symfony - Silex-我的错误处理程序不起作用

Question

我试图在 Controller 上设置错误处理程序，以捕获可能导致页面故障的所有内容。例如:在这种情况下，我试图捕获我的方法使用错误的参数调用外部API后可能发生的任何错误，但是除了给我提供典型的ClientException in Middleware.php line 69:
Client error: 400而不是我自己的代码之外，它似乎没有任何作用正是为了任何建议都将不胜感激，或者可以更好地解决Silex中的错误。

private function getSIS($url, $session, Application $app)
{
    $message = "You don't have permission to access this!";

    if($app['security']->isGranted('ROLE_SUPER_ADMIN'))
    {
        $client = new Client(['base_uri' => 'https://***********.ca/api/SIS/']);
        if (!empty($session))
            $response = $client->get($url, ['query' => 'session=' . $session]);
        else
            $response = $client->get($url);
        return $response;
    }

    $app->error(function (\Exception $e, $code) {
        switch($code) {
            case 404:
                $message = 'The requested page could not be found';
                break;
            default:
                $message = 'We are sorry, but something went terribly wrong.';
        }

        return new Response($message);
    });

    return new Response($message);
}

Answer 1

$app->error方法可能需要放置在 Controller 操作的上下文之外。我不确定您的应用程序的结构如何，但也许尝试将错误块放在$app->run();之前

$app->error(function (\Exception $e, $code) use ($app) {
    switch($code) {
        case 404:
            $message = 'The requested page could not be found';
            break;
        default:
            $message = 'We are sorry, but something went terribly wrong.';
    }

    return new Response($message, $code);
});

$app->run();