auth.py 文件源码

def _build_credentials_tuple(mech, source, user, passwd, extra):
    """Build and return a mechanism specific credentials tuple.
    """
    user = _unicode(user)
    if mech == 'GSSAPI':
        properties = extra.get('authmechanismproperties', {})
        service_name = properties.get('SERVICE_NAME', 'mongodb')
        props = GSSAPIProperties(service_name=service_name)
        # No password, source is always $external.
        return MongoCredential(mech, '$external', user, None, props)
    elif mech == 'MONGODB-X509':
        return MongoCredential(mech, '$external', user, None, None)
    else:
        if passwd is None:
            raise ConfigurationError("A password is required.")
        return MongoCredential(mech, source, user, _unicode(passwd), None)