indexed-db.js (1330B)
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 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 "use strict"; 6 7 /** 8 * This indexedDB helper is a simplified version of sdk/indexed-db. It creates a DB with 9 * a principal dedicated to DevTools. 10 */ 11 12 const PSEUDOURI = "indexeddb://fx-devtools"; 13 const principaluri = Services.io.newURI(PSEUDOURI); 14 const principal = Services.scriptSecurityManager.createContentPrincipal( 15 principaluri, 16 {} 17 ); 18 19 // indexedDB is only exposed to document globals. 20 // We are retrieving an instance from a Sandbox, which has to be loaded 21 // from the system principal in order to avoid having wrappers around 22 // all indexed DB objects. 23 const systemPrincipal = Services.scriptSecurityManager.getSystemPrincipal(); 24 const sandbox = Cu.Sandbox(systemPrincipal, { 25 wantGlobalProperties: ["indexedDB"], 26 }); 27 const { indexedDB } = sandbox; 28 29 module.exports = Object.freeze({ 30 open(name, version) { 31 const options = {}; 32 if (typeof version === "number") { 33 options.version = version; 34 } 35 return indexedDB.openForPrincipal(principal, name, options); 36 }, 37 38 deleteDatabase(name) { 39 return indexedDB.deleteForPrincipal(principal, name); 40 }, 41 42 cmp: indexedDB.cmp.bind(indexedDB), 43 });