Fixed #31858 -- Reallowed whitespaces in URL paths outside of parameters.

Regression in 22394bd3a18a7d9a8957a0b431f8ae4e5ca03a8c.

Thanks David Smith for the review.

1 files changed, 5 insertions, 2 deletions

diff --git a/django/urls/resolvers.py b/django/urls/resolvers.py
index 9f4d84d5a2..5e3e6dea16 100644
--- a/django/urls/resolvers.py
+++ b/django/urls/resolvers.py
@@ -208,8 +208,6 @@ def _route_to_regex(route, is_endpoint=False):
     For example, 'foo/<int:pk>' returns '^foo\\/(?P<pk>[0-9]+)'
     and {'pk': <django.urls.converters.IntConverter>}.
     """
-    if not set(route).isdisjoint(string.whitespace):
-        raise ImproperlyConfigured("URL route '%s' cannot contain whitespace." % route)
     original_route = route
     parts = ['^']
     converters = {}
@@ -218,6 +216,11 @@ def _route_to_regex(route, is_endpoint=False):
         if not match:
             parts.append(re.escape(route))
             break
+        elif not set(match.group()).isdisjoint(string.whitespace):
+            raise ImproperlyConfigured(
+                "URL route '%s' cannot contain whitespace in angle brackets "
+                "<…>." % original_route
+            )
         parts.append(re.escape(route[:match.start()]))
         route = route[match.end():]
         parameter = match['parameter']