const http = require('http');


const server = http.createServer((req, res) => {
    //手动设值请求头和输出格式等等
    res.writeHead(200, { 'Content-Type': 'application/json' });//'Content-Type': 'text/html; charset=UTF-8' 
    //浏览器输出
    res.end(JSON.stringify({
      data: 'Hello World!'
    }));
  });
  
  server.listen(8000);