wp-includes/class-feed.php

   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         public 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         public $name;
  20         public $mod_name;
  21         public $lifetime = 43200; //Default lifetime in cache of 12 hours
  22
  23         public function __construct($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, $filename);
  37         }
  38
  39         public function save($data) {
  40                 if ( $data instanceof SimplePie ) {
  41                         $data = $data->data;
  42                 }
  43
  44                 set_transient($this->name, $data, $this->lifetime);
  45                 set_transient($this->mod_name, time(), $this->lifetime);
  46                 return true;
  47         }
  48
  49         public function load() {
  50                 return get_transient($this->name);
  51         }
  52
  53         public function mtime() {
  54                 return get_transient($this->mod_name);
  55         }
  56
  57         public function touch() {
  58                 return set_transient($this->mod_name, time(), $this->lifetime);
  59         }
  60
  61         public function unlink() {
  62                 delete_transient($this->name);
  63                 delete_transient($this->mod_name);
  64                 return true;
  65         }
  66 }
  67
  68 class WP_SimplePie_File extends SimplePie_File {
  69
  70         public function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false) {
  71                 $this->url = $url;
  72                 $this->timeout = $timeout;
  73                 $this->redirects = $redirects;
  74                 $this->headers = $headers;
  75                 $this->useragent = $useragent;
  76
  77                 $this->method = SIMPLEPIE_FILE_SOURCE_REMOTE;
  78
  79                 if ( preg_match('/^http(s)?:\/\//i', $url) ) {
  80                         $args = array(
  81                                 'timeout' => $this->timeout,
  82                                 'redirection' => $this->redirects,
  83                         );
  84
  85                         if ( !empty($this->headers) )
  86                                 $args['headers'] = $this->headers;
  87
  88                         if ( SIMPLEPIE_USERAGENT != $this->useragent ) //Use default WP user agent unless custom has been specified
  89                                 $args['user-agent'] = $this->useragent;
  90
  91                         $res = wp_safe_remote_request($url, $args);
  92
  93                         if ( is_wp_error($res) ) {
  94                                 $this->error = 'WP HTTP Error: ' . $res->get_error_message();
  95                                 $this->success = false;
  96                         } else {
  97                                 $this->headers = wp_remote_retrieve_headers( $res );
  98                                 $this->body = wp_remote_retrieve_body( $res );
  99                                 $this->status_code = wp_remote_retrieve_response_code( $res );
 100                         }
 101                 } else {
 102                         $this->error = '';
 103                         $this->success = false;
 104                 }
 105         }
 106 }
 107
 108 /**
 109  * WordPress SimplePie Sanitization Class
 110  *
 111  * Extension of the SimplePie_Sanitize class to use KSES, because
 112  * we cannot universally count on DOMDocument being available
 113  *
 114  * @package WordPress
 115  * @since 3.5.0
 116  */
 117 class WP_SimplePie_Sanitize_KSES extends SimplePie_Sanitize {
 118         public function sanitize( $data, $type, $base = '' ) {
 119                 $data = trim( $data );
 120                 if ( $type & SIMPLEPIE_CONSTRUCT_MAYBE_HTML ) {
 121                         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)) {
 122                                 $type |= SIMPLEPIE_CONSTRUCT_HTML;
 123                         }
 124                         else {
 125                                 $type |= SIMPLEPIE_CONSTRUCT_TEXT;
 126                         }
 127                 }
 128                 if ( $type & SIMPLEPIE_CONSTRUCT_BASE64 ) {
 129                         $data = base64_decode( $data );
 130                 }
 131                 if ( $type & ( SIMPLEPIE_CONSTRUCT_HTML | SIMPLEPIE_CONSTRUCT_XHTML ) ) {
 132                         $data = wp_kses_post( $data );
 133                         if ( $this->output_encoding !== 'UTF-8' ) {
 134                                 $data = $this->registry->call( 'Misc', 'change_encoding', array( $data, 'UTF-8', $this->output_encoding ) );
 135                         }
 136                         return $data;
 137                 } else {
 138                         return parent::sanitize( $data, $type, $base );
 139                 }
 140         }
 141 }