nyro/module/compress/controller.class.php

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<?php
class module_compress_controller extends module_abstract {

        protected function execCssExt($prm=null) {
                $file = $prm[0];
                if (request::get('text'))
                        $file.= DS.request::get('text');
                response::getInstance()->showFile(file::nyroExists(array(
                        'name'=>'module'.DS.nyro::getCfg()->compressModule.DS.'css'.DS.$file,
                        'realName'=>true,
                        'type'=>'other'
                )));
        }

        protected function execJs($prm=null) {
                $this->compress('js', $prm);
        }

        protected function execCss($prm=null) {
                $this->compress('css', $prm);
        }

        protected function compress($type, $prm) {
                $resp = response::getInstance();
                
                if ($type == 'js') {
                        $conf = $this->cfg->all;
                        factory::mergeCfg($conf, $this->cfg->js);
                } else if ($type == 'css') {
                        $conf = $this->cfg->all;
                        factory::mergeCfg($conf, $this->cfg->css);
                }
                
                $key = $type.'--'.md5(serialize($prm)).'--'.md5(serialize($conf));
                $supportsGzip = false;
                if ($conf['compress']) {
                        $encodings = isset($_SERVER['HTTP_ACCEPT_ENCODING']) ? explode(',', strtolower(preg_replace("/\s+/", "", $_SERVER['HTTP_ACCEPT_ENCODING']))) : array();
                        if ($conf['gzip_compress'] && (in_array('gzip', $encodings) || in_array('x-gzip', $encodings) || isset($_SERVER['---------------'])) && function_exists('gzencode') && !ini_get('zlib.output_compression')) {
                                $enc = in_array('x-gzip', $encodings) ? 'x-gzip' : 'gzip';
                                $supportsGzip = true;
                                $key = 'gzip-'.$key;
                        }
                }
                $content = null;
                $cache = cache::getInstance($this->cfg->cache);
                $cacheDate = $cache->get($content, array('id'=>$key));
                
                if (!$conf['disk_cache'] || !$cacheDate) {
                        foreach($prm as $file) {
                                $f = file::nyroExists(array(
                                                                'name'=>'module_'.nyro::getCfg()->compressModule.'_'.$type.'_'.$file,
                                                                'type'=>'tpl',
                                                                'tplExt'=>$type
                                                        ));
                                if ($f) {
                                        if ($conf['php'])
                                                $content.= file::fetch($f);
                                        else
                                                $content.= file::read($f);
                                }
                        }
                        
                        if ($conf['compress']) {
                                if ($type == 'js') {
                                        lib::load('jsMin');
                                        $content = JSMin::minify($content);
                                } else if ($type == 'css') {
                                        lib::load('cssMin');
                                        $content = CssMin::minify($content, $conf['filters'], $conf['plugins']);
                                }
                                if ($supportsGzip)
                                        $content = gzencode($content, 9, FORCE_GZIP);
                        }
                        $cache->save();
                } else if ($cacheDate) {
                        $resp->addHeader('Age', time() - $cacheDate);
                }
                
                /* @var $resp response_http */
                if ($conf['compress']) {
                        $resp->setCompress(false);
                        $resp->addHeader('Vary', 'Accept-Encoding'); // Handle proxies
                        if ($conf['etags'] || preg_match('/MSIE/i', $_SERVER['HTTP_USER_AGENT'])) {
                                // We need to use etags on IE since it will otherwise always load the contents
                                $resp->addHeader('ETag', md5($content));
                        }
                        $parseTime = $this->_parseTime($conf['expires_offset']);
                        $resp->addHeader('Expires', gmdate('D, d M Y H:i:s', time() + $parseTime).' GMT');
                        $resp->addHeader('Cache-Control', 'public, max-age='.$parseTime);
                        
                        if ($type == 'js') {
                                // Output explorer workaround or compressed file
                                if (!isset($_GET['gz']) && $supportsGzip && $conf['patch_ie'] && strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false) {
                                        // Build request URL
                                        $url = $_SERVER['REQUEST_URI'];

                                        if (isset($_SERVER['QUERY_STRING']) && $_SERVER['QUERY_STRING'])
                                                $url.= '?'.$_SERVER['QUERY_STRING'].'&gz=1';
                                        else
                                                $url.= '?gz=1';

                                        // This script will ensure that the gzipped script gets loaded on IE versions with the Gzip request chunk bug
                                        echo 'var gz;try {gz = new XMLHttpRequest();} catch(gz) { try {gz = new ActiveXObject("Microsoft.XMLHTTP");}';
                                        echo 'catch (gz) {gz = new ActiveXObject("Msxml2.XMLHTTP");}}';
                                        echo 'gz.open("GET", "'.$url.'", false);gz.send(null);eval(gz.responseText);';
                                        die();
                                }
                        }
                        
                        if ($supportsGzip)
                                $resp->addHeader('Content-Encoding', $enc);     
                }
                
                $resp->sendText($content);
        }
        
        protected function _parseTime($time) {
                $multipel = 1;

                // Hours
                if (strpos($time, "h") != false)
                $multipel = 60 * 60;

                // Days
                if (strpos($time, "d") != false)
                $multipel = 24 * 60 * 60;

                // Months
                if (strpos($time, "m") != false)
                $multipel = 24 * 60 * 60 * 30;

                // Trim string
                return intval($time) * $multipel;
        }

}