Pascal (Lazarus/Delphi)

POST JSON to REST API with non-us-ascii Chars Escaped

See more REST Examples

Demonstrates how to POST to a REST API with non-usascii chars within JSON Unicode escaped. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.StringBuilder,
  Chilkat.Rest,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bAutoReconnect: Boolean;
  json: TJsonObject;
  sb: TStringBuilder;
  sbResp: TStringBuilder;

begin
  success := False;

  success := False;

  rest := TRest.Create;

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

  //  Load JSON containing the following Korean text.

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

  json := TJsonObject.Create;
  json.EmitCompact := False;
  success := json.LoadFile('qa_data/json/korean.json');
  if (success = False) then
    begin
      WriteLn(json.LastErrorText);
      Exit;
    end;

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

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

  WriteLn(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 := TStringBuilder.Create;
  success := rest.FullRequestSb('POST','/echo_request_body.asp',sb,sbResp);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  Show the response. 
  WriteLn('Json Response: ' + sbResp.GetAsString());


  rest.Free;
  json.Free;
  sb.Free;
  sbResp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.