封装axios

import axios from 'axios';
import vMessage from '@/components/messageTips';
import qs from 'qs';
import router from '@/router';

const service = axios.create({
  // 请求超时时间
  // timeout: 3000
});
// 解决跨域时的OPTION请求
service.defaults.headers['Content-Type'] = 'application/x-www-form-urlencoded';

// 请求拦截器
service.interceptors.request.use(
  async config => {
    return config;
  },
  err => {
    console.log(err);
  }
);
service.interceptors.response.use(
  response => {
    if (response.status === 200) {
      return response;
    } else if (response.status === 207) {// 自己项目中的特殊错误码,可忽略
      router.push({
        name: 'login',
        query: {
          redirectUrl: location.href
        }
      });
    }
  },
  err => {
     return Promise.reject(err.request);
  }
);

const asyncGet = (url, params, config, errorExt) => {
  const obj = Object.assign({
    url: `${window.projectConfig.url}/${url}`,
    method: 'get',
    params
  }, config);
  return to(service(obj), errorExt);
};
const asyncDownload = (url, params, config, errorExt) => {
  const obj = Object.assign({
    url: `${window.projectConfig.url}/${url}`,
    method: 'get',
    params,
    responseType: 'arraybuffer'
  }, config);
  return to(service(obj), errorExt);
};
const asyncPost = (url, data, config, errorExt) => {
  const obj = Object.assign({
    url: `${window.projectConfig.url}/${url}`,
    method: 'post',
    data: qs.stringify(data)
  }, config);
  return to(service(obj), errorExt);
};
const asyncPut = (url, data, config, errorExt) => {
  const obj = Object.assign({
    url: `${window.projectConfig.url}/${url}`,
    method: 'put',
    data: qs.stringify(data)
  }, config);
  return to(service(obj), errorExt);
};
const asyncDelete = (url, params, config, errorExt) => {
  const obj = Object.assign({
    url: `${window.projectConfig.url}/${url}`,
    method: 'delete',
    params
  }, config);
  return to(service(obj), errorExt);
};

const to = (promise, errorExt = '未知错误') => {
  return promise
    .then(function (data) {
      return [null, data];
    })
    .catch(function (err) {
      if (errorExt) {
        Object.assign(err, { errorExt });
      }
      vMessage.error(`${err.errorExt} [ code：${err.status} ]`);
      return [err, undefined];
    });
};

const exportObj = {
  service,
  to,
  asyncGet,
  asyncPost,
  asyncPut,
  asyncDelete,
  asyncDownload
};

export default exportObj;

使用
1、main.js中定义全局axios

import selfAxios from '@/api/axiosConfig';
Vue.prototype.$http = selfAxios;

2、配合async/await

async login () {
	const [err, res] = await this.$http.asyncGet('api/v1.0/login', params);
	if (!err && res) {
		 if (res.data.success) {
		   ...
		 } else {
		  ...
		 }
	}
}