How to assign Middleware MUX only to one Handler only?

func (s * server) configurerouter () {
  S.Router.HandleFunc ("/ Signup", S.HandleSignUp ()). Methods ("Post")
  S.Router.Handlefunc ("/ Signin", S.HandleSignin ()). Methods ("Post")
  S.Router.HandleFunc ("/ profile / {ID: [0-9] +}", s .hylecreateprofile ()). Methods ("POST")
  S.ROUTER.USE (S.AuthenticateUser)
}

There is a picture of how to make authenticateUser called only with "/ profile / {ID: [0-9] +}" ?

Answer 1, Authority 100%

You need to create Subrouted from the main router. Handler and MidDleWareFunc

In your case, it turns out how

func (s * server) configurerouter () {
  S.Router.HandleFunc ("/ Signup", S.HandleSignUp ()). Methods ("Post")
  S.Router.Handlefunc ("/ Signin", S.HandleSignin ()). Methods ("Post")
  Subrouter: = s.router.handlefunc ("/ profile / {ID: [0-9] +}", s.handlecreateprofile ()). subroute ()
  Subrouter.use (S.AuthenticateUser)
  subrouter.methods ("POST")
}

Test example

FUNC MAIN () {
  Router: = Mux.Newrouter ()
  Router.HandleFunc ("/ Signup", Func (http.ResponseWriter, * http.request) {
    PrintLN ("Signup")
  }). Methods ("POST")
  Router.HandleFunc ("/ Signin", Func (http.ResponseWriter, * http.request) {
    PrintLN ("Signin")
  }). Methods ("POST")
  Subrouter: = Router.HandleFunc ("/ Profile", Func (W http.ResponseWriter, R * http.request) {
    PrintLN ("42")
  }). Subrouter ()
  subrouter.use (Func (H Http.Handler) http.Handler {
    Return http.HandlerFunc (Func (W http.ResponseWriter, R * http.request) {
      w.Write ([] BYTE ("Custom Message"))
    })
  })
  subrouter.methods ("POST")
  SRV: = & amp; http.server {
    Handler: Router,
    ADDR: "127.0.0.1:8000",
    WritetimeOut: 15 * Time.second,
    ReadTimeout: 15 * Time.second,
  }
  log.fatal (srv.listenandServe ())
}