newforms-admin: Merged from trunk up to [6670]. This is just before auto-escaping was checked in.

git-svn-id: http://code.djangoproject.com/svn/django/branches/newforms-admin@6761 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 34 insertions, 0 deletions

diff --git a/django/http/utils.py b/django/http/utils.py
new file mode 100644
index 0000000000..d08a9e0237
--- /dev/null
+++ b/django/http/utils.py
@@ -0,0 +1,34 @@
+"""
+Functions that modify an HTTP request or response in some way.
+"""
+
+# This group of functions are run as part of the response handling, after
+# everything else, including all response middleware. Think of them as
+# "compulsory response middleware". Be careful about what goes here, because
+# it's a little fiddly to override this behaviour, so they should be truly
+# universally applicable.
+
+def fix_location_header(request, response):
+    """
+    Ensures that we always use an absolute URI in any location header in the
+    response. This is required by RFC 2616, section 14.30.
+
+    Code constructing response objects is free to insert relative paths and
+    this function converts them to absolute paths.
+    """
+    if 'Location' in response and request.get_host():
+        response['Location'] = request.build_absolute_uri(response['Location'])
+    return response
+
+def conditional_content_removal(request, response):
+    """
+    Removes the content of responses for HEAD requests, 1xx, 204 and 304
+    responses. Ensures compliance with RFC 2616, section 4.3.
+    """
+    if 100 <= response.status_code < 200 or response.status_code in (204, 304):
+       response.content = ''
+       response['Content-Length'] = 0
+    if request.method == 'HEAD':
+        response.content = ''
+    return response
+