Load images with image/jpg mimetype

boards/forms.py

@@ -15,9 +15,12 b' from boards.models import Tag, Post'
 from neboard import settings
 import boards.settings as board_settings
 
+HEADER_CONTENT_LENGTH = 'content-length'
+HEADER_CONTENT_TYPE = 'content-type'
 
 CONTENT_TYPE_IMAGE = (
     'image/jpeg',
+    'image/jpg',
     'image/png',
     'image/gif',
     'image/bmp',
@@ -298,9 +301,9 b' class PostForm(NeboardForm):'
         try:
             # Verify content headers
             response_head = requests.head(url, verify=False)
-            content_type = response_head.headers['content-type'].split(';')[0]
+            content_type = response_head.headers[HEADER_CONTENT_TYPE].split(';')[0]
             if content_type in CONTENT_TYPE_IMAGE:
-                length_header = response_head.headers.get('content-length')
+                length_header = response_head.headers.get(HEADER_CONTENT_LENGTH)
                 if length_header:
                     length = int(length_header)
                     self.validate_image_size(length)