The following code can be used on your site to list all the attributes and values stored in the Request object. It's wrapped with a condition to only display when debug=true has been set in the URL as a parameter.
#if($request.getParameter("debug")) <h3>HTTP Request Attributes</h3> #set($reqAttrList = $request.getAttributeNames()) #foreach($reqAttr in $reqAttrList) <br/>Attr = $reqAttr Value = $request.getAttribute($reqAttr) #end #end