(PowerShell) Restart/Resume FTP Upload

Demonstrates how to restart / resume an FTP upload.

Download: Chilkat .NET Assemblies

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.dll")

$ftp = New-Object Chilkat.Ftp2

#  Any string unlocks the component for the 1st 30-days.
$success = $ftp.UnlockComponent("Anything for 30-day trial")
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

$ftp.Hostname = "ftp.chilkatsoft.com"
$ftp.Username = "****"
$ftp.Password = "****"

#  Connect and login to the FTP server.
$success = $ftp.Connect()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

#  Change to the remote directory where the file will be uploaded.
$success = $ftp.ChangeRemoteDir("temp")
if ($success -ne $true) {
    $($ftp.LastErrorText)
    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.RestartNext = $true

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

$success = $ftp.PutFile($localFilename,$remoteFilename)
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

$ftp.Disconnect()

$("File Uploaded!")