(Delphi ActiveX) HTTPS Requests over Squid Proxy Direct TLS Connection

Demonstrates how to send HTTP requests through an HTTP proxy that supports Direct TLS Connections. (Chilkat tests with a squid 4.11 proxy.)

A direct TLS connection to an HTTP proxy is where the initial connection to the proxy server is TLS.

Note: This example requires Chilkat v9.5.0.83 or greater.

For more information, see https://wiki.squid-cache.org/Features/HTTPS#Direct_TLS_connection

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
http: TChilkatHttp;
s: WideString;

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

http := TChilkatHttp.Create(Self);

// Set the HTTP proxy domain or IP address.
http.ProxyDomain := '172.16.16.46';
// The proxy port..
http.ProxyPort := 3128;

// Indicate that we are to use a direct TLS connection with the HTTP proxy
// (we use a Squid Cache: Version 4.11 for testing)
http.ProxyDirectTls := 1;

// If the proxy requires a login or password, we can set it here.
// Otherwise comment out these lines.
http.ProxyLogin := 'myProxyLogin';
http.ProxyPassword := 'myProxyPassword';

// All requests sent on the http object will now go through the proxy.
// Give it a test:
s := http.QuickGetStr('https://www.chilkatsoft.com/helloWorld.html');
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// The LastErrorText property also contains information when method call succeeds.
// Have a look to see that the request was sent through the proxy:
Memo1.Lines.Add(http.LastErrorText);

Memo1.Lines.Add('---');
Memo1.Lines.Add(s);
Memo1.Lines.Add('---');
Memo1.Lines.Add('Success for TLS destination over direct TLS HTTP proxy.');
end;