[Tutor] sftp using subprocess

[David Rock]

> On Dec 3, 2018, at 16:01, Asad <asad.hasan2004 at gmail.com> wrote:
> 
> Hi All ,
> 
>        I am looking for a solution to automate downloading file using sftp
> process using :
> 
> batch.txt :contains the following two lines
> cd 12345678
> get 12345678_1.zip
> 
> 
> import subprocess
> host="abc.com"
> user="sa"
> user_host="%s@%s" % (user, host)
> sftp_process = subprocess.Popen(['sftp', '-b', 'batch.txt', user_host],
> shell=False)
> 
> however it gives error even unable to provide password .

batch mode for sftp assumes you don’t need a password.  From the manage:

     -b batchfile
             Batch mode reads a series of commands from an input batchfile instead of stdin.
             Since it lacks user interaction it should be used in conjunction with non-inter‐
             active authentication.  

You would need to set up an ssh key with a null passphrase, or set up an ssh-agent in order for that to work.

Another option would be to use pexpect to automate console input


— 
David Rock
david at graniteweb.com