axios 使用javascript 类封装

axios 使用javascript 类封装

创建request.js

创建axios实例，配置响应成功，失败，拦截器。在main.js中调用。使用axios。后面在service就可以直接调用。

import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})

// request interceptor
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)
  }
)

export default service

base.service.js 文件

这个文件主要用来配置所有请求基本方法，post，get，patch，delete，put。

还可以应用一定的工具类对数据进行为空的一个处理。

import axios from 'axios';
import { objCleanEmpty, objValueTrim } from '@/utils';

export default class BaseService {
  // 提供get请求方法
  static async get(url, params = {}, clearEmptyParams = true) {
    params = clearEmptyParams ? objCleanEmpty(objValueTrim(params)) : params;
    return axios.request({
      method: 'GET',
      url,
      params,
    });
  }

  // 提供post请求
  static async post(url, postData, clearEmptyData = true) {
    postData = clearEmptyData ? objCleanEmpty(objValueTrim(postData)) : objValueTrim(postData);
    return axios.post(url, postData);
  }

  // 提供patch请求
  static async patch(url, postData = {}, clearEmptyData = true) {
    postData = clearEmptyData ? objCleanEmpty(objValueTrim(postData)) : objValueTrim(postData);
    return axios.patch(url, objValueTrim(postData ?? {}));
  }

  // 提供put方法
  static async put(url, postData = {}, clearEmptyData = true) {
    postData = clearEmptyData ? objCleanEmpty(objValueTrim(postData)) : objValueTrim(postData);
    return axios.put(url, postData);
  }

  // 提供delete请求
  static async delete(url, postData = []) {
    return axios.delete(`${url}`, { body: postData });
  }
}

具体实际请求模块文件

login.service.js为例子：

import BaseService from './../base.service';

export class LoginService extends BaseService {
  static async loginApi(postData) {
    return BaseService.post('/admin/login', postData);
  }
}

具体实际调用：

这里就能体现使用类对象来封装的好处了，可以直接引入一个类即可，调用类具体的方法。

import { LoginService } from '@/services';//引入服务模块


//使用
LoginService.loginApi({
  username,
  password,
})
  .then((data) => {
    //响应数据对应的操作
  })
  .catch((err) => {
    // 请求失败对应的操作
  });