From df1ad561b124450388a696e668fa6549f2bbe446 Mon Sep 17 00:00:00 2001
From: Jannis Leidel <jannis@leidel.info>
Date: Tue, 16 Feb 2010 12:52:04 +0000
Subject: [PATCH] [1.1.X] Fixed #7720 - Fallback to the base language if the
 sub language given in the language cookie doesn't exist. Thanks, djoume and
 Ramiro Morales.

Backport of r12442.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12452 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/utils/translation/trans_real.py |  4 ++++
 tests/regressiontests/i18n/misc.py     | 25 +++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/django/utils/translation/trans_real.py b/django/utils/translation/trans_real.py
index 6e7fb8cf50..74214735ef 100644
--- a/django/utils/translation/trans_real.py
+++ b/django/utils/translation/trans_real.py
@@ -354,6 +354,10 @@ def get_language_from_request(request):
             return lang_code
 
     lang_code = request.COOKIES.get(settings.LANGUAGE_COOKIE_NAME)
+
+    if lang_code and lang_code not in supported:
+        lang_code = lang_code.split('-')[0] # e.g. if fr-ca is not supported fallback to fr
+
     if lang_code and lang_code in supported and check_for_language(lang_code):
         return lang_code
 
diff --git a/tests/regressiontests/i18n/misc.py b/tests/regressiontests/i18n/misc.py
index 7a82af0050..0a5b10cbc0 100644
--- a/tests/regressiontests/i18n/misc.py
+++ b/tests/regressiontests/i18n/misc.py
@@ -85,6 +85,21 @@ source tree.
 >>> r.META = {'HTTP_ACCEPT_LANGUAGE': 'es-ar,de'}
 >>> g(r)
 'es-ar'
+
+# Now test that we parse language preferences stored in a cookie correctly.
+>>> from django.conf import settings
+>>> r.COOKIES = {settings.LANGUAGE_COOKIE_NAME: 'pt-br'}
+>>> r.META = {}
+>>> g(r)
+'pt-br'
+>>> r.COOKIES = {settings.LANGUAGE_COOKIE_NAME: 'pt'}
+>>> r.META = {}
+>>> g(r)
+'pt'
+>>> r.COOKIES = {settings.LANGUAGE_COOKIE_NAME: 'es'}
+>>> r.META = {'HTTP_ACCEPT_LANGUAGE': 'de'}
+>>> g(r)
+'es'
 """
 
 # Python 2.3 and 2.4 return slightly different results for completely bogus
@@ -98,9 +113,14 @@ This test assumes there won't be a Django translation to a US variation
 of the Spanish language, a safe assumption. When the user sets it
 as the preferred language, the main 'es' translation should be selected
 instead.
+>>> r.COOKIES = {}
 >>> r.META = {'HTTP_ACCEPT_LANGUAGE': 'es-us'}
 >>> g(r)
 'es'
+>>> r.COOKIES = {settings.LANGUAGE_COOKIE_NAME: 'es-us'}
+>>> r.META = {}
+>>> g(r)
+'es'
 """
 
 tests += """
@@ -108,7 +128,12 @@ This tests the following scenario: there isn't a main language (zh)
 translation of Django but there is a translation to variation (zh_CN)
 the user sets zh-cn as the preferred language, it should be selected by
 Django without falling back nor ignoring it.
+>>> r.COOKIES = {}
 >>> r.META = {'HTTP_ACCEPT_LANGUAGE': 'zh-cn,de'}
 >>> g(r)
 'zh-cn'
+>>> r.COOKIES = {settings.LANGUAGE_COOKIE_NAME: 'zh-cn'}
+>>> r.META = {'HTTP_ACCEPT_LANGUAGE': 'de'}
+>>> g(r)
+'zh-cn'
 """