title: Is it possible to specify HTTP headers in the URL?
body: <p>I've got a (Spring) handler that I'd like users to be able to bookmark. As it's coded now, they get different formats (CSV, JSON) back based on the Accept header.</p>
  
  <p>Would there be any way for users to specify the URL so that they can say what header they want? Or am I going to have to give URL-level parameter for the different formats?</p>