Re: [Express-js] Sharing session with Socket.IO on different Node instances

[Brian Falk]

Probably because you're using MemoryStore...  If you fire off two different processes they won't share the same memory and hence the socket.io process won't find the sessionId.  I would try using Redis (connect-redis) or Mongo (express-mongodb) as the session store.

On Thu, May 30, 2013 at 4:42 AM, Michael Dilloway <bko...@gmail.com> wrote:

I have put together a quick script where Express and Socket.IO are initialised at the same time. I set session variables in Express and am able to successfully retrieve them from connecting sockets.

var express = require('express'),

app = express();

var oSessionStore = new express.session.MemoryStore({reapInterval: 60000 * 10});

var sCookieSecret = '11ULQWZQCO';

app.configure(function () {

app.set('views', __dirname + '/views');

app.set('view engine', 'jade');

app.use(express.bodyParser());

app.use(express.cookieParser(sCookieSecret));

app.use(express.session({store: oSessionStore}));

app.use(express.static(__dirname + '/public'));

app.use(express.logger('dev'));

});

require('./router')(app);

app.listen(8080);

var io = require('socket.io').listen(8081),

mysql = require('mysql');

io.set('log level', 1);

io.sockets.on('connection', function (socket) {

var oCookies = require('express/node_modules/cookie').parse(socket.handshake.headers.cookie);

var oSignedCookies = require('express/node_modules/connect/lib/utils').parseSignedCookies(oCookies, sCookieSecret);

var sSessionId = oSignedCookies['connect.sid'];

oSessionStore.get(sSessionId, function(err, session) {

console.log(err, session);

});

});

What I want is to have two separate scripts - One that initialises Express and one that initialises Socket.IO

var express = require('express'),

app = express();

var oSessionStore = new express.session.MemoryStore({reapInterval: 60000 * 10});

var sCookieSecret = '11ULQWZQCO';

app.configure(function () {

app.set('views', __dirname + '/views');

app.set('view engine', 'jade');

app.use(express.bodyParser());

app.use(express.cookieParser(sCookieSecret));

app.use(express.session({store: oSessionStore}));

app.use(express.static(__dirname + '/public'));

app.use(express.logger('dev'));

});

require('./router')(app);

app.listen(8080);

... and ...

var io = require('socket.io').listen(8081),

mysql = require('mysql'),

express = require('express');

var oSessionStore = new express.session.MemoryStore({reapInterval: 60000 * 10});

var sCookieSecret = '11ULQWZQCO';

io.set('log level', 1);

io.sockets.on('connection', function (socket) {

var oCookies = require('express/node_modules/cookie').parse(socket.handshake.headers.cookie);

var oSignedCookies = require('express/node_modules/connect/lib/utils').parseSignedCookies(oCookies, sCookieSecret);

var sSessionId = oSignedCookies['connect.sid'];

oSessionStore.get(sSessionId, function(err, session) {

console.log(err, session);

});

});

Suddenly Socket.IO fails to read the session and I have no idea why! Any ideas on what I'm doing wrong?

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[Michael Dilloway]

That makes sense! Thanks for the response