flush config to disk every http

src/device/input/parse/v01/server.go

@@ -40,6 +40,7 @@ func (v01 *V01) _listen() {
 				defer mutex.Unlock()
 			}
 			v01.ServeHTTP(w, r)
+			v01.stashConfig() // TODO
 		}),
 	}
 	go func() {
@@ -113,11 +114,20 @@ func (v01 *V01) servePatchConfig(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	v01.cfg = v01.cfg.WithPatch(v)
+	if err := v01.stashConfig(); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func (v01 *V01) stashConfig() error {
 	if b, err := yaml.Marshal(v01.cfg); err == nil && FlagParseV01Config != "" {
 		if err := os.WriteFile(FlagParseV01Config, b, os.ModePerm); err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return err
 		}
+	} else if err != nil {
+		return err
 	}
+	return nil
 }
 
 func (v01 *V01) serveGlobalQueries(r *http.Request) {
@@ -167,6 +177,7 @@ func (v01 *V01) serveGM(w http.ResponseWriter, r *http.Request) {
 		}
 	default:
 		http.NotFound(w, r)
+		return
 	}
 }