Send a REST Request using StringBuilder Bodies

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Demonstrates Rest.FullRequestSb, which sends a complete request whose text body is read from a StringBuilder and stores the text response body in a second StringBuilder.

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.Rest,
  Chilkat.StringBuilder;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  bAutoReconnect: Boolean;
  sbRequest: TStringBuilder;
  sbResponse: TStringBuilder;
  responseText: string;

begin
  success := False;

  rest := TRest.Create;
  bTls := True;
  bAutoReconnect := True;
  success := rest.Connect('example.com',443,bTls,bAutoReconnect);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  FullRequestSb sends a request whose text body is read from a StringBuilder and stores the text
  //  response body in a second StringBuilder.  This avoids extra string conversions for large bodies.
  sbRequest := TStringBuilder.Create;
  sbRequest.Append('{ "query": "chilkat" }');

  rest.AddHeader('Content-Type','application/json');

  sbResponse := TStringBuilder.Create;
  success := rest.FullRequestSb('POST','/api/search',sbRequest,sbResponse);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  responseText := sbResponse.GetAsString();
  if (sbResponse.LastMethodSuccess = False) then
    begin
      WriteLn(sbResponse.LastErrorText);
      Exit;
    end;
  WriteLn(responseText);


  rest.Free;
  sbRequest.Free;
  sbResponse.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.