HttpAsset.php
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<?php
/*
* This file is part of the Assetic package, an OpenSky project.
*
* (c) 2010-2014 OpenSky Project Inc
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Assetic\Asset;
use Assetic\Filter\FilterInterface;
use Assetic\Util\VarUtils;
/**
* Represents an asset loaded via an HTTP request.
*
* @author Kris Wallsmith <kris.wallsmith@gmail.com>
*/
class HttpAsset extends BaseAsset
{
private $sourceUrl;
private $ignoreErrors;
/**
* Constructor.
*
* @param string $sourceUrl The source URL
* @param array $filters An array of filters
* @param Boolean $ignoreErrors
* @param array $vars
*
* @throws \InvalidArgumentException If the first argument is not an URL
*/
public function __construct($sourceUrl, $filters = array(), $ignoreErrors = false, array $vars = array())
{
if (0 === strpos($sourceUrl, '//')) {
$sourceUrl = 'http:'.$sourceUrl;
} elseif (false === strpos($sourceUrl, '://')) {
throw new \InvalidArgumentException(sprintf('"%s" is not a valid URL.', $sourceUrl));
}
$this->sourceUrl = $sourceUrl;
$this->ignoreErrors = $ignoreErrors;
list($scheme, $url) = explode('://', $sourceUrl, 2);
list($host, $path) = explode('/', $url, 2);
parent::__construct($filters, $scheme.'://'.$host, $path, $vars);
}
public function load(FilterInterface $additionalFilter = null)
{
$content = @file_get_contents(
VarUtils::resolve($this->sourceUrl, $this->getVars(), $this->getValues())
);
if (false === $content && !$this->ignoreErrors) {
throw new \RuntimeException(sprintf('Unable to load asset from URL "%s"', $this->sourceUrl));
}
$this->doLoad($content, $additionalFilter);
}
public function getLastModified()
{
if (false !== @file_get_contents($this->sourceUrl, false, stream_context_create(array('http' => array('method' => 'HEAD'))))) {
foreach ($http_response_header as $header) {
if (0 === stripos($header, 'Last-Modified: ')) {
list(, $mtime) = explode(':', $header, 2);
return strtotime(trim($mtime));
}
}
}
}
}