(VB.NET) 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.

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

Dim sftp As New Chilkat.SFtp

' Pass a domain or IP address..
Dim success As Boolean = sftp.Connect("my-sftp-server.com",22)
If (success = True) Then
    success = sftp.AuthenticatePw("mySFtpLogin","mySFtpPassword")
End If

If (success = True) Then
    success = sftp.InitializeSftp()
End If

If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Open a file on the server for writing.
Dim handle As String = sftp.OpenFile("myTest.txt","writeOnly","createTruncate")
If (sftp.LastMethodSuccess <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Write some text to the file:
success = sftp.WriteFileText(handle,"ansi","abcdefghijklmnopqrstuvwxyz")
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' 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 <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' ....
' ....

success = sftp.WriteFileText(handle,"ansi","ABCDEFGHIJKLMNOPQRSTUVWXYZ")
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Close the file.
success = sftp.CloseHandle(handle)
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")