socket.io

const Koa = require("koa");
const Router = require("koa-router");
const static = require("koa-static");
let app = new Koa();
let router = new Router();
app.use(static(__dirname+"/static"));

router.get("/text",ctx=>{
    ctx.body = "hello";
});

const server = require("http").createServer(app.callback());
const io = require("socket.io")(server);


//socket： 当建立连接后，传入回调函数中的参数
//         它代表当前连接者！！
io.on("connection",(socket)=>{
    console.log("有连接");
    let obj = {
        name:"隔壁老王的快乐生活",
        age:20
    }

    //传递数据
    // setInterval(()=>{
        // socket.emit("getData",obj);
    // },1000);
    
    socket.on("addData",(data)=>{
        console.log(data);

        socket.emit("getData",data);
    });

});

// console.log(__dirname);
// console.count(__filename);
app.use(router.routes());
server.listen(8989);