小程序开发实现access_token统一管理

const cloud = require('wx-server-sdk')
cloud.init({
  env: cloud.DYNAMIC_CURRENT_ENV
})
const timeutil = require('./timeutil');
// 需要修改的配置项
const APPSECRET =  ''
const axios = require('axios');
const db = cloud.database();
// 定时刷新获取配置信息
const CONFIG = 'cloud-token';
// 获取TOKEN
const URL = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={APPID}&secret={APPSECRET}'
function getAccessToken(APPID,APPSECRET){
  let url = URL;
  url = url.replace('{APPID}',APPID)
  url = url.replace('{APPSECRET}',APPSECRET)
  return new Promise(function(resolve,reject){
    axios.get(url).then(function (response) {
      console.log(response);
      resolve(response)
    })
    .catch(function (error) {
      console.log(error);
      reject(error)
    });
  })
}
// 云函数入口函数
exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext()
  // 自动获取当前应用APPID
  var APPID = wxContext.APPID;
  return new Promise(function(resolve,reject){
    getAccessToken(APPID,APPSECRET).then(async res=>{
      console.log(res)
      let access_token = res.data.access_token;
      let ans =  await db.collection(CONFIG).doc('access_token').set({
        data:{
          value:access_token,
          _updateTime:timeutil.TimeCode()
        }
      })
      resolve(ans)
    })
  }) 
}

{
  "triggers": [
    {
      "name": "myTrigger",
      "type": "timer",
      "config": "0 0 * * * * *"
    }
  ]
}

function TimeCode() {
  var date = new Date();
  var year = date.getFullYear()
  var month = date.getMonth()   1
  var day = date.getDate()

  var hour = date.getHours()
  var minute = date.getMinutes()
  var second = date.getSeconds()

  return [year, month, day].map(formatNumber).join('-')   ' '   [hour, minute, second].map(formatNumber).join(':')
}
//获取日期
function _formatTime(time) {
  var date = time.getFullYear()   '年'   time.getMonth()   '月'   time.getDate()   '日'
  var ftime = time.getHours()   '时'   time.getMinutes()   '分'   time.getSeconds()   '秒'
  return date   ftime;
}
function TimeCodeYmd(){
  var date = new Date();
  var year = date.getFullYear()
  var month = date.getMonth()   1
  var day = date.getDate()

  return [year, month, day].map(formatNumber).join('-');
}
function formatNumber(n) {
  n = n.toString()
  return n[1] ? n : '0'   n
}
module.exports={
  TimeCode,
  TimeCodeYmd
}

const TOKEN = 'cloud-token';
//获取access_token 
  try {
    let tres = await db.collection(TOKEN).doc('access_token').get();
    access_token = tres.data.value;
    console.log(access_token)
  } catch (error) {
    console.log('--无token记录--')
    return {
      errCode:-1,
      errMsg:'数据库中无TOKEN信息'
    }
  }