Pascal (Lazarus/Delphi)

Socket/SSL/TLS through SOCKS5 / SOCKS4 Proxy

See more Socket/SSL/TLS Examples

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

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Socket;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  socket: TSocket;
  hostname: string;
  ssl: Boolean;
  maxWaitMillisec: Integer;
  receivedMsg: string;

begin
  success := False;

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

  socket := TSocket.Create;

  //  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 := False;
  maxWaitMillisec := 20000;
  success := socket.Connect(hostname,5555,ssl,maxWaitMillisec);
  if (success <> True) then
    begin
      WriteLn(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 <> True) then
    begin
      WriteLn(socket.LastErrorText);
      Exit;
    end;

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

  WriteLn(receivedMsg);


  socket.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.