1 | <?php |
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2 | |
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3 | /* |
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4 | * This file is part of the Assetic package, an OpenSky project. |
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5 | * |
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6 | * (c) 2010-2012 OpenSky Project Inc |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |
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12 | namespace Assetic\Asset; |
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13 | |
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14 | use Assetic\Util\PathUtils; |
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15 | |
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16 | use Assetic\Filter\FilterInterface; |
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17 | |
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18 | /** |
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19 | * Represents an asset loaded via an HTTP request. |
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20 | * |
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21 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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22 | */ |
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23 | class HttpAsset extends BaseAsset |
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24 | { |
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25 | private $sourceUrl; |
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26 | private $ignoreErrors; |
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27 | |
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28 | /** |
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29 | * Constructor. |
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30 | * |
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31 | * @param string $sourceUrl The source URL |
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32 | * @param array $filters An array of filters |
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33 | * @param Boolean $ignoreErrors |
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34 | * @param array $vars |
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35 | * |
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36 | * @throws \InvalidArgumentException If the first argument is not an URL |
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37 | */ |
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38 | public function __construct($sourceUrl, $filters = array(), $ignoreErrors = false, array $vars = array()) |
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39 | { |
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40 | if (0 === strpos($sourceUrl, '//')) { |
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41 | $sourceUrl = 'http:'.$sourceUrl; |
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42 | } elseif (false === strpos($sourceUrl, '://')) { |
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43 | throw new \InvalidArgumentException(sprintf('"%s" is not a valid URL.', $sourceUrl)); |
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44 | } |
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45 | |
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46 | $this->sourceUrl = $sourceUrl; |
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47 | $this->ignoreErrors = $ignoreErrors; |
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48 | |
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49 | list($scheme, $url) = explode('://', $sourceUrl, 2); |
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50 | list($host, $path) = explode('/', $url, 2); |
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51 | |
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52 | parent::__construct($filters, $scheme.'://'.$host, $path, $vars); |
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53 | } |
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54 | |
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55 | public function load(FilterInterface $additionalFilter = null) |
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56 | { |
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57 | if (false === $content = @file_get_contents(PathUtils::resolvePath( |
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58 | $this->sourceUrl, $this->getVars(), $this->getValues())) |
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59 | ) { |
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60 | if ($this->ignoreErrors) { |
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61 | return; |
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62 | } |
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63 | |
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64 | throw new \RuntimeException(sprintf('Unable to load asset from URL "%s"', $this->sourceUrl)); |
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65 | } |
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66 | |
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67 | $this->doLoad($content, $additionalFilter); |
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68 | } |
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69 | |
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70 | public function getLastModified() |
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71 | { |
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72 | if (false !== @file_get_contents($this->sourceUrl, false, stream_context_create(array('http' => array('method' => 'HEAD'))))) { |
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73 | foreach ($http_response_header as $header) { |
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74 | if (0 === stripos($header, 'Last-Modified: ')) { |
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75 | list(, $mtime) = explode(':', $header, 2); |
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76 | |
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77 | return strtotime(trim($mtime)); |
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78 | } |
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79 | } |
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80 | } |
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81 | } |
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82 | } |
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