node14-node实现登录和注册第一部分代码

const http = require('http');
const url = require('url')
const querystring = require('querystring')
let user={
    admin:123456
}
http.createServer((req,res)=>{
    let path,get,post
    //如果是get请求
    if(req.method=='GET'){
       let{pathname,query} = url.parse(req.url,true)
       path=pathname,
       get=query
       complete()
    //如果是POST请求
    }else if(req.method=='POST'){
        let arr=[]
        req.on('data',buffer=>{
            arr.push(buffer)
        })
        req.on('end',()=>{
            post=querystring.parse(Buffer.concat(arr).toString())
        })
        complete()
    }
    function complete(){
        res.writeHead(200,{
            "Content-Type":"text/plain;charset=utf-8"
        })
        if(path=='/login'){
            let {username,password}=get
            if(!user[username]){
                res.end(JSON.stringify({
                    err:1,
                    msg:"用户不存在"
                })
                )
            }else if(user[username]!=password){
                res.end(JSON.stringify({
                    err:1,
                    msg:"密码错误"
                })
                )
            }else{
                res.end(JSON.stringify({
                    err:0,
                    msg:"登录成功"
                })
                )
            }
        }else if(path=='/reg'){
        }else{
        }
    }
}).listen(8887);