fix svg display error

Author: jiangnianshun

django-mdict.conf

@@ -1,18 +1,18 @@
 <IfModule expires_module>
 #设置浏览器端缓存
 ExpiresActive on
-#缓存时长7200000/3600/24=83天
-ExpiresByType text/css A7200000
-ExpiresByType application/x-javascript A7200000
-ExpiresByType application/javascript A7200000
-ExpiresByType text/plain A7200000
-#ExpiresByType text/html A7200000
-ExpiresByType image/jpeg A7200000
-ExpiresByType image/gif A7200000
-ExpiresByType image/png A7200000
-ExpiresByType image/x-icon A7200000
-ExpiresByType font/ttf A7200000
-ExpiresByType font/woff A7200000
+#缓存时长604800/3600/24=7天
+ExpiresByType text/css A604800
+ExpiresByType application/x-javascript A604800
+ExpiresByType application/javascript A604800
+ExpiresByType text/plain A604800
+ExpiresByType image/jpeg A604800
+ExpiresByType image/gif A604800
+ExpiresByType image/png A604800
+ExpiresByType image/x-icon A604800
+ExpiresByType font/ttf A2592000
+ExpiresByType font/woff A2592000
+ExpiresByType font/woff2 A2592000
 </IfModule>
 WSGIApplicationGroup %{GLOBAL}
 WSGIPassAuthorization On

mdict/mdict_utils/search_object.py

@@ -260,7 +260,9 @@ def search_mdd(self):
 
         if mime_type.startswith('image/'):
             # 判断图片真实类型
-            mime_type = 'image/' + imghdr.what(None, res_content)
+            img_type = imghdr.what(None, res_content)
+            if img_type is not None:
+                mime_type = 'image/' + img_type
 
         if mime_type == 'image/tiff':
             im = Image.open(BytesIO(res_content))