This is a SSCCE. Also posted in StackOverflow: https://stackoverflow.com/q/56500390/274677

I have a very simple Servlet that does nothing except print the value of a parameter:

    public class TestServlet extends HttpServlet{

        public void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

            final String URL = req.getParameter("url");

            System.out.printf("url parameter read as: [%s]\n", URL);

        }

    }

My application's web.xml is configured so as to automatically redirect http access to https:

<web-app>

     ...

    <security-constraint>

        <web-resource-collection>

            <web-resource-name>SECURE</web-resource-name>

            <url-pattern>/*</url-pattern>

        </web-resource-collection>

        <user-data-constraint>

            <transport-guarantee>CONFIDENTIAL</transport-guarantee>

        </user-data-constraint>

    </security-constraint>

</web-app>

and I also have in my `standalone-full.xml` configuration file:

<http-listener name="default" socket-binding="http" redirect-socket="https" enable-http2="true"/>

If I deploy to JBoss EAP 7.1 and enter the following URL in my browser (where the `url` parameter carries the URL-encoded value of "http://www.google.com"):

http://localhost:8082/get-parameter-test/min?url=http%3A%2F%2Fwww.google.com

This is what I see in my developer console:

As a result after the automatic redirect, my code fails to obtain the correct value of the `url` parameter and I see on the log files:

url parameter read as: [http%3A%2F%2Fwww.google.com]

However, if I deploy to JBoss EAP 6.2 and do the same, the URL is not mangled in the redirect and everything works fine: