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   1  <?php
   2  
   3  if ( !class_exists('SimplePie') )
   4      require_once ( ABSPATH . WPINC . '/class-simplepie.php' );
   5  
   6  class WP_Feed_Cache extends SimplePie_Cache {
   7      /**
   8       * Create a new SimplePie_Cache object
   9       *
  10       * @static
  11       * @access public
  12       */
  13  	function create($location, $filename, $extension) {
  14          return new WP_Feed_Cache_Transient($location, $filename, $extension);
  15      }
  16  }
  17  
  18  class WP_Feed_Cache_Transient {
  19      var $name;
  20      var $mod_name;
  21      var $lifetime = 43200; //Default lifetime in cache of 12 hours
  22  
  23  	function __construct($location, $filename, $extension) {
  24          $this->name = 'feed_' . $filename;
  25          $this->mod_name = 'feed_mod_' . $filename;
  26  
  27          $lifetime = $this->lifetime;
  28          /**
  29           * Filter the transient lifetime of the feed cache.
  30           *
  31           * @since 2.8.0
  32           *
  33           * @param int    $lifetime Cache duration in seconds. Default is 43200 seconds (12 hours).
  34           * @param string $filename Unique identifier for the cache object.
  35           */
  36          $this->lifetime = apply_filters( 'wp_feed_cache_transient_lifetime', $lifetime, $filename);
  37      }
  38  
  39  	function save($data) {
  40          if ( is_a($data, 'SimplePie') )
  41              $data = $data->data;
  42  
  43          set_transient($this->name, $data, $this->lifetime);
  44          set_transient($this->mod_name, time(), $this->lifetime);
  45          return true;
  46      }
  47  
  48  	function load() {
  49          return get_transient($this->name);
  50      }
  51  
  52  	function mtime() {
  53          return get_transient($this->mod_name);
  54      }
  55  
  56  	function touch() {
  57          return set_transient($this->mod_name, time(), $this->lifetime);
  58      }
  59  
  60  	function unlink() {
  61          delete_transient($this->name);
  62          delete_transient($this->mod_name);
  63          return true;
  64      }
  65  }
  66  
  67  class WP_SimplePie_File extends SimplePie_File {
  68  
  69  	function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false) {
  70          $this->url = $url;
  71          $this->timeout = $timeout;
  72          $this->redirects = $redirects;
  73          $this->headers = $headers;
  74          $this->useragent = $useragent;
  75  
  76          $this->method = SIMPLEPIE_FILE_SOURCE_REMOTE;
  77  
  78          if ( preg_match('/^http(s)?:\/\//i', $url) ) {
  79              $args = array(
  80                  'timeout' => $this->timeout,
  81                  'redirection' => $this->redirects,
  82              );
  83  
  84              if ( !empty($this->headers) )
  85                  $args['headers'] = $this->headers;
  86  
  87              if ( SIMPLEPIE_USERAGENT != $this->useragent ) //Use default WP user agent unless custom has been specified
  88                  $args['user-agent'] = $this->useragent;
  89  
  90              $res = wp_safe_remote_request($url, $args);
  91  
  92              if ( is_wp_error($res) ) {
  93                  $this->error = 'WP HTTP Error: ' . $res->get_error_message();
  94                  $this->success = false;
  95              } else {
  96                  $this->headers = wp_remote_retrieve_headers( $res );
  97                  $this->body = wp_remote_retrieve_body( $res );
  98                  $this->status_code = wp_remote_retrieve_response_code( $res );
  99              }
 100          } else {
 101              $this->error = '';
 102              $this->success = false;
 103          }
 104      }
 105  }
 106  
 107  /**
 108   * WordPress SimplePie Sanitization Class
 109   *
 110   * Extension of the SimplePie_Sanitize class to use KSES, because
 111   * we cannot universally count on DOMDocument being available
 112   *
 113   * @package WordPress
 114   * @since 3.5.0
 115   */
 116  class WP_SimplePie_Sanitize_KSES extends SimplePie_Sanitize {
 117  	public function sanitize( $data, $type, $base = '' ) {
 118          $data = trim( $data );
 119          if ( $type & SIMPLEPIE_CONSTRUCT_MAYBE_HTML ) {
 120              if (preg_match('/(&(#(x[0-9a-fA-F]+|[0-9]+)|[a-zA-Z0-9]+)|<\/[A-Za-z][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E]*' . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . '>)/', $data)) {
 121                  $type |= SIMPLEPIE_CONSTRUCT_HTML;
 122              }
 123              else {
 124                  $type |= SIMPLEPIE_CONSTRUCT_TEXT;
 125              }
 126          }
 127          if ( $type & SIMPLEPIE_CONSTRUCT_BASE64 ) {
 128              $data = base64_decode( $data );
 129          }
 130          if ( $type & ( SIMPLEPIE_CONSTRUCT_HTML | SIMPLEPIE_CONSTRUCT_XHTML ) ) {
 131              $data = wp_kses_post( $data );
 132              if ( $this->output_encoding !== 'UTF-8' ) {
 133                  $data = $this->registry->call( 'Misc', 'change_encoding', array( $data, 'UTF-8', $this->output_encoding ) );
 134              }
 135              return $data;
 136          } else {
 137              return parent::sanitize( $data, $type, $base );
 138          }
 139      }
 140  }