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<?php |
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declare(strict_types=1); |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2019 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace OAuth2Framework\Component\WebFingerEndpoint; |
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use Assert\Assertion; |
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use OAuth2Framework\Component\WebFingerEndpoint\IdentifierResolver\Identifier; |
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use OAuth2Framework\Component\WebFingerEndpoint\IdentifierResolver\IdentifierResolverManager; |
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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\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use function Safe\json_encode; |
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use function Safe\sprintf; |
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final class WebFingerEndpoint implements MiddlewareInterface |
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{ |
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/** |
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* @var ResponseFactoryInterface |
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*/ |
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private $responseFactory; |
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/** |
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* @var IdentifierResolverManager |
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*/ |
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private $identifierResolverManager; |
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/** |
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* @var ResourceRepository |
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*/ |
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private $resourceRepository; |
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public function __construct(ResponseFactoryInterface $responseFactory, ResourceRepository $resourceRepository, IdentifierResolverManager $identifierResolverManager) |
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{ |
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$this->resourceRepository = $resourceRepository; |
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$this->responseFactory = $responseFactory; |
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$this->identifierResolverManager = $identifierResolverManager; |
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} |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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try { |
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$resource = $this->getResource($request); |
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$identifier = $this->getIdentifier($resource); |
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$resourceDescriptor = $this->resourceRepository->find($resource, $identifier); |
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Assertion::notNull($resourceDescriptor, sprintf('The resource identified with "%s" does not exist or is not supported by this server.', $resource)); |
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$filteredResourceDescriptor = $this->filterLinks($request, $resourceDescriptor); |
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$response = $this->responseFactory->createResponse(200); |
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$headers = [ |
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'Content-Type' => 'application/jrd+json; charset=UTF-8', |
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]; |
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$response->getBody()->write(json_encode($filteredResourceDescriptor, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)); |
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} catch (\InvalidArgumentException $e) { |
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$response = $this->responseFactory->createResponse(400); |
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$headers = [ |
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'Content-Type' => 'application/json; charset=UTF-8', |
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]; |
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$response->getBody()->write(json_encode(['error' => 'invalid_request', 'error_description' => $e->getMessage()], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)); |
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} |
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foreach ($headers as $k => $v) { |
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$response = $response->withHeader($k, $v); |
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} |
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return $response; |
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} |
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private function getIdentifier(string $resource): Identifier |
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{ |
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try { |
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return $this->identifierResolverManager->resolve($resource); |
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} catch (\Throwable $e) { |
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throw new \InvalidArgumentException(sprintf('The resource identified with "%s" does not exist or is not supported by this server.', $resource), 400, $e); |
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} |
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} |
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private function getResource(ServerRequestInterface $request): string |
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{ |
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$query_params = $request->getQueryParams() ?? []; |
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Assertion::keyExists($query_params, 'resource', 'The parameter "resource" is mandatory.'); |
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return $query_params['resource']; |
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} |
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private function filterLinks(ServerRequestInterface $request, ResourceDescriptor $resourceDescriptor): array |
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{ |
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$data = $resourceDescriptor->jsonSerialize(); |
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$rels = $this->getRels($request); |
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if (!\array_key_exists('links', $data) || 0 === \count($rels) || 0 === \count($data['links'])) { |
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return $data; |
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} |
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$data['links'] = array_filter($data['links'], static function (Link $link) use ($rels): bool { |
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if (\in_array($link->getRel(), $rels, true)) { |
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return true; |
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} |
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return false; |
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}); |
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if (0 === \count($data['links'])) { |
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unset($data['links']); |
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} |
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return $data; |
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} |
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/** |
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* @return string[] |
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*/ |
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private function getRels(ServerRequestInterface $request): array |
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{ |
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$queryParams = $request->getQueryParams(); |
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if (!\array_key_exists('rel', $queryParams)) { |
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return []; |
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} |
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switch (true) { |
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case \is_string($queryParams['rel']): |
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return [$queryParams['rel']]; |
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case \is_array($queryParams['rel']): |
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return $queryParams['rel']; |
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default: |
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return []; |
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} |
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} |
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} |
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OAuth2-Framework /
oauth2-framework
