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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\Fragment;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Controller\ControllerReference;
use Symfony\Component\HttpKernel\HttpCache\Esi;
/**
* Implements the ESI rendering strategy.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class EsiFragmentRenderer extends RoutableFragmentRenderer
{
private $esi;
private $inlineStrategy;
/**
* Constructor.
*
* The "fallback" strategy when ESI is not available should always be an
* instance of InlineFragmentRenderer.
*
* @param Esi $esi An Esi instance
* @param InlineFragmentRenderer $inlineStrategy The inline strategy to use when ESI is not supported
*/
public function __construct(Esi $esi = null, InlineFragmentRenderer $inlineStrategy)
{
$this->esi = $esi;
$this->inlineStrategy = $inlineStrategy;
}
/**
* {@inheritdoc}
*
* Note that if the current Request has no ESI capability, this method
* falls back to use the inline rendering strategy.
*
* Additional available options:
*
* * alt: an alternative URI to render in case of an error
* * comment: a comment to add when returning an esi:include tag
*
* @see Symfony\Component\HttpKernel\HttpCache\ESI
*/
public function render($uri, Request $request, array $options = array())
{
if (!$this->esi || !$this->esi->hasSurrogateEsiCapability($request)) {
return $this->inlineStrategy->render($uri, $request, $options);
}
if ($uri instanceof ControllerReference) {
$uri = $this->generateFragmentUri($uri, $request);
}
$alt = isset($options['alt']) ? $options['alt'] : null;
if ($alt instanceof ControllerReference) {
$alt = $this->generateFragmentUri($alt, $request);
}
$tag = $this->esi->renderIncludeTag($uri, $alt, isset($options['ignore_errors']) ? $options['ignore_errors'] : false, isset($options['comment']) ? $options['comment'] : '');
return new Response($tag);
}
/**
* {@inheritdoc}
*/
public function getName()
{
return 'esi';
}
}