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<?php |
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/* |
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* This file is part of the jade/jade package. |
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* |
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* (c) Slince <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Jade\HttpKernel; |
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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 Jade\HttpKernel\Event\FilterControllerEvent; |
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use Jade\HttpKernel\Event\FilterResponseEvent; |
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use Jade\HttpKernel\Event\GetResponseEvent; |
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use Jade\HttpKernel\Event\PostResponseEvent; |
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use Symfony\Component\EventDispatcher\EventDispatcherInterface; |
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use Zend\HttpHandlerRunner\Emitter\EmitterInterface; |
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use Zend\Stratigility\MiddlewarePipeInterface; |
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final class HttpKernel implements RequestHandlerInterface |
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{ |
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/** |
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* @var EventDispatcherInterface |
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*/ |
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protected $eventDispatcher; |
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/** |
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* @var MiddlewarePipeInterface |
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*/ |
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protected $pipeline; |
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/** |
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* @var ControllerResolverInterface |
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*/ |
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protected $controllerResolver; |
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/** |
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* @var ArgumentResolverInterface |
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*/ |
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protected $argumentResolver; |
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/** |
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* @var EmitterInterface |
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*/ |
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protected $emitter; |
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public function __construct( |
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EventDispatcherInterface $eventDispatcher, |
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ControllerResolverInterface $controllerResolver, |
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ArgumentResolverInterface $argumentResolver, |
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MiddlewarePipeInterface $pipeline, |
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EmitterInterface $emitter |
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){ |
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$this->eventDispatcher = $eventDispatcher; |
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$this->controllerResolver = $controllerResolver; |
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$this->argumentResolver = $argumentResolver; |
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$this->pipeline = $pipeline; |
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$this->emitter = $emitter; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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// 1. 触发事件 |
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$event = new GetResponseEvent($this, $request); |
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$this->eventDispatcher->dispatch($event, KernelEvents::REQUEST); |
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// 2. 调度middleware |
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return $this->pipeline->process($event->getRequest(), new CallableRequestHandler([$this, 'handleRequest'])); |
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} |
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/** |
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* Emit response. |
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* |
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* @param ServerRequestInterface $request |
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* @param ResponseInterface $response |
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*/ |
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public function terminate(ServerRequestInterface $request, ResponseInterface $response) |
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{ |
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$event = new PostResponseEvent($this, $request, $response); |
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$this->eventDispatcher->dispatch($event, KernelEvents::TERMINATE); |
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$this->emitter->emit($response); |
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} |
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/** |
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* 处理请求 |
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* |
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* @param ServerRequestInterface $request |
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* @return ResponseInterface |
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*/ |
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public function handleRequest(ServerRequestInterface $request): ?ResponseInterface |
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{ |
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// 1. middleware 到达结束 |
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$event = new GetResponseEvent($this, $request); |
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$this->eventDispatcher->dispatch($event, KernelEvents::MIDDLEWARE); |
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$request = $event->getRequest(); |
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if ($event->hasResponse()) { |
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return $this->filterResponse($event->getResponse(), $request); |
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} |
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// 2. 获取控制器 |
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$controller = $this->controllerResolver->getController($request); |
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$event = new FilterControllerEvent($this, $request, $controller); |
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$this->eventDispatcher->dispatch($event, KernelEvents::CONTROLLER); |
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$controller = $event->getController(); |
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$response = call_user_func_array($controller, |
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$this->argumentResolver->getArguments($request, $controller) |
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); |
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// 3. 过滤响应体 |
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return $this->filterResponse($response, $request); |
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} |
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protected function filterResponse(ResponseInterface $response, ServerRequestInterface $request) |
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{ |
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$event = new FilterResponseEvent($this, $request, $response); |
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$this->eventDispatcher->dispatch($event, KernelEvents::RESPONSE); |
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return $event->getResponse(); |
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} |
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} |
jadephp /
jade
