1. let http = require('http')
    2. http.createServer(function (request, response) {
    3.     if (request.url !== '/favicon.ico') {
    4.         response.writeHead(200, {
    5.             'Content-Type':'text/html;charset=UTF-8',
    6.         })
    7.         response.write('hellow, salvater')
    8.         console.log('我在服务里面')
    9.         response.end() // 结束
    10.     }
    11. }).listen(5220)
    12. console.log(
    13.     'server: http://127.0.0.1:520'
    14. )