B4X

SFTP Fsync -- Flush an Open File on the Server

See more SFTP Examples

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.

B4X

Dim success As Boolean = False

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

Dim sftp As ChilkatSFtp
sftp.Initialize("sftp")

'  Pass a domain or IP address..
success = 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
    Log(sftp.LastErrorText)
    Return
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
    Log(sftp.LastErrorText)
    Return
End If


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


'  ....
'  ....

success = sftp.WriteFileText(handle, "ansi", "ABCDEFGHIJKLMNOPQRSTUVWXYZ")
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


'  Close the file.
success = sftp.CloseHandle(handle)
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


Log("Success.")