From 8d236746edc38513cafd344cc58f2127b1f99ce1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philipp=20H=C3=B6rist?= <philipp@hoerist.com>
Date: Wed, 21 Mar 2018 22:09:36 +0100
Subject: [PATCH] [preview] Fix error when no Content-Type is set

---
 url_image_preview/url_image_preview.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/url_image_preview/url_image_preview.py b/url_image_preview/url_image_preview.py
index 120b9a1..afe27c4 100644
--- a/url_image_preview/url_image_preview.py
+++ b/url_image_preview/url_image_preview.py
@@ -476,7 +476,7 @@ class Base(object):
                          key, iv, encrypted):
         file_mime, file_size = tuple_arg
         # Check if mime type is acceptable
-        if file_mime == '' and file_size == 0:
+        if (file_mime == '' and file_size == 0) or file_mime is None:
             log.info("Failed to load HEAD Request for URL: '%s'"
                      "(see debug log for more info)", url)
             # URL is already displayed