Piwik\ProxyHttp::getCompressionEncodingAcceptedByClient PHP Method

    private static function getCompressionEncodingAcceptedByClient()
    {
        $acceptEncoding = $_SERVER['HTTP_ACCEPT_ENCODING'];
        if (preg_match(self::DEFLATE_ENCODING_REGEX, $acceptEncoding, $matches)) {
            return array('deflate', '.deflate');
        } elseif (preg_match(self::GZIP_ENCODING_REGEX, $acceptEncoding, $matches)) {
            return array('gzip', '.gz');
        } else {
            return array(false, false);
        }
    }