def build_url(request):
    if request.is_secure():
        protocol = 'https'
    else:
        protocol ='http'

    host = request.META['HTTP_HOST']
    if host.startswith('www.'):
        host = host[4:]
    code = host[:2]
    if code in LANGUAGES:
        host = host[3:]
    else:
        code = None
    return (code, '%s://%%s.%s%s' % (protocol, host, request.path))

class SubDomainMiddleware(object):
    def process_request(self, request):
        (active, url) = build_url(request)
        if active is None:
            print url % request.LANGUAGE_CODE
            return HttpResponsePermanentRedirect(url % request.LANGUAGE_CODE)
        else:
            translation.activate(active)
            request.LANGUAGE_CODE=active


def subdomain_context_processor(request):
    (active, url) = build_url(request)
    return dict(language=dict(
        active=dict(code=active,
                    name=dict(settings.LANGUAGES).get(active)),
        other=[dict(code=code,
                    name=name,
                    url=(url % code))
               for (code, name)
               in settings.LANGUAGES
               if active != code]
    ))