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<?php |
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declare(strict_types=1); |
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namespace League\Route; |
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use FastRoute\Dispatcher as FastRoute; |
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use FastRoute\Dispatcher\GroupCountBased as GroupCountBasedDispatcher; |
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use League\Route\Http\Exception\{MethodNotAllowedException, NotFoundException}; |
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use League\Route\Middleware\{MiddlewareAwareInterface, MiddlewareAwareTrait}; |
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use League\Route\Strategy\{StrategyAwareInterface, StrategyAwareTrait, StrategyInterface}; |
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use Psr\Http\Message\{ResponseInterface, ServerRequestInterface}; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use RuntimeException; |
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class Dispatcher extends GroupCountBasedDispatcher implements |
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MiddlewareAwareInterface, |
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RequestHandlerInterface, |
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StrategyAwareInterface |
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{ |
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use MiddlewareAwareTrait; |
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use StrategyAwareTrait; |
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public function dispatchRequest(ServerRequestInterface $request): ResponseInterface |
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{ |
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$method = $request->getMethod(); |
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$uri = $request->getUri()->getPath(); |
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$match = $this->dispatch($method, $uri); |
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switch ($match[0]) { |
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case FastRoute::NOT_FOUND: |
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$this->setNotFoundDecoratorMiddleware(); |
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break; |
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case FastRoute::METHOD_NOT_ALLOWED: |
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$allowed = (array) $match[1]; |
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$this->setMethodNotAllowedDecoratorMiddleware($allowed); |
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break; |
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case FastRoute::FOUND: |
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$route = $this->ensureHandlerIsRoute($match[1], $method, $uri)->setVars($match[2]); |
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if ($this->isExtraConditionMatch($route, $request)) { |
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$this->setFoundMiddleware($route); |
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$request = $this->requestWithRouteAttributes($request, $route); |
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break; |
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} |
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$this->setNotFoundDecoratorMiddleware(); |
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break; |
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} |
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return $this->handle($request); |
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} |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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$middleware = $this->shiftMiddleware(); |
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return $middleware->process($request, $this); |
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} |
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protected function ensureHandlerIsRoute($matchingHandler, $httpMethod, $uri): Route |
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{ |
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if ($matchingHandler instanceof Route) { |
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return $matchingHandler; |
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} |
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return new Route($httpMethod, $uri, $matchingHandler); |
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} |
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protected function isExtraConditionMatch(Route $route, ServerRequestInterface $request): bool |
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{ |
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// check for scheme condition |
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$scheme = $route->getScheme(); |
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if ($scheme !== null && $scheme !== $request->getUri()->getScheme()) { |
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return false; |
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} |
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// check for domain condition |
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$host = $route->getHost(); |
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if ($host !== null && $host !== $request->getUri()->getHost()) { |
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return false; |
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} |
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// check for port condition |
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$port = $route->getPort(); |
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if ($port !== null && $port !== $request->getUri()->getPort()) { |
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return false; |
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} |
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return true; |
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} |
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protected function requestWithRouteAttributes(ServerRequestInterface $request, Route $route): ServerRequestInterface |
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{ |
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$routerParams = $route->getVars(); |
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foreach ($routerParams as $key => $value) { |
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$request = $request->withAttribute($key, $value); |
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} |
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return $request; |
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} |
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protected function setFoundMiddleware(Route $route): void |
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{ |
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if ($route->getStrategy() === null) { |
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$strategy = $this->getStrategy(); |
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if (!($strategy instanceof StrategyInterface)) { |
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throw new RuntimeException('Cannot determine strategy to use for dispatch of found route'); |
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} |
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$route->setStrategy($strategy); |
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} |
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$strategy = $route->getStrategy(); |
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$container = $strategy instanceof ContainerAwareInterface ? $strategy->getContainer() : null; |
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foreach ($this->getMiddlewareStack() as $key => $middleware) { |
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$this->middleware[$key] = $this->resolveMiddleware($middleware, $container); |
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} |
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// wrap entire dispatch process in exception handler |
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$this->prependMiddleware($strategy->getThrowableHandler()); |
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// add group and route specific middleware |
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if ($group = $route->getParentGroup()) { |
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foreach ($group->getMiddlewareStack() as $middleware) { |
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$this->middleware($this->resolveMiddleware($middleware, $container)); |
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} |
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} |
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foreach ($route->getMiddlewareStack() as $middleware) { |
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$this->middleware($this->resolveMiddleware($middleware, $container)); |
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} |
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// add actual route to end of stack |
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$this->middleware($route); |
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} |
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protected function setMethodNotAllowedDecoratorMiddleware(array $allowed): void |
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{ |
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$strategy = $this->getStrategy(); |
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if (!($strategy instanceof StrategyInterface)) { |
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throw new RuntimeException('Cannot determine strategy to use for dispatch of method not allowed route'); |
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} |
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$middleware = $strategy->getMethodNotAllowedDecorator(new MethodNotAllowedException($allowed)); |
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$this->prependMiddleware($middleware); |
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} |
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protected function setNotFoundDecoratorMiddleware(): void |
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{ |
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$strategy = $this->getStrategy(); |
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if (!($strategy instanceof StrategyInterface)) { |
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throw new RuntimeException('Cannot determine strategy to use for dispatch of not found route'); |
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} |
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$middleware = $strategy->getNotFoundDecorator(new NotFoundException()); |
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$this->prependMiddleware($middleware); |
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} |
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} |
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