*/ function pingback_ping($args) { global $wpdb; do_action('xmlrpc_call', 'pingback.ping'); $this->escape($args); $pagelinkedfrom = $args[0]; $pagelinkedto = $args[1]; $title = ''; $pagelinkedfrom = str_replace('&', '&', $pagelinkedfrom); $pagelinkedto = str_replace('&', '&', $pagelinkedto); $pagelinkedto = str_replace('&', '&', $pagelinkedto); // Check if the page linked to is in our site $pos1 = strpos($pagelinkedto, str_replace(array('http://www.','http://','https://www.','https://'), '', get_option('home'))); if ( !$pos1 ) return new IXR_Error(0, __('Is there no link to us?')); // let's find which post is linked to // FIXME: does url_to_postid() cover all these cases already? // if so, then let's use it and drop the old code. $urltest = parse_url($pagelinkedto); if ( $post_ID = url_to_postid($pagelinkedto) ) { $way = 'url_to_postid()'; } elseif ( preg_match('#p/[0-9]{1,}#', $urltest['path'], $match) ) { // the path defines the post_ID (archives/p/XXXX) $blah = explode('/', $match[0]); $post_ID = (int) $blah[1]; $way = 'from the path'; } elseif ( preg_match('#p=[0-9]{1,}#', $urltest['query'], $match) ) { // the querystring defines the post_ID (?p=XXXX) $blah = explode('=', $match[0]); $post_ID = (int) $blah[1]; $way = 'from the querystring'; } elseif ( isset($urltest['fragment']) ) { // an #anchor is there, it's either... if ( intval($urltest['fragment']) ) { // ...an integer #XXXX (simpliest case) $post_ID = (int) $urltest['fragment']; $way = 'from the fragment (numeric)'; } elseif ( preg_match('/post-[0-9]+/',$urltest['fragment']) ) { // ...a post id in the form 'post-###' $post_ID = preg_replace('/[^0-9]+/', '', $urltest['fragment']); $way = 'from the fragment (post-###)'; } elseif ( is_string($urltest['fragment']) ) { // ...or a string #title, a little more complicated $title = preg_replace('/[^a-z0-9]/i', '.', $urltest['fragment']); $sql = $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_title RLIKE %s", like_escape( $title ) ); if (! ($post_ID = $wpdb->get_var($sql)) ) { // returning unknown error '0' is better than die()ing return new IXR_Error(0, ''); } $way = 'from the fragment (title)'; } } else { // TODO: Attempt to extract a post ID from the given URL return new IXR_Error(33, __('The specified target URL cannot be used as a target. It either doesn’t exist, or it is not a pingback-enabled resource.')); } $post_ID = (int) $post_ID; logIO("O","(PB) URL='$pagelinkedto' ID='$post_ID' Found='$way'"); $post = get_post($post_ID); if ( !$post ) // Post_ID not found return new IXR_Error(33, __('The specified target URL cannot be used as a target. It either doesn’t exist, or it is not a pingback-enabled resource.')); if ( $post_ID == url_to_postid($pagelinkedfrom) ) return new IXR_Error(0, __('The source URL and the target URL cannot both point to the same resource.')); // Check if pings are on if ( !pings_open($post) ) return new IXR_Error(33, __('The specified target URL cannot be used as a target. It either doesn’t exist, or it is not a pingback-enabled resource.')); // Let's check that the remote site didn't already pingback this entry if ( $wpdb->get_results( $wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_author_url = %s", $post_ID, $pagelinkedfrom) ) ) return new IXR_Error( 48, __( 'The pingback has already been registered.' ) ); // very stupid, but gives time to the 'from' server to publish ! sleep(1); // Let's check the remote site $linea = wp_remote_fopen( $pagelinkedfrom ); if ( !$linea ) return new IXR_Error(16, __('The source URL does not exist.')); $linea = apply_filters('pre_remote_source', $linea, $pagelinkedto); // Work around bug in strip_tags(): $linea = str_replace(']*>/", "\n\n", $linea ); preg_match('|([^<]*?)|is', $linea, $matchtitle); $title = $matchtitle[1]; if ( empty( $title ) ) return new IXR_Error(32, __('We cannot find a title on that page.')); $linea = strip_tags( $linea, '' ); // just keep the tag we need $p = explode( "\n\n", $linea ); $preg_target = preg_quote($pagelinkedto, '|'); foreach ( $p as $para ) { if ( strpos($para, $pagelinkedto) !== false ) { // it exists, but is it a link? preg_match("|]+?".$preg_target."[^>]*>([^>]+?)|", $para, $context); // If the URL isn't in a link context, keep looking if ( empty($context) ) continue; // We're going to use this fake tag to mark the context in a bit // the marker is needed in case the link text appears more than once in the paragraph $excerpt = preg_replace('|\|', '', $para); // prevent really long link text if ( strlen($context[1]) > 100 ) $context[1] = substr($context[1], 0, 100) . '...'; $marker = ''.$context[1].''; // set up our marker $excerpt= str_replace($context[0], $marker, $excerpt); // swap out the link for our marker $excerpt = strip_tags($excerpt, ''); // strip all tags but our context marker $excerpt = trim($excerpt); $preg_marker = preg_quote($marker, '|'); $excerpt = preg_replace("|.*?\s(.{0,100}$preg_marker.{0,100})\s.*|s", '$1', $excerpt); $excerpt = strip_tags($excerpt); // YES, again, to remove the marker wrapper break; } } if ( empty($context) ) // Link to target not found return new IXR_Error(17, __('The source URL does not contain a link to the target URL, and so cannot be used as a source.')); $pagelinkedfrom = str_replace('&', '&', $pagelinkedfrom); $context = '[...] ' . esc_html( $excerpt ) . ' [...]'; $pagelinkedfrom = $wpdb->escape( $pagelinkedfrom ); $comment_post_ID = (int) $post_ID; $comment_author = $title; $comment_author_email = ''; $this->escape($comment_author); $comment_author_url = $pagelinkedfrom; $comment_content = $context; $this->escape($comment_content); $comment_type = 'pingback'; $commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_url', 'comment_author_email', 'comment_content', 'comment_type'); $comment_ID = wp_new_comment($commentdata); do_action('pingback_post', $comment_ID); return sprintf(__('Pingback from %1$s to %2$s registered. Keep the web talking! :-)'), $pagelinkedfrom, $pagelinkedto); } /** * Retrieve array of URLs that pingbacked the given URL. * * Specs on http://www.aquarionics.com/misc/archives/blogite/0198.html * * @since 1.5.0 * * @param array $args Method parameters. * @return array */ function pingback_extensions_getPingbacks($args) { global $wpdb; do_action('xmlrpc_call', 'pingback.extensions.getPingbacks'); $this->escape($args); $url = $args; $post_ID = url_to_postid($url); if ( !$post_ID ) { // We aren't sure that the resource is available and/or pingback enabled return new IXR_Error(33, __('The specified target URL cannot be used as a target. It either doesn’t exist, or it is not a pingback-enabled resource.')); } $actual_post = wp_get_single_post($post_ID, ARRAY_A); if ( !$actual_post ) { // No such post = resource not found return new IXR_Error(32, __('The specified target URL does not exist.')); } $comments = $wpdb->get_results( $wpdb->prepare("SELECT comment_author_url, comment_content, comment_author_IP, comment_type FROM $wpdb->comments WHERE comment_post_ID = %d", $post_ID) ); if ( !$comments ) return array(); $pingbacks = array(); foreach ( $comments as $comment ) { if ( 'pingback' == $comment->comment_type ) $pingbacks[] = $comment->comment_author_url; } return $pingbacks; } } ?>
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XML-RPC server accepts POST requests only.