(PowerShell) Restart/Resume FTP Upload

Demonstrates how to restart / resume an FTP upload.

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 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
}

$success = $ftp.Disconnect()

$("File Uploaded!")