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<?php |
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namespace BenTools\MercurePHP\Controller; |
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use BenTools\MercurePHP\Exception\Http\AccessDeniedHttpException; |
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use BenTools\MercurePHP\Exception\Http\BadRequestHttpException; |
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use BenTools\MercurePHP\Security\Authenticator; |
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use BenTools\MercurePHP\Security\TopicMatcher; |
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use BenTools\MercurePHP\Model\Message; |
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use Lcobucci\JWT\Token; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Log\LoggerInterface; |
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use Ramsey\Uuid\Uuid; |
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use React\Http\Message\Response; |
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use React\Promise\PromiseInterface; |
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use function React\Promise\resolve; |
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final class PublishController extends AbstractController |
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{ |
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private Authenticator $authenticator; |
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public function __construct(LoggerInterface $logger) |
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{ |
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$this->logger = $logger; |
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} |
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public function __invoke(ServerRequestInterface $request): PromiseInterface |
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{ |
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$request = $this->withAttributes($request); |
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$token = $request->getAttribute('token'); |
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$topicSelectors = $this->getAuthorizedTopicSelectors($token); |
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$input = (array) $request->getParsedBody(); |
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$input = $this->normalizeInput($input); |
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$canDispatchPrivateUpdates = ([] !== $topicSelectors); |
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if ($input['private'] && !$canDispatchPrivateUpdates) { |
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throw new AccessDeniedHttpException('You are not allowed to dispatch private updates.'); |
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} |
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if (false === TopicMatcher::canUpdateTopic($input['topic'], $token, $input['private'])) { |
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throw new AccessDeniedHttpException('You are not allowed to update this topic.'); |
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} |
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$id = $input['id'] ?? (string) Uuid::uuid4(); |
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$message = new Message( |
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$id, |
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$input['data'], |
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(bool) $input['private'], |
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$input['type'], |
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null !== $input['retry'] ? (int) $input['retry'] : null |
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); |
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$this->transport |
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->publish($input['topic'], $message) |
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->then(fn () => $this->storage->storeMessage($input['topic'], $message)); |
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$this->logger->debug( |
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\sprintf( |
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'Created message %s on topic %s', |
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$message->getId(), |
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$input['topic'], |
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) |
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); |
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$headers = [ |
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'Content-Type' => 'text/plain', |
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'Cache-Control' => 'no-cache', |
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]; |
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return resolve(new Response(201, $headers, $id)); |
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} |
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public function matchRequest(RequestInterface $request): bool |
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{ |
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return 'POST' === $request->getMethod() |
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&& '/.well-known/mercure' === $request->getUri()->getPath(); |
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} |
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public function withConfig(array $config): self |
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{ |
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/** @var self $clone */ |
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$clone = parent::withConfig($config); |
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return $clone->withAuthenticator(Authenticator::createPublisherAuthenticator($config)); |
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} |
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private function normalizeInput(array $input): array |
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{ |
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if (!\is_scalar($input['topic'] ?? null)) { |
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throw new BadRequestHttpException('Invalid topic parameter.'); |
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} |
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if (!\is_scalar($input['data'] ?? '')) { |
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throw new BadRequestHttpException('Invalid data parameter.'); |
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} |
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if (isset($input['id']) && !Uuid::isValid($input['id'])) { |
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throw new BadRequestHttpException('Invalid UUID.'); |
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} |
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$input['data'] ??= null; |
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$input['private'] ??= false; |
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$input['type'] ??= null; |
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$input['retry'] ??= null; |
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return $input; |
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} |
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private function withAttributes(ServerRequestInterface $request): ServerRequestInterface |
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{ |
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try { |
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$token = $this->authenticator->authenticate($request); |
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} catch (\RuntimeException $e) { |
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throw new AccessDeniedHttpException($e->getMessage()); |
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} |
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return $request->withAttribute('token', $token ?? null); |
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} |
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private function getAuthorizedTopicSelectors(?Token $token): array |
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{ |
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if (null === $token) { |
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throw new AccessDeniedHttpException('Invalid auth token.'); |
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} |
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try { |
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$claim = $token->getClaim('mercure'); |
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} catch (\OutOfBoundsException $e) { |
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throw new AccessDeniedHttpException('Provided auth token doesn\'t contain the "mercure" claim.'); |
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} |
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$topicSelectors = $claim->publish ?? null; |
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if (null === $topicSelectors || !\is_array($topicSelectors)) { |
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throw new AccessDeniedHttpException('Your are not authorized to publish on this hub.'); |
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} |
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return $topicSelectors; |
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} |
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private function withAuthenticator(Authenticator $authenticator): self |
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{ |
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$clone = clone $this; |
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$clone->authenticator = $authenticator; |
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return $clone; |
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} |
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} |
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bpolaszek /
mercure-php-hub
