1 files changed, 4 insertions, 1 deletions
diff --git a/kittybox-rs/src/media/storage/mod.rs b/kittybox-rs/src/media/storage/mod.rs
index b34da88..4ef7c7a 100644
--- a/kittybox-rs/src/media/storage/mod.rs
+++ b/kittybox-rs/src/media/storage/mod.rs
@@ -17,6 +17,8 @@ pub struct Metadata {
     pub filename: Option<String>,
     /// The recorded length of the file.
     pub length: Option<NonZeroUsize>,
+    /// The e-tag of a file. Note: it must be a strong e-tag, for example, a hash.
+    pub etag: Option<String>,
 }
 impl From<&Field<'_>> for Metadata {
     fn from(field: &Field<'_>) -> Self {
@@ -25,7 +27,8 @@ impl From<&Field<'_>> for Metadata {
                 .map(|i| i.to_owned()),
             filename: field.file_name()
                 .map(|i| i.to_owned()),
-            length: None
+            length: None,
+            etag: None,
         }
     }
 }