1 <?php

     2 

     3 /*

     4  * This file is part of the Assetic package, an OpenSky project.

     5  *

     6  * (c) 2010-2011 OpenSky Project Inc

     7  *

     8  * For the full copyright and license information, please view the LICENSE

     9  * file that was distributed with this source code.

    10  */

    11 

    12 namespace Assetic\Asset;

    13 

    14 use Assetic\Filter\FilterInterface;

    15 

    16 /**

    17  * Represents an asset loaded via an HTTP request.

    18  *

    19  * @author Kris Wallsmith <kris.wallsmith@gmail.com>

    20  */

    21 class HttpAsset extends BaseAsset

    22 {

    23     private $sourceUrl;

    24     private $ignoreErrors;

    25 

    26     /**

    27      * Constructor.

    28      *

    29      * @param string $sourceUrl The source URL

    30      * @param array  $filters   An array of filters

    31      *

    32      * @throws InvalidArgumentException If the first argument is not an URL

    33      */

    34     public function __construct($sourceUrl, $filters = array(), $ignoreErrors = false)

    35     {

    36         if (0 === strpos($sourceUrl, '//')) {

    37             $sourceUrl = 'http:'.$sourceUrl;

    38         } elseif (false === strpos($sourceUrl, '://')) {

    39             throw new \InvalidArgumentException(sprintf('"%s" is not a valid URL.', $sourceUrl));

    40         }

    41 

    42         $this->sourceUrl = $sourceUrl;

    43         $this->ignoreErrors = $ignoreErrors;

    44 

    45         list($scheme, $url) = explode('://', $sourceUrl, 2);

    46         list($host, $path) = explode('/', $url, 2);

    47 

    48         parent::__construct($filters, $scheme.'://'.$host, $path);

    49     }

    50 

    51     public function load(FilterInterface $additionalFilter = null)

    52     {

    53         if (false === $content = @file_get_contents($this->sourceUrl)) {

    54             if ($this->ignoreErrors) {

    55                 return;

    56             } else {

    57                 throw new \RuntimeException(sprintf('Unable to load asset from URL "%s"', $this->sourceUrl));

    58             }

    59         }

    60 

    61         $this->doLoad($content, $additionalFilter);

    62     }

    63 

    64     public function getLastModified()

    65     {

    66         if (false !== @file_get_contents($this->sourceUrl, false, stream_context_create(array('http' => array('method' => 'HEAD'))))) {

    67             foreach ($http_response_header as $header) {

    68                 if (0 === stripos($header, 'Last-Modified: ')) {

    69                     list(, $mtime) = explode(':', $header, 2);

    70 

    71                     return strtotime(trim($mtime));

    72                 }

    73             }

    74         }

    75     }

    76 }