Building Web Apps with Spring 5 and Angular

OAuth2 Implementation for Spring Web App

The following are some of the key building blocks of the OAuth2 implementation on Spring web app:

• CorsFilter: First and foremost, it will be required to configure CORS filter to allow Authorization to be passed in header. Following code represents the same:

        @Component        @Order(Ordered.HIGHEST_PRECEDENCE)        public class CorsFilter implements Filter {          @Override          public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {            final HttpServletResponse response = (HttpServletResponse) res;            response.setHeader("Access-Control-Allow-Origin", "*");            response.setHeader("Access-Control-Allow-Methods", "POST, PUT, GET, OPTIONS, DELETE");            response.setHeader("Access-Control-Allow-Headers", ...