mirror of
https://github.com/ezyang/htmlpurifier.git
synced 2024-11-10 07:38:41 +00:00
42 lines
941 B
PHP
42 lines
941 B
PHP
<?php
|
|
|
|
// must be called POST validation
|
|
|
|
/**
|
|
* Adds rel="nofollow" to all outbound links. This transform is
|
|
* only attached if Attr.Nofollow is TRUE.
|
|
*/
|
|
class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
|
|
{
|
|
private $parser;
|
|
|
|
public function __construct() {
|
|
$this->parser = new HTMLPurifier_URIParser();
|
|
}
|
|
|
|
public function transform($attr, $config, $context) {
|
|
|
|
if (!isset($attr['href'])) {
|
|
return $attr;
|
|
}
|
|
|
|
// XXX Kind of inefficient
|
|
$url = $this->parser->parse($attr['href']);
|
|
$scheme = $url->getSchemeObj($config, $context);
|
|
|
|
if (!is_null($url->host) && $scheme !== false && $scheme->browsable) {
|
|
if (isset($attr['rel'])) {
|
|
$attr['rel'] .= ' nofollow';
|
|
} else {
|
|
$attr['rel'] = 'nofollow';
|
|
}
|
|
}
|
|
|
|
return $attr;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// vim: et sw=4 sts=4
|