From 07f49d034cef5f77e5d03d15f472e3b0c2bf8417 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Mon, 1 Dec 2025 17:19:04 -0800
Subject: [PATCH] Add warning log when multiple checksum headers found in
 trailer

- Log a warning when multiple valid checksum headers appear in trailers
- Uses last checksum header as suggested by CodeRabbit reviewer
- Improves debugging for edge cases with multiple checksum algorithms
---
 weed/s3api/chunked_reader_v4.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/weed/s3api/chunked_reader_v4.go b/weed/s3api/chunked_reader_v4.go
index 52d7007aa..364bd57f7 100644
--- a/weed/s3api/chunked_reader_v4.go
+++ b/weed/s3api/chunked_reader_v4.go
@@ -530,6 +530,9 @@ func parseChunkChecksum(b *bufio.Reader) (ChecksumAlgorithm, []byte, error) {
 			key := string(parts[0])
 			value := trimTrailingWhitespace(parts[1])
 			if alg, err := extractChecksumAlgorithm(key); err == nil {
+				if checksumAlgorithm != ChecksumAlgorithmNone {
+					glog.V(3).Infof("multiple checksum headers found in trailer, using last: %s", key)
+				}
 				checksumAlgorithm = alg
 				checksum = value
 			}