ЯсноПонятно24

package main

import ( "encoding/base64" "net/http" )

func main() { http.HandleFunc("/answer/", Authorization(func(w http.ResponseWriter, r *http.Request) { w.Write([]byte("The answer is 42")) }))

http.ListenAndServe(":8080", nil)

}

func Authorization(next http.HandlerFunc) http.HandlerFunc { return func(w http.ResponseWriter, r *http.Request) { authHeader := r.Header.Get("Authorization") if authHeader == "" { w.WriteHeader(http.StatusUnauthorized) w.Write([]byte("Unauthorized")) return }

	decoded, err := base64.StdEncoding.DecodeString(authHeader[len("Basic "):])
	if err != nil {
		w.WriteHeader(http.StatusUnauthorized)
		w.Write([]byte("Unauthorized"))
		return
	}

	creds := string(decoded)
	if creds != "userid:password" {
		w.WriteHeader(http.StatusUnauthorized)
		w.Write([]byte("Unauthorized"))
		return
	}

	next(w, r)
}

}