javascript - Symfony 4 和 MercureBundle

Question

我是这个平台的新用户，我正在尝试按照文档将 Mercure 集成到 Symfony：https ://symfony.com/blog/symfony-gets-real-time-push-capabilities 。一旦控制台中的所有步骤都遵循 chrome 对 Publisher 类的响应，就会生成错误：

净 :: ERR_ABORTED 406。

你能帮我理解如何使这个捆绑包工作吗？

namespace App\Controller;

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Mercure\Publisher;
use Symfony\Component\Mercure\Update;

class PublishController
{
    public function __invoke(Publisher $publisher)
    {
        $update = new Update(
            'http://example.com/books/1',
            json_encode(['status' => 'OutOfStock'])
        );


        // The Publisher service is an invokable object
        $publisher($update);
    }
}

const es = new EventSource('https://www.davidecpr.online/hub?topic=' + encodeURIComponent('http://example.com/books/1'));
            es.onmessage = e => {
                // Will be called every time an update is published by the server
                console.log(JSON.parse(e.data));
            };

.env 变量设置如下： 'MERCURE_PUBLISH_URL' => ' http://www.davidecpr.online:3000/hub '