title: Django url validation
body: <p>HI,</p>
  
  <p>I want to validate my urls whether they are post or get with caring the proper data.So i want to validate these urls before they call to respective views.So i am willing to write the some kind of middleware between view and urls so that i can keep safe the system.I am not aware how do i pass the data through middleware code to view.In middle ware i will write the unittest code.which will validate the urls if valid then will pass to the respective view other wise happy to say 404 .So can any buddy suggest me how do i handle the case.Or may be their is another alternative best way to do this validation.</p>
  
  <p>Thanks to all.</p>