axios拦截器的使用

简事 2020-11-11 11:46:29
html5 javascript Vue.js axios prototype


简单封装axios,使用请求拦截器设置token;使用响应拦截器拦截后台返回的错误码,并且判断token是否过期;

main.js引入封装的axios,并加在原型上;

// 引入axios
import http from "@utils/http.js";
Vue.prototype.axios = http;

封装后的axios(比较简单,希望对你有帮助)

/**
* 封装axios
* 创建一个qs转义的axios,加在原型上,创建一个普通的axios,供其他请求使用
* 请求拦截,设置头部token
* 响应拦截,拦截后台返回的错误信息
* 判断token是否过期,过期跳转到登录页面
*/
// 引入模块
import { Toast } from "vant";
import axios from "axios";
import router from "@/router.js";
import qs from "qs";
// 全局请求地址
const baseUrl = "http://192.168.3.6:8000";
// 创建qs转换参数格式,并加到http原型上(因后台特殊情况,此请求只有一次,即qsAxios可忽略)
let qsAxios = axios.create({
baseURL: baseUrl,
timeout: 3000,
// 可以通过设置一个 `baseURL` 便于为 axios 实例的方法传递相对 URL
transformRequest: [
function(data) {
// `transformRequest` 允许在向服务器发送前,修改请求数据
// 只能用在 'PUT', 'POST' 和 'PATCH' 这几个请求方法
return qs.stringify(data);
},
],
});
// 创建普通axios
let http = axios.create({
baseURL: baseUrl,
timeout: 3000,
});
http.qsAxios = qsAxios;
// axios请求拦截
http.interceptors.request.use(
(response) => {
var token = localStorage.getItem("token");
// 判断是否存在token,如果存在的话,则每个http header都加上token
if (token) {
response.headers["token"] = token;
}
return response;
},
(error) => {
return Promise.reject(error);
}
);
// axios响应拦截
http.interceptors.response.use(
(response) => {
console.log(response);
return response;
},
(error) => {
if (error.response) {
//跟后台约定好,设置不同的状态码,如果出现error.response出现undefined,查看后端是否被中间件提前拦截
switch (error.response.status) {
case 400:
Toast(error.response.data.msg);
break;
case 401:
Toast("登录信息已过期,请重新登录!");
router.replace({ path: "/login", name: "login" });
break;
case 404:
Toast("请求错误,请刷新后重试!");
break;
case 422:
Toast("参数错误,请稍后重试!");
break;
case 500:
Toast("请求错误,请刷新后重试!");
break;
}
}
return Promise.reject(error);
}
);
export default http;

使用

  1. 通过qs转义
this.axios.qsAxios.post("/test").then((res)=>{})
  1. 普通axios
this.axios.post("/test").then((res)=>{})
版权声明
本文为[简事]所创,转载请带上原文链接,感谢
https://my.oschina.net/clearcode/blog/4712386

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