The Tor Browser: dom/base/IndexedDBHelper.jsm@129ffea94266 (annotated)

dom/base/IndexedDBHelper.jsm@129ffea94266 (annotated)

dom/base/IndexedDBHelper.jsm

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* 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/. */
 "use strict";
 let DEBUG = 0;
 let debug;
 if (DEBUG) {
   debug = function (s) { dump("-*- IndexedDBHelper: " + s + "\n"); }
 } else {
   debug = function (s) {}
 }
 const Cu = Components.utils;
 const Cc = Components.classes;
 const Ci = Components.interfaces;
 this.EXPORTED_SYMBOLS = ["IndexedDBHelper"];
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.importGlobalProperties(["indexedDB"]);
 this.IndexedDBHelper = function IndexedDBHelper() {}
 IndexedDBHelper.prototype = {
   // Cache the database
   _db: null,
   // Close the database
   close: function close() {
     if (this._db) {
       this._db.close();
       this._db = null;
     }
   },
   /**
    * Open a new database.
    * User has to provide upgradeSchema.
    *
    * @param successCb
    *        Success callback to call once database is open.
    * @param failureCb
    *        Error callback to call when an error is encountered.
    */
   open: function open(aSuccessCb, aFailureCb) {
     let self = this;
     if (DEBUG) debug("Try to open database:" + self.dbName + " " + self.dbVersion);
     let req = indexedDB.open(this.dbName, this.dbVersion);
     req.onsuccess = function (event) {
       if (DEBUG) debug("Opened database:" + self.dbName + " " + self.dbVersion);
       self._db = event.target.result;
       self._db.onversionchange = function(event) {
         if (DEBUG) debug("WARNING: DB modified from a different window.");
       }
       aSuccessCb && aSuccessCb();
     };
     req.onupgradeneeded = function (aEvent) {
       if (DEBUG) {
         debug("Database needs upgrade:" + self.dbName + aEvent.oldVersion + aEvent.newVersion);
         debug("Correct new database version:" + (aEvent.newVersion == this.dbVersion));
       }
       let _db = aEvent.target.result;
       self.upgradeSchema(req.transaction, _db, aEvent.oldVersion, aEvent.newVersion);
     };
     req.onerror = function (aEvent) {
       if (DEBUG) debug("Failed to open database: " + self.dbName);
       aFailureCb && aFailureCb(aEvent.target.error.name);
     };
     req.onblocked = function (aEvent) {
       if (DEBUG) debug("Opening database request is blocked.");
     };
   },
   /**
    * Use the cached DB or open a new one.
    *
    * @param successCb
    *        Success callback to call.
    * @param failureCb
    *        Error callback to call when an error is encountered.
    */
   ensureDB: function ensureDB(aSuccessCb, aFailureCb) {
     if (this._db) {
       if (DEBUG) debug("ensureDB: already have a database, returning early.");
       aSuccessCb && aSuccessCb();
       return;
     }
     this.open(aSuccessCb, aFailureCb);
   },
   /**
    * Start a new transaction.
    *
    * @param txn_type
    *        Type of transaction (e.g. "readwrite")
    * @param store_name
    *        The object store you want to be passed to the callback
    * @param callback
    *        Function to call when the transaction is available. It will
    *        be invoked with the transaction and the `store' object store.
    * @param successCb
    *        Success callback to call on a successful transaction commit.
    *        The result is stored in txn.result.
    * @param failureCb
    *        Error callback to call when an error is encountered.
    */
   newTxn: function newTxn(txn_type, store_name, callback, successCb, failureCb) {
     this.ensureDB(function () {
       if (DEBUG) debug("Starting new transaction" + txn_type);
       let txn = this._db.transaction(Array.isArray(store_name) ? store_name : this.dbStoreNames, txn_type);
       if (DEBUG) debug("Retrieving object store", this.dbName);
       let stores;
       if (Array.isArray(store_name)) {
         stores = [];
         for (let i = 0; i < store_name.length; ++i) {
           stores.push(txn.objectStore(store_name[i]));
         }
       } else {
         stores = txn.objectStore(store_name);
       }
       txn.oncomplete = function (event) {
         if (DEBUG) debug("Transaction complete. Returning to callback.");
         if (successCb) {
           successCb(txn.result);
         }
       };
       txn.onabort = function (event) {
         if (DEBUG) debug("Caught error on transaction");
         /*
          * event.target.error may be null
          * if txn was aborted by calling txn.abort()
          */
         if (failureCb) {
           if (event.target.error) {
             failureCb(event.target.error.name);
           } else {
             failureCb("UnknownError");
           }
         }
       };
       callback(txn, stores);
     }.bind(this), failureCb);
   },
   /**
    * Initialize the DB. Does not call open.
    *
    * @param aDBName
    *        DB name for the open call.
    * @param aDBVersion
    *        Current DB version. User has to implement upgradeSchema.
    * @param aDBStoreName
    *        ObjectStore that is used.
    */
   initDBHelper: function initDBHelper(aDBName, aDBVersion, aDBStoreNames) {
     this.dbName = aDBName;
     this.dbVersion = aDBVersion;
     this.dbStoreNames = aDBStoreNames;
   }
 }

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dom/base/IndexedDBHelper.jsm@129ffea94266 (annotated)

dom/base/IndexedDBHelper.jsm