NodeJS + Express - Apply session middleware to some routes

Question

I have an Express application with some routes, only two of them need to support sessions. I read everywhere that the middleware definition (app.use(express.session({...) applies only to the routes that comes after it, so I created this sample: ``` var express = require('express'); var app = express(); app.use(express.bodyParser()); app.get('/path1', function (req, res) { res.send('text response'); }); app.use(express.cookieParser()); app.use(express.session({ secret: 'secret', cookie: { maxAge: new Date(Date.now() + 2 * 60 * 1000) } })); app.get('/path2', function (req, res) { res.session.test = { "test": "test" }; res.send('text response'); }); app.listen(8088); ``` But this doesn't work: in /path2 res.session is undefined. If I move the session middleware definition up - everything works, but I see that sessions are being create when calling /path1 (this is what I want to avoid) Can someone explain how a single application can use session in only some of the routes. Thanks! ///// U…

Accepted Answer

Don't use `app.use(express.session({ ... }))`.

Instead, initialize the session middleware, save a reference to the resulting function then include it directly in the routes you want it on.

```
var express = require('express'),
    app = express();

var session = express.session({
    //session configuration
});

app.use(app.router);

// must come after app.use(app.router);
app.get('/your/route/here', session, function(req, res){
    // code for route handler goes here
});
```

Slightly simpler than the answer included in the update (you don't need the wrapper function).

NodeJS + Express - Apply session middleware to some routes

Solution

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