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上一节课咱们封装了对立响应的办法,敲过一遍代码的小伙伴可能会发现一个显著的问题,对于业务逻辑的解决,咱们往往会写在 Service 中,比方像上面这样:
App\Service\IndexService (自行创立)如下:
<?phpdeclare(strict_types=1);namespace App\Service;class IndexService{ public function info(int $id) { if ($id <= 0) { throw new \Exception("id有效"); } return ['info' => 'data info']; }}
这个时候就须要咱们在 IndexController::info 办法内通过 try/catch 捕捉解决了,如下:
use App\Service\IndexService;use Hyperf\Di\Annotation\Inject;use Hyperf\HttpServer\Annotation\AutoController;#[AutoController]class IndexController extends AbstractController{ /** * @var IndexService */ #[Inject] public $indexService; public function info() { try { return $this->response->success($this->indexService->info($id)); } catch (\Throwable $e) { return $this->response->fail(500, $e->getMessage()); } }}
其中,IndexService 是通过#[Inject]
注解注入由@var
注解申明的属性类型对象。依赖注入参考 [https://hyperf.wiki/3.0/#/zh-...
](https://hyperf.wiki/3.0/#/zh-...)
这样看似解决了被动抛异样的问题,然而也带来了新的问题,比方每个办法都要用 try/catch 捕捉,无疑减少了很多麻烦。
hyperf 提供了异样处理器(ExceptionHandler),专门解决业务流程中没有捕捉的异样。
异样处理器须要在 config/autoload/exceptions.php 文件内配置。hyperf 框架默认配置了两个 ErrorHandle,如下:
return [ 'handler' => [ 'http' => [ Hyperf\HttpServer\Exception\Handler\HttpExceptionHandler::class, App\Exception\Handler\AppExceptionHandler::class, ], ],];
咱们找到 Hyperf\HttpServer\Exception\Handler\HttpExceptionHandler 的 isValid 办法,会发现它针对的是 Hyperf\HttpMessage\Exception\HttpException 的异样解决。
public function isValid(Throwable $throwable): bool{ return $throwable instanceof HttpException;}
解决的形式(参考 Hyperf\HttpServer\Exception\Handler\HttpExceptionHandler::handle)也很简略,看上面3行代码
public function handle(Throwable $throwable, ResponseInterface $response){ // ① $this->logger->debug($this->formatter->format($throwable)); // ② $this->stopPropagation(); // ③ return $response->withStatus($throwable->getStatusCode())->withBody(new SwooleStream($throwable->getMessage()));}
- ①、控制台输入异样信息
- ②、异样解决到此为止,不再持续冒泡传递
- ③、http 间接响应 http 状态码并输入异样信息
curl 申请一个不存在的路由测试一下
➜ ~ curl -I http://127.0.0.1:9501/index/info222HTTP/1.1 404 Not FoundServer: swoole-http-serverConnection: keep-aliveContent-Type: text/htmlDate: Tue, 01 Nov 2022 08:40:10 GMT
Hyperf\HttpServer\Exception\Handler\HttpExceptionHandler 是 hyperf 的源码文件,咱们不好批改,先间接屏蔽掉,等下在 AppExceptionHandler 内对立解决。
当初咱们只保留了一个 App\Exception\Handler,看下 AppExceptionHandler::handle 办法,也是向控制台输入错误信息、异样栈,并输入 Internal Server Error。这对咱们也没什么意义,改写 AppExceptionHandler 之前,先创立一个业务异样类,后续被动抛异样次要应用这个类即可。
app/Exception 目录新增 BusinessException,继承 Hyperf\Server\Exception\ServerException,代码如下:
<?phpdeclare(strict_types=1);namespace App\Exception;use Hyperf\Server\Exception\ServerException;class BusinessException extends ServerException{}
AppExceptionHandler 目前为止,咱们须要针对 App\Exception\BusinessException、Hyperf\HttpMessage\Exception\HttpException 独自捕捉并解决,如下:
<?phpdeclare(strict_types=1);namespace App\Exception\Handler;use App\Components\Response;use App\Exception\BusinessException;use Hyperf\ExceptionHandler\ExceptionHandler;use Hyperf\ExceptionHandler\Formatter\FormatterInterface;use Hyperf\HttpMessage\Exception\HttpException;use Hyperf\Logger\LoggerFactory;use Hyperf\Utils\ApplicationContext;use Psr\Container\ContainerInterface;use Psr\Http\Message\ResponseInterface;use Throwable;class AppExceptionHandler extends ExceptionHandler{ protected $logger; /** * @var Response */ protected $response; public function __construct(ContainerInterface $container, Response $response) { $this->logger = $container->get(LoggerFactory::class)->get('exception'); $this->response = $response; } public function handle(Throwable $throwable, ResponseInterface $response) { $formatter = ApplicationContext::getContainer()->get(FormatterInterface::class); // 业务异样类 if ($throwable instanceof BusinessException) { return $this->response->fail($throwable->getCode(), $throwable->getMessage()); } // HttpException if ($throwable instanceof HttpException) { return $this->response->fail($throwable->getStatusCode(), $throwable->getMessage()); } $this->logger->error($formatter->format($throwable)); return $this->response->fail(500, env('APP_ENV') == 'dev' ? $throwable->getMessage() : 'Server Error'); } public function isValid(Throwable $throwable): bool { return true; }}
isValid 办法返回 true,示意接管所有异样并解决,在解决办法 handle 中,除了 App\Exception\BusinessException、Hyperf\HttpMessage\Exception\HttpException 异样,其余均通过 App\Components\Response::fail 办法解决并把所有异样记录到日志文件。
当初 IndexController::info 办法改写回来如下:
public function info(){ $id = (int) $this->request->input('id', 0); return $this->response->success($this->indexService->info($id));}
IndexService::info 改写如下:
use App\Exception\BusinessException;class IndexService{ public function info(int $id) { if ($id <= 0) { throw new BusinessException("id有效"); } return ['info' => 'data info']; }}
curl测试下:
➜ ~ curl http://127.0.0.1:9501/index/info?id=0{"code":500,"message":"id有效"}%➜ ~ curl http://127.0.0.1:9501/index/info222{"code":404,"message":"Not Found"}%
到这里,咱们的框架曾经初现雏形了,但咱们的论坛筹备面向全世界的用户,像下面这样抛出一个“id有效”,老外还认为是乱码了。
下一节咱们让框架反对国际化。