Download file From FTP Server with Python

ftp_d.py

import ftplib
import socket
from pathlib import Path

class MyFTP_TLS(ftplib.FTP_TLS):
    """Explicit FTPS, with shared TLS session"""
    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


HOSTNAME = "ftp.yourdomain.com"
PORT = 9999
USERNAME = "yourusername"
PASSWORD = "yourpassword"

FILE_NAME = 'file_to_be_download.csv'


# Connect FTP Server
ftp_server = MyFTP_TLS()
# ftp_server.set_debuglevel(2)

connect_r = ftp_server.connect(HOSTNAME, PORT)
print('connection status: ', connect_r)

login_s = ftp_server.login(USERNAME, PASSWORD)
print('login status: ', login_s)

data_conn_s = ftp_server.prot_p()
print('data conn status: ', data_conn_s)

ftp_server.set_pasv(True)

ftp_server.encoding = "utf-8"

print('workdir: ', ftp_server.pwd())

# cwd_s = ftp_server.cwd("/")
# print('change dir status: ', cwd_s)

ftp_server.af = socket.AF_INET6

# download single file
# with open(FILE_NAME, "wb") as file:
#     retr_s = ftp_server.retrbinary(f"RETR {FILE_NAME}", file.write)
#     print('retrive status: ', retr_s)

# download multiple file
list_file = ftp_server.nlst()

for f in list_file:
    if Path(f).exists():
        print(f'file already exist {f}')
    else:
        with open(f, "wb") as file:
            retr_s = ftp_server.retrbinary(f"RETR {f}", file.write)
            print('retrive status: ', retr_s)
  
# Close the Connection
ftp_server.quit()