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<?php
namespace DuplicatorPro\Aws\S3;
defined("ABSPATH") or die("");
use DuplicatorPro\Guzzle\Http\Exception\HttpException;
use DuplicatorPro\Guzzle\Http\Message\RequestInterface;
use DuplicatorPro\Guzzle\Http\Message\EntityEnclosingRequestInterface;
use DuplicatorPro\Guzzle\Http\Message\Response;
use DuplicatorPro\Guzzle\Plugin\Backoff\BackoffStrategyInterface;
use DuplicatorPro\Guzzle\Plugin\Backoff\AbstractBackoffStrategy;
/**
* Retries CompleteMultipartUpload requests in the case of failure.
*
* From the S3 API Documentation:
*
* Processing of a Complete Multipart Upload request could take several
* minutes to complete. After Amazon S3 begins processing the request, it
* sends an HTTP response header that specifies a 200 OK response. While
* processing is in progress, Amazon S3 periodically sends whitespace
* characters to keep the connection from timing out. Because a request
* could fail after the initial 200 OK response has been sent, it is
* important that you check the response body to determine whether the
* request succeeded. Note that if Complete Multipart Upload fails,
* applications should be prepared to retry the failed requests.
*/
class IncompleteMultipartUploadChecker extends AbstractBackoffStrategy
{
public function __construct(BackoffStrategyInterface $next = null)
{
if ($next) {
$this->setNext($next);
}
}
public function makesDecision()
{
return true;
}
protected function getDelay(
$retries,
RequestInterface $request,
Response $response = null,
HttpException $e = null
) {
if ($response && $request->getMethod() === 'POST'
&& $request instanceof EntityEnclosingRequestInterface
&& $response->getStatusCode() == 200
&& strpos($request->getBody(), '<CompleteMultipartUpload xmlns') !== false
&& strpos($response->getBody(), '<CompleteMultipartUploadResult xmlns') === false
) {
return true;
}
}
}