HttpBackoffStrategy.php

<?php
 
namespace Guzzle\Plugin\Backoff;
 
use Guzzle\Http\Message\RequestInterface;
use Guzzle\Http\Message\Response;
use Guzzle\Http\Exception\HttpException;
 
class HttpBackoffStrategy extends AbstractErrorCodeBackoffStrategy
{
    protected static $defaultErrorCodes = array(500, 503);
 
    protected function getDelay($retries, RequestInterface $request, Response $response = null, HttpException $e = null)
    {
        if ($response) {
            //Short circuit the rest of the checks if it was successful
            if ($response->isSuccessful()) {
                return false;
            } else {
                return isset($this->errorCodes[$response->getStatusCode()]) ? true : null;
            }
        }
    }
}