openapi-generator/samples/server/petstore/php-slim4/lib/App/ResponseEmitter.php

<?php

/**
 * OpenAPI Petstore
 * PHP version 7.4
 *
 * @package OpenAPIServer
 * @author  OpenAPI Generator team
 * @link    https://github.com/openapitools/openapi-generator
 */

/**
 * This is a sample server Petstore server. For this sample, you can use the api key `special-key` to test the authorization filters.
 * The version of the OpenAPI document: 1.0.0
 * Generated by: https://github.com/openapitools/openapi-generator.git
 */

declare(strict_types=1);

/**
 * NOTE: This class is auto generated by the openapi generator program.
 * https://github.com/openapitools/openapi-generator
 * Do not edit the class manually.
 */
namespace OpenAPIServer\App;

use Neomerx\Cors\Contracts\AnalysisResultInterface;
use Neomerx\Cors\Contracts\AnalyzerInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\RequestInterface;
use Slim\Exception\HttpBadRequestException;
use Slim\Middleware\ErrorMiddleware;
use Slim\ResponseEmitter as SlimResponseEmitter;

/**
 * Custom response emitter to support lazy CORS.
 * @see https://github.com/slimphp/Slim-Skeleton/blob/037cfa2b6885301fc32a5b18a00a251a534aac81/src/Application/ResponseEmitter/ResponseEmitter.php
 */
class ResponseEmitter extends SlimResponseEmitter
{
    /**
     * @var RequestInterface
     */
    protected $request;

    /**
     * @var ErrorMiddleware
     */
    protected $errorMiddleware;

    /**
     * @var AnalyzerInterface
     */
    protected $analyzer;

    /**
     * Set request.
     * @param RequestInterface $request
     * @return ResponseEmitter
     */
    public function setRequest(RequestInterface $request): ResponseEmitter
    {
        $this->request = $request;
        return $this;
    }

    /**
     * Set error middleware.
     * @param ErrorMiddleware $errorMiddleware
     * @return ResponseEmitter
     */
    public function setErrorMiddleware(ErrorMiddleware $errorMiddleware): ResponseEmitter
    {
        $this->errorMiddleware = $errorMiddleware;
        return $this;
    }

    /**
     * Set CORS request analyzer.
     * @param AnalyzerInterface $analyzer
     * @return ResponseEmitter
     */
    public function setAnalyzer(AnalyzerInterface $analyzer): ResponseEmitter
    {
        $this->analyzer = $analyzer;
        return $this;
    }

    /**
     * Send the response the client
     *
     * @param ResponseInterface $response
     * @return void
     */
    public function emit(ResponseInterface $response): void
    {
        // slightly modified CORS handler from package documentation example
        // @see https://github.com/neomerx/cors-psr7#sample-usage
        $cors = $this->analyzer->analyze($this->request);
        $errorMsg = null;

        switch ($cors->getRequestType()) {
            case AnalysisResultInterface::ERR_NO_HOST_HEADER:
                $errorMsg = 'CORS no host header in request';
                break;
            case AnalysisResultInterface::ERR_ORIGIN_NOT_ALLOWED:
                $errorMsg = 'CORS request origin is not allowed';
                break;
            case AnalysisResultInterface::ERR_METHOD_NOT_SUPPORTED:
                $errorMsg = 'CORS requested method is not supported';
                break;
            case AnalysisResultInterface::ERR_HEADERS_NOT_SUPPORTED:
                $errorMsg = 'CORS requested header is not allowed';
                break;
            case AnalysisResultInterface::TYPE_REQUEST_OUT_OF_CORS_SCOPE:
                // do nothing
                break;
            case AnalysisResultInterface::TYPE_PRE_FLIGHT_REQUEST:
            default:
                // actual CORS request
                $corsHeaders = $cors->getResponseHeaders();

                // add CORS headers to Response $response
                foreach ($corsHeaders as $name => $value) {
                    $response = $response->withHeader($name, $value);
                }
        }

        if (!empty($errorMsg)) {
            $exception = new HttpBadRequestException($this->request, sprintf('%s.', $errorMsg));
            $exception->setTitle(\sprintf('%d %s', $exception->getCode(), $errorMsg));
            $exception->setDescription($exception->getMessage());
            $response = $this->errorMiddleware->handleException($this->request, $exception);
        }

        if (ob_get_contents()) {
            ob_clean();
        }

        parent::emit($response);
    }
}