nodeJS - How to create and read session with express

Question

I want to create a user sessison when user enter the app. And read the session whenever needed. Here is my try

var io   = require('socket.io'),
    express = require('express');
    querystring = require('querystring');

var app = express.createServer();
app.get('/', function(req, res){
    var sessionVal = querystring.parse(req.url.substr(2));// sessionVal is an email for example: [email protected]
    app.use(express.cookieParser());
    app.use(express.session({ secret: sessionVal }));
});
var socket = io.listen(app);
socket.on('connection', function(client) {
    client.on('message', function(message) {
        // message will be an object {text:'user text chat blah blah', email:'[email protected]'}
        // if the seesion stored, has the same value with message.email
        // then the message will be broadcasted
            socket.broadcast(message.text);
        // else will not broadcast  
    });
});

app.listen(4000);

This question is related to node.js

User · Answer

Steps I did     Include the angular-cookies js file in the HTML   Init cookies as being NOT http-only in server-side app  s    app configure function         a bunch of stuff    app use express cookieSession  secret   mySecret   store  store  cookie  cookieSettings         Then in client-side services jss I put   ngCookies   in like this    angular module  swrp     ngCookies      etc Then in controller js  in my function UserLoginCtrl  I have  cookies in there with  scope at the top like so   function UserLoginCtrl  scope   cookies  socket    Lastly  to get the value of a cookie inside the controller function I did    var mySession    cookies  connect sess       Now you can send that back to the server from the client  Awesome  Wish they would ve put this in the Angular js documentation  I figured it out by just reading the actual code for angular-cookies js directly

User · Answer

I forgot to tell a bug when i use I use req.session.email = req.param('email'), the server error says cannot sett property email of undefined.

The reason of this error is a wrong order of app.use. You must configure express in this order:

app.use(express.cookieParser());
app.use(express.session({ secret: sessionVal }));
app.use(app.route);

User · Answer

Hello I am trying to add new session values in node js like

req.session.portal = false
Passport.authenticate('facebook', (req, res, next) => {
    next()
})(req, res, next)

On passport strategies I am not getting portal value in mozilla request but working fine with chrome and opera

FacebookStrategy: new PassportFacebook.Strategy({
    clientID: Configuration.SocialChannel.Facebook.AppId,
    clientSecret: Configuration.SocialChannel.Facebook.AppSecret,
    callbackURL: Configuration.SocialChannel.Facebook.CallbackURL,
    profileFields: Configuration.SocialChannel.Facebook.Fields,
    scope: Configuration.SocialChannel.Facebook.Scope,
    passReqToCallback: true
}, (req, accessToken, refreshToken, profile, done) => {
    console.log(JSON.stringify(req.session));

User · Answer

It is cumbersome to interoperate socket io and connect sessions support  The problem is not because socket io  hijacks  request somehow  but because certain socket io transports  I think flashsockets  don t support cookies  I could be wrong with cookies  but my approach is the following    Implement a separate session store for socket io that stores data in the same format as connect-redis Make connect session cookie not http-only so it s accessible from client JS Upon a socket io connection  send session cookie over socket io from browser to server Store the session id in a socket io connection  and use it to access session data from redis

User · Answer

I need to point out here that you re incorrectly adding middleware to the application  The app use calls should not be done within the app get request handler  but outside of it  Simply call them directly after createServer  or take a look at the other examples in the docs   The secret you pass to express session should be a string constant  or perhaps something taken from a configuration file  Don t feed it something the client might know  that s actually dangerous  It s a secret only the server should know about   If you want to store the email address in the session  simply do something along the lines of   req session email   req param  email      With that out of the way       If I understand correctly  what you re trying to do is handle one or more HTTP requests and keep track of a session  then later on open a Socket IO connection from which you need the session data as well   What s tricky about this problem is that Socket IO s means of making the magic work on any http Server is by hijacking the request event  Thus  Express   or rather Connect s  session middleware is never called on the Socket IO connection   I believe you can make this work  though  with some trickery   You can get to Connect s session data  you simply need to get a reference to the session store  The easiest way to do that is to create the store yourself before calling express session      A MemoryStore is the default  but you probably want something    more robust for production use  var store   new express session MemoryStore  app use express session   secret   whatever   store  store        Every session store has a get sid  callback  method  The sid parameter  or session ID  is stored in a cookie on the client  The default name of that cookie is connect sid   But you can give it any name by specifying a key option in your express session call    Then  you need to access that cookie on the Socket IO connection  Unfortunately  Socket IO doesn t seem to give you access to the http ServerRequest  A simple work around would be to fetch the cookie in the browser  and send it over the Socket IO connection   Code on the server would then look something like the following   var io        require  socket io        express   require  express     var app      express createServer        socket   io listen app       store    new express session MemoryStore  app use express cookieParser     app use express session   secret   something   store  store       app get      function req  res      var old   req session email    req session email   req param  email       res header  Content-Type    text plain      res send  Email was      old       now is      req session email               socket on  connection   function client         We declare that the first message contains the SID       This is where we handle the first message    client once  message   function sid        store get sid  function err  session          if  err     session               Do some error handling  bail          return                    Any messages following are your chat messages        client on  message   function message            if  message email     session email              socket broadcast message text                                          app listen 4000     This assumes you only want to read an existing session  You cannot actually create or delete sessions  because Socket IO connections may not have a HTTP response to send the Set-Cookie header in  think WebSockets    If you want to edit sessions  that may work with some session stores  A CookieStore wouldn t work for example  because it also needs to send a Set-Cookie header  which it can t  But for other stores  you could try calling the set sid  data  callback  method and see what happens

[node.js] nodeJS - How to create and read session with express

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