A simple fake redis server written in node.

nodis.js

var net = require('net');
var _dict = {};

// Start a TCP Server
net.createServer(function (socket) {
  socket.write("Welcome to Nodis!\n");

  // Handle incoming messages from clients.
  socket.on('data', function (data) {
    data = data.toString().replace(/[\r\n]/g, '').split(' ');
    processCommand(data, socket);
  });
}).listen(5000);

// Put a friendly message on the terminal of the server.
console.log("Nodis running at port 5000\n");

function processCommand(argv, socket) {
  var replyValue;
  argv[0] = argv[0].toUpperCase();
  if (argv[0] === 'SET') {
    _dict[argv[1]] = argv[2];
    socket.write("OK\n");
  } else if (argv[0] === 'GET') {
    replyValue = _dict[argv[1]];
    socket.write((replyValue ? replyValue : '(nil)') + "\n");
  }
}