IM/src/main/java/com/zhentao/intercepoter/Userinterceptor.java

package com.zhentao.intercepoter;

import com.zhentao.config.NullLogin;
import com.zhentao.tool.TokenUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class Userinterceptor implements HandlerInterceptor {
    @Autowired
    private RedisTemplate<String,String> redisTemplate;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String requestURI = request.getRequestURI();
//        if (requestURI.startsWith("/user/login")||requestURI.startsWith("/user/register")){
//            return true;
//        }
        String token = request.getHeader("token");
        if (token==null){
            System.err.println("Token不能为空");
            return false;
        }
        HandlerMethod handlerMethod = (HandlerMethod) handler;
        NullLogin annotation = handlerMethod.getMethod().getAnnotation(NullLogin.class);
        System.err.println("自定义注解"+annotation);
        if (annotation!=null){
            return true;
        }
        String userIdFromToken = TokenUtils.getUserIdFromToken(token);
        System.err.println("解析后的ID："+userIdFromToken);
        String s = redisTemplate.opsForValue().get(userIdFromToken);
        if (s!=null){
            return true;
        }else {
            System.err.println("Token错误");
            return false;
        }
    }
}