如何在中间件中获取请求体

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

const app = express();

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

app.use((req, res, next) => {
  // 获取请求体
  const requestBody = req.body;
  // 处理请求体
  // ...
  next();
});

// 其他路由和中间件

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

const Koa = require('koa');
const bodyParser = require('koa-bodyparser');

const app = new Koa();

app.use(bodyParser());

app.use(async (ctx, next) => {
  // 获取请求体
  const requestBody = ctx.request.body;
  // 处理请求体
  // ...
  await next();
});

// 其他路由和中间件

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});