nextcloud/lib/minimizer.php

62 lines
1.5 KiB
PHP
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<?php
abstract class OC_Minimizer {
public function generateETag($files) {
$etag = '';
sort($files);
foreach($files as $file_info) {
$file = $file_info[0] . '/' . $file_info[2];
$stat = stat($file);
$etag .= $file.$stat['mtime'].$stat['size'];
}
return md5($etag);
}
abstract public function minimizeFiles($files);
public function output($files, $cache_key) {
header('Content-Type: '.$this->contentType);
OC_Response::enableCaching();
$etag = $this->generateETag($files);
$cache_key .= '-'.$etag;
$gzout = false;
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$cache = OC_Cache::getGlobalCache();
if (!OC_Request::isNoCache() && (!defined('DEBUG') || !DEBUG)){
OC_Response::setETagHeader($etag);
$gzout = $cache->get($cache_key.'.gz');
}
if (!$gzout) {
$out = $this->minimizeFiles($files);
$gzout = gzencode($out);
$cache->set($cache_key.'.gz', $gzout);
OC_Response::setETagHeader($etag);
}
if ($encoding = OC_Request::acceptGZip()) {
header('Content-Encoding: '.$encoding);
$out = $gzout;
} else {
$out = gzdecode($gzout);
}
header('Content-Length: '.strlen($out));
echo $out;
}
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public function clearCache() {
$cache = OC_Cache::getGlobalCache();
$cache->clear('core.css');
$cache->clear('core.js');
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}
}
if (!function_exists('gzdecode')) {
function gzdecode($data,$maxlength=null,&$filename='',&$error='')
{
if (strcmp(substr($data,0,9),"\x1f\x8b\x8\0\0\0\0\0\0")) {
return null; // Not the GZIP format we expect (See RFC 1952)
}
return gzinflate(substr($data,10,-8));
}
}