node11-node的 http模块

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)