(Delphi ActiveX) Load JSON Object from HTTP Response Body

Demonstrates how to load the HTTP response body directly into a JSON object.

Note: This example requires Chilkat v9.5.0.89 or greater because it uses the GetBodyJson method. Prior to v9.5.0.89, and application would need to first copy the HTTP response body to a Chilkat StringBuilder object by calling GetBodySb, and then load the JSON object by calling LoadSb.

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;
success: Integer;
resp: IChilkatHttpResponse;
json: TChilkatJsonObject;

begin
http := TChilkatHttp.Create(Self);

resp := http.PText('GET','https://www.chilkatsoft.com/exampledata/sample.json','','','',0,0);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// A JSON object is JSON that begins with "{" and ends with "}"
json := TChilkatJsonObject.Create(Self);

// If we wish to transfer (instead of copy) the JSON from the HttpResponse to the JsonObject, then add the keyword "TakeResponseBody" to UncommonOptions
// This could save memory for extremely large JSON responses.
resp.UncommonOptions := 'TakeResponseBody';

resp.GetBodyJson(json.ControlInterface);

json.EmitCompact := 0;
Memo1.Lines.Add(json.Emit());

// Note: If UncommonOptions contained "TakeResponseBody", then the response BodyStr will now be empty:
Memo1.Lines.Add('----');
Memo1.Lines.Add(resp.BodyStr);
end;