Express Integration

I hacked Macchiato to work with the Express web framework, combining the two on the same server. It facilitates Express-based servers to be gradually converted to use Macchiato. And existing Express integrations such as Sente can immediately be used with Macchiato. This is the essential code:

(defn bidi-router [routes]                                                                                    
  (fn [req res]                                                                                                                  
    (if-let [route (some->> req :uri (bidi.bidi/match-route routes) :handler)]                                                   
      (route req res))))
                                                                                                                                 
(defn macchiato [http-router & [opts]]                                                                                           
  (let [route (macchiato.http/handler http-router opts)]                                                                         
    (fn [req res next]                                                                                                           
      (if-not (route req res)                                                                                                    
        (next)))))

Macchiato bidi routes can then be used with Express:

(doto (@express) 
    (.use "/" (macchiato (bidi-router routes))))

Perhaps it could be an optional module? I'd be glad to turn it into a PR.

Start by reviewing the provided bidi-router and macchiato functions, then locate the repository's Node.js HTTP integration entry point. Done means Express can mount Macchiato routes and existing Express integrations can be used through the proposed optional module.