1. if (path === "/") {
    2.     response.statusCode = 200;
    3.     response.setHeader("Content-Type", "text/html;charset=utf-8");
    4.     response.write(`
    5.       <!DOCTYPE html>
    6.       <head>
    7.       <link rel="stylesheet" href="/style.css">
    8.       </head>
    9.       <h1>哈哈哈</h1>
    10.       `);
    11.     response.end();
    12.   } else if (path === "/style.css") {
    13.     response.statusCode = 200;
    14.     response.setHeader("Content-Type", "text/css;charset=utf-8");
    15.     response.write(`h1{color: red;}`);
    16.     response.end();
    17.   } else {
    18.     response.statusCode = 404;
    19.     response.setHeader("Content-Type", "text/html;charset=utf-8");
    20.     response.write("你访问的页面不存在");
    21.     response.end();
    22.   }

    开启服务：node server.js 8888
    发请求：
    curl -v http://localhost:8888/
    curl -v -X post http://localhost:8888/