mongo_client.py 文件源码

def _cache_credentials(self, source, credentials, connect=True):
        """Add credentials to the database authentication cache
        for automatic login when a socket is created. If `connect` is True,
        verify the credentials on the server first.
        """
        if source in self.__auth_credentials:
            # Nothing to do if we already have these credentials.
            if credentials == self.__auth_credentials[source]:
                return
            raise OperationFailure('Another user is already authenticated '
                                   'to this database. You must logout first.')

        if connect:
            member = self.__ensure_member()
            sock_info = self.__socket(member)
            try:
                # Since __check_auth was called in __socket
                # there is no need to call it here.
                auth.authenticate(credentials, sock_info, self.__simple_command)
                sock_info.authset.add(credentials)
            finally:
                member.pool.maybe_return_socket(sock_info)

        self.__auth_credentials[source] = credentials