"Generate URL, Degenerate URL"
A bi-directional routing and URL generation library, where routes are configured as simple Clojure data structures.
Routes are defined as a data structure that is used at runtime to route requests and construct URLs. As the routes are just a data structure they can be easily inspected by other functions to produce related data, e.g. navigation, breadcrumbs.
(require '[gudu.core :as gd]
'[gudu.segment :as gds]
'[gudu.middleware :as gdm])
(def my-routes
{:home gds/root
:blog ["blog" {:latest gds/root
:post [gds/string]}]})
;; URL Generation
(def gu (gd/gu my-routes))
(gu :home) ;; => "/"
(gu :blog) ;; => "/blog"
(gu :blog :post "great-post") ;; => "/blog/great-post"
;; URL Degeneration
(def du (gd/du my-routes))
(du "/") ;; => [:home]
(du "/blog") ;; => [:blog :latest]
(du "/blog/another-post") ;; => [:blog :post "another-post"]
;; du is normally accessed indirectly via the gudu ring middleware
(defn get-handler [route]
;; ... return handler function based on route ...
(case (first route)
:home (fn [req] {:handler :home :uri (:uri req) :route route})
:blog (fn [req] {:handler :blog :uri (:uri req) :route route})))
(def app
(-> (gdm/router get-handler (fn [_req] {:handler :404}))
(gdm/wrap-route my-routes)))
(app {:uri "/"}) ;; {:handler :home, :uri "/", :route [:home]}
(app {:uri "/blog"}) ;; {:handler :blog, :uri "/blog", :route [:blog :latest]}
(app {:uri "/blog/3"}) ;; {:handler :blog, :uri "/blog/post-3", :route [:blog :post "3"]}
(app {:uri "/404"}) ;; {:handler :404}See the gudu-examples project, in particular take a look at blog.clj.
Copyright © 2013 Matt Lee
Distributed under the Eclipse Public License, the same as Clojure.