如何使用css创建node.js html服务器

const http = require('http');
const fs = require('fs');
const url = require('url');
const path = require('path');

const server = http.createServer((req, res) => {
  // 服务器逻辑
});

const parsedUrl = url.parse(req.url);
const pathname = parsedUrl.pathname;

const filePath = (pathname === '/') ? '/index.html' : pathname;

const absolutePath = path.join(__dirname, filePath);
fs.readFile(absolutePath, (err, data) => {
  // 文件读取逻辑
});

if (err) {
  res.writeHead(404, { 'Content-Type': 'text/plain' });
  res.end('404 Not Found');
} else {
  // 文件发送逻辑
}

const extname = path.extname(absolutePath);
const contentType = getContentType(extname);
res.writeHead(200, { 'Content-Type': contentType });
res.end(data);

function getContentType(extname) {
  switch (extname) {
    case '.html':
      return 'text/html';
    case '.css':
      return 'text/css';
    case '.js':
      return 'text/javascript';
    case '.png':
      return 'image/png';
    case '.jpg':
      return 'image/jpeg';
    default:
      return 'application/octet-stream';
  }
}

node server.js