const events=require("events");

emt=new events.EventEmitter();

function eventHandler(){

    console.log("111");

    console.log("222")

}

emt.on("eventName",eventHandler);

emt.emit("eventName");

function show(){

    this.name='user1';

    this.say=function(){

        console.log("my name is "+this.name);

    }

}

module.exports=new show();

const http=require("http");

const url=require("url");

cs=function(req,res){

    ur=req.url;

    if(ur!=="/favicon.ico"){

        //arr=url.parse(ur);

        //路由

        path=url.parse(ur).pathname;

        switch(path){

            case "/user/add":

                res.write("<h1>use add</h1>");

                break;

            case "/user/delete":

                res.write("<h1>use delete</h1>");

                break;

            case "/user/select":

                res.write("<h1>use select</h1>");

                break;

            default:

                res.write("<h1>hello~</h1>")

        }

    }

    //console.log(arr);

    res.write("hello world");

    res.end();

}

http.createServer(cs).listen(888);

console.log("server is ok");