lib/htmlpurifier/HTMLPurifier/AttrDef/URI/Host.php

   1 <?php
   2
   3 require_once 'HTMLPurifier/AttrDef.php';
   4 require_once 'HTMLPurifier/AttrDef/URI/IPv4.php';
   5 require_once 'HTMLPurifier/AttrDef/URI/IPv6.php';
   6
   7 /**
   8  * Validates a host according to the IPv4, IPv6 and DNS (future) specifications.
   9  */
  10 class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef
  11 {
  12
  13     /**
  14      * Instance of HTMLPurifier_AttrDef_URI_IPv4 sub-validator
  15      */
  16     var $ipv4;
  17
  18     /**
  19      * Instance of HTMLPurifier_AttrDef_URI_IPv6 sub-validator
  20      */
  21     var $ipv6;
  22
  23     function HTMLPurifier_AttrDef_URI_Host() {
  24         $this->ipv4 = new HTMLPurifier_AttrDef_URI_IPv4();
  25         $this->ipv6 = new HTMLPurifier_AttrDef_URI_IPv6();
  26     }
  27
  28     function validate($string, $config, &$context) {
  29         $length = strlen($string);
  30         if ($string === '') return '';
  31         if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
  32             //IPv6
  33             $ip = substr($string, 1, $length - 2);
  34             $valid = $this->ipv6->validate($ip, $config, $context);
  35             if ($valid === false) return false;
  36             return '['. $valid . ']';
  37         }
  38
  39         // need to do checks on unusual encodings too
  40         $ipv4 = $this->ipv4->validate($string, $config, $context);
  41         if ($ipv4 !== false) return $ipv4;
  42
  43         // validate a domain name here, do filtering, etc etc etc
  44
  45         // We could use this, but it would break I18N domain names
  46         //$match = preg_match('/^[a-z0-9][\w\-\.]*[a-z0-9]$/i', $string);
  47         //if (!$match) return false;
  48
  49         return $string;
  50     }
  51
  52 }
  53
  54 ?>