45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
/*
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* Copyright (C) 2017-2020 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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function requestText(url, action, params) {
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return new Promise((resolve, reject) => {
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const xhr = new XMLHttpRequest();
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xhr.overrideMimeType('text/plain');
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xhr.addEventListener('load', () => resolve(xhr.responseText));
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xhr.addEventListener('error', () => reject(new Error('Failed to connect')));
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xhr.open(action, url);
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if (params) {
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xhr.send(JSON.stringify(params));
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} else {
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xhr.send();
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}
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});
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}
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async function requestJson(url, action, params) {
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const responseText = await requestText(url, action, params);
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try {
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return JSON.parse(responseText);
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} catch (e) {
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const error = new Error(`Invalid response (${e.message || e})`);
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error.data = {url, action, params, responseText};
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throw error;
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}
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}
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