client.js

 
/*
And connect with a tcp client from the command line using netcat, the *nix 
utility for reading and writing across tcp/udp network connections. 
$ netcat 127.0.0.1 1337
You should see:
> Echo server
*/

/* Or use this example tcp client written in node.js.  (Originated with 
example code from 
http://www.hacksparrow.com/tcp-socket-programming-in-node-js.html.) */

const net = require('net')

const client = new net.Socket()
client.connect(1337, '127.0.0.1', function () {
	console.log('Connected')
	client.write('Hello, server! Love, Client.')
})

client.on('data', function (data) {
	console.log('Received: ' + data.constructor.name)
	client.destroy() // kill client after server's response
})

client.on('close', function () {
	console.log('Connection closed')
})

server.js

const net = require('net')

const server = net.createServer(function (socket) {
	console.log('連接了：', socket.remotePort)
	socket.on("data", (buffer)=>{
		console.log(buffer.toString())
		socket.write(buffer)
	})
	socket.on("end", ()=>{
		console.log("end 了")
	})
})

server.listen(1345, '127.0.0.1')