asyncdns.py 文件源码

def add_to_loop(self, loop, ref=False):
        """ Bind the resolver to specified EventLoop and add UDP socket to the loop.

        """
        if self._loop:
            raise Exception('already add to loop')
        self._loop = loop
        # TODO when dns server is IPv6
        self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM,
                                   socket.SOL_UDP)
        self._sock.setblocking(False)
        loop.add(self._sock, eventloop.POLL_IN)
        loop.add_handler(self.handle_events, ref=ref)