在Golang中从中间件发送回响应的最佳方法是什么

I have created middle-wares using Adapter pattern. One of my middle-ware is for authentication. So if the user is not authorized then I have to send back response to the user and the next middle-ware/s should not be called.

// Adapter type

type Adapter func(http.Handler) http.Handler

// Adapt func
func Adapt(h http.Handler, adapters ...Adapter) http.Handler {
    // Call all middleware
    for _, adapter := range adapters {
        h = adapter(h)
    }
    return h
}

// CheckAuth middleware
func CheckAuth() Adapter {
    return func(h http.Handler) http.Handler {
        return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
            // Get Authorization token from the header
            // Validate the token
            // if valid token then call h.ServeHTTP(w, r)
            // else send response 401 to the user,
            if(validUser){
                h.ServeHTTP(w, r)
            }else{
                fmt.Fprintf(w, "Unauthorized")
            }
            return h
        }
    }
}

http.Handle("/", Adapt(indexHandler, AddHeader(),
                                 CheckAuth(),
                                 CopyMgoSession(db),
                                 Notify(logger), 
                               )

h.ServeHTTP(w, r)forAdapt

let me know if there is any other way to handle such situation.