cs.js

var HOST, createServer, g, net;

net = require("net");

HOST = "127.0.0.1";

createServer = function(port) {
  net.createServer(function(sock) {
    sock.write("welcome!  on port " + port + "\r\n");
    console.log("CONNECTED: " + sock.remoteAddress + ":" + sock.remotePort);
    while (true) {
      sock.write("hello\r\n");
    }
  }).listen(port, HOST);
  console.log("server listening on " + port);
};

createServer(7001);

g = net.createConnection(7001, HOST);

g.on("data", function(data) {
  console.log("got " + data);
});