blob: 94fd135abbd5d2ed5a1dc9af51d1240252730b83 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
/*
* Copyright (C) 2017 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
function requestJson(url, action, params) {
return new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.overrideMimeType('application/json');
xhr.addEventListener('load', () => resolve(xhr.responseText));
xhr.addEventListener('error', () => reject('failed to execute network request'));
xhr.open(action, url);
if (params) {
xhr.send(JSON.stringify(params));
} else {
xhr.send();
}
}).then(responseText => {
try {
return JSON.parse(responseText);
}
catch (e) {
return Promise.reject('invalid JSON response');
}
});
}
|