Server sent events with Laravel

gistfile1.txt

Using nginx version: nginx/1.6.2 and Laravel 5

In the controller:
        use Symfony\Component\HttpFoundation\StreamedResponse;
        - - - - - - Some method  - - - - - - - - - 
        $response = new StreamedResponse();
        $response->headers->set('Content-Type', 'text/event-stream');
        $response->headers->set('Cache-Control', 'no-cache');
        $response->setCallback(
            function() {
                    echo "retry: 100\n\n"; // no retry would default to 3 seconds.
                    echo "data: Hello There\n\n";
                    ob_flush();
                    flush();
            });
        $response->send();
        

In the page:

    <script type="text/javascript">
      var es = new EventSource("<?php echo action('Controller@Action'); ?>");
  
      es.onmessage = function(e) {
          console.log(e);
      }
    </script>