web3.js/lib/httpprovider.js

63 lines
1.9 KiB
JavaScript

/*
This file is part of ethereum.js.
ethereum.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
ethereum.js 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file httpprovider.js
* @authors:
* Marek Kotewicz <marek@ethdev.com>
* Marian Oancea <marian@ethdev.com>
* @date 2014
*/
if (process.env.NODE_ENV !== 'build') {
var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest; // jshint ignore:line
}
var HttpProvider = function (host) {
this.handlers = [];
this.host = host || 'http://localhost:8080';
};
HttpProvider.prototype.send = function (payload, callback) {
var request = new XMLHttpRequest();
request.open('POST', this.host, false);
// ASYNC
if(typeof callback === 'function') {
request.onreadystatechange = function() {
if(request.readyState === 4 && request.status === 200) {
callback(JSON.parse(request.responseText));
}
};
request.open('POST', this.host, true);
request.send(JSON.stringify(payload));
// SYNC
} else {
request.open('POST', this.host, false);
request.send(JSON.stringify(payload));
// check request.status
if(request.status !== 200)
return;
return JSON.parse(request.responseText);
}
};
module.exports = HttpProvider;