[GitHub] [arrow-rs] tustvold commented on a diff in pull request #4834: fix: object store http header last modified

["tustvold (via GitHub)" <gi...@apache.org>]

tustvold commented on code in PR #4834:
URL: https://github.com/apache/arrow-rs/pull/4834#discussion_r1329292578


##########
object_store/src/client/header.rs:
##########
@@ -53,19 +53,22 @@ pub enum Error {
 
 /// Extracts [`ObjectMeta`] from the provided [`HeaderMap`]
 pub fn header_meta(location: &Path, headers: &HeaderMap) -> Result<ObjectMeta, Error> {
-    let last_modified = headers
-        .get(LAST_MODIFIED)
-        .context(MissingLastModifiedSnafu)?;
+    let last_modified = headers.get(LAST_MODIFIED);
+    let last_modified = match last_modified {
+        Some(last_modified) => {
+            let last_modified = last_modified.to_str().context(BadHeaderSnafu)?;
+            DateTime::parse_from_rfc2822(last_modified)
+                .context(InvalidLastModifiedSnafu { last_modified })?
+                .with_timezone(&Utc)
+        }
+        // If the last modified header is missing, assume the object was created at the epoch
+        None => chrono::Utc.timestamp_nanos(0),

Review Comment:
   IIRC this method is deprecated and you will need to use timestamp_nanos_opt



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