let http = require('http')
let fs = require('fs')
http.createServer((req,res)=>{console.log("我来了");console.log(req.url);res.end('index');fs.readFile(`${req.url}`,(err,data)=>{if(err){console.log(err)res.writeHead(404)res.end('404 not found')}else{res.end('demo1');}})
}).listen(8887)

运行结果