使用node写一个简单的页面操作

let http = require('http');
let urlStr = require('url');
let fs = require('fs');
let path = require('path');
http.createServer((req, res) => {

    const url = req.url;
    let pname = urlStr.parse(url, true).pathname;
    function name() {
        if (pname !== '/') {
            return path.extname(pname);
        }
    }
    if (pname === '/') {
        pname = '/index.html';
    }
    console.log(pname)
    if (pname !== '/favicon.ico') {
        fs.readFile('./html' + pname, function (err, data) {
            if(err){
                res.end('404')
            }else{
                res.writeHead(200, {
                    'content-type': 'text/' + name().split('.')[1] + ';charset=utf-8'
                });
                res.write(data.toString());
                res.end();
            }
        })
    }
}).listen(3000, function () {
    console.log('start');
})
// let fs = require('fs');
// fs.mkdir('/upload',function(err,files){
//     if(err){
//         console.log('目录已经存在')
//     }else{
//         console.log('创建成功');
//     }
// })