NodeJs调用微信AccessToken

const rp = require('request-promise')
const fs = require('fs')
const path = require('path')
const fileName = path.resolve(__dirname, './access_token.json')
const APPID = '小程序的appid'
const APPSECRET = '小程序的密钥'
const URL = `https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=${APPID}&secret=${APPSECRET}`

const updateAccessToken = async () => {
  const resStr = await rp(URL)//发送请求
  const res = JSON.parse(resStr)
  if (res.access_token) {
    //写入
    fs.writeFileSync(//在当前目录把acesstoken写入json文件
      fileName,
      JSON.stringify({
        access_token: res.access_token,
        createtime: new Date()
      })
    )
  } else {
    await updateAccessToken()
  }
}

const getAccessToken = async () => {
  try {
    const readRes = fs.readFileSync(fileName, 'utf8')
    const readObj = JSON.parse(readRes)
    const createTime = new Date(readObj.createtime).getTime()
    const nowTime = new Date().getTime()
    if ((nowTime - createTime) / 1000 / 60 / 60 >= 2) {
      await updateAccessToken()
      await getAccessToken()
    }
    return readObj.access_token
  } catch (error) {
    await updateAccessToken()
    await getAccessToken()
  }
}
setInterval(async () => {
  await updateAccessToken()
}, (7200 - 300) * 1000)

module.exports = getAccessToken