Delphi DLL

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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Delphi DLL

var
success: Boolean;
ftp: HCkFtp2;

begin
success := False;

ftp := CkFtp2_Create();

CkFtp2_putHostname(ftp,'ftp.example.com');
CkFtp2_putUsername(ftp,'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 1): automatically send FEAT to discover server capabilities.
CkFtp2_putAutoFeat(ftp,True);

//  AutoSyst (default 1): automatically send SYST after login to learn the server OS type.
CkFtp2_putAutoSyst(ftp,True);

//  AutoOptsUtf8 (default 1): send OPTS UTF8 ON when the FEAT response advertises UTF8.
CkFtp2_putAutoOptsUtf8(ftp,True);

//  AutoXcrc (default 0): request an XCRC checksum after each upload and treat a mismatch as
//  a failure, giving automatic post-upload verification where the server supports XCRC.
CkFtp2_putAutoXcrc(ftp,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.
CkFtp2_putPassword(ftp,'myPassword');

success := CkFtp2_Connect(ftp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

Memo1.Lines.Add('Connected with the configured automatic features.');

success := CkFtp2_Disconnect(ftp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

CkFtp2_Dispose(ftp);