Spring Security Authentication using RestTemplate

Question

I have 2 spring web apps that provide 2 separate set of services. Web App 1 has Spring Security implemented using a user-based authentication.

Now, Web App 2 needs

Answer 1

The following will authenticate and return the session cookie:

String sessionCookie= restTemplate.execute(uri, HttpMethod.POST, request -> {
        request.getBody().write(("j_username=USER_NAME&j_password=PASSWORD").getBytes());
    }, response -> {
        AbstractClientHttpResponse r = (AbstractClientHttpResponse) response;
        HttpHeaders headers = r.getHeaders();
        return headers.get("Set-Cookie").get(0);
    });