我需要在login.jsp调用的登录servlet之前和之后实现一些逻辑。GateIn:用于登录servlet的过滤器
所以我写了一个URL /登录过滤器来做到这一点。我需要对某些操作的用户配置文件,所以我创造了这个LoginFilter类:
public class LoginFilter implements Filter {
private static Logger logger = Logger.getLogger(LoginFilter.class);
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
String username = httpRequest.getParameter("username");
String password = httpRequest.getParameter("password");
chain.doFilter(request, response);
PortalRequestContext context = PortalRequestContext.getCurrentInstance();
if (context == null)
logger.info("PortalRequestContext is NULL");
else {
String userId = context.getRemoteUser();
if (userId == null || userId.equals(""))
logger.info("Login failed, IP:" + httpRequest.getRemoteAddr());
else
logger.info("Login executed, username:" + userId);
}
}
的问题是,“上下文”(PortalRequestContext)总是空。我做错了什么?这是正确的方法吗?