socket.io(サーバ側)からexpressのセッションを取得

get-session-test.js

const io = require('socket.io')(http);
const session = require('express-session');
const RedisStore = require('connect-redis')(session);
const cookie = require('cookie');
const cookieParser = require('cookie-parser');
const inspect = require('util').inspect;

const store = new RedisStore();
const sessionCookieName = 'sid';
const sessionSecret = 'hoge';

io.sockets.on('connection', socket => {
	console.log(`connect: id=${socket.id}`);

	const cookies = cookieParser.signedCookies(cookie.parse(socket.request.headers.cookie), sessionSecret);
	store.get(cookies[sessionCookieName], (err, session) => {
		console.log(`session: ${inspect(session)}`);
	});
});

express側のコードは省略