Sensible compojure/ring defaults for an API

compojure.clj

(ns my-api.handler
  (:require [compojure.core :refer :all]
            [ring.util.response :refer [response status content-type]]
            [ring.middleware.params :refer [wrap-params]]
            [ring.middleware.keyword-params :refer [wrap-keyword-params]]
            [ring.middleware.json :refer [wrap-json-response wrap-json-body]]))

(defroutes app-routes
  (context "/v1" []
    (GET "/" req
      (response {:hello ["world" "universe"]})))
  (ANY "*" req
    (-> (response {:error "Not found."
                   :status 404})
        (status 404))))

(def app
  (-> app-routes
      ;; make entries in :params keywords
      wrap-keyword-params
      ;; parse the query string and put the results into :params on
      ;; request
      wrap-params
      ;; parses the body and converts it to a clojure structure
      ;; in :body on request
      (wrap-json-body {:keywords? true :bigdecimals? true})
      ;; sets the content-type header to json and will convert the
      ;; response itself to json
      wrap-json-response))