gecko-dev/browser/modules/Sanitizer.jsm

# -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
# 
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
# 
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
# 
# The Original Code is the Firefox Sanitizer.
# 
# The Initial Developer of the Original Code is Ben Goodger.
# Portions created by the Initial Developer are Copyright (C) 2005
# the Initial Developer. All Rights Reserved.
# 
# Contributor(s):
#   Ben Goodger <ben@mozilla.org>
# 
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
# 
# ***** END LICENSE BLOCK *****

function Sanitizer() {}
Sanitizer.prototype = {
  clearItem: function (aItemName)
  {
    if (this.items[aItemName].canClear)
      this.items[aItemName].clear();
  },

  canClearItem: function (aItemName)
  {
    return this.items[aItemName].canClear;
  },
  
  _prefDomain: "privacy.item.",
  getNameFromPreference: function (aPreferenceName)
  {
    return aPreferenceName.substr(this._prefDomain.length);
  },
  
  sanitize: function ()
  {
    var psvc = Components.classes["@mozilla.org/preferences-service;1"]
                         .getService(Components.interfaces.nsIPrefService);
    var branch = psvc.getBranch(this._prefDomain);
    for (var itemName in this.items) {
      var item = this.items[itemName];
      if ("clear" in item && item.canClear && branch.getBoolPref(itemName)) 
        item.clear();
    }
  },
  
  items: {
    cache: {
      clear: function ()
      {
        var cacheService = Components.classes["@mozilla.org/network/cache-service;1"]
                                     .getService(Components.interfaces.nsICacheService);
        cacheService.evictEntries(Components.interfaces.nsICache.STORE_ON_DISK);
        cacheService.evictEntries(Components.interfaces.nsICache.STORE_IN_MEMORY);
      },
      
      get canClear()
      {
        return true;
      }
    },
    
    cookies: {
      clear: function ()
      {
        var cookieMgr = Components.classes["@mozilla.org/cookiemanager;1"]
                                  .getService(Components.interfaces.nsICookieManager);
        var e = cookieMgr.enumerator;
        var cookies = [];
        while (e.hasMoreElements()) {
          var cookie = e.getNext().QueryInterface(Components.interfaces.nsICookie);
          cookies.push(cookie);
        }

        for (var i = 0; i < cookies.length; ++i)
          cookieMgr.remove(cookies[i].host, cookies[i].name, cookies[i].path, false);
      },
      
      get canClear()
      {
        var cookieMgr = Components.classes["@mozilla.org/cookiemanager;1"]
                                  .getService(Components.interfaces.nsICookieManager);
        return cookieMgr.enumerator.hasMoreElements();
      }
    },
    
    history: {
      clear: function ()
      {
        var globalHistory = Components.classes["@mozilla.org/browser/global-history;2"]
                                      .getService(Components.interfaces.nsIBrowserHistory);
        globalHistory.removeAllPages();
        
        try {
          var os = Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces.nsIObserverService);
          os.notifyObservers(null, "browser:purge-session-history", "");
        }
        catch (e) { }
      },
      
      get canClear()
      {
        var globalHistory = Components.classes["@mozilla.org/browser/global-history;2"]
                                      .getService(Components.interfaces.nsIBrowserHistory);
        return globalHistory.count != 0;
      }
    },
    
    formdata: {
      clear: function ()
      {
        var formHistory = Components.classes["@mozilla.org/satchel/form-history;1"]
                                    .getService(Components.interfaces.nsIFormHistory);
        formHistory.removeAllEntries();
      },
      
      get canClear()
      {
        var formHistory = Components.classes["@mozilla.org/satchel/form-history;1"]
                                    .getService(Components.interfaces.nsIFormHistory);
        return formHistory.rowCount != 0;
      }
    },
    
    downloads: {
      clear: function ()
      {
        var dlMgr = Components.classes["@mozilla.org/download-manager;1"]
                              .getService(Components.interfaces.nsIDownloadManager);
        dlMgr.cleanUp();
      },

      get canClear()
      {
        var dlMgr = Components.classes["@mozilla.org/download-manager;1"]
                              .getService(Components.interfaces.nsIDownloadManager);
        return dlMgr.canCleanUp;
      }
    },
    
    passwords: {
      clear: function ()
      {
        var pwmgr = Components.classes["@mozilla.org/passwordmanager;1"]
                              .getService(Components.interfaces.nsIPasswordManager);
        var e = pwmgr.enumerator;
        var passwds = [];
        while (e.hasMoreElements()) {
          var passwd = e.getNext().QueryInterface(Components.interfaces.nsIPassword);
          passwds.push(passwd);
        }
        
        for (var i = 0; i < passwds.length; ++i)
          pwmgr.removeUser(passwds[i].host, passwds[i].user);
      },
      
      get canClear()
      {
        var pwmgr = Components.classes["@mozilla.org/passwordmanager;1"]
                              .getService(Components.interfaces.nsIPasswordManager);
        return pwmgr.enumerator.hasMoreElements();
      }
    },
    
    sessions: {
      clear: function ()
      {
        // clear all auth tokens
        var sdr = Components.classes["@mozilla.org/security/sdr;1"]
                            .getService(Components.interfaces.nsISecretDecoderRing);
        sdr.logoutAndTeardown();

        // clear plain HTTP auth sessions
        var authMgr = Components.classes['@mozilla.org/network/http-auth-manager;1']
                                .getService(Components.interfaces.nsIHttpAuthManager);
        authMgr.clearAll();
      },
      
      get canClear()
      {
        return true;
      }
    }
  }
};