Added domain image for linux.org.ru, added ability to make images for third-level domains when it is an org.ru, com.ua, co.uk etc domain

boards/models/attachment/viewers.py

@@ -5,8 +5,8 b' from django.contrib.staticfiles.template'
 from django.core.files.images import get_image_dimensions
 from django.template.defaultfilters import filesizeformat
 
+from boards.utils import get_domain
 
-REGEX_DOMAIN = re.compile(r'(\w+\.)*(\w+\.\w+)')
 
 FILE_STUB_IMAGE = 'images/file.png'
 FILE_STUB_URL = 'url'
@@ -172,7 +172,7 b' class UrlViewer(AbstractViewer):'
     def get_format_view(self):
         protocol = self.url.split('://')[0]
         full_domain = self.url.split('/')[2]
-        domain = REGEX_DOMAIN.search(full_domain).group(2)
+        domain = get_domain(full_domain)
 
         if protocol in URL_PROTOCOLS:
             url_image_name = URL_PROTOCOLS.get(protocol)

boards/utils.py

@@ -32,6 +32,10 b" ANON_IP = '127.0.0.1'"
 
 FILE_EXTENSION_DELIMITER = '.'
 
+KNOWN_DOMAINS = (
+        'org.ru',
+)
+
 
 def is_anonymous_mode():
     return get_bool(SETTING_MESSAGES, SETTING_ANON_MODE)
@@ -143,3 +147,24 b' def get_file_mimetype(file) -> str:'
     elif type(file_type) == bytes:
         file_type = file_type.decode()
     return file_type
+
+
+def get_domain(url: str) -> str:
+    """
+    Gets domain from an URL with random number of domain levels.
+    """
+    levels = url.split('.')
+    top = levels[-1]
+    second = levels[-2]
+
+    has_third_level = len(levels) > 2
+    if has_third_level:
+        third = levels[-3]
+
+    if has_third_level and ('{}.{}'.format(second, top) in KNOWN_DOMAINS):
+        result = '{}.{}.{}'.format(third, second, top)
+    else:
+        result = '{}.{}'.format(second, top)
+
+    return result
+