Page 546 - Nodejs 교과서 개정2판

module.exports = (server, app, sessionMiddleware) => {
const io = SocketIO(server, { path: '/socket.io' });
app.set('io', io);
const room = io.of('/room');
const chat = io.of('/chat');

io.use((socket, next) => {
cookieParser(process.env.COOKIE_SECRET)(socket.request, socket.request.res, next);
sessionMiddleware(socket.request, socket.request.res, next);
});

...

chat.on('connection', (socket) => {
...
socket.on('disconnect', () => {
console.log('chat 네임스페이스 접속 해제');
socket.leave(roomId);
const currentRoom = socket.adapter.rooms[roomId];
const userCount = currentRoom ? currentRoom.length : 0;
if (userCount === 0) { // 접속자가 0명이면 방 삭제
const signedCookie = req.signedCookies['connect.sid'];
const connectSID = cookie.sign(signedCookie, process.env.COOKIE_SECRET);
axios.delete(`http://localhost:8005/room/${roomId}`, {
headers: {
Cookie: `connect.sid=s%3A${connectSID}`,
},
})
.then(() => {
console.log('방 제거 요청 성공');
})
.catch((error) => {
console.error(error);
});
} else {
socket.to(roomId).emit('exit', {
user: 'system',
chat: `${req.session.color}님이 퇴장하셨습니다.`,
});
}
});
});
};