Using Redis

basic_redis.js

var express = require('express'),
	redis = require('redis'),
	logger = require('morgan'),
	bodyParser = require('body-parser');

var client = redis.createClient(),//CREATE REDIS CLIENT
	app = express();

app.use(logger("tiny"));
app.use(bodyParser.urlencoded({ extended: false }))
app.use(bodyParser.json())

var router = express.Router();

//GET KEY'S VALUE
router.get('/redis/get/:key', function(req, response) {
	client.get(req.params.key, function (error, val) {
		if (error !== null) console.log("error: " + error);
		else {
			response.send("The value for this key is " + val);
		}
	});
});

//SET KEY'S VALUE
router.get('/redis/set/:key/:value', function(req, response) {
	client.set(req.params.key, req.params.value, function (error, result) {
		if (error !== null) console.log("error: " + error);
		else {
			response.send("The value for '"+req.params.key+"' is set to: " + req.params.value);
		}
	});
});

app.use('/', router);
var server = app.listen(8097, function() {
	console.log('BASIC REDIS server is listening on port %d', server.address().port);
});

express_session.js

var express = require('express'),
	logger = require('morgan'),
	bodyParser = require('body-parser'),
	cookieParser = require('cookie-parser'),
	expressSession = require('express-session');

var app = express();
app.use(logger("tiny"));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(cookieParser('yousecretcode'));
app.use(expressSession({secret: 'yourothersecretcode', saveUninitialized: true, resave: true}));

var router = express.Router();

router.get('/session/set/:value', function(req, res) {
	req.session.mySession = req.params.value;
	res.send('session write success');
});

app.get('/session/get/', function(req, res) {
	if(req.session.mySession)
		res.send('the session value is: ' + req.session.mySession);
	else
		res.send("no session value");
});

app.use('/', router);
var server = app.listen(8097, function() {
	console.log('BASIC SESSION server is listening on port %d', server.address().port);
});

redis_session.js

var express = require('express'),
	redis = require('redis'),
	cookieParser = require('cookie-parser'),
	session = require('express-session'),
	redisStore = require('connect-redis')(session),
	logger = require('morgan'),
	bodyParser = require('body-parser');

var client = redis.createClient(),//CREATE REDIS CLIENT
	app = express();

app.use(cookieParser('yoursecretcode'));
app.use(session(
	{
		secret: 'yourothersecretcode', 
		store: new redisStore({ host: 'localhost', port: 6379, client: client }),
		saveUninitialized: false, // don't create session until something stored,
		resave: false // don't save session if unmodified
	}
));
  
app.use(logger("tiny"));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

var router = express.Router();

router.get('/session/set/:value', function(req, res) {
	req.session.redSession = req.params.value;
	res.send('session written in Redis successfully');
});

app.get('/session/get/', function(req, res) {
	if(req.session.redSession)
		res.send('the session value stored in Redis is: ' + req.session.redSess);
	else
		res.send("no session value stored in Redis ");
});

app.use('/', router);
var server = app.listen(8097, function() {
	console.log('REDIS SESSION server is listening on port %d', server.address().port);
});