Python pysftp get_r from Linux works fine on Linux but not on Windows

问题

I would like to copy an entire directory structure with files and subfolders recursively using SFTP from a Linux server to a local machine (both Windows and Linux)using Python 2.7.

I am able to ping the server and download the files using WinSCP from the same machine.

I tried the following code, works fine on Linux but not on Windows.

I tried \\, /, os.join, all gives me same error, checked permissions as well.

import os
import pysftp

cnopts = pysftp.CnOpts()
cnopts.hostkeys = None    # disable host key checking.
sftp=pysftp.Connection(\'xxxx.xxx.com\', username=\'xxx\',password=\'xxx\',cnopts=cnopts)
sftp.get_r(\'/abc/def/ghi/klm/mno\', \'C:\\pqr\',preserve_mtime=False)

File \"<stdin>\", line 1, in <module> File \"C:\\Python27\\lib\\site-packages\\pysftp_init_.py\", line 311, in get_r preserve_mtime=preserve_mtime)
File \"C:\\Python27\\lib\\site-packages\\pysftp_init_.py\", line 249, in get self._sftp.get(remotepath, localpath, callback=callback)
File \"C:\\Python27\\lib\\site-packages\\paramiko\\sftp_client.py\", line 769, in get with open(localpath, \'wb\') as fl: IOError: [Errno 2] No such file or directory: u\'C:\\\\pqr\\\\./abc/def/ghi/klm/mno/.nfs0000000615c569f500000004\'

回答1:

Indeed, pysftp get_r does not work on Windows. It uses os.sep and os.path functions for remote SFTP paths, what is wrong, as SFTP paths always use a forward slash.

But you can easily implement a portable replacement:

import os
from stat import S_ISDIR, S_ISREG

def get_r_portable(sftp, remotedir, localdir, preserve_mtime=False):
    for entry in sftp.listdir_attr(remotedir):
        remotepath = remotedir + "/" + entry.filename
        localpath = os.path.join(localdir, entry.filename)
        mode = entry.st_mode
        if S_ISDIR(mode):
            try:
                os.mkdir(localpath)
            except OSError:     
                pass
            get_r_portable(sftp, remotepath, localpath, preserve_mtime)
        elif S_ISREG(mode):
            sftp.get(remotepath, localpath, preserve_mtime=preserve_mtime)

Use it like:

get_r_portable(sftp, '/abc/def/ghi/klm/mno', 'C:\\pqr', preserve_mtime=False)

Possible modifications of the code:

Do not download empty folders while downloading from SFTP server using Python
Download files from SFTP server that are older than 5 days using Python
How to sync only the changed files from the remote directory using pysftp?

For a similar question about put_r, see:
Python pysftp put_r does not work on Windows

Side note: Do not "disable host key checking". You are losing a protection against MITM attacks.

For a correct solution, see Verify host key with pysftp.

来源：https://stackoverflow.com/questions/50118919/python-pysftp-get-r-from-linux-works-fine-on-linux-but-not-on-windows

标签

python

Linux

windows

sftp

pysftp