http-consult.js

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

const responseData = {
  ID: 'zhangsan',
  Name: '张三',
  RegisterDate: '2020年3月1日',
};

function toHTML(data) {
  return `
    <ul>
      <li><span>账号：</span><span>${data.ID}</span></li>
      <li><span>昵称：</span><span>${data.Name}</span></li>
      <li><span>注册时间：</span><span>${data.RegisterDate}</span></li>
    </ul>
  `;
}

const server = http.createServer((req, res) => {
  const {pathname} = url.parse(`http://${req.headers.host}${req.url}`);
  if(pathname === '/') {
    const accept = req.headers.accept;
    if(req.method === 'POST' || accept.indexOf('application/json') >= 0) {
      res.writeHead(200, {'Content-Type': 'application/json'});
      res.end(JSON.stringify(responseData));
    } else {
      res.writeHead(200, {'Content-Type': 'text/html; charset=utf-8'});
      res.end(toHTML(responseData));
    }
  } else {
    res.writeHead(404, {'Content-Type': 'text/html'});
    res.end('<h1>Not Found</h1>');
  }
});

server.on('clientError', (err, socket) => {
  socket.end('HTTP/1.1 400 Bad Request\r\n\r\n');
});

server.listen(10080, () => {
  console.log('opened server on', server.address());
});