From 2a6db0fd436a62afdadbb03d55e8acd51d67791a Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 11 Feb 2020 09:45:02 -0800
Subject: [PATCH] volume: return 204 for unchanged file uploads

fix https://github.com/chrislusf/seaweedfs/issues/1196
---
 weed/server/volume_server_handlers_write.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/weed/server/volume_server_handlers_write.go b/weed/server/volume_server_handlers_write.go
index cd35255e5..ac8fa4f42 100644
--- a/weed/server/volume_server_handlers_write.go
+++ b/weed/server/volume_server_handlers_write.go
@@ -52,9 +52,10 @@ func (vs *VolumeServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 	ret := operation.UploadResult{}
 	_, isUnchanged, writeError := topology.ReplicatedWrite(vs.GetMaster(), vs.store, volumeId, needle, r)
 
-	// http 304 status code does not allow body
+	// http 204 status code does not allow body
 	if writeError == nil && isUnchanged {
-		w.WriteHeader(http.StatusNotModified)
+		setEtag(w, needle.Etag())
+		w.WriteHeader(http.StatusNoContent)
 		return
 	}