(Delphi ActiveX) Transition from Http.GetHead to Http.HttpNoBody

Provides instructions for replacing deprecated GetHead method calls with HttpNoBody.

Note: This example requires Chilkat v11.0.0 or greater.

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;
url: WideString;
resp1: IChilkatHttpResponse;
resp2: TChilkatHttpResponse;
success: Integer;

begin
http := TChilkatHttp.Create(Self);
url := 'https://www.example.com/';

// ------------------------------------------------------------------------
// The GetHead method is deprecated:

resp1 := http.GetHead(url);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add(IntToStr(resp1.StatusCode));

// ------------------------------------------------------------------------
// Do the equivalent using HttpNoBody.
// Your application creates a new, empty response object which is passed 
// in the last argument and filled with the HTTP response upon success.

resp2 := TChilkatHttpResponse.Create(Self);
success := http.HttpNoBody('HEAD',url,resp2.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add(IntToStr(resp2.StatusCode));
end;