Dr. Evil is a "web debugger". You add Dr. Evil at a secret path in your web application and you get a Clojure REPL on your running web application.
As the name implies, it's probably a bad idea to use it in production - it's a huge security risk - there is no sandboxing whatsoever.
Add Dr. Evil to your project.clj:
Include the EVIL macro inside your defroutes, for example:
(defroutes app (GET "/"  "Nothing here! (try /evil)") (EVIL "/evil") (route/not-found "Dude! I can't find it."))
Then run your web server, access your "secret" path and start debugging.
Copyright (C) 2010 Miki Tebeka <firstname.lastname@example.org>
Distributed under the Eclipse Public License, the same as Clojure.