duoji-frontend/src/plugins/axios/axios.js

import Vue from 'vue';
import axios from 'axios';

const instance = axios.create({
    baseURL: process.env.VUE_APP_API_URL,
    timeout: 60 * 1000,
    headers: {
        'Content-Type': 'application/json;charset=UTF-8',
    },
    withCredentials: true,
});

instance.interceptors.request.use((config) => {
    const reqObj = config;
    // 在发送请求之前做些什么
    const reg = /\{(.+?)\}/g; // 匹配{}
    if (reg.test(reqObj.url)) {
        reqObj.url = reqObj.url.replace(reg, Object.values(reqObj.path)[0]);
    }
    if (sessionStorage.getItem('token')) {
        reqObj.headers.token = sessionStorage.getItem('token');
    }
    return reqObj;
}, (err) => Promise.reject(err));

instance.interceptors.response.use((response) => {
    if (!sessionStorage.getItem('token')) {
        sessionStorage.setItem('token', response.headers.token)
    }
    const res = response.data;
    // 对响应数据做点什么
    if (res.code !== 200) {
        console.log(res);
        Vue.prototype.$message.error(res.message);
        return Promise.reject(res.message);
    }
    return res;
}, (err) => Promise.reject(err));

export default instance;