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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\Session\Middleware; |
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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\Message\UriInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface as Handler; |
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use Spiral\Cookies\Config\CookiesConfig; |
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use Spiral\Cookies\Cookie; |
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use Spiral\Core\ScopeInterface; |
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use Spiral\Http\Config\HttpConfig; |
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use Spiral\Session\Config\SessionConfig; |
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use Spiral\Session\SessionFactory; |
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use Spiral\Session\SessionInterface; |
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final class SessionMiddleware implements MiddlewareInterface |
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{ |
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public const ATTRIBUTE = 'session'; |
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// Header set used to sign session |
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protected const SIGNATURE_HEADERS = ['User-Agent', 'Accept-Language', 'Accept-Encoding']; |
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/** @var SessionConfig */ |
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private $config; |
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/** @var HttpConfig */ |
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private $httpConfig; |
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/** @var CookiesConfig */ |
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private $cookiesConfig; |
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/** @var SessionFactory */ |
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private $factory; |
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/** @var ScopeInterface */ |
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private $scope; |
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/** |
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* @param SessionConfig $config |
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* @param HttpConfig $httpConfig |
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* @param CookiesConfig $cookiesConfig |
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* @param SessionFactory $factory |
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* @param ScopeInterface $scope |
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*/ |
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public function __construct( |
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SessionConfig $config, |
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HttpConfig $httpConfig, |
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CookiesConfig $cookiesConfig, |
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SessionFactory $factory, |
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ScopeInterface $scope |
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) { |
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$this->config = $config; |
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$this->httpConfig = $httpConfig; |
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$this->cookiesConfig = $cookiesConfig; |
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$this->factory = $factory; |
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$this->scope = $scope; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function process(Request $request, Handler $handler): Response |
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{ |
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//Initiating session, this can only be done once! |
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$session = $this->factory->initSession( |
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$this->clientSignature($request), |
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$this->fetchID($request) |
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); |
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try { |
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$response = $handler->handle($request->withAttribute(static::ATTRIBUTE, $session)); |
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} catch (\Throwable $e) { |
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$session->abort(); |
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throw $e; |
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} |
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return $this->commitSession($session, $request, $response); |
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} |
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/** |
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* @param SessionInterface $session |
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* @param Request $request |
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* @param Response $response |
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* @return Response |
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*/ |
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protected function commitSession( |
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SessionInterface $session, |
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Request $request, |
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Response $response |
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): Response { |
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if (!$session->isStarted()) { |
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return $response; |
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} |
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$session->commit(); |
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//SID changed |
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if ($this->fetchID($request) != $session->getID()) { |
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return $this->withCookie($request, $response, $session->getID()); |
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} |
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//Nothing to do |
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return $response; |
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} |
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/** |
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* Attempt to locate session ID in request. |
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* |
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* @param Request $request |
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* @return string|null |
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*/ |
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protected function fetchID(Request $request): ?string |
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{ |
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$cookies = $request->getCookieParams(); |
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if (empty($cookies[$this->config->getCookie()])) { |
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return null; |
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} |
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return $cookies[$this->config->getCookie()]; |
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} |
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/** |
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* @param Request $request |
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* @param Response $response |
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* @param string $id |
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* @return Response |
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*/ |
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protected function withCookie(Request $request, Response $response, string $id = null): Response |
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{ |
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$response = $response->withAddedHeader( |
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'Set-Cookie', |
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$this->sessionCookie($request->getUri(), $id)->createHeader() |
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); |
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return $response; |
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} |
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/** |
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* Must return string which identifies client on other end. Not for security check but for |
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* session fixation. |
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* |
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* @param Request $request |
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* @return string |
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*/ |
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protected function clientSignature(Request $request): string |
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{ |
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$signature = ''; |
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foreach (static::SIGNATURE_HEADERS as $header) { |
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$signature .= $request->getHeaderLine($header) . ';'; |
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} |
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return hash('sha256', $signature); |
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} |
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/** |
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* Generate session cookie. |
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* |
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* @param UriInterface $uri Incoming uri. |
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* @param string|null $id |
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* @return Cookie |
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*/ |
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private function sessionCookie(UriInterface $uri, string $id = null): Cookie |
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{ |
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return Cookie::create( |
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$this->config->getCookie(), |
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$id, |
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$this->config->getLifetime(), |
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$this->httpConfig->getBasePath(), |
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$this->cookiesConfig->resolveDomain($uri), |
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$this->config->isSecure(), |
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true |
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); |
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} |
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} |
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spiral /
framework
