Getting Clojure

In the Wild

You can find a great example of clojure.spec in action in the ring-spec,^[27] which contains specs for the Ring web application library. For example, as we saw back in Chapter 6, ​Functional Things​, a key part of a Ring application is dealing with requests, which arrive at the application in the form of maps. But what, exactly, do those request maps contain?

I’m glad you asked:

(s/def :ring/request
  (s/keys :req-un [:ring.request/server-port
                   :ring.request/server-name
                   :ring.request/remote-addr
                   :ring.request/uri
                   :ring.request/scheme
                   :ring.request/protocol
                   :ring.request/headers
                   :ring.request/request-method]
          :opt-un [:ring.request/query-string
                   :ring.request/body]))

Looks like we have a map with entries for port, a ...