Disable caching and sniffing via HTTP headers

disablecaching.go

func DisableCachingAndSniffing(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate;")
		w.Header().Set("pragma", "no-cache")
		w.Header().Set("X-Content-Type-Options", "nosniff")
		next.ServeHTTP(w, r)
	})
}