Detailed explanation of axios encapsulation fetch call

This time I will bring you a detailed explanation of the axios encapsulated fetch call. What are the precautions for axios encapsulated fetch? The following is a practical case, let's take a look.

For basic axios usage, please see the axios official website

//依赖于axios对私有ajax进行修改
import Qs from 'qs'
import axios from 'axios'
import router from 'router/index'
import {errorPrompt, loading, closeLoading} from 'util/util'
export const status = {
 SUCCESS: '100',
 NET_ERR: '101', // 网络连接异常，请稍候再试
 BIZ_ERR: '103', // 业务请求异常
 NO_AUTH: '104'
}
export function fetch(options) {
 return new Promise((resolve, reject) => {
 let instance = axios.create({
  baseURL: process.env.BASE_API,
  timeout: 2000,
  headers: {
  // "tracecode": window.encodeURIComponent(JSON.stringify({"ua":"","cv":"20161230","token":"3dwo0onUUsPKVJcP8tk","os":"windows10","app":"kind","ws":"1*1","pkey":"f8caf7d7-a5d4-4710-b06f-28a922b6a467"}))
  "tracecode": commonBizHeader(isManager(options)),
  'Content-Type': 'application/x-www-form-urlencoded'
  },
  transformRequest: [function (data) {
  // Do whatever you want to transform the data
  let ret = ''
  for (let it in data) {
   ret += encodeURIComponent(it) + '=' + encodeURIComponent(data[it]) + '&'
  }
  return ret
  }]
 });
 instance.interceptors.request.use(function (response) {
  // 请求拦截
  loading();
  return response;
 }, function (error) {
  console.log('error 请求拦截 : ', error)
  return Promise.reject(error);
 });
 instance(options)
  .then(response => {
   const res = response.data;
   if (res.errorCode != status.SUCCESS) {
   switch (res.errorCode) {
    case status.NET_ERR: {
    errorPrompt(res.errorMsg)
    reject(res)
    break;
    }
    case status.BIZ_ERR: {
    errorPrompt(res.errorMsg)
    reject(res)
    break;
    }
    case status.NO_AUTH: {
    errorPrompt(res.errorMsg)
    let session = require("storejs")
    if (isManager(options)) { // 管理端
     session.remove("managerUserToken")
     router.push({path: '/manager/login'})
    } else {
     session.remove("clientUserToken")
     router.push({path: '/client/login'})
    }
    reject(res)
    break
    }
   }
   }
   closeLoading();
   resolve(res);
  }).catch(error => {
   closeLoading();
   errorPrompt('网络连接错误，请检查您的网络')
   console.log('error', error); // for debug
   reject(error);
  });
 });
}
function commonBizHeader (isManager) {
 let session = require("storejs");
 let params = {}
 params['ua'] = window.navigator.userAgent.toLowerCase()
 params['cv'] = '123456'
 params['ws'] = window.screen.height + '*' + window.screen.width
 params['token'] = "123456"
 params['os'] = window.navigator.appCodeName
 if (isManager) {
 params['token'] = session.get('managerUserToken') // 管理 - 用户令牌
 } else {
 params['token'] = session.get('clientUserToken') // 用户 - 用户令牌
 }
 params['app'] = 'kind'
 let UUID = session.get('pkey')
 if (!UUID) {
 UUID = getUUID()
 window.localStorage.setItem('pkey', UUID)
 }
 return encodeURIComponent(JSON.stringify(params))
}
function isManager(options) {
 return options && options.url && options.url.indexOf("/api/worker") != -1
}
/**
 * 获取UUID
 * @returns {string}
 */
export function getUUID() {
 let len = 32 // 32长度
 let radix = 16 // 16进制
 let chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
 let uuid = []
 let i
 radix = radix || chars.length
 if (len) {
 for (i = 0; i < len; i++) {
  uuid[i] = chars[0 | Math.random() * radix]
 }
 } else {
 var r
 uuid[8] = uuid[13] = uuid[18] = uuid[23] = &#39;-&#39;
 uuid[14] = &#39;4&#39;
 for (i = 0; i < 36; i++) {
  if (!uuid[i]) {
  r = 0 | Math.random() * 16
  uuid[i] = chars[(i === 19) ? (r & 0x3) | 0x8 : r]
  }
 }
 }
 return uuid.join(&#39;&#39;).toLowerCase()
}

This is in the vue project: the calling method in the api is as follows (react has just started I am still doing a simple demo)

import {fetch} from 'api/fetch'
export const callAuthCode = (userPhone) => {
 return fetch({
 url: '/api/auth/code',
 method: 'post',
 data: ({
  userPhone: userPhone,
 }),
 })
}

Because our backend requires strict distinction between get/

post requests, so the encapsulated method call must contain method, if the backend has processed it OK, all post requests can be made, you can refer to the axios official website and change all methods to .post

Explanation on the fetch method: It mainly encapsulates request interception and response interception. The default request body is converted from json format. form format, of course, these can be found on the axios official website, but they are just collected. Please do not apply the request header directly. This is a special configuration required by our backend, and the backend interface Three terminals are shared, and it is necessary to distinguish where to call

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to the php Chinese website

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