(Delphi ActiveX) Transition from Http.PostJson3 to Http.HttpJson

Provides instructions for replacing deprecated PostJson3 method calls with HttpJson.

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;
contentType: WideString;
json: TChilkatJsonObject;
responseObj: IChilkatHttpResponse;
responseOut: TChilkatHttpResponse;
success: Integer;

begin
http := TChilkatHttp.Create(Self);

url := 'https://example.com/something';
contentType := 'application/json';
json := TChilkatJsonObject.Create(Self);
json.LoadFile('C:/temp/requestBody.json');

// ------------------------------------------------------------------------
// The PostJson3 method is deprecated:

responseObj := http.PostJson3(url,contentType,json.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// ...
// ...

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

responseOut := TChilkatHttpResponse.Create(Self);
success := http.HttpJson('POST',url,json.ControlInterface,contentType,responseOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;
end;