我正在使用以下SSH配置下载一些文件:

Host proxy 
    Hostname      proxy.example.com 
    User          proxyuser 
    IdentityFile  ~/.ssh/proxy_id_rsa 
 
Host target       # uses password auth 
    Hostname      target.example.com 
    User          targetuser 
    ProxyCommand  ssh proxy nc %h %p 

我正在尝试自动下载文件-当前使用paramiko，但如果更容易的话可以使用另一个库。

这是我根据其他答案尝试的方法:

from paramiko.proxy import ProxyCommand 
from paramiko.transport import Transport 
from paramiko.sftp_client import SFTPClient 
 
proxy = ProxyCommand('ssh -i /Users/ben/.ssh/proxy_id_rsa proxyuser@proxy.example.com nc target.example.com 22') 
client = SFTPClient(proxy) 
client.connect(username='targetuser', password='targetpassword') 

但是，这会引发错误

Traceback (most recent call last): 
  File "sftp.py", line 6, in <module> 
    client = SFTPClient(proxy) 
  File "/Users/ben/.virtualenvs/venv/lib/python3.5/site-packages/paramiko/sftp_client.py", line 99, in __init__ 
    server_version = self._send_version() 
  File "/Users/ben/.virtualenvs/venv/lib/python3.5/site-packages/paramiko/sftp.py", line 105, in _send_version 
    t, data = self._read_packet() 
  File "/Users/ben/.virtualenvs/venv/lib/python3.5/site-packages/paramiko/sftp.py", line 177, in _read_packet 
    raise SFTPError('Garbage packet received') 
paramiko.sftp.SFTPError: Garbage packet received 

不幸的是，错误消息不是很有帮助，所以我不知所措。我无法更改 target上的配置，如果可以避免，我宁愿不更改 proxy上的配置。有什么建议么？

请您参考如下方法:

解决了以下问题:

class PatchedProxyCommand(ProxyCommand): 
    # work around https://github.com/paramiko/paramiko/issues/789 
 
    @property 
    def closed(self): 
        return self.process.returncode is not None 
 
    @property 
    def _closed(self): 
        # Concession to Python 3 socket-like API 
        return self.closed 
 
    def close(self): 
        self.process.kill() 
        self.process.poll() 
 
proxy = PatchedProxyCommand('ssh -i /Users/ben/.ssh/proxy_id_rsa ' 
                            'proxyuser@proxy.example.com nc target.example.com 22') 
 
transport = Transport(proxy) 
key = HostKeyEntry.from_line('target.example.com ssh-rsa ' 
                             'AAAAB3NzaC1yc2EAAAA/base64+stuff==').key 
transport.connect(hostkey=key, 
                  username='targetuser', password='targetpass') 
sftp = SFTPClient.from_transport(transport) 
 
print(sftp.listdir())