(PowerShell) SFTP Fsync -- Flush an Open File on the Server

Demonstrates how to flush the contents of an open file on the server. This example only works for servers that implement the fsync@openssh.com extension.

Note: This example requires Chilkat v9.5.0.71 or later.

Chilkat .NET Downloads Chilkat .NET Assemblies

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

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

$sftp = New-Object Chilkat.SFtp

# Pass a domain or IP address..
$success = $sftp.Connect("my-sftp-server.com",22)
if ($success -eq $true) {
    $success = $sftp.AuthenticatePw("mySFtpLogin","mySFtpPassword")
}

if ($success -eq $true) {
    $success = $sftp.InitializeSftp()
}

if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

# Open a file on the server for writing.
$handle = $sftp.OpenFile("myTest.txt","writeOnly","createTruncate")
if ($sftp.LastMethodSuccess -ne $true) {
    $($sftp.LastErrorText)
    exit
}

# Write some text to the file:
$success = $sftp.WriteFileText($handle,"ansi","abcdefghijklmnopqrstuvwxyz")
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

# Make sure the server flushes what we wrote to the disk..
# (this is requires a server that implements the fsync@openssh.com SFTP protocol extension)
$success = $sftp.Fsync($handle)
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

# ....
# ....

$success = $sftp.WriteFileText($handle,"ansi","ABCDEFGHIJKLMNOPQRSTUVWXYZ")
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

# Close the file.
$success = $sftp.CloseHandle($handle)
if ($success -ne $true) {
    $($sftp.LastErrorText)
    exit
}

$("Success.")