Reading Data from Input Stream CLI - NodeJS

I am reading a book "Node.js in Action" and trying out examples from it. One of the example which creates a channel from "net" and then creates a channel for all connections and broadcasts messages to other connections/channels.

var events = require('events');
var net = require('net');

var channel = new events.EventEmitter();
channel.clients = {};
channel.subscriptions = {};

channel.on('join', function (id, client) {
    this.clients[id] = client;
    this.subscriptions[id] = function (senderId, message) {
        if (id !== senderId) {
            this.clients[id].write(message);
        }
    };
    this.on('broadcast', this.subscriptions[id]);
});

channel.on('leave', function(id) {
  channel.removeListener('broadcast', this.subscriptions[id]);
  channel.emit('broadcast', id, id + " has left the chat. \n");
});

channel.on('shutdown', function() {
  channel.emit('broadcast', '', "Chat has shut down.!\n");
  channel.removeAllListeners('broadcast');
});

var server = net.createServer(function (client) {
    var id = client.remoteAddress + ':' + client.remotePort;
    //client.on('connect', function () {
    channel.emit('join', id, client);
    //});
    client.on('data', function (data) {
        data = data.toString();
        if(data == "shutdown\r\n") {
            channel.emit('shutdown');
        }
        channel.emit('broadcast', id, data);
    });
    client.on('close', function() {
      channel.emit('leave', id);
    });
});

server.listen(8888);

Now if you look at the following code:

client.on('data', function (data) {
    data = data.toString();
    if(data == "shutdown\r\n") {
        channel.emit('shutdown');
    }
    channel.emit('broadcast', id, data);
});

it reads data from command line when you connect to this server by using telnet using following command:

telnet 127.0.0.1 8888

and you can connect from multiple terminals/shells to this server running on localhost port 8888 but when it comes to reading input stream from telnet - it reads data as soon as user enters it. So if I want to detect a string "shutdown" with carriage return and line feed (\r\n) I am not able to do it because callback function gets called with each keystroke, so what you get is "s" "h" "u" "t" ... "n" as individual characters and not as a string buffer.

I read in APIs that there is flowing mode and pause mode but not sure how to implement it here.

There was another example in book where I encountered and I fixed it by comparing it with character-code and manually buffering till I encounter carriage-return key but I am looking forward to a better solution and preferably if node.js has something to offer.

var net = require('net');

var line = '';
var server = net.createServer(function(socket) {
  socket.on('data', function(data) {
    if(data.toString().charCodeAt(0) != 13){
      line += data.toString();
    } else {
      //console.log('OO');
      socket.write(">>");
      socket.write(line);
      socket.write("\r\n");
      line = '';
    }
  });

  socket.once('data', function(data) {
    socket.write("Hey first time I always stay little reluctant..! Lolz!");
  })
});

server.listen(88);

Above code is the fix which I used for another example where I ran into similar problem but I want to know standard approach to fix this.