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<?php
/* Icinga Web 2 | (c) 2018 Icinga Development Team | GPLv2+ */
namespace Icinga\Web\Helper;
use Closure;
use Icinga\Web\FileCache;
use InvalidArgumentException;
class HtmlPurifier
{
/**
* The actual purifier instance
*
* @var \HTMLPurifier
*/
protected $purifier;
/**
* Create a new HtmlPurifier
*
* @param array|Closure $config Additional configuration
*/
public function __construct($config = null)
{
$purifierConfig = \HTMLPurifier_Config::createDefault();
$purifierConfig->set('Core.EscapeNonASCIICharacters', true);
$purifierConfig->set('Attr.AllowedFrameTargets', array('_blank'));
if (($cachePath = FileCache::instance()->directory('htmlpurifier.cache')) !== false) {
$purifierConfig->set('Cache.SerializerPath', $cachePath);
} else {
$purifierConfig->set('Cache.DefinitionImpl', null);
}
// This avoids permission problems:
// $purifierConfig->set('Core.DefinitionCache', null);
// $purifierConfig->set('URI.Base', 'http://www.example.com');
// $purifierConfig->set('URI.MakeAbsolute', true);
$this->configure($purifierConfig);
if ($config instanceof Closure) {
call_user_func($config, $purifierConfig);
} elseif (is_array($config)) {
$purifierConfig->loadArray($config);
} elseif ($config !== null) {
throw new InvalidArgumentException('$config must be either a Closure or array');
}
$this->purifier = new \HTMLPurifier($purifierConfig);
}
/**
* Apply additional default configuration
*
* May be overwritten by more concrete purifier implementations.
*
* @param \HTMLPurifier_Config $config
*/
protected function configure($config)
{
}
/**
* Purify and return the given HTML string
*
* @param string $html
* @param array|Closure $config Configuration to use instead of the default
*
* @return string
*/
public function purify($html, $config = null)
{
return $this->purifier->purify($html, $config);
}
/**
* Purify and return the given HTML string
*
* Convenience method to bypass object creation.
*
* @param string $html
* @param array|Closure $config Additional configuration
*
* @return string
*/
public static function process($html, $config = null)
{
$purifier = new static($config);
return $purifier->purify($html);
}
}
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