javascript - how to use sessions in express, couchDB, and node.js - Stack Overflow

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so I basically want to use sessions to store the users name and check to see if the user logged in or not. If not, the page will redirect to the login page.

I am using Node.js,express,and couchDB.

Here is how i set up my session so far

var MemoryStore = require('connect').session.MemoryStore;
app.use(express.cookieParser());
app.use(express.session({ 
    secret: "keyboard cat", 
    store: new MemoryStore({ 
        reapInterval: 60000 * 10
    })
}));

To store something in the session, i use the following code right?

req.session = {user:name);

So the session variable seems to work on my login page. I successfully store the user's name into the session However, when I try to access the session variable on another page, it gives me the error

Cannot read property 'user' of undefined

all i'm doing is:

if (req.session.user){

Why is this error happening? are sessions not global to the whole app? Or am I missing something entirely here.

Thanks in advance!

so I basically want to use sessions to store the users name and check to see if the user logged in or not. If not, the page will redirect to the login page.

I am using Node.js,express,and couchDB.

Here is how i set up my session so far

var MemoryStore = require('connect').session.MemoryStore;
app.use(express.cookieParser());
app.use(express.session({ 
    secret: "keyboard cat", 
    store: new MemoryStore({ 
        reapInterval: 60000 * 10
    })
}));

To store something in the session, i use the following code right?

req.session = {user:name);

So the session variable seems to work on my login page. I successfully store the user's name into the session However, when I try to access the session variable on another page, it gives me the error

Cannot read property 'user' of undefined

all i'm doing is:

if (req.session.user){

Why is this error happening? are sessions not global to the whole app? Or am I missing something entirely here.

Thanks in advance!

• javascript
• session
• node.js
• express

Share Improve this question Follow edited Feb 16, 2013 at 4:21 Yasin Okumuş 2,38977 gold badges3333 silver badges6565 bronze badges asked Apr 8, 2011 at 18:09 Ernesto11Ernesto11 28111 gold badge33 silver badges66 bronze badges 1

• 2 The req.session = {user:name); part of your code is no longer correct. I assume this worked in an older version of express, but now to avoid an error, you will need to use req.session.user=name;. If you don't, methods on req.session will be overwritten. – twiz Commented Mar 16, 2013 at 21:42

Add a comment  | 

4 Answers 4

Sorted by: Reset to default 71

If you're doing app.use(app.router) before the lines that set up the cookie and session handling, try moving it to after them. That fixed the same problem for me.

I was trying to solve the exact same problem for he last few hour.

Try initializing your server like that:

var app = express.createServer(
express.cookieParser(),
express.session({ secret: "crazysecretstuff"})
  );

That should work.

I had same issue of getting undefined for session variable which I knew was set ok.

In my case it turned out to be caused by cross origin request, I had forgotten the withCredentials header on the request.

So for example in my client side Angular app I needed to do this:

var config = { withCredentials: true };
return $http.get(appConfig.apiUrl + '/orders', config);

and in Express this:

res.header('Access-Control-Allow-Credentials', true);

the sessionSecret in the configuration (config.json?) should be non-empty:

sessionSecret: "something other than an empty string",

so I basically want to use sessions to store the users name and check to see if the user logged in or not. If not, the page will redirect to the login page.

I am using Node.js,express,and couchDB.

Here is how i set up my session so far

var MemoryStore = require('connect').session.MemoryStore;
app.use(express.cookieParser());
app.use(express.session({ 
    secret: "keyboard cat", 
    store: new MemoryStore({ 
        reapInterval: 60000 * 10
    })
}));

To store something in the session, i use the following code right?

req.session = {user:name);

So the session variable seems to work on my login page. I successfully store the user's name into the session However, when I try to access the session variable on another page, it gives me the error

Cannot read property 'user' of undefined

all i'm doing is:

if (req.session.user){

Why is this error happening? are sessions not global to the whole app? Or am I missing something entirely here.

Thanks in advance!

so I basically want to use sessions to store the users name and check to see if the user logged in or not. If not, the page will redirect to the login page.

I am using Node.js,express,and couchDB.

Here is how i set up my session so far

var MemoryStore = require('connect').session.MemoryStore;
app.use(express.cookieParser());
app.use(express.session({ 
    secret: "keyboard cat", 
    store: new MemoryStore({ 
        reapInterval: 60000 * 10
    })
}));

To store something in the session, i use the following code right?

req.session = {user:name);

So the session variable seems to work on my login page. I successfully store the user's name into the session However, when I try to access the session variable on another page, it gives me the error

Cannot read property 'user' of undefined

all i'm doing is:

if (req.session.user){

Why is this error happening? are sessions not global to the whole app? Or am I missing something entirely here.

Thanks in advance!

• javascript
• session
• node.js
• express

Share Improve this question Follow edited Feb 16, 2013 at 4:21 Yasin Okumuş 2,38977 gold badges3333 silver badges6565 bronze badges asked Apr 8, 2011 at 18:09 Ernesto11Ernesto11 28111 gold badge33 silver badges66 bronze badges 1

• 2 The req.session = {user:name); part of your code is no longer correct. I assume this worked in an older version of express, but now to avoid an error, you will need to use req.session.user=name;. If you don't, methods on req.session will be overwritten. – twiz Commented Mar 16, 2013 at 21:42

Add a comment  | 

4 Answers 4

Sorted by: Reset to default 71

If you're doing app.use(app.router) before the lines that set up the cookie and session handling, try moving it to after them. That fixed the same problem for me.

I was trying to solve the exact same problem for he last few hour.

Try initializing your server like that:

var app = express.createServer(
express.cookieParser(),
express.session({ secret: "crazysecretstuff"})
  );

That should work.

I had same issue of getting undefined for session variable which I knew was set ok.

In my case it turned out to be caused by cross origin request, I had forgotten the withCredentials header on the request.

So for example in my client side Angular app I needed to do this:

var config = { withCredentials: true };
return $http.get(appConfig.apiUrl + '/orders', config);

and in Express this:

res.header('Access-Control-Allow-Credentials', true);

the sessionSecret in the configuration (config.json?) should be non-empty:

sessionSecret: "something other than an empty string",

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