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<?php |
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/** |
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* This file is part of graze/gigya-client |
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* |
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* Copyright (c) 2016 Nature Delivered Ltd. <https://www.graze.com> |
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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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* @license https://github.com/graze/gigya-client/blob/master/LICENSE.md |
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* @link https://github.com/graze/gigya-client |
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*/ |
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namespace Graze\Gigya\Auth\OAuth2; |
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use Closure; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface as GuzzleResponseInterface; |
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class OAuth2Middleware |
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{ |
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const AUTH_NAME = 'gigya-oauth2'; |
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/** @var GrantInterface */ |
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private $grant; |
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/** @var string|null */ |
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private $name; |
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/** |
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* @var callable |
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*/ |
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private $nextHandler; |
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/** |
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* @param callable $nextHandler |
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* @param GrantInterface $grant |
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* @param string|null $name |
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*/ |
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public function __construct(callable $nextHandler, GrantInterface $grant, $name = null) |
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{ |
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$this->nextHandler = $nextHandler; |
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$this->grant = $grant; |
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$this->name = $name ?: static::AUTH_NAME; |
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} |
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/** |
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* @param RequestInterface $request |
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* @param array $options |
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* |
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* @return mixed |
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*/ |
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public function __invoke(RequestInterface $request, array $options) |
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{ |
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if ($request->getUri()->getScheme() == 'https' && $options['auth'] == $this->name) { |
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$token = $this->grant->getToken(); |
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if (!is_null($token)) { |
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$request = $request->withHeader('Authorization', sprintf('OAuth %s', $token->getToken())); |
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} |
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} |
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$fn = $this->nextHandler; |
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return $fn($request, $options) |
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->then($this->refreshToken($request, $options)); |
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} |
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/** |
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* @param RequestInterface $request |
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* @param array $options |
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* |
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* @return Closure A function taking a response and returning a new response|future |
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*/ |
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private function refreshToken(RequestInterface $request, array $options) |
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{ |
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/** |
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* Take a response and if it requires authentication, retry the request. Otherwise pass through the response |
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* |
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* @param GuzzleResponseInterface $response |
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* |
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* @return GuzzleResponseInterface |
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*/ |
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return function (GuzzleResponseInterface $response) use ($request, $options) { |
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if ($response->getStatusCode() == 401 |
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&& $this->canRetry($request, $options)) { |
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if (!is_null($this->grant->getToken())) { |
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$options['retries'] = (isset($options['retries'])) ? $options['retries'] + 1 : 1; |
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return $this($request, $options); |
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} |
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} |
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return $response; |
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}; |
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} |
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/** |
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* @param RequestInterface $request |
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* @param array $options |
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* |
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* @return bool |
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*/ |
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private function canRetry(RequestInterface $request, array $options) |
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{ |
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return ($request->getUri()->getScheme() == 'https' |
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&& $options['auth'] == $this->name |
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&& (!isset($options['retries']) || $options['retries'] === 0)); |
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} |
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/** |
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* Return a middleware handler function for OAuth2 Authentication |
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* |
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* @param GrantInterface $grant |
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* @param string|null $name |
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* |
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* @return Closure |
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*/ |
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public static function middleware(GrantInterface $grant, $name = null) |
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{ |
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return function (callable $handler) use ($grant, $name) { |
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return new static($handler, $grant, $name); |
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}; |
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} |
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} |
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graze /
gigya-client
