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