diff --git a/src/oss_util.rs b/src/oss_util.rs
index cdbbe09..07dc78d 100644
--- a/src/oss_util.rs
+++ b/src/oss_util.rs
@@ -101,3 +101,7 @@ fn get_current_secs() -> u64 {
     SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs()
 }
 
+// TODO read/write content from/to url
+
+// use sync meta.txt file ?
+// record valid files ...