client2.py 文件源码

def _getEndpoint(self, scheme, host, port):
        """
        Get an endpoint for the given host and port, using a transport
        selected based on scheme.

        @param scheme: A string like C{'http'} or C{'https'} (the only two
            supported values) to use to determine how to establish the
            connection.

        @param host: A C{str} giving the hostname which will be connected to in
            order to issue a request.

        @param port: An C{int} giving the port number the connection will be
            on.

        @return: An endpoint which can be used to connect to given address.
        """
        kwargs = {}
        if self._connectTimeout is not None:
            kwargs['timeout'] = self._connectTimeout
        kwargs['bindAddress'] = self._bindAddress
        if scheme == 'http':
            return TCP4ClientEndpoint(self._reactor, host, port, **kwargs)
        elif scheme == 'https':
            return SSL4ClientEndpoint(self._reactor, host, port,
                                      self._wrapContextFactory(host, port),
                                      **kwargs)
        else:
            raise SchemeNotSupported("Unsupported scheme: %r" % (scheme,))