[Summary view] [Print] [Text view]

   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