asyncadapter.py 文件源码

def _connect(self, sock, sa):
        while not self._canceled and not ABORT_FLAG_FUNCTION():
            time.sleep(0.01)
            self._check_timeout()  # this should be done at the beginning of each loop
            status = sock.connect_ex(sa)
            if not status or status in (errno.EISCONN, WIN_EISCONN):
                break
            elif status in (errno.EINPROGRESS, WIN_EWOULDBLOCK):
                self.deadline = time.time() + self._timeout.getConnectTimeout()
            # elif status in (errno.EWOULDBLOCK, errno.EALREADY) or (os.name == 'nt' and status == errno.WSAEINVAL):
            #     pass
            yield

        if self._canceled or ABORT_FLAG_FUNCTION():
            raise CanceledException('Request canceled')

        error = sock.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
        if error:
            # TODO: determine when this case can actually happen
            raise socket.error((error,))