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 _normalize_tag( $matches ) {
  47                 return '<' . strtolower( $matches[1] );
  48         }
  49
  50         function get_posts() {
  51                 global $wpdb;
  52
  53                 set_magic_quotes_runtime(0);
  54                 $datalines = file($this->file); // Read the file into an array
  55                 $importdata = implode('', $datalines); // squish it
  56                 $importdata = str_replace(array ("\r\n", "\r"), "\n", $importdata);
  57
  58                 preg_match_all('|<item>(.*?)</item>|is', $importdata, $this->posts);
  59                 $this->posts = $this->posts[1];
  60                 $index = 0;
  61                 foreach ($this->posts as $post) {
  62                         preg_match('|<title>(.*?)</title>|is', $post, $post_title);
  63                         $post_title = str_replace(array('<![CDATA[', ']]>'), '', $wpdb->escape( trim($post_title[1]) ));
  64
  65                         preg_match('|<pubdate>(.*?)</pubdate>|is', $post, $post_date_gmt);
  66
  67                         if ($post_date_gmt) {
  68                                 $post_date_gmt = strtotime($post_date_gmt[1]);
  69                         } else {
  70                                 // if we don't already have something from pubDate
  71                                 preg_match('|<dc:date>(.*?)</dc:date>|is', $post, $post_date_gmt);
  72                                 $post_date_gmt = preg_replace('|([-+])([0-9]+):([0-9]+)$|', '\1\2\3', $post_date_gmt[1]);
  73                                 $post_date_gmt = str_replace('T', ' ', $post_date_gmt);
  74                                 $post_date_gmt = strtotime($post_date_gmt);
  75                         }
  76
  77                         $post_date_gmt = gmdate('Y-m-d H:i:s', $post_date_gmt);
  78                         $post_date = get_date_from_gmt( $post_date_gmt );
  79
  80                         preg_match_all('|<category>(.*?)</category>|is', $post, $categories);
  81                         $categories = $categories[1];
  82
  83                         if (!$categories) {
  84                                 preg_match_all('|<dc:subject>(.*?)</dc:subject>|is', $post, $categories);
  85                                 $categories = $categories[1];
  86                         }
  87
  88                         $cat_index = 0;
  89                         foreach ($categories as $category) {
  90                                 $categories[$cat_index] = $wpdb->escape($this->unhtmlentities($category));
  91                                 $cat_index++;
  92                         }
  93
  94                         preg_match('|<guid.*?>(.*?)</guid>|is', $post, $guid);
  95                         if ($guid)
  96                                 $guid = $wpdb->escape(trim($guid[1]));
  97                         else
  98                                 $guid = '';
  99
 100                         preg_match('|<content:encoded>(.*?)</content:encoded>|is', $post, $post_content);
 101                         $post_content = str_replace(array ('<![CDATA[', ']]>'), '', $wpdb->escape(trim($post_content[1])));
 102
 103                         if (!$post_content) {
 104                                 // This is for feeds that put content in description
 105                                 preg_match('|<description>(.*?)</description>|is', $post, $post_content);
 106                                 $post_content = $wpdb->escape($this->unhtmlentities(trim($post_content[1])));
 107                         }
 108
 109                         // Clean up content
 110                         $post_content = preg_replace_callback('|<(/?[A-Z]+)|', array( &$this, '_normalize_tag' ), $post_content);
 111                         $post_content = str_replace('<br>', '<br />', $post_content);
 112                         $post_content = str_replace('<hr>', '<hr />', $post_content);
 113
 114                         $post_author = 1;
 115                         $post_status = 'publish';
 116                         $this->posts[$index] = compact('post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_status', 'guid', 'categories');
 117                         $index++;
 118                 }
 119         }
 120
 121         function import_posts() {
 122                 echo '<ol>';
 123
 124                 foreach ($this->posts as $post) {
 125                         echo "<li>".__('Importing post...');
 126
 127                         extract($post);
 128
 129                         if ($post_id = post_exists($post_title, $post_content, $post_date)) {
 130                                 _e('Post already imported');
 131                         } else {
 132                                 $post_id = wp_insert_post($post);
 133                                 if ( is_wp_error( $post_id ) )
 134                                         return $post_id;
 135                                 if (!$post_id) {
 136                                         _e('Couldn&#8217;t get post ID');
 137                                         return;
 138                                 }
 139
 140                                 if (0 != count($categories))
 141                                         wp_create_categories($categories, $post_id);
 142                                 _e('Done !');
 143                         }
 144                         echo '</li>';
 145                 }
 146
 147                 echo '</ol>';
 148
 149         }
 150
 151         function import() {
 152                 $file = wp_import_handle_upload();
 153                 if ( isset($file['error']) ) {
 154                         echo $file['error'];
 155                         return;
 156                 }
 157
 158                 $this->file = $file['file'];
 159                 $this->get_posts();
 160                 $result = $this->import_posts();
 161                 if ( is_wp_error( $result ) )
 162                         return $result;
 163                 wp_import_cleanup($file['id']);
 164                 do_action('import_done', 'rss');
 165
 166                 echo '<h3>';
 167                 printf(__('All done. <a href="%s">Have fun!</a>'), get_option('home'));
 168                 echo '</h3>';
 169         }
 170
 171         function dispatch() {
 172                 if (empty ($_GET['step']))
 173                         $step = 0;
 174                 else
 175                         $step = (int) $_GET['step'];
 176
 177                 $this->header();
 178
 179                 switch ($step) {
 180                         case 0 :
 181                                 $this->greet();
 182                                 break;
 183                         case 1 :
 184                                 check_admin_referer('import-upload');
 185                                 $result = $this->import();
 186                                 if ( is_wp_error( $result ) )
 187                                         echo $result->get_error_message();
 188                                 break;
 189                 }
 190
 191                 $this->footer();
 192         }
 193
 194         function RSS_Import() {
 195                 // Nothing.
 196         }
 197 }
 198
 199 $rss_import = new RSS_Import();
 200
 201 register_importer('rss', __('RSS'), __('Import posts from an RSS feed.'), array ($rss_import, 'dispatch'));
 202 ?>