jwt_token.go

package middleware

func (*JWTToken) ServeHTTP(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
    tmp := mux.Vars(r)
    // tmp is nil
  
    // Do stuff
  
    next(w, r)
}

main.go

func main() {
  mainRoutes := mux.NewRouter().StrictSlash(true)
  mainRoutes.HandleFunc("/info", handler.Info).Methods("GET")

  authRoutes := mux.NewRouter().StrictSlash(true)
  authRoutes.HandleFunc("/user/{addr:[A-Za-z0-9]{64}}", handler.RetrieveUser).Methods("GET")

  publicRouter := negroni.New()
  publicRouter.Use(&middleware.Tracer{})
  publicRouter.Use(&middleware.Logger{})
  publicRouter.UseHandler(mainRoutes)

  authRouter := negroni.New()
  authRouter.Use(&middleware.Tracer{})
  authRouter.Use(&middleware.Logger{})
  authRouter.Use(&middleware.JWTToken{})  // Add auth
  authRouter.UseHandler(authRoutes)

  mainRouter := negroni.New()
  mainRouter.UseHandler(authRouter)
  mainRouter.UseHandler(publicRouter)

  err := http.ListenAndServeTLS(host, cert, key, mainRouter)
}