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Issue 29333518: Issue 3515 - Added polyfill for the fetch() API (Closed)
Patch Set: Rebased Created Jan. 19, 2016, 1:09 p.m.
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1 /*
2 * This file is part of Adblock Plus <https://adblockplus.org/>,
3 * Copyright (C) 2006-2015 Eyeo GmbH
4 *
5 * Adblock Plus is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3 as
7 * published by the Free Software Foundation.
8 *
9 * Adblock Plus is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 "use strict";
19
20 (function(global)
21 {
22 if ("fetch" in global)
23 return;
24
25 function Response(xhr)
26 {
27 this._xhr = xhr;
28 }
29 Response.prototype = {
30 get ok()
31 {
32 return this._xhr.status >= 200 && this._xhr.status <= 299;
33 },
34 text: function()
35 {
36 return Promise.resolve(this._xhr.responseText);
37 }
38 };
39
40 global.fetch = function(url)
41 {
42 return new Promise(function(resolve, reject)
43 {
44 var xhr = new XMLHttpRequest();
45
46 xhr.onload = function()
47 {
48 resolve(new Response(xhr));
49 };
50
51 xhr.onerror = xhr.onabort = function()
52 {
53 reject(new TypeError("Failed to fetch"));
54 };
55
56 xhr.overrideMimeType("text/plain");
57 xhr.open("GET", url);
58 xhr.send();
59 });
60 };
61 })(this);
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