improvements

filemanager.go

@@ -73,6 +73,12 @@ func (f FileManager) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, err
 				}
 
 				return fi.ServeAsHTML(w, r, c)
+			case http.MethodPut:
+				if fi.IsDir {
+					return http.StatusNotAcceptable, nil
+				}
+				// Update a file
+				return fi.Update(w, r, c)
 			case http.MethodPost:
 				// Upload a new file
 				if r.Header.Get("Upload") == "true" {