Express JS会话中的未定义错误

Question

i want save data in session params.

/* Modules */

/* App Settings */
// session settings
app.use(express.cookieParser());
app.use(express.session({secret: '1234567890QWERTY'}));

app.get('/', function(req,res){
if(req.session.param){
    console.log('OK!');
}else{
    console.log('not found session data');
}
});

app.listen(app.get('port'));

when i run this codes

TypeError: Cannot read property 'param' of undefined
at C:\Users\frknbasaran\campusca\app.js:25:16

Thanks in advance

Sessions won't work unless you have these 3 in this order:

app.use(express.cookieParser());
app.use(express.session({secret: '1234567890QWERTY'}));
app.use(app.router);

Answer 1

You need to set it first... I did not see this in your code, something like:

req.session.param = "Hello World";

Unless param refers to the property that comes with the request object that only url variables.

Answer 2

You can't set req.session.params, since its req.session which is none. What about cookieSession. That should give you req.session http://expressjs.com/3x/api.html#cookieSession

Answer 3

Sessions won't work unless you have these 3 in this order:

app.use(express.cookieParser());
app.use(express.session({secret: '1234567890QWERTY'}));
app.use(app.router);