gistfile1.java

public class HSTSFilter implements Filter{

  private static final Logger LOG = LoggerFactory.getLogger(HSTSFilter.class.getName());

  @Override
  public void init(FilterConfig filterConfig) throws ServletException {

  }

  @Override
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
      throws IOException, ServletException {

    try {
      HttpServletResponse servletResponse = (HttpServletResponse) response;
      //servletResponse.setHeader("Strict-Transport-Security", "max-age=31536000; includeSubDomains");
      chain.doFilter(request, response);
      servletResponse.setHeader("Strict-Transport-Security", "max-age=31536000; includeSubDomains");
    } catch (Exception e) {
      LOG.error(e.getMessage(), e);
    }
  }

  @Override
  public void destroy() {

  }
}