set filename in Content-Disposition header

weed/server/filer_server_handlers_read.go

@@ -101,14 +101,14 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 	}
 	setEtag(w, etag)
 
+	filename := entry.Name()
+	adjustHeaders(w, r, filename)
+
 	if r.Method == "HEAD" {
 		w.Header().Set("Content-Length", strconv.FormatInt(int64(filer2.TotalSize(entry.Chunks)), 10))
 		return
 	}
 
-	filename := entry.Name()
-	adjustHeadersAfterHEAD(w, r, filename)
-
 	totalSize := int64(filer2.TotalSize(entry.Chunks))
 
 	if rangeReq := r.Header.Get("Range"); rangeReq == "" {