The Tor Browser: toolkit/forgetaboutsite/ForgetAboutSite.jsm@6474c204b198 (annotated)

toolkit/forgetaboutsite/ForgetAboutSite.jsm@6474c204b198 (annotated)

toolkit/forgetaboutsite/ForgetAboutSite.jsm

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 Components.utils.import("resource://gre/modules/Services.jsm");
 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
 Components.utils.import("resource://gre/modules/NetUtil.jsm");
 Components.utils.import("resource://gre/modules/Task.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils",
                                   "resource://gre/modules/PlacesUtils.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "Downloads",
                                   "resource://gre/modules/Downloads.jsm");
 this.EXPORTED_SYMBOLS = ["ForgetAboutSite"];
 /**
  * Returns true if the string passed in is part of the root domain of the
  * current string.  For example, if this is "www.mozilla.org", and we pass in
  * "mozilla.org", this will return true.  It would return false the other way
  * around.
  */
 function hasRootDomain(str, aDomain)
 {
   let index = str.indexOf(aDomain);
   // If aDomain is not found, we know we do not have it as a root domain.
   if (index == -1)
     return false;
   // If the strings are the same, we obviously have a match.
   if (str == aDomain)
     return true;
   // Otherwise, we have aDomain as our root domain iff the index of aDomain is
   // aDomain.length subtracted from our length and (since we do not have an
   // exact match) the character before the index is a dot or slash.
   let prevChar = str[index - 1];
   return (index == (str.length - aDomain.length)) &&
          (prevChar == "." || prevChar == "/");
 }
 const Cc = Components.classes;
 const Ci = Components.interfaces;
 const Cu = Components.utils;
 this.ForgetAboutSite = {
   removeDataFromDomain: function CRH_removeDataFromDomain(aDomain)
   {
     PlacesUtils.history.removePagesFromHost(aDomain, true);
     // Cache
     let (cs = Cc["@mozilla.org/netwerk/cache-storage-service;1"].
               getService(Ci.nsICacheStorageService)) {
       // NOTE: there is no way to clear just that domain, so we clear out
       //       everything)
       try {
         cs.clear();
       } catch (ex) {
         Cu.reportError("Exception thrown while clearing the cache: " +
           ex.toString());
       }
     }
     // Image Cache
     let (imageCache = Cc["@mozilla.org/image/tools;1"].
                       getService(Ci.imgITools).getImgCacheForDocument(null)) {
       try {
         imageCache.clearCache(false); // true=chrome, false=content
       } catch (ex) {
         Cu.reportError("Exception thrown while clearing the image cache: " +
           ex.toString());
       }
     }
     // Cookies
     let (cm = Cc["@mozilla.org/cookiemanager;1"].
               getService(Ci.nsICookieManager2)) {
       let enumerator = cm.getCookiesFromHost(aDomain);
       while (enumerator.hasMoreElements()) {
         let cookie = enumerator.getNext().QueryInterface(Ci.nsICookie);
         cm.remove(cookie.host, cookie.name, cookie.path, false);
       }
     }
     // Plugin data
     const phInterface = Ci.nsIPluginHost;
     const FLAG_CLEAR_ALL = phInterface.FLAG_CLEAR_ALL;
     let (ph = Cc["@mozilla.org/plugin/host;1"].getService(phInterface)) {
       let tags = ph.getPluginTags();
       for (let i = 0; i < tags.length; i++) {
         try {
           ph.clearSiteData(tags[i], aDomain, FLAG_CLEAR_ALL, -1);
         } catch (e) {
           // Ignore errors from the plugin
         }
       }
     }
     // Downloads
     let useJSTransfer = false;
     try {
       // This method throws an exception if the old Download Manager is disabled.
       Services.downloads.activeDownloadCount;
     } catch (ex) {
       useJSTransfer = true;
     }
     if (useJSTransfer) {
       Task.spawn(function() {
         let list = yield Downloads.getList(Downloads.ALL);
         list.removeFinished(download => hasRootDomain(
              NetUtil.newURI(download.source.url).host, aDomain));
       }).then(null, Cu.reportError);
     }
     else {
       let (dm = Cc["@mozilla.org/download-manager;1"].
                 getService(Ci.nsIDownloadManager)) {
         // Active downloads
         for (let enumerator of [dm.activeDownloads, dm.activePrivateDownloads]) {
           while (enumerator.hasMoreElements()) {
             let dl = enumerator.getNext().QueryInterface(Ci.nsIDownload);
             if (hasRootDomain(dl.source.host, aDomain)) {
               dl.cancel();
               dl.remove();
             }
           }
         }
         function deleteAllLike(db) {
           // NOTE: This is lossy, but we feel that it is OK to be lossy here and not
           //       invoke the cost of creating a URI for each download entry and
           //       ensure that the hostname matches.
           let stmt = db.createStatement(
             "DELETE FROM moz_downloads " +
             "WHERE source LIKE ?1 ESCAPE '/' " +
             "AND state NOT IN (?2, ?3, ?4)"
           );
           let pattern = stmt.escapeStringForLIKE(aDomain, "/");
           stmt.bindByIndex(0, "%" + pattern + "%");
           stmt.bindByIndex(1, Ci.nsIDownloadManager.DOWNLOAD_DOWNLOADING);
           stmt.bindByIndex(2, Ci.nsIDownloadManager.DOWNLOAD_PAUSED);
           stmt.bindByIndex(3, Ci.nsIDownloadManager.DOWNLOAD_QUEUED);
           try {
             stmt.execute();
           }
           finally {
             stmt.finalize();
           }
         }
         // Completed downloads
         deleteAllLike(dm.DBConnection);
         deleteAllLike(dm.privateDBConnection);
         // We want to rebuild the list if the UI is showing, so dispatch the
         // observer topic
         let os = Cc["@mozilla.org/observer-service;1"].
                  getService(Ci.nsIObserverService);
         os.notifyObservers(null, "download-manager-remove-download", null);
       }
     }
     // Passwords
     let (lm = Cc["@mozilla.org/login-manager;1"].
               getService(Ci.nsILoginManager)) {
       // Clear all passwords for domain
       try {
         let logins = lm.getAllLogins();
         for (let i = 0; i < logins.length; i++)
           if (hasRootDomain(logins[i].hostname, aDomain))
             lm.removeLogin(logins[i]);
       }
       // XXXehsan: is there a better way to do this rather than this
       // hacky comparison?
       catch (ex if ex.message.indexOf("User canceled Master Password entry") != -1) { }
       // Clear any "do not save for this site" for this domain
       let disabledHosts = lm.getAllDisabledHosts();
       for (let i = 0; i < disabledHosts.length; i++)
         if (hasRootDomain(disabledHosts[i], aDomain))
           lm.setLoginSavingEnabled(disabledHosts, true);
     }
     // Permissions
     let (pm = Cc["@mozilla.org/permissionmanager;1"].
               getService(Ci.nsIPermissionManager)) {
       // Enumerate all of the permissions, and if one matches, remove it
       let enumerator = pm.enumerator;
       while (enumerator.hasMoreElements()) {
         let perm = enumerator.getNext().QueryInterface(Ci.nsIPermission);
         if (hasRootDomain(perm.host, aDomain))
           pm.remove(perm.host, perm.type);
       }
     }
     // Offline Storages
     let (qm = Cc["@mozilla.org/dom/quota/manager;1"].
               getService(Ci.nsIQuotaManager)) {
       // delete data from both HTTP and HTTPS sites
       let caUtils = {};
       let scriptLoader = Cc["@mozilla.org/moz/jssubscript-loader;1"].
                          getService(Ci.mozIJSSubScriptLoader);
       scriptLoader.loadSubScript("chrome://global/content/contentAreaUtils.js",
                                  caUtils);
       let httpURI = caUtils.makeURI("http://" + aDomain);
       let httpsURI = caUtils.makeURI("https://" + aDomain);
       qm.clearStoragesForURI(httpURI);
       qm.clearStoragesForURI(httpsURI);
     }
     function onContentPrefsRemovalFinished() {
       // Everybody else (including extensions)
       Services.obs.notifyObservers(null, "browser:purge-domain-data", aDomain);
     }
     // Content Preferences
     let cps2 = Cc["@mozilla.org/content-pref/service;1"].
                getService(Ci.nsIContentPrefService2);
     cps2.removeBySubdomain(aDomain, null, {
       handleCompletion: function() onContentPrefsRemovalFinished(),
       handleError: function() {}
     });
     // Predictive network data - like cache, no way to clear this per
     // domain, so just trash it all
     let ns = Cc["@mozilla.org/network/seer;1"].
              getService(Ci.nsINetworkSeer);
     ns.reset();
   }
 };

The Tor Browser / annotate

toolkit/forgetaboutsite/ForgetAboutSite.jsm@6474c204b198 (annotated)

toolkit/forgetaboutsite/ForgetAboutSite.jsm