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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html Gpl v3 or later
* @version $Id$
*/
$file = '../piwik.js';
if (file_exists($file)) {
// conditional GET
$modifiedSince = '';
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$modifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
}
$lastModified = gmdate('D, d M Y H:i:s', filemtime($file)) . ' GMT';
// optional compression
$compressed = false;
$encoding = '';
if (extension_loaded('zlib') && function_exists('file_get_contents') && function_exists('file_put_contents') && isset($_SERVER['HTTP_ACCEPT_ENCODING'])) {
$acceptEncoding = $_SERVER['HTTP_ACCEPT_ENCODING'];
if (preg_match('/(?:^|, ?)(deflate)(?:,|$)/', $acceptEncoding, $matches)) {
$encoding = $matches[1];
} else if (preg_match('/(?:^|, ?)((x-)?gzip)(?:,|$)/', $acceptEncoding, $matches)) {
$encoding = $matches[1];
}
if (!empty($encoding)) {
$filegz = '../piwik.js.' . $encoding;
if(!file_exists($filegz) || (filemtime($file) > filemtime($filegz))) {
$data = file_get_contents($file);
if ($encoding == 'deflate') {
$data = gzcompress($data, 9);
} else if ($encoding == 'gzip' || $encoding == 'x-gzip') {
$data = gzencode($data, 9);
}
file_put_contents($filegz, $data);
$compressed = true;
$file = $filegz;
}
}
}
// strip any trailing data appended to header
if (false !== ($semicolon = strpos($modifiedSince, ';'))) {
$modifiedSince = substr($modifiedSince, 0, $semicolon);
}
if ($modifiedSince == $lastModified) {
header('HTTP/1.1 304 Not Modified');
} else {
header('Last-Modified: ' . $lastModified);
header('Content-Length: ' . filesize($file));
header('Content-Type: application/x-javascript; charset=UTF-8');
if ($compressed) {
header('Content-Encoding: ' . $encoding);
}
if (!readfile($file)) {
header ('HTTP/1.0 505 Internal server error');
}
}
} else {
header ('HTTP/1.0 404 Not Found');
}
exit;
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