43 lines
1.1 KiB
JavaScript
43 lines
1.1 KiB
JavaScript
'use strict'
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const net = require('net')
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let server = null
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let sockets = []
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// cleans the input of carriage return, newline
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const cleanInput = data => data.toString().replace(/(\r\n|\n|\r)/gm, '')
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// executed when data is received from a socket
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const receiveData = (socket, data) => {
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const cleanData = cleanInput(data)
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if (cleanData === "@quit") {
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socket.end('Goodbye!\n')
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} else {
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for (let i = 0; i < sockets.length; i++) {
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if (sockets[i] !== socket) {
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sockets[i].write(data)
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}
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}
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}
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}
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// executed when a socket ends
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const closeSocket = socket => {
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const i = sockets.indexOf(socket)
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if (i != -1) sockets.splice(i, 1)
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}
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// callback method executed when a new TCP socket is opened
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const newSocket = socket => {
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sockets.push(socket)
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socket.write('Welcome to the Telnet server!\n')
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socket.on('data', data => receiveData(socket, data))
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socket.on('end', () => closeSocket(socket))
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}
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// create a new server
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module.exports = (port) => {
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if (server === null) server = net.createServer(newSocket).listen(port)
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return server
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} |