simple tcp server that writes the data posted to it to an output file

app.js

var fs = require('fs'),
    net = require('net');
    
var writeStream = fs.createWriteStream(__dirname + "/outfile.txt");

var server = net.createServer(function (socket) {
    socket.on('data', function(data) {
        socket.write(data);
        writeStream.write(data);
        console.log(data);
    });
});

server.listen(1337, "localhost");
console.log("TCP server listening on port 1337 at localhost.");