sftp_client.py 文件源码

def __init__(self, sock):
        """
        Create an SFTP client from an existing `.Channel`.  The channel
        should already have requested the ``"sftp"`` subsystem.

        An alternate way to create an SFTP client context is by using
        `from_transport`.

        :param .Channel sock: an open `.Channel` using the ``"sftp"`` subsystem

        :raises:
            `.SSHException` -- if there's an exception while negotiating sftp
        """
        BaseSFTP.__init__(self)
        self.sock = sock
        self.ultra_debug = False
        self.request_number = 1
        # lock for request_number
        self._lock = threading.Lock()
        self._cwd = None
        # request # -> SFTPFile
        self._expecting = weakref.WeakValueDictionary()
        if type(sock) is Channel:
            # override default logger
            transport = self.sock.get_transport()
            self.logger = paramiko.util.get_logger(
                transport.get_log_channel() + '.sftp')
            self.ultra_debug = transport.get_hexdump()
        try:
            server_version = self._send_version()
        except EOFError:
            raise SSHException('EOF during negotiation')
        self._log(
            INFO,
            'Opened sftp connection (server version %d)' % server_version)