将在所有其他处理程序之前运行的中间件

Question

I have this in main:

    router := mux.NewRouter()

    router.PathPrefix("/").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        glog.Info("before")
    })

    router.HandleFunc("/people", person.GetMany).Methods("GET")
    router.HandleFunc("/people/{id}", person.GetOne).Methods("GET")
    router.HandleFunc("/people/{id}", person.Create).Methods("POST")
    router.HandleFunc("/people/{id}", person.Delete).Methods("DELETE")

this mean that nothing got hit except the first middleware handler, so I tried creating a new router to handle the logging:

    mux.NewRouter().PathPrefix("/").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        glog.Info("before")
    })

but this new router doesn't get hit AND none of my other routes get hit. What should I be doing instead?

Answer 1

Middleware is registered by calling Router.Use

Sample code is here

Your code should be:

router.Use(func(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        glog.Info("before")
        next.ServeHTTP(w, r)
    })
})