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<?php |
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/** |
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* Spiral Framework. |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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declare(strict_types=1); |
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namespace Spiral\Http; |
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use Psr\Http\Message\ResponseFactoryInterface; |
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use Psr\Http\Message\ResponseInterface as Response; |
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use Psr\Http\Message\ServerRequestInterface as Request; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Spiral\Http\Traits\JsonTrait; |
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/** |
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* Provides ability to invoke any handler and write it's response into ResponseInterface. |
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*/ |
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final class CallableHandler implements RequestHandlerInterface |
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{ |
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use JsonTrait; |
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/** @var callable */ |
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private $callable; |
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/** @var ResponseFactoryInterface */ |
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private $responseFactory; |
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/** |
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* @param callable $callable |
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* @param ResponseFactoryInterface $responseFactory |
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*/ |
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public function __construct(callable $callable, ResponseFactoryInterface $responseFactory) |
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{ |
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$this->callable = $callable; |
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$this->responseFactory = $responseFactory; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function handle(Request $request): Response |
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{ |
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$outputLevel = ob_get_level(); |
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ob_start(); |
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$output = $result = null; |
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$response = $this->responseFactory->createResponse(200); |
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try { |
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$result = ($this->callable)($request, $response); |
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} catch (\Throwable $e) { |
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ob_get_clean(); |
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throw $e; |
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} finally { |
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while (ob_get_level() > $outputLevel + 1) { |
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$output = ob_get_clean() . $output; |
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} |
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} |
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return $this->wrapResponse( |
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$response, |
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$result, |
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ob_get_clean() . $output |
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); |
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} |
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/** |
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* Convert endpoint result into valid response. |
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* |
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* @param Response $response Initial pipeline response. |
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* @param mixed $result Generated endpoint output. |
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* @param string $output Buffer output. |
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* @return Response |
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*/ |
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private function wrapResponse(Response $response, $result = null, string $output = ''): Response |
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{ |
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if ($result instanceof Response) { |
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if (!empty($output) && $result->getBody()->isWritable()) { |
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$result->getBody()->write($output); |
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} |
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return $result; |
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} |
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if (is_array($result) || $result instanceof \JsonSerializable) { |
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$response = $this->writeJson($response, $result); |
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} else { |
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$response->getBody()->write((string)$result); |
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} |
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//Always glue buffered output |
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$response->getBody()->write($output); |
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return $response; |
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} |
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} |
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spiral /
framework
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