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<?php |
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/** |
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* This file is part of the Shieldon package. |
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* |
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* (c) Terry L. <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* php version 7.1.0 |
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* |
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* @category Web-security |
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* @package Shieldon |
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* @author Terry Lin <[email protected]> |
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* @copyright 2019 terrylinooo |
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* @license https://github.com/terrylinooo/shieldon/blob/2.x/LICENSE MIT |
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* @link https://github.com/terrylinooo/shieldon |
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* @see https://shieldon.io |
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*/ |
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declare(strict_types=1); |
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namespace Shieldon\Firewall\Middleware; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Shieldon\Psr7\Response; |
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/** |
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* A PSR-15 middleware that denys requests without specific header inforamtion. |
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*/ |
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class Header implements MiddlewareInterface |
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{ |
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/** |
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* 406 - Not Acceptable. |
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* |
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* @var int |
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*/ |
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const HTTP_STATUS_CODE = 406; |
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/** |
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* Very common requests from normal users. |
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* |
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* @var array |
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*/ |
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protected $fieldList = [ |
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'Accept', |
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'Accept-Language', |
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'Accept-Encoding', |
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]; |
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/** |
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* Constructor. |
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* |
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* @param array $fieldList The list that want to be denied. |
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* |
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* @return void |
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*/ |
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public function __construct(array $fieldList = []) |
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{ |
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if (!empty($fieldList)) { |
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$this->fieldList = $fieldList; |
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} |
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} |
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/** |
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* Invoker. |
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* |
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* @param ServerRequestInterface $request The PSR-7 server request. |
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* @param RequestHandlerInterface $handler The PSR-15 request handler. |
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* |
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* @return ResponseInterface |
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*/ |
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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foreach ($this->fieldList as $fieldName) { |
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if (!$request->hasHeader($fieldName)) { |
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return (new Response)->withStatus(self::HTTP_STATUS_CODE); |
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} |
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} |
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return $handler->handle($request); |
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1 |
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} |
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} |
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terrylinooo /
shieldon
