1 <?php

     2 

     3 /*

     4  * This file is part of the Symfony framework.

     5  *

     6  * (c) Fabien Potencier <fabien@symfony.com>

     7  *

     8  * This source file is subject to the MIT license that is bundled

     9  * with this source code in the file LICENSE.

    10  */

    11 

    12 namespace Symfony\Bundle\AsseticBundle\Controller;

    13 

    14 use Assetic\Asset\AssetCache;

    15 use Assetic\Asset\AssetInterface;

    16 use Assetic\Factory\LazyAssetManager;

    17 use Assetic\Cache\CacheInterface;

    18 use Symfony\Component\HttpFoundation\Request;

    19 use Symfony\Component\HttpFoundation\Response;

    20 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

    21 

    22 /**

    23  * Serves assets.

    24  *

    25  * @author Kris Wallsmith <kris@symfony.com>

    26  */

    27 class AsseticController

    28 {

    29     protected $request;

    30     protected $am;

    31     protected $cache;

    32 

    33     public function __construct(Request $request, LazyAssetManager $am, CacheInterface $cache)

    34     {

    35         $this->request = $request;

    36         $this->am = $am;

    37         $this->cache = $cache;

    38     }

    39 

    40     public function render($name, $pos = null)

    41     {

    42         if (!$this->am->has($name)) {

    43             throw new NotFoundHttpException(sprintf('The "%s" asset could not be found.', $name));

    44         }

    45 

    46         $asset = $this->am->get($name);

    47         if (null !== $pos && !$asset = $this->findAssetLeaf($asset, $pos)) {

    48             throw new NotFoundHttpException(sprintf('The "%s" asset does not include a leaf at position %d.', $name, $pos));

    49         }

    50 

    51         $response = $this->createResponse();

    52 

    53         // last-modified

    54         if (null !== $lastModified = $asset->getLastModified()) {

    55             $date = new \DateTime();

    56             $date->setTimestamp($lastModified);

    57             $response->setLastModified($date);

    58         }

    59 

    60         // etag

    61         if ($this->am->hasFormula($name)) {

    62             $formula = $this->am->getFormula($name);

    63             $formula['last_modified'] = $lastModified;

    64             $response->setETag(md5(serialize($formula)));

    65         }

    66 

    67         if ($response->isNotModified($this->request)) {

    68             return $response;

    69         }

    70 

    71         $response->setContent($this->cachifyAsset($asset)->dump());

    72 

    73         return $response;

    74     }

    75 

    76     protected function createResponse()

    77     {

    78         return new Response();

    79     }

    80 

    81     protected function cachifyAsset(AssetInterface $asset)

    82     {

    83         return new AssetCache($asset, $this->cache);

    84     }

    85 

    86     private function findAssetLeaf(\Traversable $asset, $pos)

    87     {

    88         $i = 0;

    89         foreach ($asset as $leaf) {

    90             if ($pos == $i++) {

    91                 return $leaf;

    92             }

    93         }

    94     }

    95 }