From d1a89b0faa3d069d777c687e3b05f957ce1ddc6a Mon Sep 17 00:00:00 2001
From: roman <roman.sertsov@postindustria.com>
Date: Tue, 30 Apr 2024 12:18:54 +0300
Subject: [PATCH] If-Modified-Since header formatted toUTCString

---
 fiftyone.pipeline.engines/dataFileUpdateService.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fiftyone.pipeline.engines/dataFileUpdateService.js b/fiftyone.pipeline.engines/dataFileUpdateService.js
index ed35565..78c1552 100644
--- a/fiftyone.pipeline.engines/dataFileUpdateService.js
+++ b/fiftyone.pipeline.engines/dataFileUpdateService.js
@@ -89,7 +89,7 @@ class DataFileUpdateService {
     if (dataFile.verifyIfModifiedSince) {
       try {
         requestOptions.headers = {
-          'If-Modified-Since': dataFile.getDatePublished()
+          'If-Modified-Since': dataFile.getDatePublished().toUTCString()
         };
       } catch (e) {