Spring MVC “redirect:” prefix always redirects to http — how do I make it stay on https?

Question

I solved this myself, but I spent so long discovering such a simple solution, I figured it deserved to be documented here.

I have a typical Spring 3 MVC setup with

Answer 1

Spring Boot provides this nice configuration based solution to this if you're running behind a proxy server, simply add these two properties to your application.properties file:

server.tomcat.remote_ip_header=x-forwarded-for
server.tomcat.protocol_header=x-forwarded-proto

This works for me deploying the otherwise unchanged spring-boot-sample-web-ui to Elastic Beanstalk behind an https load balancer. Without these properties the redirect on line 68 of the MessageController defaults to http and hangs.

Hope this helps.