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   1  <?php
   2  
   3  /**
   4   * Validates ftp (File Transfer Protocol) URIs as defined by generic RFC 1738.
   5   */
   6  class HTMLPurifier_URIScheme_ftp extends HTMLPurifier_URIScheme {
   7  
   8      public $default_port = 21;
   9      public $browsable = true; // usually
  10      public $hierarchical = true;
  11  
  12      public function validate(&$uri, $config, $context) {
  13          parent::validate($uri, $config, $context);
  14          $uri->query    = null;
  15  
  16          // typecode check
  17          $semicolon_pos = strrpos($uri->path, ';'); // reverse
  18          if ($semicolon_pos !== false) {
  19              $type = substr($uri->path, $semicolon_pos + 1); // no semicolon
  20              $uri->path = substr($uri->path, 0, $semicolon_pos);
  21              $type_ret = '';
  22              if (strpos($type, '=') !== false) {
  23                  // figure out whether or not the declaration is correct
  24                  list($key, $typecode) = explode('=', $type, 2);
  25                  if ($key !== 'type') {
  26                      // invalid key, tack it back on encoded
  27                      $uri->path .= '%3B' . $type;
  28                  } elseif ($typecode === 'a' || $typecode === 'i' || $typecode === 'd') {
  29                      $type_ret = ";type=$typecode";
  30                  }
  31              } else {
  32                  $uri->path .= '%3B' . $type;
  33              }
  34              $uri->path = str_replace(';', '%3B', $uri->path);
  35              $uri->path .= $type_ret;
  36          }
  37  
  38          return true;
  39      }
  40  
  41  }
  42  
  43  // vim: et sw=4 sts=4