65 lines
1.9 KiB
JavaScript
65 lines
1.9 KiB
JavaScript
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const net = require('net')
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/**
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* Retrieves the status of a minecraft server.
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*
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* @param {string} address The server address.
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* @param {number} port Optional. The port of the server. Defaults to 25565.
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* @returns {Promise.<Object>} A promise which resolves to an object containing
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* status information.
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*/
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exports.getStatus = function(address, port = 25565){
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if(port == null || port == ''){
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port = 25565
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}
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if(typeof port === 'string'){
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port = parseInt(port)
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}
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return new Promise((resolve, reject) => {
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const socket = net.connect(port, address, () => {
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let buff = new Buffer([0xFE, 0x01])
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socket.write(buff)
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})
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socket.setTimeout(2500, () => {
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socket.end()
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reject({
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code: 'ETIMEDOUT',
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errno: 'ETIMEDOUT',
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address,
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port
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})
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})
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socket.on('data', (data) => {
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if(data != null && data != ''){
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let server_info = data.toString().split('\x00\x00\x00')
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const NUM_FIELDS = 6
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if(server_info != null && server_info.length >= NUM_FIELDS){
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resolve({
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online: true,
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version: server_info[2].replace(/\u0000/g, ''),
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motd: server_info[3].replace(/\u0000/g, ''),
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onlinePlayers: server_info[4].replace(/\u0000/g, ''),
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maxPlayers: server_info[5].replace(/\u0000/g,'')
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})
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} else {
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resolve({
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online: false
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})
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}
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}
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socket.end()
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})
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socket.on('error', (err) => {
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socket.destroy()
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reject(err)
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// ENOTFOUND = Unable to resolve.
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// ECONNREFUSED = Unable to connect to port.
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})
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})
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}
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