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<?php |
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namespace Simply\Application\Middleware; |
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use Psr\Container\ContainerInterface; |
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use Psr\Http\Message\ResponseFactoryInterface; |
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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\Message\StreamFactoryInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Simply\Application\Handler\MiddlewareHandler; |
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use Simply\Router\Exception\MethodNotAllowedException; |
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use Simply\Router\Exception\RouteNotFoundException; |
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use Simply\Router\Route; |
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use Simply\Router\Router; |
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/** |
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* Routing middleware that uses router to point requests to appropriate handlers. |
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* @author Riikka Kalliomäki <[email protected]> |
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* @copyright Copyright (c) 2018 Riikka Kalliomäki |
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* @license http://opensource.org/licenses/mit-license.php MIT License |
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*/ |
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class RouterMiddleware implements MiddlewareInterface |
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{ |
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/** @var ContainerInterface Container used to load handlers and additional middleware */ |
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private $container; |
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/** @var Router The router used to map requests to handlers */ |
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private $router; |
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/** @var ResponseFactoryInterface The http factory used to generate error responses */ |
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private $responseFactory; |
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/** @var StreamFactoryInterface The http factory used to generate error bodies */ |
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private $streamFactory; |
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/** |
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* RouterMiddleware constructor. |
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* @param Router $router The router used to map requests to handlers |
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* @param ContainerInterface $container Container used to load handlers and additional middleware |
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* @param ResponseFactoryInterface $responseFactory The http factory used to generate error responses |
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* @param StreamFactoryInterface $streamFactory The http factory used to generate error bodies |
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*/ |
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public function __construct( |
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Router $router, |
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ContainerInterface $container, |
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ResponseFactoryInterface $responseFactory, |
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StreamFactoryInterface $streamFactory |
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) { |
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$this->router = $router; |
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$this->container = $container; |
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$this->responseFactory = $responseFactory; |
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$this->streamFactory = $streamFactory; |
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} |
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/** {@inheritdoc} */ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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$uri = $request->getUri(); |
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$path = urldecode($uri->getPath()); |
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try { |
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$route = $this->router->route($request->getMethod(), $path); |
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} catch (MethodNotAllowedException $exception) { |
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return $this->responseFactory->createResponse(405, 'Method Not Allowed') |
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->withHeader('Allow', implode(', ', $exception->getAllowedMethods())) |
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->withHeader('Content-Type', 'text/plain; charset=utf-8') |
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->withBody($this->streamFactory->createStream('Method Not Allowed')); |
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} catch (RouteNotFoundException $exception) { |
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return $handler->handle($request); |
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} |
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if ($request->getMethod() === 'GET' && $route->getPath() !== $path) { |
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return $this->responseFactory->createResponse(302, 'Found') |
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->withHeader('Location', (string) $uri->withPath($route->getUrl())); |
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} |
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return $this->dispatch($route, $request); |
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} |
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/** |
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* Dispatches the given route for the given request. |
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* @param Route $route The route to dispatch |
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* @param ServerRequestInterface $request The request to provide for the dispatched route |
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* @return ResponseInterface The response result from the route |
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*/ |
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private function dispatch(Route $route, ServerRequestInterface $request): ResponseInterface |
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{ |
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foreach ($route->getParameters() as $name => $value) { |
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$request = $request->withAttribute($name, $value); |
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} |
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$handler = $route->getHandler(); |
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if (\is_string($handler)) { |
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return $this->getHandler($handler)->handle($request); |
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} |
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$stack = new MiddlewareHandler($this->getHandler($handler['handler'])); |
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foreach ($handler['middleware'] ?? [] as $name) { |
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$stack->push($this->getMiddleware($name)); |
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} |
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return $stack->handle($request); |
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} |
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/** |
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* Loads the request handler from the container. |
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* @param string $name The name of the dependency to load |
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* @return RequestHandlerInterface The request handler loaded from the container |
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*/ |
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private function getHandler(string $name): RequestHandlerInterface |
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{ |
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return $this->container->get($name); |
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} |
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/** |
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* Loads a middleware from the container. |
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* @param string $name The name of the dependency |
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* @return MiddlewareInterface The middleware loaded from the container |
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*/ |
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private function getMiddleware(string $name): MiddlewareInterface |
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{ |
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return $this->container->get($name); |
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} |
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} |
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simply-framework /
application
