Session Reuse Required Error

[jneilliii]

• Package Name: iot-ftps-client
• Package Version: 1.1.1
• Operating System: Windows 10 64bit
• Python Version: 3.10

Describe the bug
Connecting to Bambu Labs X1C ftps server, which appears to be running vsFTPd 3.0.3 based on the welcome message, get an error unexpected exception occurred: 522 SSL connection failed: session reuse required when attempting to do something simple like ftps_client.list_files("/"). Trying to upload a file I get unexpected exception occurred: EOF occurred in violation of protocol (_ssl.c:2426)

To Reproduce
Steps to reproduce the behavior:

1. Used this code to connect and attempt to list and upload file.

from iot.ftps.client import IoTFTPSClient

ftps_client = IoTFTPSClient(
    ftps_host="myServerIP",
    ftps_port=990,
    ftps_user="myServerUsername",
    ftps_pass="myServerPass***",
    ssl_implicit=True,
)

ftps_client.list_files("/")

ftps_client.upload_file("C:\\Users\\jneil\Documents\\3D Prints\\PrinterUprades\\OrdBotHadron\\OctoprintRelated\\printer-ws-client\\bambu_local\\test.3mf", "/test.3mf")

Expected behavior
To be able to list and upload files.

Screenshots

Additional context
I'm able to connect and list/upload files using filezilla ftp client as described in the link below without issue, so know the login information is correct.

https://forum.bambulab.com/t/we-can-now-connect-to-ftp-on-the-p1p/6464

[jneilliii]

I think I may have found a fix for this use case from this stack overflow post. But applying the ntransfercmd patch seems to have broke the storbinary one. This is what I ended up with.

class ImplicitTLS(ftplib.FTP_TLS):
    """ftplib.FTP_TLS sub-class to support implicit SSL FTPS"""

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self._sock = None

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

    @sock.setter
    def sock(self, value):
        """wrap and set SSL socket"""
        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):
        conn, size = ftplib.FTP.ntransfercmd(self, cmd, rest)
        if self._prot_p:
            conn = self.context.wrap_socket(conn,
                                            server_hostname=self.host,
                                            session=self.sock.session)  # this is the fix
        return conn, size