基于axios封装fetch方法及调用实例

基础axios用法请看axios官网

//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] = '-'
 uuid[14] = '4'
 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('').tolowercase()
}

这是在vue的项目中：在api中调用方法如下(react刚开始学，还在做简单demo)

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

因为我们这边的后台要求严格区分get/post请求，所以封装的方法调用中必须带有method,如后台已经处理好，全部可进行post请求，则可以参照axios官网里面将方法全部改为.post

关于fetch方法的说明：主要进行封装了请求拦截，响应拦截，默认请求体由json格式转换form格式，当然，这些都是在axios官网里可以找到的，不过是集合下了而已

关于请求头部分请不要直接套用，这是我们这边后台要求特殊配置的，后台接口三端共用，必须区分是哪里在调用

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