import axios from ‘axios‘;
// req拦截
axios.interceptors.request.use(
  let token = localStorage.getItem(‘token‘)
    config => {
        if (token === null) {  // 判断是否存在token，如果存在的话，则每个http header都加上token
            config.headers.Authorization = `${token}`;
        }
        return config;
    },
    err => {
        return Promise.reject(err);
    });

// res拦截
axios.interceptors.response.use(
    response => {
        return response;
    },
    error => {
        if (error.response.code === 401) {
            // 返回 401 跳转到登录页面
            router.replace({
                path: ‘login‘,
                query: {redirect: router.currentRoute.fullPath}
            })
        }
        return Promise.reject(error.response.msg)   // 返回接口返回的错误信息
    });