Node.js simplest code not working

Question

As I am a newbie to Node.js and is learning from different articles. So, far I have learnt, my code is

At server side with app.js

var http = require('http');

var app = http.createServer(function(req,res)
{
    req.on('end',function()
    {
        res.writeHead(200, {'Content-Type': 'text/plain'});
        res.end('Hello');
    });
});

var io = require('socket.io').listen(app);

io.sockets.on('connection',function(socket)
{
    socket.emit('connect',{msg:'Hello Client'});
    socket.on('client_Says',console.log);
});

app.listen(3000);

At client side with index.html

<script type="text/javascript" src="//localhost:3000/socket.io/socket.io.js"></script>
<script type="text/javascript">
var socket = io.connect('//localhost:3000');
socket.on('connect',function(data)
{
    alert('Server says '+data.msg);
    socket.emit('client_Says',{data:'Hello Server'});
});
</script>

What is that I am doing wrong in above code? When I run app.js in console, it says info - socket.io started but when I run http://localhost:3000 it just keep requesting server.

plus I want to know that is it true that wherever on my pc I create my folder for Node and place app.js and index.html files like above in it and run http://localhost:3000 in browser will automatically make that folder my site folder for localhost after running app.js in Node console?

Answer 1

In your app.js update code to this

 var http = require('http'),
     fs = require('fs'), //<--- File Module
     index = fs.readFileSync(__dirname + '/index.html');

 var app = http.createServer(function(req,res)
 {
      res.writeHead(200, {'Content-Type': 'text/html'}); //<-Updated to text/html
      res.end(index); //<---I am sending page
 });

Hope that solves your problem

Answer 2

You're not supposed to do this on server side:

socket.emit('connect',{msg:'Hello Client'});

because connect is a default event which is emitted on a successful connection from the server. So when a client connects, the server fires its default 'connect' event, but here you're also triggering your event named connect which might be causing problem.