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AsseticController.php
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AsseticController.php
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<?php
/*
* This file is part of the Symfony framework.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Symfony\Bundle\AsseticBundle\Controller;
use Assetic\Asset\AssetCache;
use Assetic\Asset\AssetInterface;
use Assetic\Cache\CacheInterface;
use Assetic\Factory\LazyAssetManager;
use Assetic\ValueSupplierInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\Profiler\Profiler;
/**
* Serves assets.
*
* @author Kris Wallsmith <kris@symfony.com>
*/
class AsseticController
{
protected $request;
protected $am;
protected $cache;
protected $enableProfiler;
protected $profiler;
public function __construct(LazyAssetManager $am, CacheInterface $cache, $enableProfiler = false, Profiler $profiler = null)
{
$this->am = $am;
$this->cache = $cache;
$this->enableProfiler = (boolean) $enableProfiler;
$this->profiler = $profiler;
}
public function setValueSupplier(ValueSupplierInterface $supplier)
{
trigger_error(sprintf('%s is deprecated. The values of asset variables are retrieved from the request after the route matching.', __METHOD__), E_USER_DEPRECATED);
}
public function render(Request $request, $name, $pos = null)
{
if (!$this->enableProfiler && null !== $this->profiler) {
$this->profiler->disable();
}
if (!$this->am->has($name)) {
throw new NotFoundHttpException(sprintf('The "%s" asset could not be found.', $name));
}
$asset = $this->am->get($name);
if (null !== $pos && !$asset = $this->findAssetLeaf($asset, $pos)) {
throw new NotFoundHttpException(sprintf('The "%s" asset does not include a leaf at position %d.', $name, $pos));
}
$response = $this->createResponse();
$response->setExpires(new \DateTime());
$this->configureAssetValues($asset, $request);
// last-modified
if (null !== $lastModified = $this->am->getLastModified($asset)) {
$date = new \DateTime();
$date->setTimestamp($lastModified);
$response->setLastModified($date);
}
// etag
if ($this->am->hasFormula($name)) {
$formula = $this->am->getFormula($name);
$formula['last_modified'] = $lastModified;
$response->setETag(md5(serialize($formula)));
}
if ($response->isNotModified($request)) {
return $response;
}
$etagCacheKeyFilter = new AssetCacheKeyFilter($response->getEtag());
$response->setContent($this->cachifyAsset($asset)->dump($etagCacheKeyFilter));
return $response;
}
protected function createResponse()
{
return new Response();
}
protected function cachifyAsset(AssetInterface $asset)
{
return new AssetCache($asset, $this->cache);
}
protected function configureAssetValues(AssetInterface $asset, Request $request)
{
if ($vars = $asset->getVars()) {
$asset->setValues(array_intersect_key($request->attributes->all(), array_flip($vars)));
}
return $this;
}
private function findAssetLeaf(\Traversable $asset, $pos)
{
$i = 0;
foreach ($asset as $leaf) {
if ($pos == $i++) {
return $leaf;
}
}
}
}