From 75f1c1939e82e10abd5302db888730ffbfc4ee98 Mon Sep 17 00:00:00 2001
From: Tasso Evangelista <tasso@tassoevan.me>
Date: Thu, 27 Dec 2018 17:03:58 -0200
Subject: [PATCH] Fallback content-type as application/octet-stream for
 uploaded files (#13033)

---
 packages/rocketchat-file-upload/server/config/GridFS.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/rocketchat-file-upload/server/config/GridFS.js b/packages/rocketchat-file-upload/server/config/GridFS.js
index 0a95bdc8c83..66ff1948414 100644
--- a/packages/rocketchat-file-upload/server/config/GridFS.js
+++ b/packages/rocketchat-file-upload/server/config/GridFS.js
@@ -158,7 +158,7 @@ new FileUploadClass({
 
 		res.setHeader('Content-Disposition', `attachment; filename*=UTF-8''${ encodeURIComponent(file.name) }`);
 		res.setHeader('Last-Modified', file.uploadedAt.toUTCString());
-		res.setHeader('Content-Type', file.type);
+		res.setHeader('Content-Type', file.type || 'application/octet-stream');
 		res.setHeader('Content-Length', file.size);
 
 		return readFromGridFS(file.store, file._id, file, req, res);