uri connection limit(An exceeded user is redirect to a host designated)

when the connecton Designated to the numerical more than which user designated to specific sites (an each uri _ specifed uri site) price, and redirection is a way to a site.

 

 

I am trying to write an irule that will do the following:

 

1) limit the special uri in web servers to 50 connections each.

 

2)any connection after 50 will be redirected ti another site(fallbackhost)

 

3)how to use iRule if http://www.abc.com/uri of web server connected over 50 user, next connection user are connect to fallaback