Restart/Resume FTP Upload

Demonstrates how to restart / resume an FTP upload.

Download Chilkat Python Library

import sys
import chilkat

ftp = chilkat.CkFtp2()

#  Any string unlocks the component for the 1st 30-days.
success = ftp.UnlockComponent("Anything for 30-day trial")
if (success != True):
    print ftp.lastErrorText()
    sys.exit()

ftp.put_Hostname("ftp.chilkatsoft.com")
ftp.put_Username("****")
ftp.put_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 will be uploaded.
success = ftp.ChangeRemoteDir("temp")
if (success != True):
    print ftp.lastErrorText()
    sys.exit()

#  In this example, assume that a previous FTP upload failed,
#  and the incomplete file (bigFile.zip) exists on the FTP server.
#  You only need to set the RestartNext property to resume
#  the upload.  When RestartNext is set, the next call
#  to PutFile (or PutFileFromBinaryData, PutFileFromTextData)
#  will automatically resume the upload from the point of failure.
#  (The way it works is that the FTP component sends a "SIZE"
#  command to the FTP server to find out how many bytes of
#  the file already exist on the server.  It then begins
#  uploading from that point.

#  Note: After PutFile is called, the RestartNext property
#  is automatically set to false.
ftp.put_RestartNext(True)

#  Upload a file with restart.
localFilename = "bigFile.zip"
remoteFilename = "bigFile.zip"

success = ftp.PutFile(localFilename,remoteFilename)
if (success != True):
    print ftp.lastErrorText()
    sys.exit()

ftp.Disconnect()

print "File Uploaded!"