187 lines
3.5 KiB
JavaScript
187 lines
3.5 KiB
JavaScript
/*!
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* express-session
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* Copyright(c) 2010 Sencha Inc.
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* Copyright(c) 2011 TJ Holowaychuk
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* Copyright(c) 2015 Douglas Christopher Wilson
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* MIT Licensed
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*/
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'use strict';
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/**
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* Module dependencies.
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* @private
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*/
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var Store = require('./store')
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var util = require('util')
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/**
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* Shim setImmediate for node.js < 0.10
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* @private
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*/
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/* istanbul ignore next */
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var defer = typeof setImmediate === 'function'
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? setImmediate
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: function(fn){ process.nextTick(fn.bind.apply(fn, arguments)) }
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/**
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* Module exports.
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*/
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module.exports = MemoryStore
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/**
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* A session store in memory.
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* @public
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*/
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function MemoryStore() {
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Store.call(this)
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this.sessions = Object.create(null)
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}
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/**
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* Inherit from Store.
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*/
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util.inherits(MemoryStore, Store)
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/**
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* Get all active sessions.
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*
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* @param {function} callback
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* @public
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*/
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MemoryStore.prototype.all = function all(callback) {
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var sessionIds = Object.keys(this.sessions)
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var sessions = Object.create(null)
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for (var i = 0; i < sessionIds.length; i++) {
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var sessionId = sessionIds[i]
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var session = getSession.call(this, sessionId)
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if (session) {
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sessions[sessionId] = session;
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}
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}
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callback && defer(callback, null, sessions)
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}
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/**
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* Clear all sessions.
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*
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* @param {function} callback
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* @public
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*/
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MemoryStore.prototype.clear = function clear(callback) {
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this.sessions = Object.create(null)
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callback && defer(callback)
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}
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/**
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* Destroy the session associated with the given session ID.
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*
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* @param {string} sessionId
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* @public
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*/
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MemoryStore.prototype.destroy = function destroy(sessionId, callback) {
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delete this.sessions[sessionId]
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callback && defer(callback)
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}
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/**
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* Fetch session by the given session ID.
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*
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* @param {string} sessionId
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* @param {function} callback
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* @public
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*/
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MemoryStore.prototype.get = function get(sessionId, callback) {
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defer(callback, null, getSession.call(this, sessionId))
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}
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/**
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* Commit the given session associated with the given sessionId to the store.
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*
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* @param {string} sessionId
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* @param {object} session
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* @param {function} callback
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* @public
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*/
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MemoryStore.prototype.set = function set(sessionId, session, callback) {
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this.sessions[sessionId] = JSON.stringify(session)
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callback && defer(callback)
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}
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/**
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* Get number of active sessions.
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*
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* @param {function} callback
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* @public
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*/
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MemoryStore.prototype.length = function length(callback) {
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this.all(function (err, sessions) {
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if (err) return callback(err)
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callback(null, Object.keys(sessions).length)
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})
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}
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/**
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* Touch the given session object associated with the given session ID.
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*
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* @param {string} sessionId
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* @param {object} session
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* @param {function} callback
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* @public
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*/
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MemoryStore.prototype.touch = function touch(sessionId, session, callback) {
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var currentSession = getSession.call(this, sessionId)
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if (currentSession) {
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// update expiration
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currentSession.cookie = session.cookie
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this.sessions[sessionId] = JSON.stringify(currentSession)
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}
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callback && defer(callback)
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}
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/**
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* Get session from the store.
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* @private
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*/
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function getSession(sessionId) {
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var sess = this.sessions[sessionId]
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if (!sess) {
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return
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}
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// parse
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sess = JSON.parse(sess)
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if (sess.cookie) {
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var expires = typeof sess.cookie.expires === 'string'
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? new Date(sess.cookie.expires)
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: sess.cookie.expires
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// destroy expired session
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if (expires && expires <= Date.now()) {
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delete this.sessions[sessionId]
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return
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}
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}
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return sess
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}
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