all(minor): replace django-ipware with custom implementation

passbook/lib/utils/http.py

@@ -0,0 +1,24 @@
+"""http helpers"""
+from typing import Any, Dict, Optional
+
+from django.http import HttpRequest
+
+
+def _get_client_ip_from_meta(meta: Dict[str, Any]) -> Optional[str]:
+    """Attempt to get the client's IP by checking common HTTP Headers.
+    Returns none if no IP Could be found"""
+    headers = (
+        'HTTP_X_FORWARDED_FOR',
+        'HTTP_X_REAL_IP',
+        'REMOTE_ADDR',
+    )
+    for _header in headers:
+        if _header in meta:
+            return meta.get(_header)
+    return None
+
+
+def get_client_ip(request: HttpRequest) -> Optional[str]:
+    """Attempt to get the client's IP by checking common HTTP Headers.
+    Returns none if no IP Could be found"""
+    return _get_client_ip_from_meta(request.META)