# Coverage Summary for Class: AuthenticationFilter (cn.edu.ecnu.stu.bookstore.filter)

Class | Class, % | Method, % | Line, %
--- | --- | --- | ---
AuthenticationFilter | 100% (1/1) | 100% (3/3) | 100% (12/12)

     package cn.edu.ecnu.stu.bookstore.filter;

     import cn.edu.ecnu.stu.bookstore.pojo.User;
     import cn.edu.ecnu.stu.bookstore.utils.JwtUtil;
     import org.springframework.beans.factory.annotation.Autowired;
     import org.springframework.data.redis.core.RedisTemplate;
     import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
     import org.springframework.security.core.context.SecurityContextHolder;
     import org.springframework.stereotype.Component;
     import org.springframework.util.StringUtils;
     import org.springframework.web.filter.OncePerRequestFilter;

     import javax.servlet.FilterChain;
     import javax.servlet.ServletException;
     import javax.servlet.http.HttpServletRequest;
     import javax.servlet.http.HttpServletResponse;
     import java.io.IOException;

     @Component
     public class AuthenticationFilter extends OncePerRequestFilter {

         @Autowired
         private RedisTemplate redisTemplate;

         private boolean hasLogin(Integer userId) {
             String s = (String)redisTemplate.opsForValue().get("userId:" + userId);
             return StringUtils.hasText(s);
         }

         @Override
         protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
             String token = request.getHeader("token");
             if(!StringUtils.hasText(token)){
                 filterChain.doFilter(request, response);
                 return;
             }
             User user = (User) JwtUtil.getTokenInfo(token, User.class);
             if(!hasLogin(user.getId())) {
                 filterChain.doFilter(request, response);
                 return;
             }
             UsernamePasswordAuthenticationToken token1 = new UsernamePasswordAuthenticationToken(user, null, null);
             SecurityContextHolder.getContext().setAuthentication(token1);
             filterChain.doFilter(request, response);
         }
     }