add get_ip_addr util function for servers behind proxies

core/utils.py

@@ -1,5 +1,6 @@
 from typing import Dict, Any
 from types import ModuleType
+from twisted.web.http import Request
 import logging
 import importlib
 from os import walk
@@ -21,3 +22,7 @@ class Utils:
                         logging.getLogger("core").error(f"get_all_titles: {dir} - {e}")
                         raise
             return ret
+    
+    @classmethod
+    def get_ip_addr(cls, req: Request) -> str:
+        return req.getAllHeaders()[b"x-forwarded-for"].decode() if b"x-forwarded-for" in req.getAllHeaders() else req.getClientAddress().host