(CkPython) Restart/Resume FTP Download

Resume downloading a file from an FTP server.

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import sys
import chilkat

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

ftp = chilkat.CkFtp2()

ftp.put_Hostname("ftp.example.com")
ftp.put_Username("login")
ftp.put_Password("password")

# Connect and login to the FTP server.
success = ftp.Connect()
if (success != True):
    print(ftp.lastErrorText())
    sys.exit()

# Change to the remote directory where the file is located.
# This step is only necessary if the file is not in the root directory
# for the FTP account.
success = ftp.ChangeRemoteDir("temp")
if (success != True):
    print(ftp.lastErrorText())
    sys.exit()

# To resume a download, it is assumed that the partial file
# is already present on the local filesystem.
# You only need to set the RestartNext property to resume
# the download.  The Chilkat FTP component sets the resume
# point by getting the existing size of the target (local) file.
ftp.put_RestartNext(True)

localFilename = "big.zip"
remoteFilename = "big.zip"

# Resume downloading...
success = ftp.GetFile(remoteFilename,localFilename)
if (success != True):
    print(ftp.lastErrorText())
    sys.exit()

success = ftp.Disconnect()

print("File Downloaded!")