node.js session values aren't accessible in second api call - node.js

Question

i am facing the following issue:
(I am using node-client-sessions module)
I send an ajax request, through the browser, to my API : /api/request1
In my api.js I handle that request, calculate some stuff and write some results into the session like this.
router.post('/request1', function(req, response, next) {
// some wield calculations
req.session.calcData = { // some content }; 
// some other calculations
console.log(req.session.calcData); // logs the correct object
response.send('success');
}
After receiving the success on client side I send another api call like this for example: /api/request2
router.post('/request2', function(req, response, next) {
// here i want to use some of the results from the previous calculations which i stored in the calcData session.
console.log(req.session.calcData); // this logs undefined
}
Shouldn't req.session.calcData be available in both functions?
Enviroment Info
Express Framework 4.x
app.js :
...
var app = express();
...
var session = require('client-sessions');
...
app.use(session({
cookieName: 'session',
secret: 'random_string_goes_here',
duration: 30 * 60 * 9999999,
activeDuration: 5 * 60 * 1000,
}));
...
app.use('/api', api);

Answer 1

According to example at client-session, you must use req.csession and req.csflush();
var express = require('express');
var path = require('path')
var cs = require('client-session');
var clientSession = cs('mysecretkey');
var app = express();
app.use(clientSession.connect());
app.get('/', function(req, res){
var count = req.csession['count'];
if(!count) count = 1;
else count++;
req.csession['count'] = count;
//sync to cookie session equal to res.csflush(),make sure to call it before response
req.csflush();
res.send(count.toString());
});
app.listen(8124);
console.log('Server running at http://127.0.0.1:8124/');