paramiko hangs on get after ownloading 20 MB of file

Question

I am in need of python sftp client to download files from a sftp server. I started to use Paramiko. Small files in KB works well but however when I try to download 600 MB of

Answer 1

I did two things to solve a similar problem:

1. increase window size – you say you tried that too; for me, this helped to get from a few ten MBs to half a GB but no further

2. effectively disable rekeying – this might have security implications, but helped me to get files over a GB from a weird windows sftp server

   with paramiko.Transport((_SFTP['host'], 22)) as transport:
       # SFTP FIXES
       transport.default_window_size=paramiko.common.MAX_WINDOW_SIZE
       transport.packetizer.REKEY_BYTES = pow(2, 40)  # 1TB max, this is a security degradation!
       transport.packetizer.REKEY_PACKETS = pow(2, 40)  # 1TB max, this is a security degradation!
       # / SFTP FIXES
   
       transport.connect(username=_SFTP['user'], password=_SFTP['password'])
           with paramiko.SFTPClient.from_transport(transport) as sftp:
               listdir = sftp.listdir()
               # ...
               sftp.get(remotepath=filename, localpath=localpath)