So do you want to develop a web based chat application.
First of all I want to tell you something about
So what is Comet?
Its a technology to push the data to Client from the Server in a Web Environment.
However a general web based application supports request/response model that is first the client requests than the server gives the response.
But we need the opposite of this.......................Server response without the client's request. There are various ways you can do this thing and a lot of implementation are