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Merge pull request #26 from minxinqing/fix/exception-handler

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异常处理器文档更新
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黄朝晖 2019-06-26 17:05:37 +08:00 committed by GitHub
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1 changed files with 15 additions and 9 deletions
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24
zh/exception-handler.md
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@ -18,7 +18,7 @@ return [
'http' => [ 'http' => [
// 这里配置完整的类命名空间地址已完成对该异常处理器的注册 // 这里配置完整的类命名空间地址已完成对该异常处理器的注册
\App\Exception\Handler\FooExceptionHandler::class, \App\Exception\Handler\FooExceptionHandler::class,
\App\Exception\Handler\BusinessExceptionHandler::class, \App\Exception\Handler\AppExceptionHandler::class,
], ],
], ],
]; ];
@ -37,25 +37,31 @@ namespace App\Exception\Handler;
use Hyperf\ExceptionHandler\ExceptionHandler; use Hyperf\ExceptionHandler\ExceptionHandler;
use Hyperf\HttpMessage\Stream\SwooleStream; use Hyperf\HttpMessage\Stream\SwooleStream;
use Psr\Http\Message\ResponseInterface; use Psr\Http\Message\ResponseInterface;
use App\Exception\BusinessException; use App\Exception\FooException;
use Throwable; use Throwable;
class BusinessExceptionHandler extends ExceptionHandler class FooExceptionHandler extends ExceptionHandler
{ {
public function handle(Throwable $throwable, ResponseInterface $response) public function handle(Throwable $throwable, ResponseInterface $response)
{ {
// 判断被捕获到的异常是希望被捕获的异常 // 判断被捕获到的异常是希望被捕获的异常
if ($throwable instanceof BusinessException) { if ($throwable instanceof FooException) {
// 格式化输出 // 格式化输出
$data = json_encode([ $data = json_encode([
'code' => $throwable->getCode(), 'code' => $throwable->getCode(),
'message' => $throwable->getMessage(), 'message' => $throwable->getMessage(),
], JSON_UNESCAPED_UNICODE); ], JSON_UNESCAPED_UNICODE);
// 阻止异常冒泡
$this->stopPropagation();
return $response->withStatus(500)->withBody(new SwooleStream($data)); return $response->withStatus(500)->withBody(new SwooleStream($data));
} }
// 系统内部异常或者是不能暴露到外网的异常 // 交给下一个异常处理器
return $response->withStatus(500)->withBody('Server Error'); return $respose;
// 或者直接屏蔽异常
// return $response->withStatus(500)->withBody('Server Error');
} }
public function isValid(Throwable $throwable): bool public function isValid(Throwable $throwable): bool
@ -75,7 +81,7 @@ use App\Constants\ErrorCode;
use Hyperf\Server\Exception\ServerException; use Hyperf\Server\Exception\ServerException;
use Throwable; use Throwable;
class BusinessException extends ServerException class FooException extends ServerException
{ {
public function __construct(string $message = null, int $code = 0, Throwable $previous = null) public function __construct(string $message = null, int $code = 0, Throwable $previous = null)
{ {
@ -96,9 +102,9 @@ class IndexController extends Controller
{ {
public function index() public function index()
{ {
throw new BusinessException('Business Exception...', 800); throw new FooException('Foo Exception...', 800);
} }
} }
``` ```
在上面这个例子，我们先假设 `FooException` 是存在的一个异常，以及假设已经完成了该处理器的配置，那么当业务抛出一个没有被捕获处理的异常时，就会根据配置的顺序依次传递，整一个处理流程可以理解为一个管道，若前一个异常处理器存在返回值则不再往后传递，若最后一个配置的异常处理器仍不对该异常进行捕获处理，那么就会交由 Hyperf 的默认异常处理器处理了。 在上面这个例子，我们先假设 `FooException` 是存在的一个异常，以及假设已经完成了该处理器的配置，那么当业务抛出一个没有被捕获处理的异常时，就会根据配置的顺序依次传递，整一个处理流程可以理解为一个管道，若前一个异常处理器调用 `$this->stopPropagation()` 则不再往后传递，若最后一个配置的异常处理器仍不对该异常进行捕获处理，那么就会交由 Hyperf 的默认异常处理器处理了。