(PowerShell) SFTP Resume Download

Demonstrates how to resume an SFTP download from a previous partial download.

Download: Chilkat .NET Assemblies

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

#  Important: It is helpful to send the contents of the
#  sftp.LastErrorText property when requesting support.

$sftp = New-Object Chilkat.SFtp

#  Any string automatically begins a fully-functional 30-day trial.
$success = $sftp.UnlockComponent("Anything for 30-day trial")
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

#  Set some timeouts, in milliseconds:
$sftp.ConnectTimeoutMs = 5000
$sftp.IdleTimeoutMs = 10000

#  Connect to the SSH server.
#  The standard SSH port = 22
#  The hostname may be a hostname or IP address.

$hostname = "www.my-ssh-server.com"
$port = 22
$success = $sftp.Connect($hostname,$port)
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

#  Authenticate with the SSH server.  Chilkat SFTP supports
#  both password-based authenication as well as public-key
#  authentication.  This example uses password authenication.
$success = $sftp.AuthenticatePw("myLogin","myPassword")
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

#  After authenticating, the SFTP subsystem must be initialized:
$success = $sftp.InitializeSftp()
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

#  Download the file:

$localFilePath = "c:/temp/hamlet.xml"
$remoteFilePath = "subdir1/subdir2/hamlet.xml"
#  The ResumeDownloadFileByName method will check
#  the local file and begin downloading the remote file
#  at the appropriate point.  For example, if the local
#  file is already 215624 bytes long, it will begin downloading
#  the remote file at the 215625'th byte -- appending to
#  the local file.
$success = $sftp.ResumeDownloadFileByName($remoteFilePath,$localFilePath)
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

$("Success.")