store-id.php

<?php
$query = $_GET['url'];
if(preg_match('#^https?:\/\/.*\.fbsbx\.com\/file_download\.php\?(id=[^\&\s]*).*#i', "$query", $match))
    {
    echo 'OK store-id=http://fb-attachment.squid.internal/';
    echo $match[1];
    }
else if(preg_match('#^http:\/\/.*\/depot\/[0-9]{3}\/chunk\/(.*?)(\?.*|$)#i', "$query", $match))
    {
    echo 'OK store-id=http://dota2.squid.internal/';
    echo $match[1];
    }

else if(preg_match('#^https?:\/\/[^\.]+\.dl\.sourceforge\.net\/(.*)#i', "$query", $match))
    {
    echo 'OK store-id=http://sourceforge.squid.internal/';
    echo $match[1];
    }

else
    {
    echo 'ERR';
    }
?>