gistfile1.clj

;Thought: Clojure destructing not supporting pattern matching means Compojure routes mix 
;         route matching and data extraction. Hence you validate within a route (since you want the extracted data).
;
;         Route matching should support matching on the properties of the extracted data.
;         A route is just a function and I want Erlang style guard statements.

;Now
(defroutes app
  (GET "/impression/:x" [x] (when (valid? x) {:body "Woo hoo" :status 200}))
  (ANY "*" {:status 404 :body "Not found"}))

;Seperate data validation pattern match 
(defroutes app
  (GET "/impression/:x" [x #(valid? %)] {:body "Woo hoo" :status 200}))
  (ANY "*" {:status 404 :body "Not found"}))

;Wrap outer route... Less pretty
(defroutes app
  (when (valid? (:x params) (GET "/impression/:x" [x] {:body "Woo hoo" :status 200})))
  (ANY "*" {:status 404 :body "Not found"}))