sample.go

func main() {

        r := mux.NewRouter()
        r.HandleFunc("/foo", someHandler)

    var err error
        listener, err := net.Listen("unix", "/var/run/fcgi.sock")
        if err != nil {
                log.Fatal(err)
        }
        defer listener.Close()

        err = fcgi.Serve(listener, r)
 }