mirror of
https://github.com/renbaoshuo/S2OJ.git
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96d4a3ecf7
Due to historical reasons, the code is in subfolder "1". With SVN removal, we place the code back and remove the annoying "1" folder.
53 lines
1.3 KiB
PHP
53 lines
1.3 KiB
PHP
<?php
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// must be called POST validation
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/**
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* Adds rel="nofollow" to all outbound links. This transform is
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* only attached if Attr.Nofollow is TRUE.
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*/
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class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
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{
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/**
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* @type HTMLPurifier_URIParser
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*/
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private $parser;
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public function __construct()
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{
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$this->parser = new HTMLPurifier_URIParser();
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}
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/**
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* @param array $attr
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return array
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*/
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public function transform($attr, $config, $context)
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{
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if (!isset($attr['href'])) {
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return $attr;
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}
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// XXX Kind of inefficient
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$url = $this->parser->parse($attr['href']);
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$scheme = $url->getSchemeObj($config, $context);
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if ($scheme->browsable && !$url->isLocal($config, $context)) {
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if (isset($attr['rel'])) {
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$rels = explode(' ', $attr['rel']);
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if (!in_array('nofollow', $rels)) {
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$rels[] = 'nofollow';
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}
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$attr['rel'] = implode(' ', $rels);
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} else {
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$attr['rel'] = 'nofollow';
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}
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}
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return $attr;
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}
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}
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// vim: et sw=4 sts=4
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