HTTP SOCKS5 and SOCKS4 Proxy Support

Demonstrates how to use SOCKS5 and SOCKS4 proxies with HTTP.

Download Chilkat HTTP ActiveX

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATHTTPLib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
success: Integer;

begin
http := TChilkatHttp.Create(Self);

//  Any string unlocks the component for the 1st 30-days.
success := http.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage(http.LastErrorText);
    Exit;
  end;

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

//  Download the Python language install.
//  Note: This URL may have changed since this example was created.
success := http.Download('http://www.python.org/ftp/python/2.5/python-2.5.msi','python-2.5.msi');
if (success <> 1) then
  begin
    ShowMessage(http.LastErrorText);
  end
else
  begin
    ShowMessage('Python Download Complete!');
  end;
end;