                            nsIPrincipal* aParam) {
  18   Maybe<PrincipalInfo> info;
  19   if (aParam) {
  20     info.emplace();
  21     nsresult rv = PrincipalToPrincipalInfo(aParam, info.ptr());
  22     MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
  23   }
  24
  25   WriteIPDLParam(aWriter, aActor, info);
  26 }
  27
  28 bool IPDLParamTraits<nsIPrincipal*>::Read(IPC::MessageReader* aReader,
  29                                           IProtocol* aActor,
  30                                           RefPtr<nsIPrincipal>* aResult) {
  31   Maybe<PrincipalInfo> info;
  32   if (!ReadIPDLParam(aReader, aActor, &info)) {
  33     return false;
  34   }
  35
  36   if (info.isNothing()) {
  37     return true;
  38   }
  39
  40   auto principalOrErr = PrincipalInfoToPrincipal(info.ref());
  41
  42   if (NS_WARN_IF(principalOrErr.isErr())) {
  43     return false;
  44   }
  45
  46   nsCOMPtr<nsIPrincipal> principal = principalOrErr.unwrap();
  47   *aResult = principal;
  48   return true;
  49 }
  50
  51 }  // namespace mozilla::ipc