/**
* Filters HTML source for invalid constructs and forbidden items such as XSS scripts
* @param string $html HTML to be filtered
* @return string Filtered HTML
*/
static function purifyHTML($html) {
//correct absolute links and make them relative
if (!MediabirdConfig::$disable_absolute_link_correction) {
$html = self::correctAbsoluteLinks($html);
}
if(class_exists("HTMLPurifier",false)) {
if(!isset(self::$_purifier)) {
$config = HTMLPurifier_Config::createDefault();
$config->set('Attr', 'EnableID', true);
$config->set('CSS', 'AllowedProperties', array(
'font-weight','font-style','text-align','text-decoration', //support text formatting
'float', //support image float
'width','height', //support image size
'padding','padding-top','padding-right','padding-bottom','padding-left', //support image padding
'margin','margin-left' //support indendation
//'direction' //support RTL/LTR
));
if(isset(MediabirdConfig::$cache_folder)) {
$cachePath=MediabirdConfig::$cache_folder."filter";
if(!file_exists($cachePath)) {
mkdir($cachePath);
}
$config->set('Cache', 'SerializerPath', $cachePath);
}
$config->set('HTML', 'Doctype', 'HTML 4.01 Strict');
self::$_purifier = new HTMLPurifier($config);
}
return self::$_purifier->purify($html);
}
else {
return $html;
}
}