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RoutingMiddleware.php
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RoutingMiddleware.php
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<?php
/**
* Slim Framework (https://slimframework.com)
*
* @license https://github.com/slimphp/Slim/blob/4.x/LICENSE.md (MIT License)
*/
declare(strict_types=1);
namespace Slim\Middleware;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use RuntimeException;
use Slim\Exception\HttpMethodNotAllowedException;
use Slim\Exception\HttpNotFoundException;
use Slim\Interfaces\RouteParserInterface;
use Slim\Interfaces\RouteResolverInterface;
use Slim\Routing\RouteContext;
use Slim\Routing\RoutingResults;
class RoutingMiddleware implements MiddlewareInterface
{
protected RouteResolverInterface $routeResolver;
protected RouteParserInterface $routeParser;
public function __construct(RouteResolverInterface $routeResolver, RouteParserInterface $routeParser)
{
$this->routeResolver = $routeResolver;
$this->routeParser = $routeParser;
}
/**
* @throws HttpNotFoundException
* @throws HttpMethodNotAllowedException
* @throws RuntimeException
*/
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
$request = $this->performRouting($request);
return $handler->handle($request);
}
/**
* Perform routing
*
* @param ServerRequestInterface $request PSR7 Server Request
*
* @throws HttpNotFoundException
* @throws HttpMethodNotAllowedException
* @throws RuntimeException
*/
public function performRouting(ServerRequestInterface $request): ServerRequestInterface
{
$request = $request->withAttribute(RouteContext::ROUTE_PARSER, $this->routeParser);
$routingResults = $this->resolveRoutingResultsFromRequest($request);
$routeStatus = $routingResults->getRouteStatus();
$request = $request->withAttribute(RouteContext::ROUTING_RESULTS, $routingResults);
switch ($routeStatus) {
case RoutingResults::FOUND:
$routeArguments = $routingResults->getRouteArguments();
$routeIdentifier = $routingResults->getRouteIdentifier() ?? '';
$route = $this->routeResolver
->resolveRoute($routeIdentifier)
->prepare($routeArguments);
return $request->withAttribute(RouteContext::ROUTE, $route);
case RoutingResults::NOT_FOUND:
throw new HttpNotFoundException($request);
case RoutingResults::METHOD_NOT_ALLOWED:
$exception = new HttpMethodNotAllowedException($request);
$exception->setAllowedMethods($routingResults->getAllowedMethods());
throw $exception;
default:
throw new RuntimeException('An unexpected error occurred while performing routing.');
}
}
/**
* Resolves the route from the given request
*/
protected function resolveRoutingResultsFromRequest(ServerRequestInterface $request): RoutingResults
{
return $this->routeResolver->computeRoutingResults(
$request->getUri()->getPath(),
$request->getMethod()
);
}
}