redirect.py

def detect_mobile(f):
    def wrapped(*args, **kwargs):
        request = args[0]
        if request.mobile and not request.tablet:
            path_lang = request.path.find('/en/')
            if path_lang != -1 and request.path.find('/mobile/') == -1:
                return HttpResponseRedirect('/en/mobile' + request.path[3:])
            return HttpResponseRedirect('/mobile' + request.path)
        return f(*args, **kwargs)

    return wrapped