keep_method.diff

diff --git a/http/response.py b/http/response.py
index f7d248e..dbd1c34 100644
--- a/http/response.py
+++ b/http/response.py
@@ -16,7 +16,7 @@ from django.core.serializers.json import DjangoJSONEncoder
 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.http import http_date, is_new_redirect_supported
 
 _charset_from_content_type_re = re.compile(r';\s*charset=(?P<charset>[^\s;]+)', re.I)
 
@@ -470,11 +470,15 @@ class HttpResponseRedirectBase(HttpResponse):
 
 
 class HttpResponseRedirect(HttpResponseRedirectBase):
-    status_code = 302
+    def __init__(self, *args, request=None, **kwargs):
+        self.status_code = 307 if is_new_redirect_supported(request) else 301
+        super().__init__(*args, **kwargs)
 
 
 class HttpResponsePermanentRedirect(HttpResponseRedirectBase):
-    status_code = 301
+    def __init__(self, *args, request=None, **kwargs):
+        self.status_code = 308 if is_new_redirect_supported(request) else 302
+        super().__init__(*args, **kwargs)
 
 
 class HttpResponseNotModified(HttpResponse):
diff --git a/middleware/common.py b/middleware/common.py
index a18fbe7..a339899 100644
--- a/middleware/common.py
+++ b/middleware/common.py
@@ -57,7 +57,7 @@ class CommonMiddleware(MiddlewareMixin):
         # Return a redirect if necessary
         if redirect_url or path != request.get_full_path():
             redirect_url += path
-            return self.response_redirect_class(redirect_url)
+            return self.response_redirect_class(redirect_url, request=request)
 
     def should_redirect_with_slash(self, request):
         """
@@ -104,7 +104,7 @@ class CommonMiddleware(MiddlewareMixin):
         # a path with a slash appended.
         if response.status_code == 404:
             if self.should_redirect_with_slash(request):
-                return self.response_redirect_class(self.get_full_path_with_slash(request))
+                return self.response_redirect_class(self.get_full_path_with_slash(request), request=request)
 
         # Add the Content-Length header to non-streaming responses if not
         # already set.
diff --git a/utils/http.py b/utils/http.py
index de1ea71..7414956 100644
--- a/utils/http.py
+++ b/utils/http.py
@@ -43,6 +43,9 @@ RFC3986_SUBDELIMS = "!$&'()*+,;="
 
 FIELDS_MATCH = re.compile('[&;]')
 
+# IE11 on Win 7/8/8.1 doesn't support 307/308 redirect
+OLD_IE_MATCH = re.compile(r'Windows NT 6\.\d;.+Trident')
+
 
 @keep_lazy_text
 def urlquote(url, safe='/'):
@@ -456,3 +459,11 @@ def escape_leading_slashes(url):
     if url.startswith('//'):
         url = '/%2F{}'.format(url[2:])
     return url
+
+def is_new_redirect_supported(request):
+    """
+    Return user agent support new redirect status code (307/308).
+    """
+    if not request:
+        return False
+    return not OLD_IE_MATCH.search(request.META['HTTP_USER_AGENT'])
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