(Delphi ActiveX) POST JSON to REST API with non-us-ascii Chars Escaped

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Note: This example requires Chilkat v11.1.0 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
success: Integer;
rest: TChilkatRest;
bAutoReconnect: Integer;
json: TChilkatJsonObject;
sb: TChilkatStringBuilder;
sbResp: TChilkatStringBuilder;

begin
success := 0;

success := 0;

rest := TChilkatRest.Create(Self);

// Connect using TLS.
bAutoReconnect := 1;
success := rest.Connect('chilkatsoft.com',443,1,bAutoReconnect);

// Load JSON containing the following Korean text.

//  {
//    "BillAddr": {
//       "Id": "239615",
//       "Line1": "류리하",
//       "Line2": "류리하류리하",
//       "City": "류리하류리하",
//       "Country": "US",
//       "CountrySubDivisionCode": "AK",
//       "PostalCode": "류리하"
//     }
// }

json := TChilkatJsonObject.Create(Self);
json.EmitCompact := 0;
success := json.LoadFile('qa_data/json/korean.json');
if (success = 0) then
  begin
    Memo1.Lines.Add(json.LastErrorText);
    Exit;
  end;

success := rest.AddHeader('Content-Type','application/json; charset=UTF-8');

sb := TChilkatStringBuilder.Create(Self);
json.EmitSb(sb.ControlInterface);
sb.Encode('unicodeescape','utf-8');

Memo1.Lines.Add(sb.GetAsString());

// The StringBuilder contains this:

// {
//   "BillAddr": {
//     "Id": "239615",
//     "Line1": "\ub958\ub9ac\ud558",
//     "Line2": "\ub958\ub9ac\ud558\ub958\ub9ac\ud558",
//     "City": "\ub958\ub9ac\ud558\ub958\ub9ac\ud558",
//     "Country": "US",
//     "CountrySubDivisionCode": "AK",
//     "PostalCode": "\ub958\ub9ac\ud558"
//   }
// }

sbResp := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestSb('POST','/echo_request_body.asp',sb.ControlInterface,sbResp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// Show the response. 
Memo1.Lines.Add('Json Response: ' + sbResp.GetAsString());
end;