<?php
+/**
+ * Handle Trackbacks and Pingbacks Sent to WordPress
+ *
+ * @since 0.71
+ *
+ * @package WordPress
+ * @subpackage Trackbacks
+ */
if (empty($wp)) {
- require_once('./wp-config.php');
- wp('tb=1');
+ require_once( dirname( __FILE__ ) . '/wp-load.php' );
+ wp( array( 'tb' => '1' ) );
}
+/**
+ * Response to a trackback.
+ *
+ * Responds with an error or success XML message.
+ *
+ * @since 0.71
+ *
+ * @param mixed $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) {
}
}
-// trackback is done by a POST
+// Trackback is done by a POST.
$request_array = 'HTTP_POST_VARS';
-if ( !$_GET['tb_id'] ) {
+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 = $_POST['url'];
-$charset = $_POST['charset'];
+$tb_url = isset($_POST['url']) ? $_POST['url'] : '';
+$charset = isset($_POST['charset']) ? $_POST['charset'] : '';
-// These three are stripslashed here so that they can be properly escaped after mb_convert_encoding()
-$title = stripslashes($_POST['title']);
-$excerpt = stripslashes($_POST['excerpt']);
-$blog_name = stripslashes($_POST['blog_name']);
+// These three are stripslashed here so they can be properly escaped after mb_convert_encoding().
+$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)
- $charset = strtoupper( trim($charset) );
+ $charset = str_replace( array(',', ' '), '', strtoupper( trim($charset) ) );
else
$charset = 'ASCII, UTF-8, ISO-8859-1, JIS, EUC-JP, SJIS';
-if ( function_exists('mb_convert_encoding') ) { // For international trackbacks
+// No valid uses for UTF-7.
+if ( false !== strpos($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 = $wpdb->escape($title);
-$excerpt = $wpdb->escape($excerpt);
-$blog_name = $wpdb->escape($blog_name);
+// 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 ( !intval( $tb_id ) )
+if ( !isset($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...
+ // If it doesn't look like a trackback at all.
wp_redirect(get_permalink($tb_id));
exit;
}
if ( !empty($tb_url) && !empty($title) ) {
header('Content-Type: text/xml; charset=' . get_option('blog_charset') );
- $pingstatus = $wpdb->get_var("SELECT ping_status FROM $wpdb->posts WHERE ID = $tb_id");
-
- if ( 'open' != $pingstatus )
+ if ( !pings_open($tb_id) )
trackback_response(1, 'Sorry, trackbacks are closed for this item.');
- $title = wp_specialchars( strip_tags( $title ) );
- $excerpt = strip_tags($excerpt);
- if ( function_exists('mb_strcut') ) { // For international trackbacks
- $excerpt = mb_strcut($excerpt, 0, 252, get_option('blog_charset')) . '...';
- $title = mb_strcut($title, 0, 250, get_option('blog_charset')) . '...';
- } else {
- $excerpt = (strlen($excerpt) > 255) ? substr($excerpt, 0, 252) . '...' : $excerpt;
- $title = (strlen($title) > 250) ? substr($title, 0, 250) . '...' : $title;
- }
+ $title = wp_html_excerpt( $title, 250, '…' );
+ $excerpt = wp_html_excerpt( $excerpt, 252, '…' );
$comment_post_ID = (int) $tb_id;
$comment_author = $blog_name;
$comment_content = "<strong>$title</strong>\n\n$excerpt";
$comment_type = 'trackback';
- $dupe = $wpdb->get_results("SELECT * FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND comment_author_url = '$comment_author_url'");
+ $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.');
$commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type');
wp_new_comment($commentdata);
-
- do_action('trackback_post', $wpdb->insert_id);
- trackback_response(0);
+ $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 );
}
-?>
\ No newline at end of file
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff