php - 在根处捕获异常

Question

我正在学习 Symfony5，我想知道是否有可能在路由执行后捕获异常。
主要思想是在我的 route 摆脱一些反复出现的 try-catch 代码块:

    public function getStudentMean(int $studentId): Response
    {
        try {
            $mean = $this->gradedStudentService->getMean($studentId);
            return new Response($mean, Response::HTTP_OK);
        } catch (AbstractApiException $e) {
            return $this->returnBadRequestResponse($e->getMessage());
        }
    }

    public function deleteStudent(int $id): Response
    {
        try {
            $this->studentService->deleteStudent($id);
            return new Response('', Response::HTTP_NO_CONTENT);
        } catch (AbstractApiException $e) {
            return $this->returnBadRequestResponse($e->getMessage());
        }
    }

我是否必须编辑我的 public\index.php文件在这里捕获异常？还有另一种更清洁的方法吗？
谢谢!

Answer 1

是的，Symfony 已经为此提供了一个集成的解决方案，事实上，Symfony 在根目录下捕获每个异常并让您管理它们。
您可以找到信息here .
怎么做
一、编辑config/packages/framework.yaml并设置一个 Controller 来管理所有异常(属性 error_controller )。

framework:
    secret: '%env(APP_SECRET)%'
    #csrf_protection: true
    #http_method_override: true

    # Enables session support. Note that the session will ONLY be started if you read or write from it.
    # Remove or comment this section to explicitly disable session support.
    session:
        handler_id: null
        cookie_secure: auto
        cookie_samesite: lax

    #esi: true
    #fragments: true
    php_errors:
        log: true

    error_controller: App\Controller\ErrorController::showAction

当抛出异常时，该 Controller 将获取初始请求和抛出的异常作为输入。这是一个例子:

<?php
namespace App\Controller;

use App\Exceptions\ExpiredLinkException;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\HttpException;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Throwable;

/**
 * Controller for exceptions
 */
class ErrorController extends AbstractCustomController
{

    /**
     * @param Request $request
     * @param Throwable $exception
     * @return Mixed
     * @throws Throwable
     */
    public function showAction(Request $request, Throwable $exception)
    {
        if ($exception instanceof HttpException) {
            if ($exception->getStatusCode() == Response::HTTP_UNAUTHORIZED) {
                return new RedirectResponse($_ENV['WEBSITE_BASE_URL'] . 'login?source=' . urlencode($request->getUri()));
            }
        }
        if ($exception instanceof ExpiredLinkException) {
            return $this->render('error/expired.html.twig');
        }
        if ($_ENV["APP_ENV"] == "prod") {
            if ($exception instanceof HttpException) {
                if ($exception->getStatusCode() == Response::HTTP_FORBIDDEN) {
                    return $this->render('error/403.html.twig');
                }
                if ($exception->getStatusCode() == Response::HTTP_NOT_FOUND) {
                    return $this->render('error/404.html.twig');
                }
            }
            return $this->render('error/500.html.twig');
        }
        throw $exception;
    }
}