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<?php 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}; |
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use OutOfBoundsException; |
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use Psr\Http\Message\{ResponseInterface, ServerRequestInterface}; |
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use Psr\Http\Server\RequestHandlerInterface; |
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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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/** |
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* Dispatch the current route |
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* |
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* @param \Psr\Http\Message\ServerRequestInterface $request |
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* |
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* @return \Psr\Http\Message\ResponseInterface |
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*/ |
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public function dispatchRequest(ServerRequestInterface $request) : ResponseInterface |
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{ |
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$httpMethod = $request->getMethod(); |
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$uri = $request->getUri()->getPath(); |
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$match = $this->dispatch($httpMethod, $uri); |
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switch ($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], $httpMethod, $uri)->setVars($match[2]); |
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$this->setFoundMiddleware($route); |
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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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/** |
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* Ensure handler is a Route, honoring the contract of dispatchRequest. |
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* |
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* @param Route|mixed $matchingHandler |
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* @param string $httpMethod |
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* @param string $uri |
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* |
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* @return Route |
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* |
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*/ |
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private function ensureHandlerIsRoute($matchingHandler, $httpMethod, $uri) : Route |
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{ |
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if (is_a($matchingHandler, Route::class)) { |
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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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/** |
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* {@inheritdoc} |
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*/ |
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public function handle(ServerRequestInterface $request) : ResponseInterface |
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{ |
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$middleware = $this->shiftMiddleware(); |
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if (is_null($middleware)) { |
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throw new OutOfBoundsException('Reached end of middleware stack. Does your controller return a response?'); |
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} |
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return $middleware->process($request, $this); |
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} |
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/** |
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* Set up middleware for a found route |
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* |
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* @param \League\Route\Route $route |
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* |
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* @return void |
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*/ |
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protected function setFoundMiddleware(Route $route) : void |
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{ |
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if (is_null($route->getStrategy())) { |
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$route->setStrategy($this->getStrategy()); |
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} |
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// wrap entire dispatch process in exception handler |
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$this->prependMiddleware($route->getStrategy()->getExceptionHandler()); |
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// add group and route specific middleware |
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if ($group = $route->getParentGroup()) { |
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$this->middlewares($group->getMiddlewareStack()); |
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} |
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$this->middlewares($route->getMiddlewareStack()); |
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// add actual route to end of stack |
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$this->middleware($route); |
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} |
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/** |
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* Set up middleware for a not found route |
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* |
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* @return void |
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*/ |
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protected function setNotFoundDecoratorMiddleware() : void |
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{ |
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$middleware = $this->getStrategy()->getNotFoundDecorator(new NotFoundException); |
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$this->prependMiddleware($middleware); |
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} |
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/** |
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* Set up middleware for a not allowed route |
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* |
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* @param array $allowed |
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* |
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* @return void |
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*/ |
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protected function setMethodNotAllowedDecoratorMiddleware(array $allowed) : void |
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{ |
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$middleware = $this->getStrategy()->getMethodNotAllowedDecorator( |
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new MethodNotAllowedException($allowed) |
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); |
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$this->prependMiddleware($middleware); |
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} |
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} |
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thephpleague /
route
