Source for file trackback.php

Documentation is available at trackback.php

<?php
/**
* This file handles trackback requests
*
* b2evolution - {@link http://b2evolution.net/}
* Released under GNU GPL License - {@link http://b2evolution.net/about/license.html}
*
* @package htsrv
*/
/**
* Initialize everything:
*/
require_once (dirname(__FILE__).'/../b2evocore/_main.php');
// statuses allowed for acting on:
$show_statuses = array( 'published', 'protected', 'private' );
param( 'tb_id', 'integer' );
param( 'url', 'string' );
param( 'title', 'string' );
param( 'excerpt', 'html' );
param( 'blog_name', 'string' );
if(empty($tb_id))
{ // No parameter for ID, get if from URL:
$path_elements = explode( '/', $ReqPath, 30 );
$tb_id = intval( $path_elements[count($path_elements)-1] );
}
if ((strlen(''.$tb_id)) && (empty($HTTP_GET_VARS['__mode'])) && (strlen(''.$url)))
{
@header('Content-Type: text/xml');
$comment_post_ID = $tb_id;
$postdata = get_postdata($comment_post_ID);
$blog = $postdata['Blog'];
$blogparams = get_blogparams_by_ID( $blog );
if( !get_bloginfo('allowtrackbacks', $blogparams) )
{
trackback_response(1, 'Sorry, this weblog does not allow you to trackback its posts.');
}
if( $postdata['comments'] != 'open' )
{
trackback_response( 1, 'Sorry, this item does not accept comments.' );
}
$title = strip_tags($title);
$title = (strlen($title) > 255) ? substr($title, 0, 252).'...' : $title;
$excerpt = strip_tags($excerpt);
$excerpt = (strlen($excerpt) > 255) ? substr($excerpt, 0, 252).'...' : $excerpt;
$blog_name = htmlspecialchars($blog_name);
$blog_name = (strlen($blog_name) > 255) ? substr($blog_name, 0, 252).'...' : $blog_name;
$comment = "<strong>$title</strong><br />$excerpt";
$original_comment = $comment;
$user_ip = $_SERVER['REMOTE_ADDR'];
$user_ip = explode( ',', $user_ip );
$user_ip = $user_ip[0];
$user_domain = gethostbyaddr($user_ip);
$now = date('Y-m-d H:i:s', $localtimenow );
// CHECK and FORMAT content
if( $error = validate_url( $url, $comments_allowed_uri_scheme ) )
{
errors_add( T_('Supplied URL is invalid: ').$error );
}
$comment = format_to_post($comment,1,1);
if( empty($comment) )
{ // comment should not be empty!
errors_add( T_('Please do not send empty comment') );
}
elseif( antispam_check( strip_tags($comment) ) )
{
errors_add( T_('Supplied comment is invalid') );
}
if( $errstring = errors_string( 'Cannot insert trackback, please correct these errors:', '' ) )
{
trackback_response(2, $errstring); // TODO: check that error code 2 is ok
die();
}
$comment_author = $blog_name;
$comment_author_email = '';
$comment_author_url = $url;
$query = "INSERT INTO $tablecomments( comment_post_ID, comment_type, comment_author,
comment_author_email, comment_author_url, comment_author_IP,
comment_date, comment_content)
VALUES( $comment_post_ID, 'trackback', '".$DB->escape($comment_author)."',
'".$DB->escape($comment_author_email)."', '".$DB->escape($comment_author_url)."', '".$DB->escape($user_ip)."',
'$now', '".$DB->escape($comment)."' )";
if( !$DB->query( $query ) )
{
trackback_response(2, "There is an error with the database, it can't store your comment...<br />Contact the <a href=\"mailto:$admin_email\">webmaster</a>"); // TODO: check that error code 2 is ok
die ();
}
/*
* New trackback notification:
*/
$authordata = get_userdata($postdata['Author_ID']);
if( get_user_info( 'notify', $authordata ) )
{ // Author wants to be notified:
locale_temp_switch( get_user_info( 'locale', $authordata ) );
$recipient = get_user_info( 'email', $authordata );
$subject = sprintf( T_('New trackback on your post #%d "%s"'), $comment_post_ID, $postdata['Title'] );
// fplanque added:
$comment_blogparams = get_blogparams_by_ID( $blog );
$notify_message = sprintf( T_('New trackback on your post #%d "%s"'), $comment_post_ID, $postdata['Title'] )."\n";
$notify_message .= url_add_param( get_bloginfo('blogurl', $comment_blogparams), "p=$comment_post_ID&tb=1\n\n", '&' );
$notify_message .= T_('Website').": $comment_author (IP: $user_ip , $user_domain)\n";
$notify_message .= T_('Url').": $comment_author_url\n";
$notify_message .= T_('Excerpt').": \n".$original_comment."\n\n";
$notify_message .= T_('Edit/Delete').': '.$admin_url.'/b2browse.php?blog='.$blog.'&p='.$comment_post_ID."&c=1\n\n";
send_mail( $recipient, $subject, $notify_message, $notify_from );
locale_restore_previous();
}
trackback_response(0,'ok');
}
?>

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Source for file trackback.php

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