Read tar file on remote SSH server without using FTP in Python

Question

I am creating some tar file on a remote server and I want to be able to get it to my machine. Due to security reasons I can't use FTP on that server.

So how I see it, I have two options:

get the file (as file) in some other way and then use tarfile library - if so, I need help with getting the file without FTP.
get the content of the file and then extract it.

If there is another way, I would like to hear it.

import spur

#creating the connection
shell = spur.SshShell(
    hostname=unix_host,
    username=unix_user,
    password=unix_password,
    missing_host_key=spur.ssh.MissingHostKey.accept
    )

# running ssh command that is creating a tar file on the remote server
with shell:
    command = "tar -czvf test.gz test"
    shell.run(
        ["sh", "-c", command],
        cwd=unix_path
        )

    # getting the content of the tar file to gz_file_content
    command = "cat test.gz"
    gz_file_content = shell.run(
        ["sh", "-c", command],
        cwd=unix_path
        )

More info: My project is running on a virtualenv. I am using Python 3.4.

Don't use missing_host_key=spur.ssh.MissingHostKey.accept! You are losing protection against Man-in-the-middle attacks! — Martin Prikryl
– Martin Prikryl, Commented Mar 21, 2017 at 10:06

Community · Accepted Answer · 2020-06-20 09:12:55Z

2

If you have SSH access, you have SFTP access for 99%.

So you can use the SFTP to download the file. See Download files over SSH using Python.

Or once you are using spur, see its SshShell.open method:

For instance, to copy a binary file over SSH, assuming you already have an instance of SshShell:
with ssh_shell.open("/path/to/remote", "rb") as remote_file:
    with open("/path/to/local", "wb") as local_file:
        shutil.copyfileobj(remote_file, local_file)

The SshShell.open method uses SFTP under the hood (via Paramiko library).

edited Jun 20, 2020 at 9:12

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answered Mar 21, 2017 at 10:10

Martin Prikryl

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