node.js:试试express

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npm i express

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const express = require('express');
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const app = express();

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const express = require('express');
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const singers = require('./singers.json').singers;
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const app = express();
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console.log(singers);
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app.get('/singers/:id', (req, res) => {
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let id = req.params.id;
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let singer = singers.find(singer => {
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    if(singer.id == id){
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        res.send(singer.name);
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    }
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});
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});
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app.listen(3000, () => {
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    console.log('Server is running on port 3000');
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});

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const express = require('express');
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const fs = require('fs');
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const app = express();
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const path = require('path');
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function recordMiddleware(req,res,next){
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    let {url,ip} =req;
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    console.log(`用户访问了${url}，IP地址为${ip}`);
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    fs.appendFile(path.resolve(__dirname, './access.log'), `${url} ${ip}\n`, (err) => {
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      if (err) {
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        console.log(err);
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      }
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    });
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    next();
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}
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function checkcoode(req,res,next){
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    let {code} = req.query;
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    if(code === '666')
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        next();
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    else
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        res.send('验证码错误');
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}
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app.use(express.static(path.resolve(__dirname, './')));
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app.use(recordMiddleware);
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//前台首页
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app.get('/home', checkcoode, (req, res) => {
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  res.send('首页你好');
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});
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app.get('/admin', checkcoode, (req, res) => {
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    res.send('后台管理你好');
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  });
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app.get('*', (req, res) => {
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    res.send('404 Not Found');
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});
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app.listen(3000, () => {
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  console.log('服务器启动成功，端口号为3000');
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});
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//后台首页

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const express = require('express');
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const app = express();
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const path = require('path');
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app.use((req, res, next) => {
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    let reffer = req.get('Referrer');
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    if(reffer){
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        let url = new URL(reffer);
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        let hostname = url.hostname;
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        console.log(hostname);
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        if(hostname !== '127.0.0.1'){
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            console.log('not 127');
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            res.status = 404;
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            res.end('Not Found');
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        }
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    }
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    next();
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})
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app.use(express.static(path.resolve(__dirname, './')));
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app.listen(3000, () => {
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    console.log('Server is running on port 3000');
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});