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Pascal (Lazarus/Delphi)

Get the JWS Payload as a String

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.GetPayload, which returns the payload of a loaded JWS as text, decoded using the given charset.

Background. In practice, validate the signature before trusting the payload. Getting the payload retrieves the signed content.

Chilkat Pascal (Lazarus/Delphi) Downloads

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.Jws;

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

procedure RunDemo;
var
  success: Boolean;
  jws: TJws;
  jwsCompact: string;
  payload: string;

begin
  success := False;

  jws := TJws.Create;

  //  Load the JWS compact serialization.
  jwsCompact := 'eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>';
  success := jws.LoadJws(jwsCompact);
  if (success = False) then
    begin
      WriteLn(jws.LastErrorText);
      Exit;
    end;

  //  Return the JWS payload as text, decoded using the given charset.
  payload := jws.GetPayload('utf-8');
  if (jws.LastMethodSuccess = False) then
    begin
      WriteLn(jws.LastErrorText);
      Exit;
    end;
  WriteLn(payload);


  jws.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.