Add secure flag to JSESSIONID cookie in spring automatically

Question

I have a tomcat application server that is behind a nginx. SSL terminates on the nginx. The Spring web-mvc application that is deployed on the tomcat should set the secure flag on the JSESSIONID. It would be cool if spring has some automatic detection for this so I don't get bothered during development because I don't have SSL there.

Is there a way to tell spring to set the flag automatically?

I use JavaConfig to setup the application and use Maven to create a deployable war-file.

I have checked this already, but this looks somehow ugly and static: set 'secure' flag to JSESSION id cookie

Answer 1

When you use spring-session, e.g. to persist your session in reddis, this is indeed done automatically. The cookie is than created by org.springframework.session.web.http.CookieHttpSessionStrategy which in CookieHttpSessionStrategy#createSessionCookie checks if the request comes via HTTPS and sets secure accordingly:

sessionCookie.setSecure(request.isSecure());

If you do not use spring-session, you can configure secure cookies using a ServletContextInitializer. Use a application property, to set it to true/false depending on a profile.

@Bean
public ServletContextInitializer servletContextInitializer(@Value("${secure.cookie}") boolean secure) {
    return new ServletContextInitializer() {

        @Override
        public void onStartup(ServletContext servletContext) throws ServletException {
            servletContext.getSessionCookieConfig().setSecure(secure);
        }
    };
}

application.properties (used in dev when profile 'prod' is not active):

secure.cookie=false

application-prod.properties (only used when profile 'prod' is active, overwrites value in application.properties):

secure.cookie=false

start your application on the prod server with :

--spring.profiles.active=prod

Sounds like some effort, if you have not worked with profiles so far, but you will most likely need a profile for prod environment anyway, so its really worth it.

Answer 2

If you are using Spring Boot, there is a simple solution for it. Just set the following property in your application.properties:

server.servlet.session.cookie.secure=true

Source: Spring docs - Appendix A. Common application properties

If you have some environment with HTTPS and some without it, you will need to set it to false in profiles without HTTPS. Otherwise the Secure cookie is ignored.