components/content-policy.js

   1 /**
   2  * (C) Copyright 2010 John J. Foerch
   3  *
   4  * Use, modification, and distribution are subject to the terms specified in the
   5  * COPYING file.
   6 **/
   7
   8 const Cc = Components.classes;
   9 const Ci = Components.interfaces;
  10 const Cu = Components.utils;
  11 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
  12
  13 var content_policy_listener;
  14
  15 function content_policy () {
  16     this.conkeror = Cc["@conkeror.mozdev.org/application;1"]
  17         .getService()
  18         .wrappedJSObject;
  19     this.conkeror.define_hook("content_policy_hook", "RUN_HOOK_UNTIL_SUCCESS");
  20     this.conkeror.define_variable("content_policy_scheme_whitelist",
  21         { about: true, chrome: true, data: true, javascript: true,
  22           mailto: true, "moz-icon": true },
  23         "Requests whose scheme is in this structure (with a true value) "+
  24         "will be whitelisted before calling content_policy_hook.");
  25     this.conkeror.content_policy_listener = this;
  26 }
  27 content_policy.prototype = {
  28     QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPolicy,
  29                                            Ci.nsIObserverService]),
  30     contractID: "@conkeror.org/content-policy-listener;1",
  31     classID: Components.ID("{2926dd11-4d76-4965-bcdc-4aaad70ada04}"),
  32     classDescription: "content_policy",
  33     _xpcom_factory: {
  34         createInstance: function (outer, iid) {
  35             if (outer)
  36                 throw Cr.NS_ERROR_NO_AGGREGATION;
  37             if (! content_policy_listener)
  38                 content_policy_listener = new content_policy();
  39             return content_policy_listener;
  40         }
  41     },
  42     _xpcom_categories: [{category: "content-policy"}],
  43
  44     enabled: true,
  45     shouldLoad: function (content_type,     //unsigned long
  46                           content_location, //nsIURI
  47                           request_origin,   //nsIURI
  48                           context,          //nsISupports
  49                           mime_type_guess,  //ACString
  50                           extra)            //nsISupports
  51     {
  52         if (this.enabled) {
  53             if (this.conkeror.content_policy_scheme_whitelist[content_location.scheme])
  54                 return Ci.nsIContentPolicy.ACCEPT;
  55             var action = this.conkeror.content_policy_hook.run(
  56                 content_type, content_location, request_origin,
  57                 context, mime_type_guess, extra);
  58         }
  59         return (action || Ci.nsIContentPolicy.ACCEPT);
  60     },
  61     shouldProcess: function (content_type,     //unsigned long
  62                              content_location, //nsIURI
  63                              request_origin,   //nsIURI
  64                              context,          //nsISupports
  65                              mime_type,        //ACString
  66                              extra)            //nsISupports
  67     {
  68         return Ci.nsIContentPolicy.ACCEPT;
  69     }
  70 };
  71
  72 if (XPCOMUtils.generateNSGetFactory)
  73     var NSGetFactory = XPCOMUtils.generateNSGetFactory([content_policy]); //XULRunner 2.0
  74 else
  75     var NSGetModule = XPCOMUtils.generateNSGetModule([content_policy]);