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<?php |
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declare(strict_types=1); |
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namespace UMA\JsonRpc; |
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use LogicException; |
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use Psr\Container\ContainerExceptionInterface; |
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use Psr\Container\ContainerInterface; |
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use Psr\Container\NotFoundExceptionInterface; |
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use TypeError; |
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use UMA\JsonRpc\Internal\Assert; |
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use UMA\JsonRpc\Internal\Input; |
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use UMA\JsonRpc\Internal\MiddlewareStack; |
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use UMA\JsonRpc\Internal\Validator; |
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class Server |
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{ |
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/** |
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* @var ContainerInterface |
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*/ |
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private $container; |
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/** |
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* @var string[] |
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*/ |
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private $methods; |
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/** |
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* @var string[] |
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*/ |
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private $middlewares; |
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/** |
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* @var int|null |
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*/ |
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protected $batchLimit; |
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public function __construct(ContainerInterface $container, int $batchLimit = null) |
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{ |
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$this->container = $container; |
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$this->batchLimit = $batchLimit; |
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$this->methods = []; |
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$this->middlewares = []; |
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} |
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public function set(string $method, string $serviceId): Server |
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{ |
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if (!$this->container->has($serviceId)) { |
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throw new LogicException("Cannot find service '$serviceId' in the container"); |
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} |
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$this->methods[$method] = $serviceId; |
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return $this; |
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} |
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public function attach(string $serviceId): Server |
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{ |
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if (!$this->container->has($serviceId)) { |
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throw new LogicException("Cannot find service '$serviceId' in the container"); |
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} |
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$this->middlewares[$serviceId] = null; |
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return $this; |
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} |
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/** |
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* @throws TypeError |
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*/ |
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public function run(string $raw): ?string |
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{ |
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$input = Input::fromString($raw); |
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if (!$input->parsable()) { |
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return self::end(Error::parsing()); |
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} |
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if ($input->isArray()) { |
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if ($this->tooManyBatchRequests($input)) { |
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return self::end(Error::tooManyBatchRequests($this->batchLimit)); |
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} |
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return $this->batch($input); |
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} |
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return $this->single($input); |
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} |
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protected function batch(Input $input): ?string |
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{ |
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\assert($input->isArray()); |
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$responses = []; |
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foreach ($input->data() as $request) { |
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$pseudoInput = Input::fromSafeData($request); |
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if (null !== $response = $this->single($pseudoInput)) { |
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$responses[] = $response; |
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} |
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} |
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return empty($responses) ? |
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null : \sprintf('[%s]', \implode(',', $responses)); |
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} |
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/** |
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* @throws TypeError |
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*/ |
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protected function single(Input $input): ?string |
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{ |
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if (!$input->isRpcRequest()) { |
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return self::end(Error::invalidRequest()); |
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} |
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$request = new Request($input); |
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if (!\array_key_exists($request->method(), $this->methods)) { |
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return self::end(Error::unknownMethod($request->id()), $request); |
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} |
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try { |
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$procedure = Assert::isProcedure( |
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$this->container->get($this->methods[$request->method()]) |
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); |
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} catch (ContainerExceptionInterface | NotFoundExceptionInterface $e) { |
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return self::end(Error::internal($request->id()), $request); |
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} |
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if (!Validator::validate($procedure->getSpec(), $request->params())) { |
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return self::end(Error::invalidParams($request->id()), $request); |
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} |
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$stack = MiddlewareStack::compose( |
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$procedure, |
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...\array_map(function(string $serviceId) { |
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return $this->container->get($serviceId); |
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}, \array_keys($this->middlewares)) |
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); |
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return self::end($stack($request), $request); |
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} |
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protected function tooManyBatchRequests(Input $input): bool |
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{ |
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\assert($input->isArray()); |
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return \is_int($this->batchLimit) && $this->batchLimit < \count($input->data()); |
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} |
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protected static function end(Response $response, Request $request = null): ?string |
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{ |
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return $request instanceof Request && null === $request->id() ? |
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null : \json_encode($response); |
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} |
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} |
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1ma /
JsonRpc
