封装request.js

业务场景：前端一个项目可能需要调用多个后端服务，因此，前端设置多个拦截名，封装request.js，方便调用

import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
 class httpRequest {
  constructor({baseURL,withCredentials,headers = {},timeout}){
    this.config = {
      baseURL,
      withCredentials:withCredentials!== undefined ? withCredentials :true,
      timeout:timeout || 5000
    }
  }
  interceptors(){
    const service = axios.create(this.config)
    service.interceptors.request.use(
      config => {
        // do something before request is sent
  
        if (store.getters.token) {
          // let each request carry token
          // ['X-Token'] is a custom headers key
          // please modify it according to the actual situation
          config.headers['X-Token'] = getToken()
        }
        return config
      },
      error => {
        // do something with request error
        console.log(error) // for debug
        return Promise.reject(error)
      }
    )
    // response interceptor
    service.interceptors.response.use(
      /**
       * If you want to get http information such as headers or status
       * Please return  response => response
      */
  
      /**
       * Determine the request status by custom code
       * Here is just an example
       * You can also judge the status by HTTP Status Code
       */
      response => {
        const res = response.data
  
        // if the custom code is not 20000, it is judged as an error.
        if (res.code !== 20000) {
          Message({
            message: res.message || 'Error',
            type: 'error',
            duration: 5 * 1000
          })
  
          // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
          if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
            // to re-login
            MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
              confirmButtonText: 'Re-Login',
              cancelButtonText: 'Cancel',
              type: 'warning'
            }).then(() => {
              store.dispatch('user/resetToken').then(() => {
                location.reload()
              })
            })
          }
          return Promise.reject(new Error(res.message || 'Error'))
        } else {
          return res
        }
      },
      error => {
        console.log('err' + error) // for debug
        Message({
          message: error.message,
          type: 'error',
          duration: 5 * 1000
        })
        return Promise.reject(error)
      }
    )
    return service
  }
 }

export default  new httpRequest({baseURL:process.env.VUE_APP_BASE_API}).interceptors()
export const proxyapi =  new httpRequest({baseURL:process.env.VUE_APP_PROXY_API}).interceptors()

proxy:{
      [process.env.VUE_APP_PROXY_API]:{
        target:process.env.VUE_APP_PROXY_SERVE,
        pathRewrite:{
          ['^'+process.env.VUE_APP_PROXY_API]:''
        },
        ws: true,
        changeOrigin:true
      }
    },

import request, {proxyapi} from '@/utils/request'