4

我正在从 Slim/3 迁移到 Slim/4。除了404 Not Found Handler(现在已经消失的一部分)之外,我已经找到或找到了我正在使用的所有已删除功能的替代品App::$settings

SlimApp::$settings已被删除,已实施多个中间件来替换每个单独设置的功能。

有中间件notFoundHandler吗?如果没有,我该如何实施?

我的曾经是这样的:

use Slim\Container;
$config = new Container(); 
$config['notFoundHandler'] = function (Container $c) {
    return function (Request $request, Response $response) use ($c): Response {
        $page = new Alvaro\Pages\Error($c);
        return $page->notFound404($request, $response);
    };
};
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1 回答 1

10

根据关于错误处理的 Slim 4 文档

每个 Slim Framework 应用程序都有一个错误处理程序,用于接收所有未捕获的 PHP 异常

您可以设置自定义错误处理程序来处理引发的每种类型的异常。同一页面上提供了预定义异常类的列表。

这是一个非常基本的示例,说明如何将闭包注册为错误处理程序,以仅处理HttpNotFoundException异常。您还可以将处理程序放在扩展的类中Slim\Handlers\ErrorHandler。另外,我实际上并没有使用您Alvaro\Pages\Error来生成响应,但是更改它应该很简单:

<?php

require '../vendor/autoload.php';

$app = Slim\Factory\AppFactory::create();

// Define Custom Error Handler
$customErrorHandler = function (
    Psr\Http\Message\ServerRequestInterface $request,
    \Throwable $exception,
    bool $displayErrorDetails,
    bool $logErrors,
    bool $logErrorDetails
) use ($app) {
    $response = $app->getResponseFactory()->createResponse();
    // seems the followin can be replaced by your custom response
    // $page = new Alvaro\Pages\Error($c);
    // return $page->notFound404($request, $response);
    $response->getBody()->write('not found');
    return $response->withStatus(404);
};

// Add Error Middleware
$errorMiddleware = $app->addErrorMiddleware(true, true, true);
// Register the handler to handle only  HttpNotFoundException
// Changing the first parameter registers the error handler for other types of exceptions
$errorMiddleware->setErrorHandler(Slim\Exception\HttpNotFoundException::class, $customErrorHandler);


$app->get('/', function ($request, $response) {
    $response->getBody()->write('Hello Slim 4');
    return $response;
});

$app->run();

另一种方法是创建一个通用错误处理程序并将其注册为默认处理程序,并在该处理程序内部根据抛出的异常类型决定应发送什么响应。就像是:

$customErrorHandler = function (
    Psr\Http\Message\ServerRequestInterface $request,
    \Throwable $exception,
    bool $displayErrorDetails,
    bool $logErrors,
    bool $logErrorDetails
) use ($app) {
    $response = $app->getResponseFactory()->createResponse();

        if ($exception instanceof HttpNotFoundException) {
            $message = 'not found';
            $code = 404;
        } elseif ($exception instanceof HttpMethodNotAllowedException) {
            $message = 'not allowed';
            $code = 403;
        }
        // ...other status codes, messages, or generally other responses for other types of exceptions

    $response->getBody()->write($message);
    return $response->withStatus($code);
};

然后您可以将其设置为默认错误处理程序:

$errorMiddleware = $app->addErrorMiddleware(true, true, true);
$errorMiddleware->setDefaultErrorHandler($customErrorHandler);
于 2019-08-25T18:56:02.347 回答