sessions/examples/simple.js

NodeJS session management

/**
 * This example create a session handler stored in memory.
 *
 * - session1, session2 and another session are created
 * - session1 is refreshed (expire time updated) every second (to avoid expiration)
 * - after 5 seconds (defined in session handler creation) session2 expires
 * - when session2 expires, session1 refresh is stopped (interval cleared)
 * - the 3rd session will expire 3 seconds later (because on creation it was refreshed with 8 seconds instead of the 3)
 * - after another 5 seconds session1 expires
 *
 * You ca see 2 events on session handler (Sessions):
 * - expired: when a session expires
 * - expirecheck: when session handler will check expiration
 *
 * Session expiration check is not done by polling, but calculated based on
 * the next session to expire.
 **/
var sessions = require("../lib/sessions"),
    Sessions = new sessions(null, { expires: 5 }),
    intervalId = null;

Sessions.create("session1", function (_, session1) {
	console.log("* created session '%s'", session1.uid());

	intervalId = setInterval(function () {
		session1.refresh();
	}, 1000);

	Sessions.create("session2", function (_, session2) {
		console.log("* created session '%s'", session2.uid());

		Sessions.create(/* name automatically generated */ function (_, session3) {
			console.log("* created session '%s'", session3.uid());

			session3.refresh(8);
		});
	});
});

Sessions.on("expired", function (uid) {
	console.log("! session expired:", uid);

	if (intervalId !== null) {
		clearInterval(intervalId);
	}
});
Sessions.on("expirecheck", function () {
	console.log("* checking session expiration..");
});