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<?php namespace Limoncello\Application\Packages\Cors; |
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/** |
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* Copyright 2015-2017 [email protected] |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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use Closure; |
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use Limoncello\Contracts\Application\MiddlewareInterface; |
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use Neomerx\Cors\Contracts\AnalysisResultInterface; |
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use Neomerx\Cors\Contracts\AnalyzerInterface; |
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use Psr\Container\ContainerInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Zend\Diactoros\Response\EmptyResponse; |
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/** |
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* @package Limoncello\Application |
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*/ |
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class CorsMiddleware implements MiddlewareInterface |
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{ |
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/** |
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* @param ServerRequestInterface $request |
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* @param Closure $next |
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* @param ContainerInterface $container |
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* |
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* @return ResponseInterface |
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*/ |
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public static function handle( |
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ServerRequestInterface $request, |
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Closure $next, |
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ContainerInterface $container |
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): ResponseInterface { |
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/** @var AnalyzerInterface $analyzer */ |
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$analyzer = $container->get(AnalyzerInterface::class); |
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$analysis = $analyzer->analyze($request); |
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switch ($analysis->getRequestType()) { |
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case AnalysisResultInterface::TYPE_REQUEST_OUT_OF_CORS_SCOPE: |
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// call next middleware handler |
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return $next($request); |
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case AnalysisResultInterface::TYPE_ACTUAL_REQUEST: |
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// actual CORS request |
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$corsHeaders = $analysis->getResponseHeaders(); |
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/** @var ResponseInterface $response */ |
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$response = $next($request); |
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// add CORS headers to Response $response |
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foreach ($corsHeaders as $name => $value) { |
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$response = $response->withHeader($name, $value); |
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} |
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return $response; |
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case AnalysisResultInterface::TYPE_PRE_FLIGHT_REQUEST: |
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// return 200 HTTP with $corsHeaders |
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return new EmptyResponse(200, $analysis->getResponseHeaders()); |
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case AnalysisResultInterface::ERR_ORIGIN_NOT_ALLOWED: |
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return static::getErrorOriginNotAllowedResponse($analysis); |
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case AnalysisResultInterface::ERR_METHOD_NOT_SUPPORTED: |
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return static::getErrorMethodNotSupportedResponse($analysis); |
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case AnalysisResultInterface::ERR_HEADERS_NOT_SUPPORTED: |
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return static::getErrorHeadersNotSupportedResponse($analysis); |
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case AnalysisResultInterface::ERR_NO_HOST_HEADER: |
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default: |
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assert($analysis->getRequestType() === AnalysisResultInterface::ERR_NO_HOST_HEADER); |
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return static::getErrorNoHostHeaderResponse($analysis); |
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} |
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} |
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/** |
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* @param AnalysisResultInterface $analysis |
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* |
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* @return ResponseInterface |
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* |
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* @SuppressWarnings(PHPMD.UnusedFormalParameter) |
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*/ |
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protected static function getErrorNoHostHeaderResponse( |
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/** @noinspection PhpUnusedParameterInspection */ |
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AnalysisResultInterface $analysis |
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): ResponseInterface { |
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return new EmptyResponse(400); |
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} |
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/** |
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* @param AnalysisResultInterface $analysis |
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* |
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* @return ResponseInterface |
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* |
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* @SuppressWarnings(PHPMD.UnusedFormalParameter) |
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*/ |
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protected static function getErrorOriginNotAllowedResponse( |
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/** @noinspection PhpUnusedParameterInspection */ |
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AnalysisResultInterface $analysis |
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): ResponseInterface { |
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return new EmptyResponse(400); |
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} |
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/** |
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* @param AnalysisResultInterface $analysis |
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* |
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* @return ResponseInterface |
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* |
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* @SuppressWarnings(PHPMD.UnusedFormalParameter) |
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*/ |
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protected static function getErrorMethodNotSupportedResponse( |
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/** @noinspection PhpUnusedParameterInspection */ |
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AnalysisResultInterface $analysis |
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): ResponseInterface { |
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return new EmptyResponse(400); |
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} |
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/** |
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* @param AnalysisResultInterface $analysis |
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* |
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* @return ResponseInterface |
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* |
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* @SuppressWarnings(PHPMD.UnusedFormalParameter) |
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*/ |
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protected static function getErrorHeadersNotSupportedResponse( |
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/** @noinspection PhpUnusedParameterInspection */ |
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AnalysisResultInterface $analysis |
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1 |
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): ResponseInterface { |
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return new EmptyResponse(400); |
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} |
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} |
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limoncello-php-dist /
application
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