109、商城业务---消息队列---订单登录拦截

我们希望订单服务下的所有页面都必须登陆后才能访问，所以我们使用拦截器来实现
1、编写我们自己的拦截器

package com.gulimall.order.interceptor;

import com.gulimall.common.constant.AuthServerConstant;
import com.gulimall.common.vo.MemberRespVo;
import org.springframework.web.servlet.HandlerInterceptor;

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

public class LoginUserInterceptor implements HandlerInterceptor {
    public static ThreadLocal<MemberRespVo> threadLocal = new ThreadLocal<>();

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        MemberRespVo attribute = (MemberRespVo) request.getSession().getAttribute(AuthServerConstant.LOGIN_USER);

        if (attribute == null){ //未登录
            request.getSession().setAttribute("msg", "请先进行登录!");
            response.sendRedirect("http://auth.gulimall.com/login.html");
            return false;
        }else { //已登录
            threadLocal.set(attribute);//放入threadLocal可以通用
            return true;
        }
    }
}

2、把我们的拦截器加入Spring中

package com.gulimall.order.config;

import com.gulimall.order.interceptor.LoginUserInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class GulimallWebConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginUserInterceptor()).addPathPatterns("/**"); //加入我们自己写的拦截器
    }
}

3、测试即可
如果未登录，就访问订单服务下的页面，就会跳转到登录页面。