Clout

Clout is a library for matching HTTP routes in Clojure. It uses the same routing syntax as used by popular Ruby web frameworks like Ruby on Rails and Sinatra.

Here is an example of use:

user=> (use 'clout)
nil
user=> (route-matches "/article/:title" "/article/clojure")
{:title "clojure"}
user=> (route-matches "/public/*" "/public/style/screen.css")
{:* "style/screen.css"}

Clout supports both keywords and wildcards. Keywords (like ":title") will match any character but the following: / . , ; ?. Wildcards will match anything.

If a route does not match, nil is returned:

user=> (route-matches "/products" "/articles")
nil

For additional performance you can choose to pre-compile routes:

user=> (def user-route (route-compile "/user/:id"))
#'user/user-route
user=> (route-matches user-route "/user/10")
{:user "10"}

When compiling a route, you can specify a map of regular expressions to use for different keywords. This allows more specific routing:

user=> (def user-route (route-compile "/user/:id" {:id #"\d+"}))
#'user/user-route
user=> (route-matches user-route "/user/10")
{:user "10"}
user=> (route-matches user-route "/user/jsmith")
nil