axios的简单封装/LocalStorage/token/SessionStorage

sessionStorage的简单封装

前端配置跨越请求 搜索新建vue.config.js

LocalStorage

1. token存储

const { token } = res.data;
localStorage.setItem("eleToken", token);

2. 使用-验证

if (localStorage.eleToken){
        config.headers.Authorization = localStorage.eleToken} 
        //如果存在token添加到请求头

const { status } = error.response
    if (status == 401) {
        Message.error('token值无效，请重新登录')
        // 清除token
        localStorage.removeItem('eleToken')
    }

3. 解析token存储到vuex

npm install jwt-decode

const decode = jwt_decode(token);//解析token(创建时间、有效时间)

axios

1.axios基本请求

axios.get('/foo', params{ 'bar': 123 });

const qs = require('qs'); //npm install qs
axios.post('/foo', qs.stringify({ 'bar': 123 }));

2. 封装加载/状态码

import axios from 'axios'
import { Message, Loading } from 'element-ui';
import router from './router'

let loading        //定义loading变量

function startLoading() {    //使用Element loading-start 方法
    loading = Loading.service({
        lock: true,
        text: '加载中...',
        background: 'rgba(0, 0, 0, 0.7)'
    })
}
function endLoading() {    //使用Element loading-close 方法
    loading.close()
}

// 请求拦截  设置统一header
axios.interceptors.request.use(config => {
    // 加载
    startLoading()
    if (localStorage.eleToken)
        config.headers.Authorization = localStorage.eleToken
    return config
}, error => {
    return Promise.reject(error)
})

// 响应拦截  401 token过期处理
axios.interceptors.response.use(response => {
    endLoading()
    return response
}, error => {
    // 错误提醒
    endLoading()
    Message.error(error.response.data)

    const { status } = error.response
    if (status == 401) {
        Message.error('token值无效，请重新登录')
        // 清除token
        localStorage.removeItem('eleToken')

        // 页面跳转
        router.push('/login')
    }

    return Promise.reject(error)
})

export default axios