Accessing Compojure query string

Question

I'm trying to pull a value out of the url query string however I can return what I believe is a map, however when i use the below code, it doesn't process it as expected. Can anyone advise how I access specific values in the returned querystring datastructure?

http://localhost:8080/remservice?foo=bar

(defroutes my-routes
  (GET "/" [] (layout (home-view)))
  (GET "/remservice*" {params :query-params} (str (:parameter params))))