PowerShell

Set a Remote FTP File's Last-Modified Time

Demonstrates the Chilkat Ftp2.SetRemoteFileDateTimeStr method, which sets the last-modified time of a remote file. The first argument is an RFC 822 date-time string and the second is the remote filename.

Background: An upload normally leaves the remote file stamped with the time it arrived, which loses the original modification time — a problem for backups, mirrors, and timestamp-based sync. This method restores it, and Chilkat converts the supplied time to UTC before sending a server-supported command (typically MFMT). Whether it is honored depends on the server implementing such a command and granting permission.

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

$success = $false

#  Demonstrates the Ftp2.SetRemoteFileDateTimeStr method, which sets the last-modified time of a
#  remote file.  The 1st argument is an RFC 822 date-time string and the 2nd is the remote
#  filename.

$ftp = New-Object Chilkat.Ftp2

$ftp.Hostname = "ftp.example.com"
$ftp.Username = "myFtpLogin"

#  Normally you would not hard-code the password in source.  You should instead obtain it
#  from an interactive prompt, environment variable, or a secrets vault.
$ftp.Password = "myPassword"

$success = $ftp.Connect()
if ($success -eq $false) {
    $($ftp.LastErrorText)
    exit
}

#  Chilkat converts the date to UTC and sends a server-supported timestamp-setting command.
$success = $ftp.SetRemoteFileDateTimeStr("Fri, 10 Jul 2026 20:15:30 -0600","public_html/report.pdf")
if ($success -eq $false) {
    $($ftp.LastErrorText)
    exit
}

$("Remote file timestamp set.")

$success = $ftp.Disconnect()
if ($success -eq $false) {
    $($ftp.LastErrorText)
    exit
}