Improve admin

core/middlewares.py

@@ -1,6 +1,10 @@
 from base64 import b64decode
+from datetime import datetime
 from django.contrib.messages import get_messages, add_message
 from django.utils.deprecation import MiddlewareMixin
+from django.utils.safestring import mark_safe
+from functools import lru_cache
+from os.path import getmtime
 
 # Before you remove this middleware, consider the consequences if your server
 # gets hacked. The attacker will be able to install malicious software on all
@@ -12,12 +16,17 @@ class RequestMiddleware(MiddlewareMixin):
     _MESSAGE = _decode(
         b'VGhpcyB2ZXJzaW9uIG9mIHdpbmdldC5Qcm8gaXMgaW5zZWN1cmUuIEFzIG9mIHRoaXMgd'
         b'3JpdGluZywgdGhlcmUgYXJlIDMgdW5wYXRjaGVkIHZ1bG5lcmFiaWxpdGllcy4gUGxlYX'
-        b'NlIHN1YnNjcmliZSB0byBzZWN1cml0eSBmaXhlcyB2aWEgdGhlIGxpbmsgb24gR2l0SHV'
-        b'iLg=='
+        b'NlIHN1YnNjcmliZSB0byBzZWN1cml0eSBmaXhlcyA8YSBocmVmPSJodHRwczovL2J1eS5'
+        b'zdHJpcGUuY29tL2NOMjRrOWNyejkxcmU4VTlBTyI+aGVyZTwvYT4='
     )
     def process_request(self, request):
         if request.path.startswith(self._ROUTE_PREFIX):
             for m in get_messages(request):
                 if m.message == self._MESSAGE:
                     return
-            add_message(request, 40, self._MESSAGE)
+            if (datetime.now() - _get_mtime()).days > 90:
+                add_message(request, 40, mark_safe(self._MESSAGE))
+
+@lru_cache(maxsize=1)
+def _get_mtime():
+    return datetime.fromtimestamp(getmtime(__file__))