(PowerShell) Restart/Resume FTP Download

Resume downloading a file from an FTP server.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$ftp = New-Object 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 -ne $true) {
    $($ftp.LastErrorText)
    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 -ne $true) {
    $($ftp.LastErrorText)
    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.RestartNext = $true

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

# Resume downloading...
$success = $ftp.GetFile($remoteFilename,$localFilename)
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

$success = $ftp.Disconnect()

$("File Downloaded!")