dom/base/nsIScriptChannel.idl

   1 /* -*- Mode: IDL; 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/. */
   5
   6 #include "nsISupports.idl"
   7
   8 /**
   9  * An interface representing a channel which will have to execute some sort of
  10  * program provided via its URI to compute the data it should return.
  11  *
  12  * If a channel implements this interface, the execution of the program in
  13  * question will be restricted in the following ways:
  14  *
  15  * - If the channel does not have an owner principal, the program will not be
  16  *   executed at all, no matter what.  This is necessary because in this
  17  *   circumstance we have no way to tell whether script execution is allowed at
  18  *   all for the originating security context of this channel.
  19  * - If the channel has an owner principal, how it is executed is controlled by
  20  *   this interface.  However if the owner principal does not subsume the
  21  *   principal of the environment in which the program is to be executed the
  22  *   execution will be forced to happen in a sandbox.
  23  */
  24 [scriptable, uuid(33234b99-9588-4c7d-9da6-86b8b7cba565)]
  25 interface nsIScriptChannel : nsISupports
  26 {
  27   /**
  28    * Possible ways of executing the program.
  29    */
  30
  31   /**
  32    * Don't execute at all.
  33    */
  34   const unsigned long NO_EXECUTION = 0;
  35
  36   /**
  37    * There used to be an EXECUTE_IN_SANDBOX = 1 value.  It has been removed, but
  38    * we're not changing the value of EXECUTE_NORMAL to avoid breaking compat.
  39    */
  40
  41   /**
  42    * Execute against the target environment if the principals allow it.
  43    */
  44   const unsigned long EXECUTE_NORMAL = 2;
  45
  46   /**
  47    * Whether and how the program represented by this channel is to be executed.
  48    * The default value if this property has never been set on this channel MUST
  49    * be either EXECUTE_IN_SANDBOX or NO_EXECUTION.
  50    *
  51    * @throws NS_ERROR_INVALID_ARG when set to an unrecognized value.
  52    */
  53   attribute unsigned long executionPolicy;
  54
  55   /**
  56    * Control whether the program should be executed synchronosly when
  57    * the channel's AsyncOpen method is called or whether it should be
  58    * executed asynchronously.  In both cases, any data that the
  59    * channel returns will be returned asynchronously; the only thing
  60    * this property affects is when the program executes.
  61    *
  62    * The default value of this property is TRUE.
  63    *
  64    * Setting this property after asyncOpen has been called on the
  65    * channel has no effect.
  66    */
  67   attribute boolean executeAsync;
  68 };