除了我自己的客户端代码之外，如何防止访问URL？

I am using ASP.NET MVC with heavy jQuery client-side interaction. I have a jQuery chat window that polls the server at regular 7 second intervals to fetch updates. All of this works great, I have two action methods for handling the two main functions of the chat; one method is used to post messages to the chat and the other is used to retrieve updates.I am using ASP.NET MVC with heavy jQuery client