normalize path

contracts/views.py

+import os
+
 from xml.etree import ElementTree
 
 import requests
@@ -427,11 +429,14 @@ def get_ares_info(request, ico: int):
 
 
 def handle_404(request, exception):
-    path = request.get_full_path()
+    path = os.path.normpath(request.get_full_path())
 
     archive_url = f"https://smlouvy-archiv.pirati.cz{path}"
     archive_response = requests.get(archive_url)
 
+    # Quick dirty check for whether the page found is an actual contract
+    was_found = archive_response.ok and "Datum podpisu" in str(archive_response.content)
+
     return render(
         request,
         "contracts/404.html",
@@ -439,7 +444,7 @@ def handle_404(request, exception):
             **get_base_context(request),
             "title": "Stránka nenalezena",
             "description": "",
-            "archive_page_exists": archive_response.ok,
+            "archive_page_exists": was_found,
             "archive_url": archive_url,
         }
     )