B4X

FTP Automatic Post-Connect Commands

Demonstrates the AutoFeat, AutoSyst, AutoOptsUtf8, and AutoXcrc properties, which control commands Chilkat issues automatically around connecting and transferring.

Background: Chilkat normally probes and adapts to a server on its own: AutoFeat discovers capabilities with FEAT, AutoSyst learns the OS type to parse legacy listings, and AutoOptsUtf8 enables UTF-8 filenames when the server advertises it. These are on by default and rarely worth changing. AutoXcrc is the exception worth enabling deliberately — it verifies each upload with the server's XCRC checksum, catching corruption automatically where supported.

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B4X

Dim success As Boolean = False

Dim ftp As ChilkatFtp2
ftp.Initialize("ftp")

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

'  These auto-* properties control commands Chilkat sends automatically after connecting.  They
'  are on/off by default as noted, and are rarely changed.

'  AutoFeat (default True): automatically send FEAT to discover server capabilities.
ftp.AutoFeat = True

'  AutoSyst (default True): automatically send SYST after login to learn the server OS type.
ftp.AutoSyst = True

'  AutoOptsUtf8 (default True): send OPTS UTF8 ON when the FEAT response advertises UTF8.
ftp.AutoOptsUtf8 = True

'  AutoXcrc (default False): request an XCRC checksum after each upload and treat a mismatch as
'  a failure, giving automatic post-upload verification where the server supports XCRC.
ftp.AutoXcrc = True

'  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 = False Then
    Log(ftp.LastErrorText)
    Return
End If


Log("Connected with the configured automatic features.")

success = ftp.Disconnect
If success = False Then
    Log(ftp.LastErrorText)
    Return
End If