Как сохранить данные на клиенте после перезагрузки страницы?

var express = require('express');
var app = express();
var http = require('http').Server(app);
var mysql = require('mysql');
var session = require("express-session")({

    secret: 'boss',

    resave: true,

    saveUninitialized: true

});
var sharedsession = require("express-socket.io-session");



var connections=0,max_connections=5,port = 3000,maxhp=300000,hp=maxhp,x,msg,db;
var max_user_hp,user_hp,x2,email,nick;
var hour = 3600000;

let io = require('socket.io')(http, {
	
});

app.use(express.static(__dirname + '/client')); 
app.use(session);

 

// Use shared session middleware for socket.io

// setting autoSave:true

io.use(sharedsession(session, {

    autoSave:true

})); 




app.get('/', function(req,res) {
	res.sendFile(__dirname + '/client/public/auth.html');
});

app.get('/boss', function(req,res) {
	res.sendFile(__dirname + '/client/public/boss.html');
});

http.listen(port, function() {
	console.log('listening on *:' + port);
});

db = mysql.createConnection({
	host : 'localhost', 
	user : 'root', 
	password : '',
	database : 'game'
});

db.connect((err) => {
	if(err) console.log(err);
	console.log("Mysql connected");
});


io.on('connection', function(socket) {	

			//Контроль подключений	
			connections+=1;
			io.emit('connections', connections);
			
			console.log('connected client:' + connections);
			
			
			if(connections > max_connections) {
				
				socket.on('forceDisconnect', () => {
						socket.disconnect(true);
						console.log('Server full!' + max_connections + '/' + max_connections);
				});
			}
			
			socket.on( 'disconnect', () => { 
				connections -= 1; 
				console.log( 'client disconnected:' + connections);
				io.emit('connections', connections);
				io.emit('server full', 'Вы отключены от сервера!');
			});
			//io.set("reconnection limit", 5000);
			//end 
			
			
			//Хп босса
			socket.on('boss fight', function(data) {
					hp = hp-data;
					if(hp<=0) {
						hp = maxhp;
						io.emit('win');						
					}
					x = hp/maxhp*100;
   			io.emit('realtime hp', hp);
   			if(hp>0) io.emit('hp line width', x);
   			if(hp<=0) io.emit('hp line width', 0);
   			if(hp+user_hp <= 0) {
   				io.emit('draw');
   			}
   	});
   	socket.on('hp line for all', function(data) {
					x = hp/maxhp*100;
   			io.emit('realtime hp', hp);
   			io.emit('hp line width', x);
   			if(hp<=0) {
   				io.emit('hp line width', 0);
   				io.emit('win');
   			}
   			if(hp+user_hp <= 0) {
   				io.emit('draw');
   			}
   	});
   	//end
   	
   	
   	socket.handshake.session.maxhp = 300000;
   	max_user_hp = socket.handshake.session.maxhp;
   	socket.handshake.session.hp = max_user_hp;
   	user_hp = max_user_hp;
   	
   	//Хп игрока   	
   	socket.on('user fight', function(data) {
   		user_hp = user_hp-data;
   		if(user_hp<=0) {
   			user_hp = max_user_hp;
   			socket.emit('lose');
   		}
				x2 = user_hp/max_user_hp*100;
				socket.emit('user hp', user_hp);
				if(user_hp>0) socket.emit('user hp line width', x2);
   		if(user_hp<=0) socket.emit('user hp line width', 0);
   		if(hp+user_hp <= 0) {
   			socket.emit('draw');
   		}
   	});
   	
   	//io.sockets.connected[socket.id].emit('class', 'alert');
   	
   	socket.on('hp line for all', function(data) {
				x2 = user_hp/max_user_hp*100;
   		socket.emit('user hp line width', x2);
   		if(user_hp<=0) {
   			socket.emit('user hp line width', 0);
   			socket.emit('lose');
   		}
   		if(hp+user_hp <= 0) {
   			socket.emit('draw');
   		}
   	});
   		
   	//end
   		
   		
   	
   	//Чат
   	socket.on('chat message', function(data) {
   		msg = data;
   		io.emit('chat msg',msg);
   	});
   	//end
   	
   	
   	//Блокировка пользователей
   	socket.on('banned', function(data) {
   		var ban = '';
   		if(data == ban) {
   			io.emit('ban', 'Вы забанены!');
   			socket.disconnect(true);
   		}
   	});
   	//end
   	
   	
   	
   	//Регистрация
   	
   	socket.on('email', function(data) {
   		email = data;
   	});
   	socket.on('nick', function(data) {
   		nick = data;
   		console.log(data);
   	});
   	
   	socket.on('query', function(data) {
   		
   		db.query("INSERT INTO players (id,nickname,email) VALUES('','" + nick + "','" + email +  "')", (err,result) => {

     	if(err) console.log(err);

     	console.log("Insert");
  			});
			});

		 //end
});