<?php
/*
**	$Id$
**
**	Copyright (C) 1995-2007 by the ITools Authors.
**	This file is part of ITools - the Internet Tools Library
**
**	ITools is free software; you can redistribute it and/or modify
**	it under the terms of the GNU General Public License as published by
**	the Free Software Foundation; either version 3 of the License, or
**	(at your option) any later version.
**
**	ITools is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**	GNU General Public License for more details.
**
**	You should have received a copy of the GNU General Public License
**	along with this program.  If not, see <http://www.gnu.org/licenses/>.
**
**	itjs.php - Delivers /itjs/ files through AliasMatch in httpd.conf
*/

require "itools/itools.lib";

if (EDC('slowjs'))
	 sleep(20);

$data = "";
$files = itjs::filenames(it::match('/itjs/([a-z0-9_,.-]*)', $_SERVER['PHP_SELF']));

foreach ($files as $file)
{
	ob_start();	# Needs to capture inside loop to guarantee file order
	$data .= it::replace(array('^1$' => ""), @include($file));
	$data .= ob_get_clean();
}

$checksum = strlen($data) . itjs::checksum($files);

if (it::match('\.gif$', $file))
{
	header("Content-Type: image/gif");
}
else if (it::match('\.css', $_SERVER['PHP_SELF']))
{
	header("Content-Type: text/css");
	ob_start('ob_gzhandler');	
	$data .= "\n#it_boot_dom { display:none }\n";	# Append magic style for it_boot
	if (!it::match('^devel', $GLOBALS['ULTRASERVERTYPE']))
		$data = it::replace(array('[ \t]*([{};])[ \t]*' => '$1', '/\*.*?\*/' => ""), $data);
}
else if (!it::match('\.html$', $file))
{
	if ($_REQUEST['boot'] && !$_REQUEST['retry'])
		ob_start('ob_gzhandler');

	header("Content-Type: application/x-javascript; charset=iso-8859-1");
}

@header("Etag: $checksum");

if ($checksum != $_SERVER['HTTP_IF_NONE_MATCH'])
{
	if (!preg_match('/Opera/', $_SERVER['HTTP_USER_AGENT']))
		header("Cache-Control: max-age=900");

	$data = itjs::strip($data);

	if ($_REQUEST['boot'])
	{
		$data .= "window.it_boot_init();\n";
		$data = sprintf("/*sln:%d*/\n%s/*eln:%d*/", strlen($data), strtr($data, array('%' => "%25", '.' => "%2e", 'e' => "%65", 'i' => "%69")), strlen($data));	# Protect from Firewalls/Proxies altering Javascript source code
	}

	echo it_untaint($data);
}
else
	header("HTTP/1.0 304 Not Modified");

?>