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<?php
/************************************************************************
* CSS and Javascript Combinator 0.5
* Copyright 2006 by Niels Leenheer
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
$cache = false;
$cachedir = dirname(__FILE__) . '/cache';
$cssdir = dirname(__FILE__) . '/css';
$jsdir = dirname(__FILE__) . '/js';
// Determine the directory and type we should use
switch ($_GET['type']) {
case 'css':
$base = realpath($cssdir);
break;
case 'javascript':
$base = realpath($jsdir);
break;
default:
header ("HTTP/1.0 503 Not Implemented");
exit;
};
$type = $_GET['type'];
$elements = explode(',', $_GET['files']);
// Determine last modification date of the files
$lastmodified = 0;
while (list(,$element) = each($elements)) {
$path = realpath($base . '/' . $element);
if (($type == 'javascript' && substr($path, -3) != '.js') ||
($type == 'css' && substr($path, -4) != '.css')) {
// header ("HTTP/1.0 403 Forbidden");
exit;
}
if (substr($path, 0, strlen($base)) != $base || !file_exists($path)) {
header ("HTTP/1.0 404 Not Found");
exit;
}
$lastmodified = max($lastmodified, filemtime($path));
}
// Send Etag hash
$hash = $lastmodified . '-' . md5($_GET['files']);
header ("Etag: \"" . $hash . "\"");
if (isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) == '"' . $hash . '"')
{
// Return visit and no modifications, so do not send anything
header ("HTTP/1.0 304 Not Modified");
header ('Content-Length: 0');
}
else
{
// First time visit or files were modified
if ($cache)
{
// Determine supported compression method
$gzip = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip');
$deflate = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate');
// Determine used compression method
$encoding = $gzip ? 'gzip' : ($deflate ? 'deflate' : 'none');
// Check for buggy versions of Internet Explorer
if (!strstr($_SERVER['HTTP_USER_AGENT'], 'Opera') &&
preg_match('/^Mozilla\/4\.0 \(compatible; MSIE ([0-9]\.[0-9])/i', $_SERVER['HTTP_USER_AGENT'], $matches)) {
$version = floatval($matches[1]);
if ($version < 6)
$encoding = 'none';
if ($version == 6 && !strstr($_SERVER['HTTP_USER_AGENT'], 'EV1'))
$encoding = 'none';
}
// Try the cache first to see if the combined files were already generated
$cachefile = 'cache-' . $hash . '.' . $type . ($encoding != 'none' ? '.' . $encoding : '');
if (file_exists($cachedir . '/' . $cachefile)) {
if ($fp = fopen($cachedir . '/' . $cachefile, 'rb')) {
if ($encoding != 'none') {
header ("Content-Encoding: " . $encoding);
}
header ("Content-Type: text/" . $type);
header ("Content-Length: " . filesize($cachedir . '/' . $cachefile));
fpassthru($fp);
fclose($fp);
exit;
}
}
}
// Get contents of the files
$contents = '';
reset($elements);
while (list(,$element) = each($elements)) {
$path = realpath($base . '/' . $element);
$contents .= "\n\n" . file_get_contents($path);
}
// Send Content-Type
header ("Content-Type: text/" . $type);
if (isset($encoding) && $encoding != 'none')
{
// Send compressed contents
$contents = gzencode($contents, 9, $gzip ? FORCE_GZIP : FORCE_DEFLATE);
header ("Content-Encoding: " . $encoding);
header ('Content-Length: ' . strlen($contents));
echo $contents;
}
else
{
// Send regular contents
header ('Content-Length: ' . strlen($contents));
echo $contents;
}
// Store cache
if ($cache) {
if ($fp = fopen($cachedir . '/' . $cachefile, 'wb')) {
fwrite($fp, $contents);
fclose($fp);
}
}
}
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