diff --git a/chfs-ng/internal/api/server.go b/chfs-ng/internal/api/server.go
index 649bacb..5d58f6a 100644
--- a/chfs-ng/internal/api/server.go
+++ b/chfs-ng/internal/api/server.go
@@ -85,6 +85,26 @@ func account(r *http.Request, s *Server) *auth.Account {
 	return s.Auth.Guest
 }
 
+func (s *Server) logOp(r *http.Request, action string) {
+	if s.Log == nil {
+		return
+	}
+	a := account(r, s)
+	user := ""
+	if a != nil {
+		user = a.Username
+	}
+	_ = s.Log.Write(clientIPString(r), user, action)
+}
+
+func clientIPString(r *http.Request) string {
+	ip := clientIP(r)
+	if ip == nil {
+		return "-"
+	}
+	return ip.String()
+}
+
 func writeJSON(w http.ResponseWriter, v any) {
 	w.Header().Set("Content-Type", "application/json; charset=utf-8")
 	json.NewEncoder(w).Encode(v)