wp-admin/import/rss.php

   1 <?php
   2 /**
   3  * RSS Importer
   4  *
   5  * @package WordPress
   6  * @subpackage Importer
   7  */
   8
   9 /**
  10  * RSS Importer
  11  *
  12  * Will process a RSS feed for importing posts into WordPress. This is a very
  13  * limited importer and should only be used as the last resort, when no other
  14  * importer is available.
  15  *
  16  * @since unknown
  17  */
  18 class RSS_Import {
  19
  20         var $posts = array ();
  21         var $file;
  22
  23         function header() {
  24                 echo '<div class="wrap">';
  25                 screen_icon();
  26                 echo '<h2>'.__('Import RSS').'</h2>';
  27         }
  28
  29         function footer() {
  30                 echo '</div>';
  31         }
  32
  33         function unhtmlentities($string) { // From php.net for < 4.3 compat
  34                 $trans_tbl = get_html_translation_table(HTML_ENTITIES);
  35                 $trans_tbl = array_flip($trans_tbl);
  36                 return strtr($string, $trans_tbl);
  37         }
  38
  39         function greet() {
  40                 echo '<div class="narrow">';
  41                 echo '<p>'.__('Howdy! This importer allows you to extract posts from an RSS 2.0 file into your blog. This is useful if you want to import your posts from a system that is not handled by a custom import tool. Pick an RSS file to upload and click Import.').'</p>';
  42                 wp_import_upload_form("admin.php?import=rss&amp;step=1");
  43                 echo '</div>';
  44         }
  45
  46         function get_posts() {
  47                 global $wpdb;
  48
  49                 set_magic_quotes_runtime(0);
  50                 $datalines = file($this->file); // Read the file into an array
  51                 $importdata = implode('', $datalines); // squish it
  52                 $importdata = str_replace(array ("\r\n", "\r"), "\n", $importdata);
  53
  54                 preg_match_all('|<item>(.*?)</item>|is', $importdata, $this->posts);
  55                 $this->posts = $this->posts[1];
  56                 $index = 0;
  57                 foreach ($this->posts as $post) {
  58                         preg_match('|<title>(.*?)</title>|is', $post, $post_title);
  59                         $post_title = str_replace(array('<![CDATA[', ']]>'), '', $wpdb->escape( trim($post_title[1]) ));
  60
  61                         preg_match('|<pubdate>(.*?)</pubdate>|is', $post, $post_date_gmt);
  62
  63                         if ($post_date_gmt) {
  64                                 $post_date_gmt = strtotime($post_date_gmt[1]);
  65                         } else {
  66                                 // if we don't already have something from pubDate
  67                                 preg_match('|<dc:date>(.*?)</dc:date>|is', $post, $post_date_gmt);
  68                                 $post_date_gmt = preg_replace('|([-+])([0-9]+):([0-9]+)$|', '\1\2\3', $post_date_gmt[1]);
  69                                 $post_date_gmt = str_replace('T', ' ', $post_date_gmt);
  70                                 $post_date_gmt = strtotime($post_date_gmt);
  71                         }
  72
  73                         $post_date_gmt = gmdate('Y-m-d H:i:s', $post_date_gmt);
  74                         $post_date = get_date_from_gmt( $post_date_gmt );
  75
  76                         preg_match_all('|<category>(.*?)</category>|is', $post, $categories);
  77                         $categories = $categories[1];
  78
  79                         if (!$categories) {
  80                                 preg_match_all('|<dc:subject>(.*?)</dc:subject>|is', $post, $categories);
  81                                 $categories = $categories[1];
  82                         }
  83
  84                         $cat_index = 0;
  85                         foreach ($categories as $category) {
  86                                 $categories[$cat_index] = $wpdb->escape($this->unhtmlentities($category));
  87                                 $cat_index++;
  88                         }
  89
  90                         preg_match('|<guid.*?>(.*?)</guid>|is', $post, $guid);
  91                         if ($guid)
  92                                 $guid = $wpdb->escape(trim($guid[1]));
  93                         else
  94                                 $guid = '';
  95
  96                         preg_match('|<content:encoded>(.*?)</content:encoded>|is', $post, $post_content);
  97                         $post_content = str_replace(array ('<![CDATA[', ']]>'), '', $wpdb->escape(trim($post_content[1])));
  98
  99                         if (!$post_content) {
 100                                 // This is for feeds that put content in description
 101                                 preg_match('|<description>(.*?)</description>|is', $post, $post_content);
 102                                 $post_content = $wpdb->escape($this->unhtmlentities(trim($post_content[1])));
 103                         }
 104
 105                         // Clean up content
 106                         $post_content = preg_replace_callback('|<(/?[A-Z]+)|', create_function('$match', 'return "<" . strtolower($match[1]);'), $post_content);
 107                         $post_content = str_replace('<br>', '<br />', $post_content);
 108                         $post_content = str_replace('<hr>', '<hr />', $post_content);
 109
 110                         $post_author = 1;
 111                         $post_status = 'publish';
 112                         $this->posts[$index] = compact('post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_status', 'guid', 'categories');
 113                         $index++;
 114                 }
 115         }
 116
 117         function import_posts() {
 118                 echo '<ol>';
 119
 120                 foreach ($this->posts as $post) {
 121                         echo "<li>".__('Importing post...');
 122
 123                         extract($post);
 124
 125                         if ($post_id = post_exists($post_title, $post_content, $post_date)) {
 126                                 _e('Post already imported');
 127                         } else {
 128                                 $post_id = wp_insert_post($post);
 129                                 if ( is_wp_error( $post_id ) )
 130                                         return $post_id;
 131                                 if (!$post_id) {
 132                                         _e('Couldn&#8217;t get post ID');
 133                                         return;
 134                                 }
 135
 136                                 if (0 != count($categories))
 137                                         wp_create_categories($categories, $post_id);
 138                                 _e('Done !');
 139                         }
 140                         echo '</li>';
 141                 }
 142
 143                 echo '</ol>';
 144
 145         }
 146
 147         function import() {
 148                 $file = wp_import_handle_upload();
 149                 if ( isset($file['error']) ) {
 150                         echo $file['error'];
 151                         return;
 152                 }
 153
 154                 $this->file = $file['file'];
 155                 $this->get_posts();
 156                 $result = $this->import_posts();
 157                 if ( is_wp_error( $result ) )
 158                         return $result;
 159                 wp_import_cleanup($file['id']);
 160                 do_action('import_done', 'rss');
 161
 162                 echo '<h3>';
 163                 printf(__('All done. <a href="%s">Have fun!</a>'), get_option('home'));
 164                 echo '</h3>';
 165         }
 166
 167         function dispatch() {
 168                 if (empty ($_GET['step']))
 169                         $step = 0;
 170                 else
 171                         $step = (int) $_GET['step'];
 172
 173                 $this->header();
 174
 175                 switch ($step) {
 176                         case 0 :
 177                                 $this->greet();
 178                                 break;
 179                         case 1 :
 180                                 check_admin_referer('import-upload');
 181                                 $result = $this->import();
 182                                 if ( is_wp_error( $result ) )
 183                                         echo $result->get_error_message();
 184                                 break;
 185                 }
 186
 187                 $this->footer();
 188         }
 189
 190         function RSS_Import() {
 191                 // Nothing.
 192         }
 193 }
 194
 195 $rss_import = new RSS_Import();
 196
 197 register_importer('rss', __('RSS'), __('Import posts from an RSS feed.'), array ($rss_import, 'dispatch'));
 198 ?>