trackback.php

<?php

include_once('internal/Smarty.class.php');
$main_smarty = new Smarty;

include('config.php');
include(mnminclude.'trackback.php');
include(mnminclude.'link.php');
include(mnminclude.'html1.php');
include(mnminclude.'smartyvariables.php');

function trackback_response($error = 0, $error_message = '')
{
    header('Content-Type: text/xml; charset=UTF-8');
    if ($error) {
        echo '<?phpxml 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 '<?phpxml version="1.0" encoding="utf-8"?'.">\n";
        echo "<response>\n";
        echo "<error>0</error>\n";
        echo "</response>";
    }
    die;
}

$tb_url    = strip_tags($_POST['url']);
$title     = strip_tags($_POST['title']);
$excerpt   = strip_tags($_POST['excerpt']);
$blog_name = strip_tags($_POST['blog_name']);
$charset   = strip_tags($_POST['charset']);

// DB 08/01/08
if (!preg_match("/^[hf]t[t]?p[s]?:\/\//",$tb_url)) {
    $tb_url = "";
}
/////


if (!empty($charset)) {
    $title = @iconv($charset, 'UTF-8//IGNORE', $title);
    $excerpt = @iconv($charset, 'UTF-8//IGNORE', $excerpt);
    $blog_name = @iconv($charset, 'UTF-8//IGNORE', $blog_name);
}

$tb_id = strip_tags($_GET['id']);

if ( !is_numeric( $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...
    header('Location: ' . getmyFullurl("story", $tb_id));
    exit;
}

if ( !empty($tb_url) && !empty($title) && !empty($tb_url) ) {
    header('Content-Type: text/xml; charset=UTF-8');

    $title =  htmlspecialchars( strip_tags( $title ) );
    $title = (strlen($title) > 150) ? substr($title, 0, 150) . '...' : $title;
    $excerpt = strip_tags($excerpt);
    $excerpt = (strlen($excerpt) > 200) ? substr($excerpt, 0, 200) . '...' : $excerpt;

    $trackres = new Trackback;
    $trackres->link=$tb_id;
    $trackres->type='in';
    $trackres->url = $tb_url;
    $dupe = $trackres->read();
    if ( $dupe ) {
        trackback_response(1, $main_smarty->get_config_vars('PLIGG_Visual_Trackback_AlreadyPing'));
    }

    $contents=@file_get_contents($tb_url);
    if (!$contents) {
        trackback_response(1, $main_smarty->get_config_vars('PLIGG_Visual_Trackback_BadURL'));
    }


    $permalink=get_permalink($tb_id);
    $permalink_q=preg_quote($permalink,'/');
    $pattern="/<\s*a.*href\s*=[\"'\s]*".$permalink_q."[\"'\s]*.*>.*<\s*\/\s*a\s*>/i";
    if (!preg_match($pattern,$contents)) {
        trackback_response(1, $main_smarty->get_config_vars('PLIGG_Visual_Trackback_NoReturnLink'));
    }

    $trackres->title=$title;
    $trackres->content=$excerpt;
    $trackres->status='ok';
    $trackres->store();

    trackback_response(0);
}

?>