Python FTPS client with implicit TLS and option to Ignore PASV hostname

# Combines several solutions found on the internet

class ImplicitFTP_TLS(ftplib.FTP_TLS):
    """FTP_TLS subclass to support implicit FTPS."""
    """Constructor takes a boolean parameter ignore_PASV_host whether o ignore the hostname"""
    """in the PASV response, and use the hostname from the session instead"""
    def __init__(self, *args, **kwargs):
        self.ignore_PASV_host = kwargs.get('ignore_PASV_host') == True
        super().__init__(*args, {k: v for k, v in kwargs.items() if not k == 'ignore_PASV_host'})
        self._sock = None

    @property
    def sock(self):
        """Return the socket."""
        return self._sock

    @sock.setter
    def sock(self, value):
        """When modifying the socket, ensure that it is ssl wrapped."""
        if value is not None and not isinstance(value, ssl.SSLSocket):
            value = self.context.wrap_socket(value)
        self._sock = value

    def ntransfercmd(self, cmd, rest=None):
        """Override the ntransfercmd method"""
        conn, size = ftplib.FTP.ntransfercmd(self, cmd, rest)
        conn = self.sock.context.wrap_socket(
            conn, server_hostname=self.host, session=self.sock.session
        )
        return conn, size        
     
    def makepasv(self):
        host, port = super().makepasv()
        return (self.host if self.ignore_PASV_host else host), port        

Worked for me. Thank you for saving me so much time, I was in a very deep rabbit hole without this. Thank you!

Thanks for the helpful post—our team encountered a similar issue and wanted to share how we resolved it.

We had no problems running this on Python 3.8 and 3.9. However, after upgrading to Python 3.11, we started seeing the following SSL error:

ssl.SSLEOFError: [SSL: UNEXPECTED_EOF_WHILE_READING] EOF occurred in violation of protocol (_ssl.c:2716)

After some investigation, we found it might be related to this issue:
https://bugs.python.org/issue43794

To address this, we updated our code with the following:

self.ftp = _ImplicitFTP_TLS()
self.ftp.context.options |= ssl.OP_IGNORE_UNEXPECTED_EOF
self.ftp.connect(self.host, self.port)

This fixed the problem on Python 3.11.

I was facing the same errors for 3 hours before finding this thread. Thank you so much everyone.

Thank you so much buddy! It work like a charm from scratch...