一、搭建环境

• 新建空文件夹：Win + R进入cmd命令界面执行npm install express body-parser request
  

二、配置Nodejs

• 目录下新建index.js文件，并配置如下代码：

const express = require('express')
const bodyParser = require('body-parser')
const request = require('request')


const app = express()
const PORT = 5008

app.use(bodyParser.json())

app.get('/',(req,res)=>{
   
    res.send('Server is running!')
})

app.listen(PORT,()=>{
   
    console.log(`Server is running on localhost:${
     PORT}`);
})

• 启动Nodejs：在终端输入node index.js
  

三、与小程序交互

• 服务端代码实现：依旧在index.js文件中

// 小程序设置
const APP_ID = "wx4f9ef75353fd5bc3";
const APP_SECRET = "d9317db76db37df632d729ca0bdf1f2a";

// 获取access_token
app.get("access_token", (req, res) => {
   
  const url = `https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=${
     APP_ID}&secret=${
     APP_SECRET}`;
  request.get(url, (error, response, body) => {
   
    if (!error && response.statusCode === 200) {