CallbackCanCacheStrategy.php

<?php
 
namespace Guzzle\Plugin\Cache;
 
use Guzzle\Common\Exception\InvalidArgumentException;
use Guzzle\Http\Message\RequestInterface;
use Guzzle\Http\Message\Response;
 
class CallbackCanCacheStrategy extends DefaultCanCacheStrategy
{
    protected $requestCallback;
 
    protected $responseCallback;
 
    public function __construct($requestCallback = null, $responseCallback = null)
    {
        if ($requestCallback && !is_callable($requestCallback)) {
            throw new InvalidArgumentException('Method must be callable');
        }
 
        if ($responseCallback && !is_callable($responseCallback)) {
            throw new InvalidArgumentException('Method must be callable');
        }
 
        $this->requestCallback = $requestCallback;
        $this->responseCallback = $responseCallback;
    }
 
    public function canCacheRequest(RequestInterface $request)
    {
        return $this->requestCallback
            ? call_user_func($this->requestCallback, $request)
            : parent::canCacheRequest($request);
    }
 
    public function canCacheResponse(Response $response)
    {
        return $this->responseCallback
            ? call_user_func($this->responseCallback, $response)
            : parent::canCacheResponse($response);
    }
}