fix path error at http

vtqe/tools/http.go

@@ -169,7 +169,7 @@ func ReadFolder(w http.ResponseWriter, r *http.Request, fullpath string, isroot
 	}
 	w.Write([]byte("<hr /><pre>\n"))
 	if !isroot {
-		w.Write([]byte(fmt.Sprintf("<p><a href='%s'>%s</a>  %s</p>\n", "..", "..", "上层文件夹")))
+		w.Write([]byte(fmt.Sprintf("<p><a href='%s'>%s</a>  %s</p>\n", r.URL.Path+"/..", "..", "上层文件夹")))
 	}
 	if r.URL.Path == "/" {
 		r.URL.Path = ""