A simple rewrite script for PS3 Downloads which can be used as redirect_program in Squid3

squid-rewrite-ps3-cdn.php

#! /usr/bin/env php
<?php
/**
 * This is a simple rewrite script for use with Squid3.
 * 
 * The primary use case for this script is to fetch any PKG URL which might be downloaded from the Playstation CDN and download them somewhere different.
 * This allows downloading big games on an always-on machine which takes less power than the Playstation. Or just download the file somewhere else where a fast internet connection is available.
 * 
 * Just place any downloaded pkg-file into the directory configured in PKG_PATH and accessible via LOCAL_URL. Your Playstation will magically download the file from your own server.
 * 
 * Requirements:
 * - Squid3
 * - A webserver (e.g. Apache, nginx or lighttpd)
 * 
 * Note: You have to point your webserver to the directory configured in PKG_PATH.
 * 
 * Add the following line into your squid3.conf:
 * url_rewrite_program /path/to/this/script
 */
define("PKG_PATH", "/data/software/ps3");// Path to your downloaded .pkg files
define("LOCAL_URL", "http://selfcoders.org/ps3pkg");// The local URL to which an already downloaded file should be rewritten

while ($line = fgets(STDIN))
{
	list($url, $fqdn, $ident, $method) = explode(" ", $line);

	// Currently only GET is supported
	if ($method != "GET")
	{
		echo "\n";
		continue;
	}

	$newUrl = "";

	if (preg_match("|^http://zeus\.dl\.playstation\.net/cdn/(.*)/(.*)/(.*)\.pkg|", $url, $matches))
	{
		$file = $matches[3] . ".pkg";

		if (file_exists(PKG_PATH . "/" . $file))
		{
			$newUrl = LOCAL_URL . "/" . $file;
		}
		else
		{
			file_put_contents(PKG_PATH . "/" . $file . ".txt", "Download " . $url . " to " . $file . ".");
		}
	}

	if (!$newUrl or $newUrl == $url)
	{
		echo "\n";
		continue;
	}

	file_put_contents("/var/log/squid3/squid-rewrite.log", sprintf("[%s] %s -> %s\n", date("c"), $url, $newUrl), FILE_APPEND);

	echo "OK rewrite-url=" . $newUrl . "\n";
}