To do a chat like Facebook

Don't poll, use sockets.io or something to use web sockets.

Ok, i will look this. But it's hardcore to install this. I follow their instruction and it's don't work. You have a good tutorial for this ?

It is not that difficult, just visit http://socket.io/get-started/chat/ and get started.  The code for this chat example is at https://github.com/guille/chat-example

How difficult is this
var io = require('socket.io')(80);
io.emit('message', 'Hello World!');

Keep in mind that socket.io is for node.JS

Using web sockets is a bit different and a bit more coding.  Look at https://www.websocket.org/echo.html for a simple example

If you want an ASP.Net method, then check out signalR at http://www.asp.net/signalr/

Either way, just don't be intimidated by the code

I follow like they say but i don't sucess.

The first step it's ok :

{
  "name": "socket-chat-example",
  "version": "0.0.1",
  "description": "my first socket.io app",
  "dependencies": {}
}

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The second step too:

npm install --save express@4.10.2

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but the third and fourth step don't work :

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

app.get('/', function(req, res){
  res.send('<h1>Hello world</h1>');
});

http.listen(3000, function(){
  console.log('listening on *:3000');
});

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i don't access at the page "hello world" when i do localhost:3000.

Sorry, first time i try to install this and it's seems very complicated for me.

Sorry, i will try it and give a back fast. Thank for your answer.

Hello, sorry for waiting.  When i write npm install socket.io, i have many bug coming. I see many video to do this and i have always the same bug.
When i do npm install, i have error.

Have you check about Asp.Net SignalR?
ASP.NET SignalR is a new library for ASP.NET developers that makes developing real-time web functionality easy. SignalR allows bi-directional communication between server and client. Servers can now push content to connected clients instantly as it becomes available. SignalR supports Web Sockets, and falls back to other compatible techniques for older browsers. SignalR includes APIs for connection management (for instance, connect and disconnect events), grouping connections, and authorization.

You can check ready example available at
http://www.codeproject.com/Articles/562023/Asp-Net-SignalR-Chat-Room
http://www.codeproject.com/Articles/889257/Chat-Application-using-ASP-NET-SignalR

Yes, of course, i saw it. But at the moment, i work with PHP so... :). But SignalR seems to be very good also for developper's ASP.

Hi,
For Realtime web application in PHP, you could try Ratchet, Socket.IO, or SockJS library.

For more in details about that, please refer:  https://entwickler.de/webandphp/building-realtime-web-apps-with-php-125787.html

Hi,
I want use Socket.IO but i don't success to install it. Many bugs all time.