conn.py 文件源码

def _try_handshake(self):
        assert self.config['security_protocol'] in ('SSL', 'SASL_SSL')
        try:
            self._sock.do_handshake()
            return True
        # old ssl in python2.6 will swallow all SSLErrors here...
        except (SSLWantReadError, SSLWantWriteError):
            pass
        except (SSLZeroReturnError, ConnectionError):
            log.warning('SSL connection closed by server during handshake.')
            self.close(Errors.ConnectionError('SSL connection closed by server during handshake'))
        # Other SSLErrors will be raised to user

        return False