(Delphi ActiveX) Socket/SSL/TLS through SOCKS5 / SOCKS4 Proxy

Demonstrates how to use the Chilkat Socket/SSL/TLS component/library with a SOCKS5 or SOCKS4 proxy server.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
socket: TChilkatSocket;
hostname: WideString;
ssl: Integer;
maxWaitMillisec: Integer;
success: Integer;
receivedMsg: WideString;

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

socket := TChilkatSocket.Create(Self);

// To use a SOCKS4 or SOCKS5 proxy, simply set the following
// properties prior to calling Connect.  The connection may be SSL/TLS or 
// non-secure - both will work with a SOCKS proxy.
// The SOCKS hostname may be a domain name or 
// IP address:
socket.SocksHostname := 'www.mysocksproxyserver.com';
socket.SocksPort := 1080;
socket.SocksUsername := 'myProxyLogin';
socket.SocksPassword := 'myProxyPassword';
// Set the SOCKS version to 4 or 5 based on the version
// of the SOCKS proxy server:
socket.SocksVersion := 5;
// Note: SOCKS4 servers only support usernames without passwords.
// SOCKS5 servers support full login/password authentication.

// Connect to port 5555 of 192.168.1.108.
// hostname may be a domain name or IP address.
hostname := '192.168.1.108';
ssl := 0;
maxWaitMillisec := 20000;
success := socket.Connect(hostname,5555,ssl,maxWaitMillisec);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// Set maximum timeouts for reading an writing (in millisec)
socket.MaxReadIdleMs := 10000;
socket.MaxSendIdleMs := 10000;

// The server (in this example) is going to send a "Hello World!" 
// message.  Read it:
receivedMsg := socket.ReceiveString();
if (socket.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// Close the connection with the server
// Wait a max of 20 seconds (20000 millsec)
success := socket.Close(20000);

Memo1.Lines.Add(receivedMsg);
end;