How to implement third-party requests in vue

Vue implements third-party requests: 1. Import axios through "import axios from 'axios';"; 2. Place axios on the prototype chain; 3. Add a request interceptor with code such as "axios .interceptors.request.use(config => {...}".

##The operating environment of this tutorial: Windows 10 system, vue3 version, DELL G3 computer

How does vue implement third-party requests?

Request third-party data in vue--axios

1 axios - > Based on Promise object-> async & await

2 create phase-> Return Promise object-> The returned data can be directly deconstructed [Data processing]

To write The data imported into the instance (that is, the data used for page rendering) needs to be received using the configuration parameter data

3 import axios from 'axios';

4 axios imported and used multiple times -> Put axios on the prototype chain

import axios from 'axios';
Vue.prototype.axios = axios;

5 Alias ​​of the request method

• axios.request(config)

• axios.get(url[, config])

• ##axios.delete(url[, config])

• axios.head(url[, config])

• axios.options(url [, config])

##axios.post(url[, data[, config]])
axios.put(url[, data[, config]])

• ##axios.patch(url[, data[, config]] )

• 6 Interceptor

  // 添加请求拦截器
  axios.interceptors.request.use(config => {
    // 在发送请求之前做些什么
    return config;
  }, error => {
    // 对请求错误做些什么
    return Promise.reject(error);
  });
  
  // 添加响应拦截器
  axios.interceptors.response.use(response => {
    // 对响应数据做点什么
    return response;
  }, error => {
    // 对响应错误做点什么
    return Promise.reject(error);
  });

6.1 Request interception application

axios.interceptors.request.use(config => {
  // 在发送请求之前做些什么
  let token = sessionStorage.getItem('userTk');
  if (token) {
    config.headers.Authorization = token
  }
  return config
}, error => {
  // 对请求错误做些什么
  return Promise.reject(error);
});

6.2 Response interception application

axios.interceptors.response.use(response => {
  if (response.data.code === '200') {
    Auth.setToken(sessionStorage.getItem('userId'))
  }
  return response;
},
error => {
  console.warn(error);
  console.warn(error.response);
  if ((error.response.status && error.response.status === 401) || error.response.statusCode === 401) {
    // 已超时
    Auth.removeToken(sessionStorage.getItem('userId'));
    sessionStorage.clear();
    router.replace('/login')
    return Promise.reject('身份已过期,请重新登录！');
  }
  if(error.response && error.response.status === 500)
  return Promise.reject('服务异常，请稍后重试！');
});

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