From 977b30e992108e480c883cdd461bf0c8f6598f25 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@uber.com>
Date: Wed, 20 Mar 2019 10:13:51 -0700
Subject: [PATCH] weed filer: http HEAD response header add ETag

fix https://github.com/chrislusf/seaweedfs/issues/892
---
 weed/server/filer_server_handlers_read.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index 4d1f41fd4..89d47b0b8 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -52,6 +52,7 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 	if r.Method == "HEAD" {
 		w.Header().Set("Content-Length", strconv.FormatInt(int64(filer2.TotalSize(entry.Chunks)), 10))
 		w.Header().Set("Last-Modified", entry.Attr.Mtime.Format(http.TimeFormat))
+		setEtag(w, filer2.ETag(entry.Chunks))
 		return
 	}