auth0 jwt go middleware example

auth0.go

func getUserFromRequest(r *http.Request) *model.User {
	//Authorization: bearer {token}
	//auth0 user is in user

	jwtContext := context.Get(r, "user")
	auth0Id := ((jwtContext.(*jwt.Token)).Claims).(jwt.MapClaims)["sub"]	
	user := model.GetUserFromAuthId(auth0Id.(string))
	return user
}


func UserAuthorizationMiddleware(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc){
	user := getUserFromRequest(r)
	context.Set(r, "User", user)
	next(rw, r)
}

///
func main() {
	r := mux.NewRouter()
	
	jwtMiddleware := jwtmiddleware.New(jwtmiddleware.Options{
		ValidationKeyGetter: func(token *jwt.Token) (interface{}, error) {
			secret := []byte(os.Getenv("AUTH0_CLIENT_SECRET"))

			if len(secret) == 0 {
				log.Fatal("AUTH0_CLIENT_SECRET is not set")
			}

			return secret, nil
		},
		SigningMethod: jwt.SigningMethodHS256,
		
	})
	
	r.Handle("/user", negroni.New(
		negroni.HandlerFunc(jwtMiddleware.HandlerWithNext),
		negroni.HandlerFunc(UserAuthorizationMiddleware),
		negroni.HandlerFunc(GetUserHandler),
	))
}