code: func (m *Macaron) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
  	if m.hasURLPrefix {
  		req.URL.Path = strings.TrimPrefix(req.URL.Path, m.urlPrefix)
  	}
  	for _, h := range m.befores {
  		if h(rw, req) {
  			return
  		}
  	}
  	m.Router.ServeHTTP(rw, req)
  }
docs: // ServeHTTP is the HTTP Entry point for a Macaron instance.
  // Useful if you want to control your own HTTP server.
  // Be aware that none of middleware will run without registering any router.