The Tor Browser: dom/ipc/PermissionMessageUtils.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "mozilla/dom/PermissionMessageUtils.h"

     7 #include "nsISerializable.h"

     8 #include "nsSerializationHelper.h"

    10 namespace IPC {

    12 void

    13 ParamTraits<Principal>::Write(Message* aMsg, const paramType& aParam) {

    14   bool isNull = !aParam.mPrincipal;

    15   WriteParam(aMsg, isNull);

    16   if (isNull) {

    17     return;

    18   }

    20   bool isSerialized = false;

    21   nsCString principalString;

    22   nsCOMPtr<nsISerializable> serializable = do_QueryInterface(aParam.mPrincipal);

    23   if (serializable) {

    24     nsresult rv = NS_SerializeToString(serializable, principalString);

    25     if (NS_SUCCEEDED(rv)) {

    26       isSerialized = true;

    27     }

    28   }

    30   if (!isSerialized) {

    31     NS_RUNTIMEABORT("Unable to serialize principal.");

    32     return;

    33   }

    35   WriteParam(aMsg, principalString);

    36 }

    38 bool

    39 ParamTraits<Principal>::Read(const Message* aMsg, void** aIter, paramType* aResult)

    40 {

    41   bool isNull;

    42   if (!ReadParam(aMsg, aIter, &isNull)) {

    43     return false;

    44   }

    46   if (isNull) {

    47     aResult->mPrincipal = nullptr;

    48     return true;

    49   }

    51   nsCString principalString;

    52   if (!ReadParam(aMsg, aIter, &principalString)) {

    53     return false;

    54   }

    56   nsCOMPtr<nsISupports> iSupports;

    57   nsresult rv = NS_DeserializeObject(principalString, getter_AddRefs(iSupports));

    58   NS_ENSURE_SUCCESS(rv, false);

    60   nsCOMPtr<nsIPrincipal> principal = do_QueryInterface(iSupports);

    61   NS_ENSURE_TRUE(principal, false);

    63   principal.swap(aResult->mPrincipal);

    64   return true;

    65 }

    67 } // namespace IPC

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