Django QueryParameterLocaleMiddleware

locale.py

from django.middleware import locale
from django.utils import translation

class QueryParameterLocaleMiddleware(locale.LocaleMiddleware):
    """
    Django's LocaleMiddleware picks the locale setting of the request from 
    multiple sources such as a cookie, Accept-Language header and server-side
    session.
    
    This middleware adds one more way to specify the language by supplying
    'locale' query parameter. It's value should be set to the same language 
    codes as required for Accept-Language.
    
    Works with any HTTP verb (GET, POST, whatever)
    """
    def process_request(self, request):
        """
        Overrides the parent class to try getting the language code from
        request parameter.
        """
        if request.REQUEST.has_key('locale'):
            translation.activate(request.REQUEST['locale'])
            request.LANGUAGE_CODE = translation.get_language()
        else:
            super(QueryParameterLocaleMiddleware, self).process_request(request)