diff --git a/proxyserver/main.go b/proxyserver/main.go
index 91ffa076..1b0b9f9c 100644
--- a/proxyserver/main.go
+++ b/proxyserver/main.go
@@ -209,22 +209,22 @@ func NewBackend(mux *http.ServeMux, httpAddress string, muxPaths ...string) *Bac
 			target := url.URL{Scheme: "ws", Host: strings.Split(backend.HttpAddress, "//")[1], Path: r.URL.Path}
 
 			var transfer = func(src, dest *websocket.Conn) {
+				defer src.Close()
+				defer dest.Close()
+				// TODO: 可以做错误处理
 				for {
 					mType, msg, err := src.ReadMessage()
 					if err != nil {
 						log.Println(err)
-						break
+						return
 					}
 
 					err = dest.WriteMessage(mType, msg)
 					if err != nil {
 						log.Println(err)
-						break
+						return
 					}
 				}
-
-				src.Close()
-				dest.Close()
 			}
 
 			header := r.Header.Clone()