Pascal (Lazarus/Delphi)

Delete a Google Calendar Event

See more Google Calendar Examples

Demonstrates how to delete a Google Calendar event. 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.Http,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  jsonToken: TJsonObject;
  http: THttp;
  url: string;
  resp: THttpResponse;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  //  This example uses a previously obtained access token having permission for the 
  //  Google Calendar scope.

  //  In this example, Get Google Calendar OAuth2 Access Token, the access
  //  token was saved to a JSON file.  This example fetches the access token from the file..
  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/googleCalendar.json');
  if (jsonToken.HasMember('access_token') = False) then
    begin
      WriteLn('No access token found.');
      Exit;
    end;
  http := THttp.Create;
  http.AuthToken := jsonToken.StringOf('access_token');

  //  Your URL should use the actual calendar ID and the actual event ID for the event to be deleted.
  url := 'https://www.googleapis.com/calendar/v3/calendars/your_calendar_id/events/your_event_id';

  resp := THttpResponse.Create;
  success := http.HttpNoBody('DELETE',url,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  if (resp.StatusCode = 204) then
    begin
      //  Success.
      WriteLn('Event deleted');
    end
  else
    begin
      if (resp.StatusCode = 401) then
        begin
          WriteLn('Try refreshing the access token and then retry...');
        end;

      //  Failed. 
      WriteLn(resp.BodyStr);
    end;


  jsonToken.Free;
  http.Free;
  resp.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.