fix latin-1 errors

app/api.py

@@ -3,10 +3,13 @@ from fastapi.security import HTTPBasic, HTTPBasicCredentials
 from .deps import get_geo
 from .config import settings
 from .geo import reload_provider
+from urllib.parse import quote
 import secrets
 import ipaddress
 import re
 import json
+import unicodedata
+
 
 router = APIRouter()
 security = HTTPBasic()
@@ -37,6 +40,14 @@ def _check_admin(creds: HTTPBasicCredentials):
     return True
 
 
+def _safe_hdr(v: str) -> str:
+    try:
+        v.encode("latin-1")
+        return v
+    except UnicodeEncodeError:
+        return unicodedata.normalize("NFKD", v).encode("ascii", "ignore").decode("ascii") or "?"
+
+
 def _normalize_ip_str(ip_raw: str) -> str | None:
     """Usuń port, whitespace i ewentualne cudzysłowy"""
     if not ip_raw:
@@ -82,13 +93,12 @@ def geo_headers(data: dict) -> dict:
     city = data.get("city")
     ip_val = data.get("ip")
     if ip_val and country:
-        h["X-IP-ADDRESS"] = ip_val
-        h["X-COUNTRY"] = country
+        h["X-IP-ADDRESS"] = _safe_hdr(str(ip_val))
+        h["X-COUNTRY"] = _safe_hdr(str(country))
         if city:
-            h["X-CITY"] = city
+            h["X-CITY"] = _safe_hdr(str(city))
     return h
 
-
 def get_client_ip(request: Request) -> str:
     """
     Zwraca IP klienta biorąc pod uwagę: