Python Connect over HTTP proxy with pysftp

Question

Currently, I am doing SFTP transfer using Python subprocess.POPEN and PuTTY psftp.exe.

It is working, but not really clean nor transportabl

Answer 1

I do not think that the pysftp supports proxies. Though note that the pysftp is just a wrapper around Paramiko library, which does support proxies.

So I suggest you to use Paramiko directly.

For a start see How to ssh over HTTP proxy in Python Paramiko?, particularly the answer by @tintin.

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To authenticate to the proxy, after the CONNECT command, add a Proxy-Authorization header like:

Proxy-Authorization: Basic 

where the is base-64 encoded string username:password.

auth = 'Basic ' + base64.encodebytes("username:password".encode()).decode()
args = ("123.123.123.255", 23, auth)
cmd_connect = "CONNECT {}:{} HTTP/1.1\r\nProxy-Authorization: {}\r\n\r\n".format(*args)