workerman http为什么不支持Transfer-Encoding=chunked的消息头

if ($pos = \strpos($header, "\r\nContent-Length: ")) {
            $length = $length + (int)\substr($header, $pos + 18, 10);
            $has_content_length = true;
        } else if (\preg_match("/\r\ncontent-length: ?(\d+)/i", $header, $match)) {
            $length = $length + $match[1];
            $has_content_length = true;
        } else {
            $has_content_length = false;
            if (false !== stripos($header, "\r\nTransfer-Encoding:")) {//
                $connection->close("HTTP/1.1 400 Bad Request\r\n\r\n", true);
                return 0;
            }
        }