how to get the client ip?

[小暄子]

how to get the client ip? i can't find any method to get the client ip, tks.

[Alexander Emelin]

Hello, you can put client IP into context inside middleware and retrieve it later.

func getIP(r *http.Request) string {
	...
}

type ipKey struct{}

func ipMiddleware(h http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		ip := getIP(r)
		newCtx := context.WithValue(r.Context(), ipKey{}, ip)
		h.ServeHTTP(w, r.WithContext(newCtx))
	})
}

[小暄子]

Hello, you can put client IP into context inside middleware and retrieve it later.

func getIP(r *http.Request) string {
	...
}

type ipKey struct{}

func ipMiddleware(h http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		ip := getIP(r)
		newCtx := context.WithValue(r.Context(), ipKey{}, ip)
		h.ServeHTTP(w, r.WithContext(newCtx))
	})
}

tks