telnet.js

//Server
var net = require('net');
var server = net.createServer(function(connection) {
    console.log('client connected');

    connection.on('data', function(data) {
        console.log(data.toString());
    });

    connection.on('end', function() {
        console.log('client disconnected');
    });
    connection.write(connection.remoteAddress + ':' + connection.remotePort + ' connected to server! \r\n');
    connection.pipe(connection);
});
server.listen(8080, function() {
    console.log('server is listening');
});


//Client
var net = require('net');
var client = net.connect({port: 8080}, function() {
    console.log('connected to server!');
    client.write('123456');
});
client.on('data', function(data) {
    console.log(data.toString());
    client.end();
});
client.on('end', function() {
    console.log('disconnected from server');
});




//not work
var net = require('net');

const readline = require('readline');

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    terminal: false
});

var params = {};

rl.on('line', function(line){
    if (!line.charCodeAt(0)) {

        var client = new net.Socket();

        client.connect(params.port, params.ip, function() {
            client.write('GET / HTTP/1.1');
        });

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

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

        client.on('error', function(err) {
            console.log(err);
        })
    }
});

rl.question('Enter ip-address please: ', function (answer) {
    params.ip = answer;
    rl.question('Enter port please: ', function (answer) {
        params.port = answer;
    });
});







var net = require('net');

const readline = require('readline');

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    terminal: false
});
var params = {};

var arg =[];

var client = new net.Socket();

process.argv.forEach(function (val) {
    arg.push(val);
});

var ip = arg[2];
var port = arg[3];

client.connect(port, ip, function() {
    client.write('GET / HTTP/1.1/n/n');
});

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

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

client.on('error', function(err) {
    console.log(err);
});


// rl.on('line', function(line){
//     if (!line.charCodeAt(0)) {
//
//
//     }
// });

// rl.question('Enter ip-address please: ', function (answer) {
//     params.ip = answer;
//     rl.question('Enter port please: ', function (answer) {
//         params.port = answer;
//     });
// });