It has stuff like this, which I remember from my clojure implementation of srv.arc. (do (prn header*) (awhen (max-age* op) (prn "Cache-Control: max

It has stuff like this, which I remember from my clojure implementation of srv.arc. (do (prn header*) (awhen (max-age* op) (prn "Cache-Control: max-age=" it)) (f str req))))