Set request attribute from CustomeDigestAuthenticationFilter and access this attribute from spring controller for spring rest webservices

When we hit a rest api url using digest authentication it invokes DigestAuthenticationFilter.java class
We can customise this class for some custome verification like signature or certificate. Then we need to set a result attribute to request then we use the following code.

//CustomDigestAuthenticationFilter.java 


public class CustomDigestAuthenticationFilter extends DigestAuthenticationFilter {
    private static Logger logger = LoggerFactory.getLogger(CustomDigestAuthenticationFilter.class);
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
            throws IOException, ServletException {
        req.setAttribute("isVerified",true);
        super.doFilter(req, res, chain);
    }
}

Now we can access isVerified request attribute that set in filter class.

//AuthenticationController.java

@RestController
public class AuthenticationController {

    @Autowired
    private UserService userService;
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public @ResponseBody
    User authenticate(HttpServletRequest request) {
        User user =new User();
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        System.out.println("        Request Attribute        "+request.getAttribute("isVerified"));
        return user;
    }
}