/**
* Is there a valid cache file we can use
*
* @return bool
*/
protected function getCacheFile()
{
$dir = $this->temp_dir . DIRECTORY_SEPARATOR . 'synergy';
$file = $dir . DIRECTORY_SEPARATOR . md5($this->request->getUri()) . '.syn';
if ($this->useGzip() && file_exists($file . '.gz') && date('U') - filemtime($file . '.gz') < $this->cache_expire) {
if (!headers_sent()) {
header('Content-Encoding: gzip');
header('X-Synergy-Cache: ' . basename($file . '.gz'));
}
readfile($file . '.gz');
return true;
} elseif (file_exists($file) && date('U') - filemtime($file) < $this->cache_expire) {
if (!headers_sent()) {
header('X-Synergy-Cache: ' . basename($file));
header('X-Synergy-Cached: ' . date('Y/m/d H:i:s', filemtime($file)));
}
readfile($file);
return true;
}
return false;
}
