From 43685788ab83d9aba7c69f27939b32a4e68ae58e Mon Sep 17 00:00:00 2001
From: Mahmood Ali <mahmood@circleci.com>
Date: Thu, 28 Jan 2016 22:57:23 -0500
Subject: [PATCH] Don't set empty ETag values

Currently, metadata.Md5 value isn't populated, yet the ETag is set to
`""`, causing AWS Java SDK to fail integrity checks with GetObject
api calls.
---
 api-headers.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/api-headers.go b/api-headers.go
index 032158063..f1181512e 100644
--- a/api-headers.go
+++ b/api-headers.go
@@ -79,7 +79,9 @@ func setObjectHeaders(w http.ResponseWriter, metadata fs.ObjectMetadata, content
 	lastModified := metadata.Created.Format(http.TimeFormat)
 	// object related headers
 	w.Header().Set("Content-Type", "application/octet-stream")
-	w.Header().Set("ETag", "\""+metadata.Md5+"\"")
+	if metadata.Md5 != "" {
+		w.Header().Set("ETag", "\""+metadata.Md5+"\"")
+	}
 	w.Header().Set("Last-Modified", lastModified)
 
 	// set content range