如何一个接一个地处理nodejs HTTP请求？

const http = require('http');

const server = http.createServer((req, res) => {
  // 在这里处理请求
});

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

const http = require('http');

const server = http.createServer((req, res) => {
  if (req.url === '/home' && req.method === 'GET') {
    // 处理首页请求
    res.statusCode = 200;
    res.setHeader('Content-Type', 'text/plain');
    res.end('Welcome to the homepage!');
  } else if (req.url === '/api/data' && req.method === 'POST') {
    // 处理API数据请求
    // ...
  } else {
    // 处理其他未知请求
    res.statusCode = 404;
    res.end('Not found');
  }
});

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

const http = require('http');

const server = http.createServer(async (req, res) => {
  try {
    const data = await processRequest(req); // 处理请求的异步函数
    res.statusCode = 200;
    res.setHeader('Content-Type', 'application/json');
    res.end(JSON.stringify(data));
  } catch (error) {
    res.statusCode = 500;
    res.end('Internal Server Error');
  }
});

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

async function processRequest(req) {
  // 异步处理请求的逻辑
  // ...
  return data;
}