Pascal (Lazarus/Delphi)

WhatsApp Cloud API Send Message

See more WhatsApp Examples

Demonstrates how to send a message using the WhatsApp Cloud API (Business App) 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;
  http: THttp;
  json: TJsonObject;
  resp: THttpResponse;

begin
  success := False;

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

  http := THttp.Create;

  //  The following JSON is sent in the request body.

  //  {
  //    "messaging_product": "whatsapp",
  //    "to": "16302581871",
  //    "type": "template",
  //    "template": {
  //      "name": "hello_world",
  //      "language": {
  //        "code": "en_US"
  //      }
  //    }
  //  }

  json := TJsonObject.Create;
  json.UpdateString('messaging_product','whatsapp');
  json.UpdateString('to','15555555555');
  json.UpdateString('type','template');
  json.UpdateString('template.name','hello_world');
  json.UpdateString('template.language.code','en_US');

  http.AuthToken := 'EAANrS5....yFB9Ma';
  http.SetRequestHeader('Content-Type','application/json');

  resp := THttpResponse.Create;
  success := http.HttpJson('POST','https://graph.facebook.com/v18.0/111111111111111/messages',json,'application/json',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  WriteLn(resp.StatusCode);
  WriteLn(resp.BodyStr);

  //  Here's a screenshot of our WhatsApp test app.

  //  


  http.Free;
  json.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.