library/HTMLPurifier/URIDefinition.php

   1 <?php
   2
   3 class HTMLPurifier_URIDefinition extends HTMLPurifier_Definition
   4 {
   5
   6     public $type = 'URI';
   7     protected $filters = array();
   8     protected $postFilters = array();
   9     protected $registeredFilters = array();
  10
  11     /**
  12      * HTMLPurifier_URI object of the base specified at %URI.Base
  13      */
  14     public $base;
  15
  16     /**
  17      * String host to consider "home" base, derived off of $base
  18      */
  19     public $host;
  20
  21     /**
  22      * Name of default scheme based on %URI.DefaultScheme and %URI.Base
  23      */
  24     public $defaultScheme;
  25
  26     public function __construct() {
  27         $this->registerFilter(new HTMLPurifier_URIFilter_DisableExternal());
  28         $this->registerFilter(new HTMLPurifier_URIFilter_DisableExternalResources());
  29         $this->registerFilter(new HTMLPurifier_URIFilter_HostBlacklist());
  30         $this->registerFilter(new HTMLPurifier_URIFilter_MakeAbsolute());
  31         $this->registerFilter(new HTMLPurifier_URIFilter_Munge());
  32     }
  33
  34     public function registerFilter($filter) {
  35         $this->registeredFilters[$filter->name] = $filter;
  36     }
  37
  38     public function addFilter($filter, $config) {
  39         $r = $filter->prepare($config);
  40         if ($r === false) return; // null is ok, for backwards compat
  41         if ($filter->post) {
  42             $this->postFilters[$filter->name] = $filter;
  43         } else {
  44             $this->filters[$filter->name] = $filter;
  45         }
  46     }
  47
  48     protected function doSetup($config) {
  49         $this->setupMemberVariables($config);
  50         $this->setupFilters($config);
  51     }
  52
  53     protected function setupFilters($config) {
  54         foreach ($this->registeredFilters as $name => $filter) {
  55             $conf = $config->get('URI.' . $name);
  56             if ($conf !== false && $conf !== null) {
  57                 $this->addFilter($filter, $config);
  58             }
  59         }
  60         unset($this->registeredFilters);
  61     }
  62
  63     protected function setupMemberVariables($config) {
  64         $this->host = $config->get('URI.Host');
  65         $base_uri = $config->get('URI.Base');
  66         if (!is_null($base_uri)) {
  67             $parser = new HTMLPurifier_URIParser();
  68             $this->base = $parser->parse($base_uri);
  69             $this->defaultScheme = $this->base->scheme;
  70             if (is_null($this->host)) $this->host = $this->base->host;
  71         }
  72         if (is_null($this->defaultScheme)) $this->defaultScheme = $config->get('URI.DefaultScheme');
  73     }
  74
  75     public function filter(&$uri, $config, $context) {
  76         foreach ($this->filters as $name => $f) {
  77             $result = $f->filter($uri, $config, $context);
  78             if (!$result) return false;
  79         }
  80         return true;
  81     }
  82
  83     public function postFilter(&$uri, $config, $context) {
  84         foreach ($this->postFilters as $name => $f) {
  85             $result = $f->filter($uri, $config, $context);
  86             if (!$result) return false;
  87         }
  88         return true;
  89     }
  90
  91 }
  92
  93 // vim: et sw=4 sts=4