Implementing socket connection between NodeJS and AngularJS

Posted By : Vivek Joshi | 02-Sep-2017

nodejs

For Implementing socket connection between client and server using nodejs these are the steps

Step 1:- First we have to create a socket server in server side using socket.io package of nodejs

Step 2:- Download socket.io package.

npm install socket.io

Step 3:- Using with expressjs module create server socket connection

var app = require('express')();
var server = require('http').Server(app);
var io = require('socket.io')(server);

server.listen(8080);
io.on('connection', function (socket) {
console.log('A user connected');

	//Whenever someone disconnects this piece of code executed
	socket.on('disconnect', function () {
		console.log('A user disconnected');
	});
	socket.on('message', function (message) {
console.log("message received""+message);
});

		socket.broadcast.emit("sendMessage", "message from server");
	})

Step 4:- Create click side connection and send or receive message from server.

client (index.html)

<script src="/socket.io/socket.io.js">
<!--make sure that client app and server app is running in same port if not then add dependency with hole url e.g (src="http://www.abc.com/socket.io/socket.io.js"-->
</script>
<script>
//if click and server not running in same port then specify port also e.g 'http://localhost:8080'
  var socket = io.connect('http://localhost');


  socket.on('sendMessage', function (data) {
	//receive message from server or other clickt who is emiting with name 'sendMessage'
    console.log(data);
    
  });
//this is use for sending message from the client to server or other client with is listing this message 
socket.emit('message',"send message from client" );

</script>