[MVC2 게시판] 6. 접근 제한 걸기(Filter 이용)

<오늘 배운 것>

1) web.xml에 매핑하기

경로: WebContent > WEB-INF > web.xml

 
<filter>
            <filter-name>loginCheck</filter-name>
            <filter-class>com.model2.filter.LoginCheck</filter-class>
</filter>
<filter-mapping>
            <filter-name>loginCheck</filter-name>
            <url-pattern>*.dml</url-pattern>
            <!-- 요청 끝에 .dml이 오면 LoginCheck Filter에 들린다. -->
</filter-mapping>
 

2) Filter를 구현

 
public class LoginCheck implements Filter{
 
            @Override
            public void destroy() {                 
            }
 
            @Override
            public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                                    throws IOException, ServletException {
                        System.out.println("<<AdminCheck test>>");
                        HttpServletRequest httpReq = (HttpServletRequest)request;
                        HttpSession session = httpReq.getSession();
                        Object login = session.getAttribute("login");
                        boolean loginCheck = false;
                        if(login!=null){
                                    if((int)login>0){
                                                loginCheck = true;
                                    }
                        }
                        if(loginCheck){ //로그인O일 때
                                    chain.doFilter(request, response); //이걸 써야 목적지로 이동
                        }else{          //로그인X일 때
                                    RequestDispatcher dispatcher = request.getRequestDispatcher("/boardList.do");
                                    dispatcher.forward(request, response);
                        }           
            }
            @Override
            public void init(FilterConfig arg0) throws ServletException {              
            }
}