From 5a29100ea7ec6a56052bc90ef95b8cc8483599b4 Mon Sep 17 00:00:00 2001
From: sawka <mike.sawka@gmail.com>
Date: Fri, 7 Jun 2024 10:37:48 -0700
Subject: [PATCH] fix weird http 501 error

---
 main.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/main.go b/main.go
index 3a3eb07ac..600dd558b 100644
--- a/main.go
+++ b/main.go
@@ -131,6 +131,10 @@ func serveWaveFile(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Length", fmt.Sprintf("%d", file.Size))
 	w.Header().Set("X-ZoneFileInfo", base64.StdEncoding.EncodeToString(jsonFileBArr))
 	w.Header().Set("Last-Modified", time.UnixMilli(file.ModTs).UTC().Format(http.TimeFormat))
+	if file.Size == 0 {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
 	for offset := file.DataStartIdx(); offset < file.Size; offset += filestore.DefaultPartDataSize {
 		_, data, err := filestore.WFS.ReadAt(r.Context(), zoneId, name, offset, filestore.DefaultPartDataSize)
 		if err != nil {