Server - Client TCP [node.js]

client.js

/*
========
Client
========
*/
var net = require('net');

const HOST = '127.0.0.1';
const PORT = 8888;

var client = new net.Socket();
client.connect(PORT, HOST, function() {
	console.log('Connected');
	client.write('Hello, server! Love, Client.');
});

/* Add a 'data' event handler for the client socket
data is what the server sent to this socket */
client.on('data', function(data) {
	console.log('Received: ' + data);
	client.destroy(); // kill client after server's response
});

// Add a 'close' event handler for the client socket
client.on('close', function() {
	console.log('Connection closed');
});

server.js

/*
========
Server
========
*/
var net = require('net');

var server = net.createServer(function(socket) {
	console.log('Connected: ' + socket.remoteAddress + ':' + socket.remotePort);
	socket.write('Echo server\r\n');
	socket.pipe(socket);
	
	// Add a 'data' event handler to this instance of socket
    socket.on('data', function (data) {

        console.log('data ' + socket.remoteAddress + ': ' + data);
        // Write the data back to the socket
        socket.write('You said "' + data + '"');
    });

    // Add a 'close' event handler to this instance of socket
    socket.on('close', function (data) {
        console.log('Close: ' + socket.remoteAddress + ' ' + socket.remotePort);
    });
});

    

    // Add a 'error' event handler to this instance of socket
    server.on('error', (e) => {
        // error example
        if (e.code === 'EADDRINUSE') {
          console.log('Address in use, retrying...');
          setTimeout(() => {
            server.close();
            server.listen(8888, function () {
                console.log('server listening to %j', server.address());
            });
          }, 1000);
        }
      });


server.listen(8888, function () {
    console.log('server listening to %j', server.address());
});