From 706659d2bb6af350903a5b5ee9d1e09f95f6a9a3 Mon Sep 17 00:00:00 2001
From: Malcolm Tredinnick <malcolm.tredinnick@gmail.com>
Date: Sat, 20 Oct 2007 05:58:48 +0000
Subject: [PATCH] Changed the way we handle HTTP headers internally so that
 they appear case-insensitive, but the original case is preserved for output.
 This increases the chances of working with non-compliant clients without
 changing the external interface. Fixed #2970.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6546 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/http/__init__.py | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/django/http/__init__.py b/django/http/__init__.py
index d2e1ca0b39..6fe6d0d760 100644
--- a/django/http/__init__.py
+++ b/django/http/__init__.py
@@ -261,19 +261,23 @@ class HttpResponse(object):
         else:
             self._container = [content]
             self._is_string = True
-        self._headers = {'content-type': content_type}
         self.cookies = SimpleCookie()
         if status:
             self.status_code = status
 
+        # _headers is a mapping of the lower-case name to the original case of
+        # the header (required for working with legacy systems) and the header
+        # value.
+        self._headers = {'content-type': ('Content-Type', content_type)}
+
     def __str__(self):
         "Full HTTP message, including headers"
         return '\n'.join(['%s: %s' % (key, value)
-            for key, value in self._headers.items()]) \
+            for key, value in self._headers.values()]) \
             + '\n\n' + self.content
 
     def __setitem__(self, header, value):
-        self._headers[header.lower()] = value
+        self._headers[header.lower()] = (header, value)
 
     def __delitem__(self, header):
         try:
@@ -282,7 +286,7 @@ class HttpResponse(object):
             pass
 
     def __getitem__(self, header):
-        return self._headers[header.lower()]
+        return self._headers[header.lower()][1]
 
     def has_header(self, header):
         "Case-insensitive check for a header"
@@ -291,10 +295,10 @@ class HttpResponse(object):
     __contains__ = has_header
 
     def items(self):
-        return self._headers.items()
+        return self._headers.values()
 
     def get(self, header, alternate):
-        return self._headers.get(header.lower(), alternate)
+        return self._headers.get(header.lower(), (None, alternate))[1]
 
     def set_cookie(self, key, value='', max_age=None, expires=None, path='/', domain=None, secure=None):
         self.cookies[key] = value