const http = require('http');

const server = http.createServer((req, res) => {
  if (req.method === 'POST') {
    let body = '';
    
    req.on('data', chunk => {
      body += chunk.toString();
    });
    
    req.on('end', () => {
      // 对于application/x-www-form-urlencoded格式
      const params = new URLSearchParams(body);
      const paramObj = Object.fromEntries(params);
      
      // 对于application/json格式
      // const paramObj = JSON.parse(body);
      
      console.log(paramObj);
      res.end('Data received');
    });
  }
});

server.listen(3000);

const express = require('express');
const app = express();

// 解析application/x-www-form-urlencoded
app.use(express.urlencoded({ extended: true }));

// 解析application/json
app.use(express.json());

app.post('/api', (req, res) => {
  console.log(req.body); // 包含所有POST参数
  res.send('Data received');
});

app.listen(3000);

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

const app = new Koa();
const router = new Router();

app.use(bodyParser());

router.post('/api', (ctx) => {
  console.log(ctx.request.body); // 包含所有POST参数
  ctx.body = 'Data received';
});

app.use(router.routes());
app.listen(3000);

// Express中限制请求体大小
app.use(express.json({ limit: '10mb' }));
app.use(express.urlencoded({ limit: '10mb', extended: true }));

// Express中处理多种内容类型
const bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));