ntransfercmd of FTP class in Python

Method Name:

ntransfercmd

Method Signature:

ntransfercmd(cmd, rest=None)

Parameters:

cmd – An FTP transfer command like STOR and RETR.

rest – A location in the file from where the transfer has to be resumed. The default value is None.

Return Value:

A tuple containing the socket and the expected size of the data.

Overview:

The method ntransfercmd() executes a transfer command like STOR, RETR and others.
Using ntransfercmd() files can be downloaded from or uploaded to an FTP server in either binary mode or text mode.
The file transfer can be done in either active mode or passive mode.
The method is similar to transfercmd() but differs in return value. It returns a tuple containing a socket and the expected size of data.

Example:

# Example Python Program to upload a file from an FTP client

# in active mode

from ftplib import FTP

# Instantiate an FTP object

ftpObject = FTP()

# Connect to the FTP server

ftpObject.connect(host="speedtest.tele2.net");

# Enable active mode

ftpObject.set_pasv(False);

# Login to the FTP server

serverResponse = ftpObject.login();

print(serverResponse);

# Change the working directory(if required)

ftpObject.cwd("/upload");

# Initiate a file upload to the server in active mode

downloadCommand = "STOR 1KB.zip";

# Tell the server that forthcoming file transfer is in binary mode

serverResponse = ftpObject.sendcmd('TYPE I');

print(serverResponse);

with open('512KB.zip', 'rb') as fd:

with ftpObject.ntransfercmd(downloadCommand)[0] as dataConnection:

while 1:

buffer = fd.read(1024);

if buffer == b'':

break;

dataConnection.sendall(buffer);

print(ftpObject.voidresp());

Output:

230 Login successful.

200 Switching to Binary mode.

226 Transfer complete.

Ntransfercmd of FTP class in Python