The Tor Browser: webapprt/DirectoryProvider.js@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

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

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

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 const Cc = Components.classes;

     6 const Ci = Components.interfaces;

     7 const Cu = Components.utils;

     9 const WEBAPP_REGISTRY_DIR = "WebappRegD";

    10 const NS_APP_CHROME_DIR_LIST = "AChromDL";

    12 Cu.import("resource://gre/modules/FileUtils.jsm");

    13 Cu.import("resource://gre/modules/XPCOMUtils.jsm");

    14 Cu.import("resource://webapprt/modules/WebappRT.jsm");

    15 Cu.import("resource://gre/modules/Services.jsm");

    17 function DirectoryProvider() {}

    19 DirectoryProvider.prototype = {

    20   classID: Components.ID("{e1799fda-4b2f-4457-b671-e0641d95698d}"),

    22   QueryInterface: XPCOMUtils.generateQI([Ci.nsIDirectoryServiceProvider,

    23                                          Ci.nsIDirectoryServiceProvider2]),

    25   getFile: function(prop, persistent) {

    26     if (prop == WEBAPP_REGISTRY_DIR) {

    27       let dir = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);

    28       dir.initWithPath(WebappRT.config.registryDir);

    29       return dir;

    30     }

    32     // We return null to show failure instead of throwing an error,

    33     // which works with the way the interface is called (per bug 529077).

    34     return null;

    35   },

    37   getFiles: function(prop, persistent) {

    38     if (prop == NS_APP_CHROME_DIR_LIST) {

    39       return {

    40         _done: false,

    41         QueryInterface: XPCOMUtils.generateQI([Ci.nsISimpleEnumerator]),

    42         hasMoreElements: function() {

    43           return !this._done;

    44         },

    45         getNext: function() {

    46           this._done = true;

    47           return FileUtils.getDir("AppRegD", ["chrome"], false);

    48         }

    49       };

    50     }

    52     return null;

    53   },

    54 };

    56 this.NSGetFactory = XPCOMUtils.generateNSGetFactory([DirectoryProvider]);

The Tor Browser / file revision

webapprt/DirectoryProvider.js@97036ab72558

webapprt/DirectoryProvider.js