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146 lines
4.5 KiB
146 lines
4.5 KiB
<?php |
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/** |
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* Handle Trackbacks and Pingbacks Sent to WordPress |
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* |
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* @since 0.71 |
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* |
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* @package WordPress |
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* @subpackage Trackbacks |
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*/ |
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if (empty($wp)) { |
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require_once( dirname( __FILE__ ) . '/wp-load.php' ); |
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wp( array( 'tb' => '1' ) ); |
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} |
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/** |
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* Response to a trackback. |
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* |
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* Responds with an error or success XML message. |
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* |
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* @since 0.71 |
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* |
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* @param mixed $error Whether there was an error. |
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* Default '0'. Accepts '0' or '1', true or false. |
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* @param string $error_message Error message if an error occurred. |
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*/ |
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function trackback_response($error = 0, $error_message = '') { |
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header('Content-Type: text/xml; charset=' . get_option('blog_charset') ); |
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if ($error) { |
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echo '<?xml version="1.0" encoding="utf-8"?'.">\n"; |
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echo "<response>\n"; |
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echo "<error>1</error>\n"; |
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echo "<message>$error_message</message>\n"; |
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echo "</response>"; |
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die(); |
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} else { |
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echo '<?xml version="1.0" encoding="utf-8"?'.">\n"; |
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echo "<response>\n"; |
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echo "<error>0</error>\n"; |
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echo "</response>"; |
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} |
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} |
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// Trackback is done by a POST. |
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$request_array = 'HTTP_POST_VARS'; |
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if ( !isset($_GET['tb_id']) || !$_GET['tb_id'] ) { |
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$tb_id = explode('/', $_SERVER['REQUEST_URI']); |
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$tb_id = intval( $tb_id[ count($tb_id) - 1 ] ); |
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} |
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$tb_url = isset($_POST['url']) ? $_POST['url'] : ''; |
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$charset = isset($_POST['charset']) ? $_POST['charset'] : ''; |
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// These three are stripslashed here so they can be properly escaped after mb_convert_encoding(). |
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$title = isset($_POST['title']) ? wp_unslash($_POST['title']) : ''; |
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$excerpt = isset($_POST['excerpt']) ? wp_unslash($_POST['excerpt']) : ''; |
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$blog_name = isset($_POST['blog_name']) ? wp_unslash($_POST['blog_name']) : ''; |
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if ($charset) |
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$charset = str_replace( array(',', ' '), '', strtoupper( trim($charset) ) ); |
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else |
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$charset = 'ASCII, UTF-8, ISO-8859-1, JIS, EUC-JP, SJIS'; |
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// No valid uses for UTF-7. |
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if ( false !== strpos($charset, 'UTF-7') ) |
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die; |
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// For international trackbacks. |
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if ( function_exists('mb_convert_encoding') ) { |
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$title = mb_convert_encoding($title, get_option('blog_charset'), $charset); |
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$excerpt = mb_convert_encoding($excerpt, get_option('blog_charset'), $charset); |
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$blog_name = mb_convert_encoding($blog_name, get_option('blog_charset'), $charset); |
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} |
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// Now that mb_convert_encoding() has been given a swing, we need to escape these three. |
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$title = wp_slash($title); |
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$excerpt = wp_slash($excerpt); |
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$blog_name = wp_slash($blog_name); |
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if ( is_single() || is_page() ) |
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$tb_id = $posts[0]->ID; |
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if ( !isset($tb_id) || !intval( $tb_id ) ) |
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trackback_response( 1, __( 'I really need an ID for this to work.' ) ); |
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if (empty($title) && empty($tb_url) && empty($blog_name)) { |
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// If it doesn't look like a trackback at all. |
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wp_redirect(get_permalink($tb_id)); |
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exit; |
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} |
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if ( !empty($tb_url) && !empty($title) ) { |
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/** |
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* Fires before the trackback is added to a post. |
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* |
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* @since 4.7.0 |
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* |
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* @param int $tb_id Post ID related to the trackback. |
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* @param string $tb_url Trackback URL. |
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* @param string $charset Character Set. |
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* @param string $title Trackback Title. |
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* @param string $excerpt Trackback Excerpt. |
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* @param string $blog_name Blog Name. |
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*/ |
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do_action( 'pre_trackback_post', $tb_id, $tb_url, $charset, $title, $excerpt, $blog_name ); |
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header('Content-Type: text/xml; charset=' . get_option('blog_charset') ); |
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if ( !pings_open($tb_id) ) |
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trackback_response( 1, __( 'Sorry, trackbacks are closed for this item.' ) ); |
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$title = wp_html_excerpt( $title, 250, '…' ); |
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$excerpt = wp_html_excerpt( $excerpt, 252, '…' ); |
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$comment_post_ID = (int) $tb_id; |
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$comment_author = $blog_name; |
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$comment_author_email = ''; |
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$comment_author_url = $tb_url; |
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$comment_content = "<strong>$title</strong>\n\n$excerpt"; |
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$comment_type = 'trackback'; |
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$dupe = $wpdb->get_results( $wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_author_url = %s", $comment_post_ID, $comment_author_url) ); |
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if ( $dupe ) |
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trackback_response( 1, __( 'We already have a ping from that URL for this post.' ) ); |
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$commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type'); |
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$result = wp_new_comment( $commentdata ); |
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if ( is_wp_error( $result ) ) { |
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trackback_response( 1, $result->get_error_message() ); |
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} |
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$trackback_id = $wpdb->insert_id; |
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/** |
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* Fires after a trackback is added to a post. |
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* |
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* @since 1.2.0 |
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* |
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* @param int $trackback_id Trackback ID. |
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*/ |
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do_action( 'trackback_post', $trackback_id ); |
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trackback_response( 0 ); |
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}
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