100 lines
2.8 KiB
JavaScript
100 lines
2.8 KiB
JavaScript
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity 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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// Parity 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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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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import { Logging } from '../../subscriptions';
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import JsonRpcBase from '../jsonRpcBase';
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import TransportError from '../error';
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/* global fetch */
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export default class Http extends JsonRpcBase {
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constructor (url, connectTimeout = 1000) {
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super();
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this._connected = true;
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this._url = url;
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this._connectTimeout = connectTimeout;
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this._pollConnection();
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}
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_encodeOptions (method, params) {
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const json = this.encode(method, params);
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this.log(json);
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return {
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method: 'POST',
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headers: {
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'Accept': 'application/json',
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'Content-Type': 'application/json',
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'Content-Length': json.length
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},
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body: json
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};
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}
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execute (method, ...params) {
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const request = this._encodeOptions(method, params);
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return fetch(this._url, request)
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.catch((error) => {
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this._setDisconnected();
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throw error;
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})
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.then((response) => {
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this._setConnected();
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if (response.status !== 200) {
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this._setDisconnected();
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this.error(JSON.stringify({ status: response.status, statusText: response.statusText }));
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console.error(`${method}(${JSON.stringify(params)}): ${response.status}: ${response.statusText}`);
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throw new Error(`${response.status}: ${response.statusText}`);
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}
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return response.json();
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})
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.then((response) => {
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Logging.send(method, params, { request, response });
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if (response.error) {
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this.error(JSON.stringify(response));
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console.error(`${method}(${JSON.stringify(params)}): ${response.error.code}: ${response.error.message}`);
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const error = new TransportError(method, response.error.code, response.error.message);
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throw error;
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}
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this.log(JSON.stringify(response));
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return response.result;
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});
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}
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_pollConnection = () => {
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if (this._connectTimeout <= 0) {
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return;
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}
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const nextTimeout = () => setTimeout(this._pollConnection, this._connectTimeout);
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this
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.execute('net_listening')
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.then(nextTimeout)
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.catch(nextTimeout);
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}
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}
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