(Delphi DLL) SOCKS4 and SOCKS5 Proxy for FTP

Demonstrates how to connect to an FTP server through a SOCKS4 or SOCKS5 proxy. Both SSL/TLS and non-secure FTP communications may use SOCKS4 and SOCKS5 proxies.

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;
success: Boolean;
localFilename: PWideChar;
remoteFilename: PWideChar;

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,'ftp.example.com');
CkFtp2_putUsername(ftp,'login');
CkFtp2_putPassword(ftp,'password');

// To use a SOCKS4 or SOCKS5 proxy, simply set the following
// properties prior to connecting:
// The SOCKS hostname may be a domain name or 
// IP address:
CkFtp2_putSocksHostname(ftp,'www.mysocksproxyserver.com');
CkFtp2_putSocksPort(ftp,1080);
CkFtp2_putSocksUsername(ftp,'myProxyLogin');
CkFtp2_putSocksPassword(ftp,'myProxyPassword');
// Set the SOCKS version to 4 or 5 based on the version
// of the SOCKS proxy server:
CkFtp2_putSocksVersion(ftp,5);
// Note: SOCKS4 servers only support usernames without passwords.
// SOCKS5 servers support full login/password authentication.

// Connect and login to the FTP server.
success := CkFtp2_Connect(ftp);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

// Change to the remote directory where the file is located.
// This step is only necessary if the file is not in the root directory
// for the FTP account.
success := CkFtp2_ChangeRemoteDir(ftp,'junk');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

// Download a file.
localFilename := 'c:/temp/hamlet.xml';
remoteFilename := 'hamlet.xml';

success := CkFtp2_GetFile(ftp,remoteFilename,localFilename);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

success := CkFtp2_Disconnect(ftp);

Memo1.Lines.Add('File Downloaded!');

CkFtp2_Dispose(ftp);

end;