wp-includes/class-feed.php

   1 <?php
   2
   3 if ( ! class_exists( 'SimplePie', false ) )
   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          * @param string $location  URL location (scheme is used to determine handler).
  14          * @param string $filename  Unique identifier for cache object.
  15          * @param string $extension 'spi' or 'spc'.
  16          * @return WP_Feed_Cache_Transient Feed cache handler object that uses transients.
  17          */
  18         public function create($location, $filename, $extension) {
  19                 return new WP_Feed_Cache_Transient($location, $filename, $extension);
  20         }
  21 }
  22
  23 class WP_Feed_Cache_Transient {
  24         public $name;
  25         public $mod_name;
  26         public $lifetime = 43200; //Default lifetime in cache of 12 hours
  27
  28         /**
  29          * Class instantiator.
  30          *
  31          * @param string $location  URL location (scheme is used to determine handler).
  32          * @param string $filename  Unique identifier for cache object.
  33          * @param string $extension 'spi' or 'spc'.
  34          */
  35         public function __construct($location, $filename, $extension) {
  36                 $this->name = 'feed_' . $filename;
  37                 $this->mod_name = 'feed_mod_' . $filename;
  38
  39                 $lifetime = $this->lifetime;
  40                 /**
  41                  * Filter the transient lifetime of the feed cache.
  42                  *
  43                  * @since 2.8.0
  44                  *
  45                  * @param int    $lifetime Cache duration in seconds. Default is 43200 seconds (12 hours).
  46                  * @param string $filename Unique identifier for the cache object.
  47                  */
  48                 $this->lifetime = apply_filters( 'wp_feed_cache_transient_lifetime', $lifetime, $filename);
  49         }
  50
  51         /**
  52          * @access public
  53          *
  54          * @param SimplePie $data Data to save.
  55          * @return true Always true.
  56          */
  57         public function save($data) {
  58                 if ( $data instanceof SimplePie ) {
  59                         $data = $data->data;
  60                 }
  61
  62                 set_transient($this->name, $data, $this->lifetime);
  63                 set_transient($this->mod_name, time(), $this->lifetime);
  64                 return true;
  65         }
  66
  67         /**
  68          * @access public
  69          */
  70         public function load() {
  71                 return get_transient($this->name);
  72         }
  73
  74         /**
  75          * @access public
  76          */
  77         public function mtime() {
  78                 return get_transient($this->mod_name);
  79         }
  80
  81         /**
  82          * @access public
  83          */
  84         public function touch() {
  85                 return set_transient($this->mod_name, time(), $this->lifetime);
  86         }
  87
  88         /**
  89          * @access public
  90          */
  91         public function unlink() {
  92                 delete_transient($this->name);
  93                 delete_transient($this->mod_name);
  94                 return true;
  95         }
  96 }
  97
  98 class WP_SimplePie_File extends SimplePie_File {
  99
 100         public function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false) {
 101                 $this->url = $url;
 102                 $this->timeout = $timeout;
 103                 $this->redirects = $redirects;
 104                 $this->headers = $headers;
 105                 $this->useragent = $useragent;
 106
 107                 $this->method = SIMPLEPIE_FILE_SOURCE_REMOTE;
 108
 109                 if ( preg_match('/^http(s)?:\/\//i', $url) ) {
 110                         $args = array(
 111                                 'timeout' => $this->timeout,
 112                                 'redirection' => $this->redirects,
 113                         );
 114
 115                         if ( !empty($this->headers) )
 116                                 $args['headers'] = $this->headers;
 117
 118                         if ( SIMPLEPIE_USERAGENT != $this->useragent ) //Use default WP user agent unless custom has been specified
 119                                 $args['user-agent'] = $this->useragent;
 120
 121                         $res = wp_safe_remote_request($url, $args);
 122
 123                         if ( is_wp_error($res) ) {
 124                                 $this->error = 'WP HTTP Error: ' . $res->get_error_message();
 125                                 $this->success = false;
 126                         } else {
 127                                 $this->headers = wp_remote_retrieve_headers( $res );
 128                                 $this->body = wp_remote_retrieve_body( $res );
 129                                 $this->status_code = wp_remote_retrieve_response_code( $res );
 130                         }
 131                 } else {
 132                         $this->error = '';
 133                         $this->success = false;
 134                 }
 135         }
 136 }
 137
 138 /**
 139  * WordPress SimplePie Sanitization Class
 140  *
 141  * Extension of the SimplePie_Sanitize class to use KSES, because
 142  * we cannot universally count on DOMDocument being available
 143  *
 144  * @package WordPress
 145  * @since 3.5.0
 146  */
 147 class WP_SimplePie_Sanitize_KSES extends SimplePie_Sanitize {
 148         public function sanitize( $data, $type, $base = '' ) {
 149                 $data = trim( $data );
 150                 if ( $type & SIMPLEPIE_CONSTRUCT_MAYBE_HTML ) {
 151                         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)) {
 152                                 $type |= SIMPLEPIE_CONSTRUCT_HTML;
 153                         }
 154                         else {
 155                                 $type |= SIMPLEPIE_CONSTRUCT_TEXT;
 156                         }
 157                 }
 158                 if ( $type & SIMPLEPIE_CONSTRUCT_BASE64 ) {
 159                         $data = base64_decode( $data );
 160                 }
 161                 if ( $type & ( SIMPLEPIE_CONSTRUCT_HTML | SIMPLEPIE_CONSTRUCT_XHTML ) ) {
 162                         $data = wp_kses_post( $data );
 163                         if ( $this->output_encoding !== 'UTF-8' ) {
 164                                 $data = $this->registry->call( 'Misc', 'change_encoding', array( $data, 'UTF-8', $this->output_encoding ) );
 165                         }
 166                         return $data;
 167                 } else {
 168                         return parent::sanitize( $data, $type, $base );
 169                 }
 170         }
 171 }