blob: 573b42c9c5a1b73abc09caef1e0bbf79f7e1daa6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
<?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
|
