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<?php /** * Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. * A copy of the License is located at * * http://aws.amazon.com/apache2.0 * * or in the "license" file accompanying this file. This file is distributed * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either * express or implied. See the License for the specific language governing * permissions and limitations under the License. */ namespace DuplicatorPro\Aws\Common\Client; defined("ABSPATH") or die(""); use DuplicatorPro\Aws\Common\Credentials\AbstractRefreshableCredentials; use DuplicatorPro\Aws\Common\Client\AwsClientInterface; use DuplicatorPro\Aws\Common\Exception\Parser\ExceptionParserInterface; use DuplicatorPro\Guzzle\Http\Exception\HttpException; use DuplicatorPro\Guzzle\Http\Message\RequestInterface; use DuplicatorPro\Guzzle\Http\Message\Response; use DuplicatorPro\Guzzle\Plugin\Backoff\BackoffStrategyInterface; use DuplicatorPro\Guzzle\Plugin\Backoff\AbstractBackoffStrategy; /** * Backoff logic that handles retrying requests when credentials expire */ class ExpiredCredentialsChecker extends AbstractBackoffStrategy { /** * @var array Array of known retrying exception codes */ protected $retryable = array( 'RequestExpired' => true, 'ExpiredTokenException' => true, 'ExpiredToken' => true ); /** * @var ExceptionParserInterface Exception parser used to parse exception responses */ protected $exceptionParser; public function __construct(ExceptionParserInterface $exceptionParser, BackoffStrategyInterface $next = null) { $this->exceptionParser = $exceptionParser; $this->next = $next; } public function makesDecision() { return true; } protected function getDelay($retries, RequestInterface $request, Response $response = null, HttpException $e = null) { if ($response && $response->isClientError()) { $parts = $this->exceptionParser->parse($request, $response); if (!isset($this->retryable[$parts['code']]) || !$request->getClient()) { return null; } /** @var AwsClientInterface $client */ $client = $request->getClient(); // Only retry if the credentials can be refreshed if (!($client->getCredentials() instanceof AbstractRefreshableCredentials)) { return null; } // Resign the request using new credentials $client->getSignature()->signRequest($request, $client->getCredentials()->setExpiration(-1)); // Retry immediately with no delay return 0; } } }