(Delphi DLL) Automatically Determine FTP Proxy Method

Tries each of the five possible ProxyMethod settings and returns the value (1-5) of the ProxyMethod that succeeded.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Ftp2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
ftp: HCkFtp2;
pMethod: Integer;
success: Boolean;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

ftp := CkFtp2_Create();

CkFtp2_putHostname(ftp,'www.example-code.com');
CkFtp2_putUsername(ftp,'example-code.com');
CkFtp2_putPassword(ftp,'****');

CkFtp2_putProxyHostname(ftp,'ftp.myproxyhost.com');
CkFtp2_putProxyPort(ftp,21);
// Note: Your FTP Proxy server may or may not require authentication.
CkFtp2_putProxyUsername(ftp,'myProxyUsername');
CkFtp2_putProxyPassword(ftp,'myProxyPassword');

// The ProxyMethod should be an integer value between 1 and 5.
// If you know your FTP proxy server's authentication scheme,
// you may set it directly.  To determine the ProxyMethod,
// call DetermineProxyMethod.  A return value of -1 indicates a failure.
// A return value of 0 indicates that nothing worked.
// A return value of 1-5 indicates the ProxyMethod that was 
// successful, and this should be the value used for the ProxyMethod
// property.

pMethod := CkFtp2_DetermineProxyMethod(ftp);
Memo1.Lines.Add(IntToStr(pMethod));

success := CkFtp2_Disconnect(ftp);

CkFtp2_Dispose(ftp);

end;