How to retrieve port number from a tomcat server sitting behind a load-balancer

Question

Situation:

• My client has a Java web application deployed on a JBoss server, it is accessed both via HTTPS and HTTP
• The JBoss server is sitting behind a load-balancer that handles the SSL, in other words this load-balancer terminates SSL and sends requests to JBoss as plain HTTP

Problem I need to solve:

The web application deployed on JBoss needs to know what port the load-balancer is using for HTTPS , so that it can direct users to certain HTTPS urls correctly. This cannot be hard-coded because the application will be deployed on multiple clients, each of them have different configurations for the load-balancer.

My approach (which didn't work) :

I am defining the port from a jspx page, via ${pageContext.request.serverPort} , but this always returns the port for HTTP because JBoss always gets the request via HTTP.

Thanks in advance. I've looked at this question but was not helpful.

Answer 1

There isn't really a way to determine the port if tomcat is sitting behind a load balancer. As suggested in the comments, exposing the port configuration to your clients would be the best for now.