Fixed #30899 -- Lazily compiled import time regular expressions.

2 files changed, 4 insertions, 3 deletions

diff --git a/django/http/request.py b/django/http/request.py
index 98a51f57c8..933af0f13e 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -1,7 +1,6 @@
 import cgi
 import codecs
 import copy
-import re
 from io import BytesIO
 from itertools import chain
 from urllib.parse import quote, urlencode, urljoin, urlsplit
@@ -19,9 +18,10 @@ from django.utils.datastructures import (
 from django.utils.encoding import escape_uri_path, iri_to_uri
 from django.utils.functional import cached_property
 from django.utils.http import is_same_domain, limited_parse_qsl
+from django.utils.regex_helper import _lazy_re_compile
 
 RAISE_ERROR = object()
-host_validation_re = re.compile(r"^([a-z0-9.-]+|\[[a-f0-9]*:[a-f0-9\.:]+\])(:\d+)?$")
+host_validation_re = _lazy_re_compile(r"^([a-z0-9.-]+|\[[a-f0-9]*:[a-f0-9\.:]+\])(:\d+)?$")
 
 
 class UnreadablePostError(OSError):
diff --git a/django/http/response.py b/django/http/response.py
index c39519c4bb..269953c0af 100644
--- a/django/http/response.py
+++ b/django/http/response.py
@@ -17,8 +17,9 @@ from django.http.cookie import SimpleCookie
 from django.utils import timezone
 from django.utils.encoding import iri_to_uri
 from django.utils.http import http_date
+from django.utils.regex_helper import _lazy_re_compile
 
-_charset_from_content_type_re = re.compile(r';\s*charset=(?P<charset>[^\s;]+)', re.I)
+_charset_from_content_type_re = _lazy_re_compile(r';\s*charset=(?P<charset>[^\s;]+)', re.I)
 
 
 class BadHeaderError(ValueError):