Web Based Chat Application

Figure 1.0

The disadvantages with this solution are:-

• Security settings of the browser can block meta tags.
  
• If the Internet speed is slow then user would not be able to read the messages properly because till the message from the current request are rendered by server the browser would be sending the next request (and use would see frequent flickering of the page.)

What is the Solution?

For the solution we need to understand the Life cycle of the request and response.

Http request response life cycle in a broader view: -

The sequence of action between a browser and server can be shown as below. (Figure 2.0)

Figure 2.0

The Solution

But imagine a condition where the connection would be kept open between a Client - and Web Server, so that whatever is the new data coming on to the server would be send to the client by the server without client asking for it.

And this would be the chat solution.

Server updates the client with the new content without client being asking for the new content.

This could be imagining as below. (Figure 3.0)

Figure 3.0

Technically this would be the page which would have a Meta tag would be changed as a page whose page calculation is never completed on the server - and having buffer disabled for the page.

The code snippet for the same can be as follows.

Response.Buffer=false;
While (true)
{
//Is there Any New Content
//Send New Content
Thread.Sleep (1000);
}

The complete solution is also available for download.