package handler import ( "encoding/json" "net/http" ) func writeJSON(w http.ResponseWriter, status int, v any) { w.Header().Set("Content-Type", "application/json") w.WriteHeader(status) _ = json.NewEncoder(w).Encode(v) } // writeError selalu mengirim error sebagai JSON (Content-Type: application/json). func writeError(w http.ResponseWriter, status int, msg string) { writeJSON(w, status, map[string]string{"error": msg}) }