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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
url: PWideChar;
resp1: HCkHttpResponse;
resp2: HCkHttpResponse;
success: Boolean;

begin
http := CkHttp_Create();
url := 'https://www.example.com/';

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

resp1 := CkHttp_GetHead(http,url);
if (CkHttp_getLastMethodSuccess(http) = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;
Memo1.Lines.Add(IntToStr(CkHttpResponse_getStatusCode(resp1)));
CkHttpResponse_Dispose(resp1);

// ------------------------------------------------------------------------
// 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 := CkHttpResponse_Create();
success := CkHttp_HttpNoBody(http,'HEAD',url,resp2);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;
Memo1.Lines.Add(IntToStr(CkHttpResponse_getStatusCode(resp2)));

CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp2);

end;