library/HTMLPurifier/AttrDef/Host.php

   1 <?php
   2
   3 require_once 'HTMLPurifier/AttrDef.php';
   4 require_once 'HTMLPurifier/AttrDef/IPv4.php';
   5 require_once 'HTMLPurifier/AttrDef/IPv6.php';
   6
   7 class HTMLPurifier_AttrDef_Host extends HTMLPurifier_AttrDef
   8 {
   9
  10     var $ipv4, $ipv6;
  11
  12     function HTMLPurifier_AttrDef_Host() {
  13         $this->ipv4 = new HTMLPurifier_AttrDef_IPv4();
  14         $this->ipv6 = new HTMLPurifier_AttrDef_IPv6();
  15     }
  16
  17     function validate($string, $config, &$context) {
  18         $length = strlen($string);
  19         if ($string === '') return '';
  20         if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
  21             //IPv6
  22             $ip = substr($string, 1, $length - 2);
  23             $valid = $this->ipv6->validate($ip, $config, $context);
  24             if ($valid === false) return false;
  25             return '['. $valid . ']';
  26         }
  27         $ipv4 = $this->ipv4->validate($string, $config, $context);
  28         if ($ipv4 !== false) return $ipv4;
  29
  30         // validate a domain name here, do filtering, etc etc etc
  31
  32         // We could use this, but it would break I18N domain names
  33         //$match = preg_match('/^[a-z0-9][\w\-\.]*[a-z0-9]$/i', $string);
  34         //if (!$match) return false;
  35
  36         return $string;
  37     }
  38
  39 }
  40
  41 ?>