override.py 文件源码

def get_language_from_request(request, check_path=False):
    """Try to get the user's preferred language by first checking the
    cookie and then by checking the HTTP language headers.

    If all fails, try fall back to default language.
    """
    supported = dict(supported_langs())
    for lang_getter in (get_lang_from_session,
                        get_lang_from_cookie,
                        get_lang_from_http_header):
        lang = lang_getter(request, supported)
        if lang is not None:
            return lang
    from django.conf import settings
    return settings.LANGUAGE_CODE