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<?php |
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declare(strict_types=1); |
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namespace Jasny\Auth; |
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use Improved\IteratorPipeline\Pipeline; |
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use Jasny\Auth\AuthzInterface as Authz; |
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use Psr\Http\Message\ServerRequestInterface as ServerRequest; |
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use Psr\Http\Message\ResponseInterface as Response; |
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use Psr\Http\Message\ResponseFactoryInterface as ResponseFactory; |
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use Psr\Http\Server\RequestHandlerInterface as RequestHandler; |
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use Psr\Http\Server\MiddlewareInterface; |
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/** |
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* Middleware for access control. |
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*/ |
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class AuthMiddleware implements MiddlewareInterface |
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{ |
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protected Authz $auth; |
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protected ?ResponseFactory $responseFactory = null; |
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/** Function to get the required role from the request. */ |
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protected \Closure $getRequiredRole; |
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/** |
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* Class constructor |
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* |
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* @param Authz $auth |
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* @param callable $getRequiredRole |
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*/ |
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public function __construct(Authz $auth, callable $getRequiredRole, ?ResponseFactory $responseFactory = null) |
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{ |
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$this->auth = $auth; |
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$this->responseFactory = $responseFactory; |
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$this->getRequiredRole = \Closure::fromCallable($getRequiredRole); |
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} |
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/** |
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* Process an incoming server request (PSR-15). |
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* |
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* @param ServerRequest $request |
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* @param RequestHandler $handler |
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* @return Response |
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*/ |
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public function process(ServerRequest $request, RequestHandler $handler): Response |
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{ |
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$this->initialize(); |
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if (!$this->isAllowed($request)) { |
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return $this->forbidden($request); |
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} |
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return $handler->handle($request); |
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} |
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/** |
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* Get a callback that can be used as double pass middleware. |
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* |
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* @return callable |
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*/ |
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public function asDoublePass(): callable |
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{ |
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return function (ServerRequest $request, Response $response, callable $next): Response { |
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$this->initialize(); |
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if (!$this->isAllowed($request)) { |
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return $this->forbidden($request, $response); |
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} |
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return $next($request, $response); |
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}; |
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} |
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/** |
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* Initialize the auth service. |
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*/ |
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protected function initialize(): void |
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{ |
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if ($this->auth instanceof Auth && !$this->auth->isInitialized()) { |
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$this->auth->initialize(); |
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} |
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} |
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/** |
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* Check if the request is allowed by the current user. |
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*/ |
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protected function isAllowed(ServerRequest $request): bool |
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{ |
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$requiredRole = ($this->getRequiredRole)($request); |
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if ($requiredRole === null) { |
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return true; |
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} |
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if (is_bool($requiredRole)) { |
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return ($this->auth->user() !== null) === $requiredRole; |
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} |
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return Pipeline::with(is_array($requiredRole) ? $requiredRole : [$requiredRole]) |
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->hasAny(fn($role) => $this->auth->is($role)); |
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} |
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/** |
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* Respond with forbidden (or unauthorized). |
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*/ |
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protected function forbidden(ServerRequest $request, ?Response $response = null): Response |
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{ |
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$unauthorized = $this->auth->user() === null; |
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$forbiddenResponse = $this->createResponse($unauthorized ? 401 : 403, $response) |
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->withProtocolVersion($request->getProtocolVersion()); |
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$forbiddenResponse->getBody()->write('Access denied'); |
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return $forbiddenResponse; |
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} |
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/** |
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* Create a response using the response factory. |
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* |
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* @param int $status Response status |
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* @param Response|null $originalResponse |
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* @return Response |
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*/ |
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protected function createResponse(int $status, ?Response $originalResponse = null): Response |
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{ |
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if ($this->responseFactory !== null) { |
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return $this->responseFactory->createResponse($status); |
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} elseif ($originalResponse !== null) { |
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return $originalResponse->withStatus($status)->withBody(clone $originalResponse->getBody()); |
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; |
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} else { |
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throw new \LogicException('Response factory not set'); |
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} |
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} |
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} |
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jasny /
auth
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