From 9cb0a2e43d9080f086304084d04c5d6aa7521933 Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Mon, 9 Oct 2023 12:10:34 +0300
Subject: [PATCH] Add default mime type if it's missing

---
 portal.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/portal.go b/portal.go
index cf1ad94..e513e81 100644
--- a/portal.go
+++ b/portal.go
@@ -3665,6 +3665,9 @@ func (portal *Portal) preprocessMatrixMedia(ctx context.Context, sender *User, r
 		}
 	}
 	mimeType := content.GetInfo().MimeType
+	if mimeType == "" {
+		content.Info.MimeType = "application/octet-stream"
+	}
 	var convertErr error
 	// Allowed mime types from https://developers.facebook.com/docs/whatsapp/on-premises/reference/media
 	switch {