HTTP/1.1 500 Internal Server Error Content-Type: text/html; charset=UTF-8 Date: Thu, 19 Sep 2019 23:49:31 GMT X-Powered-By: Servlet/2.5 JSP/2.1 Content-Length: 883 Connection: Close
HTTP/1.1 503 Service Unavailable: Back-end server is at capacity Content-Length: 0 Connection: Close