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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Yii\Http; |
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use Psr\EventDispatcher\EventDispatcherInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Yiisoft\Middleware\Dispatcher\MiddlewareDispatcher; |
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use Yiisoft\Yii\Http\Event\AfterEmit; |
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use Yiisoft\Yii\Http\Event\AfterRequest; |
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use Yiisoft\Yii\Http\Event\ApplicationShutdown; |
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use Yiisoft\Yii\Http\Event\ApplicationStartup; |
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use Yiisoft\Yii\Http\Event\BeforeRequest; |
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/** |
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* Application is the entry point for an HTTP application. |
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* |
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* For more details and usage information on Application, see the guide article on applications: |
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* |
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* @link https://github.com/yiisoft/docs/blob/master/guide/en/structure/application.md |
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*/ |
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final class Application |
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{ |
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/** |
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* @param MiddlewareDispatcher $dispatcher The middleware dispatcher instance. |
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* @param EventDispatcherInterface $eventDispatcher The event dispatcher instance. |
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* @param RequestHandlerInterface $fallbackHandler The fallback handler that will be called |
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* if no response was returned during request handling. |
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*/ |
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public function __construct(private MiddlewareDispatcher $dispatcher, private EventDispatcherInterface $eventDispatcher, private RequestHandlerInterface $fallbackHandler) |
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{ |
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} |
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/** |
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* Dispatches an event {@see ApplicationStartup} to all relevant listeners for processing. |
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*/ |
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public function start(): void |
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{ |
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$this->eventDispatcher->dispatch(new ApplicationStartup()); |
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} |
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/** |
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* Dispatches an event {@see ApplicationShutdown} to all relevant listeners for processing. |
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*/ |
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public function shutdown(): void |
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{ |
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$this->eventDispatcher->dispatch(new ApplicationShutdown()); |
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} |
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/** |
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* Dispatches an event {@see AfterEmit} to all relevant listeners for processing. |
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* |
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* @param ResponseInterface|null $response Response instance or null if response generation failed due to an error. |
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*/ |
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public function afterEmit(?ResponseInterface $response): void |
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{ |
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$this->eventDispatcher->dispatch(new AfterEmit($response)); |
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} |
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/** |
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* Handles a request by passing it through the middleware stack {@see MiddlewareDispatcher} and returns a response. |
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* |
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* Dispatches {@see BeforeRequest} and {@see AfterRequest} events to all relevant listeners for processing. |
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* |
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* @param ServerRequestInterface $request The request instance to handle. |
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* |
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* @return ResponseInterface The resulting instance of the response. |
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*/ |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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$this->eventDispatcher->dispatch(new BeforeRequest($request)); |
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try { |
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return $response = $this->dispatcher->dispatch($request, $this->fallbackHandler); |
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} finally { |
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$this->eventDispatcher->dispatch(new AfterRequest($response ?? null)); |
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} |
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} |
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} |
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yiisoft /
yii-http
