Lithium/auth/authorization.go

package auth

import "net/http"

type AuthenticationMiddleware struct {
	Secret string
}

func (middleware AuthenticationMiddleware) Middleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		authToken := r.Header.Get("Authorization")

		if authToken == "" || authToken != middleware.Secret {
			http.Error(w, "Forbidden", http.StatusForbidden)
		} else {
			next.ServeHTTP(w, r)
		}
	})
}