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pysftp / paramiko problem


On 13/06/2019 05:56, dieter wrote:
> Robin Becker <robin at reportlab.com> writes:
>> On 12/06/2019 05:59, dieter wrote:
>>> Robin Becker <robin at reportlab.com> writes:
>>>> I am trying to convert older code that uses ftplib as the endpoint has switched to sftp only.
>> ...
>> Well with real sftp I can cd to that path so if it is a symlink it goes somewhere.
>>
>> With pysftp I am unable to chdir or cd into it. With a bit of
>> difficulty I can use subprocess + sshpass + sftp to do the required
>> transfer.
> 
> Maybe, the problem is the "u" prefix.
> Can you try your script with Python 3 or encode the unicode
> into a native ``str``?
> 
no same happens in a fresh python 3.6 environment

> $ cat - > tsftp.py
> def main():
>     import pysftp
>     with pysftp.Connection('ftp.remote.com', username='me', password='ucl20                                                                 11') as sftp:
>         print('top level')
>         print(sftp.listdir())
>         print(sftp.normalize('XXXX'))
> 
> if __name__ == '__main__':
>     main()
> (tpy3) rptlab at app1:~/tmp/tpy3
> $ python tsftp.py
> top level
> ['XXXX']
> Traceback (most recent call last):
>   File "tsftp.py", line 9, in <module>
>     main()
>   File "tsftp.py", line 6, in main
>     print(sftp.normalize('XXXX'))
>   File "/home/rptlab/tmp/tpy3/lib/python3.6/site-packages/pysftp/__init__.py", line 640, in normalize
>     return self._sftp.normalize(remotepath)
>   File "/home/rptlab/tmp/tpy3/lib/python3.6/site-packages/paramiko/sftp_client.py", line 632, in normalize
>     t, msg = self._request(CMD_REALPATH, path)
>   File "/home/rptlab/tmp/tpy3/lib/python3.6/site-packages/paramiko/sftp_client.py", line 813, in _request
>     return self._read_response(num)
>   File "/home/rptlab/tmp/tpy3/lib/python3.6/site-packages/paramiko/sftp_client.py", line 865, in _read_response
>     self._convert_status(msg)
>   File "/home/rptlab/tmp/tpy3/lib/python3.6/site-packages/paramiko/sftp_client.py", line 894, in _convert_status
>     raise IOError(errno.ENOENT, text)
> FileNotFoundError: [Errno 2] No such file.

this is what real sftp does

> (tpy3) rptlab at app1:~/tmp/tpy3
> $ sshpass -p ucl2011 sftp me at ftp.remote.com
> Connected to ftp.remote.com.
> sftp> cd XXXX
> sftp> pwd
> Remote working directory: /XXXX
> sftp> ls
> OLD GR ........
>   ZZZZZ.pdf
> sftp> ^D
> (tpy3) rptlab at app1:~/tmp/tpy3



-- 
Robin Becker