(VBScript) Restart/Resume FTP Download

Resume downloading a file from an FTP server.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

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

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Ftp2")
set ftp = CreateObject("Chilkat.Ftp2")

ftp.Hostname = "ftp.example.com"
ftp.Username = "login"
ftp.Password = "password"

' Connect and login to the FTP server.
success = ftp.Connect()
If (success <> 1) Then
    outFile.WriteLine(ftp.LastErrorText)
    WScript.Quit
End If

' 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 <> 1) Then
    outFile.WriteLine(ftp.LastErrorText)
    WScript.Quit
End If

' 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.RestartNext = 1

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

' Resume downloading...
success = ftp.GetFile(remoteFilename,localFilename)
If (success <> 1) Then
    outFile.WriteLine(ftp.LastErrorText)
    WScript.Quit
End If

success = ftp.Disconnect()

outFile.WriteLine("File Downloaded!")

outFile.Close