request中获取域名

const http = require('http');

const server = http.createServer((req, res) => {
  const host = req.headers.host;
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end(`Host: ${host}`);
});

server.listen(3000, () => {
  console.log('Server running at http://localhost:3000/');
});

const http = require('http');

const server = http.createServer((req, res) => {
  const host = req.headers.host;
  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
  res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Host');
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end(`Host: ${host}`);
});

server.listen(3000, () => {
  console.log('Server running at http://localhost:3000/');
});