axios模块化封装实例化及vue本地解决跨域方案

npm i axios -S

主机一:http://192.168.0.103:8020
   接口: /api/login
主机二: http://192.168.0.103:3000
   接口: /chen

----src
----.env.development
----.env.production
----.env.test

NODE_ENV = 'development'
//指定当前环境模式
VUE_APP_CURRENTMODE = 'development'
VUE_APP_BASE_URL = "http://192.168.0.103:8020"
VUE_APP_BASE_PL="http://192.168.0.103:3000"
VUE_APP_BASE_PLAPI="/chen"
VUE_APP_BASE_API="/api"

----src
-----network
------Instances(实例集合)
-------index.ts(引入实例)
-------Instance1.ts(实例1)
-------Instance2.ts(实例2)
------api.js(接口封装)

import axios from "axios";
export const Instance1 = (config: Object) => {
  const instance = axios.create({
    baseURL: process.env.VUE_APP_BASE_PLAPI,
    timeout: 900000,
  });
  instance.interceptors.request.use(
    (config) => {
      if (config.method === "get") {
        config.url = config.url + "?" + config.data;
      }
      if (sessionStorage.getItem("Authorization")) {
        config.headers.Authorization =
          "auth " + sessionStorage.getItem("Authorization");
      }
      // //console.log("请求拦截成功啦");
      // //console.log(config);
      return config;
    },
    (err) => {
      console.log("请求失败啦");
      console.log(err);
    }
  );
  //
  instance.interceptors.response.use(
    (res) => {
      return res.data;
    },
    (err) => {
      console.log("响应失败");
      console.log(err);
      // return err;
    }
  );
  return instance(config);
};

import axios from "axios";
import qs from "qs";
export const Instance2 = (config: Object) => {
  const instance = axios.create({
    baseURL: process.env.VUE_APP_BASE_API,
    timeout: 900000,
  });
  instance.interceptors.request.use(
    (config) => {
      if (config.method === "get") {
        config.url = config.url + "?" + qs.stringify(config.data);
      }
      if (sessionStorage.getItem("Authorization")) {
        config.headers.Authorization =
          "auth " + sessionStorage.getItem("Authorization");
      }
      // //console.log("请求拦截成功啦");
      // //console.log(config);
      return config;
    },
    (err) => {
      console.log("请求失败啦");
      console.log(err);
    }
  );
  //
  instance.interceptors.response.use(
    (res) => {
      return res.data;
    },
    (err) => {
      console.log("响应失败");
      console.log(err);
      // return err;
    }
  );
  return instance(config);
};

import { Instance1 } from "@/network/Instances/Instance1";
import { Instance2 } from "@/network/Instances/Instance2";
export { Instance1, Instance2 };

import { Instance1, Instance2 } from "@/network/Instances";
export const Chen = (value: any) => {
  return Instance1({
    url: "/chen",
    method: "post",
    // data: value, //传参方式一:缺点(如果这个接口在很多地方进行了调用,修改参数了,我们需要修改很多的地方)
    data: { password, account, code } //传参方式二:推荐传参方法,可以更好的维护
  });
};
export const Login2 = (value: any) => {
  return Instance2({
    url: "/login",
    method: "post",
    data: value,
  });
};

module.exports = {
  // 打包的时候去掉.map文件
  productionSourceMap: false,
  devServer: {
    proxy: {
      "/api": {
        target: process.env.VUE_APP_BASE_URL,
        changeOrigin: true,
        ws: true,
        pathRewrite: {
          "^/api": process.env.VUE_APP_BASE_URL + process.env.VUE_APP_BASE_API
        },
      },
      "/chen": {
        target: process.env.VUE_APP_BASE_PL,
        changeOrigin: true,
        ws: true,
        pathRewrite: {
          "^/chen": process.env.VUE_APP_BASE_PL
        },
      },
    }
  },
  chainWebpack: (config) => {
    // 开启eslint自动修复，关键代码
    config.module
      .rule("eslint")
      .use("eslint-loader")
      .loader("eslint-loader")
      .tap((options) => {
        options.fix = true;
        return options;
      });
  },
};