Receives an HTTP request (a ring-map) and decides if it needs to forward the request to the real server or if it can do it by itself with the data it already has (cache).

forward-request.clj

(defn process-request
  "The heart of the Application Gateway. Checks if word is not _forbidden_ or
  _cached_ and if is not the case, it forwards the request to the orignal 
  server."
  [word]
  (debug "Received request for word" word)
  (cond
    (forbidden? word) (forbidden-response word)
    (cached? word) (cached-response word)
    :else (forward-request-and-cache! word (env :forward-port))))