gecko-dev/devtools/shared/indexed-db.js

53 строки
1.7 KiB
JavaScript

/* 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";
/**
* This indexedDB helper is a simplified version of sdk/indexed-db. It creates a DB with
* a principal dedicated to DevTools.
*/
const { Cc, Ci } = require("chrome");
const PSEUDOURI = "indexeddb://fx-devtools";
const principaluri = Cc["@mozilla.org/network/io-service;1"]
.getService(Ci.nsIIOService).newURI(PSEUDOURI);
const ssm = Cc["@mozilla.org/scriptsecuritymanager;1"]
.getService(Ci.nsIScriptSecurityManager);
const principal = ssm.createCodebasePrincipal(principaluri, {});
/**
* Create the DevTools dedicated DB, by relying on the real indexedDB object passed as a
* parameter here.
*
* @param {IDBFactory} indexedDB
* Real indexedDB object.
* @return {Object} Wrapper object that implements IDBFactory methods, but for a devtools
* specific principal.
*/
exports.createDevToolsIndexedDB = function (indexedDB) {
return Object.freeze({
/**
* Only the standard version of indexedDB.open is supported.
*/
open(name, version) {
let options = { storage: "persistent" };
if (typeof version === "number") {
options.version = version;
}
return indexedDB.openForPrincipal(principal, name, options);
},
/**
* Only the standard version of indexedDB.deleteDatabase is supported.
*/
deleteDatabase(name) {
return indexedDB.deleteForPrincipal(principal, name, { storage: "persistent" });
},
cmp: indexedDB.cmp.bind(indexedDB),
});
};