flask session not reloading

Question

Right now I am using Flask and a flask 3rd party library Flask-Session

Using the code below, I reload the page 4 times and get the following output:

set userid[0] 127.0.0.1 - - [27/Sep/2014 22:28:35] "GET / HTTP/1.1" 200 - set userid[1] 127.0.0.1 - - [27/Sep/2014 22:28:37] "GET / HTTP/1.1" 200 - set userid[2] 127.0.0.1 - - [27/Sep/2014 22:28:37] "GET / HTTP/1.1" 200 - set userid[3] 127.0.0.1 - - [27/Sep/2014 22:28:38] "GET / HTTP/1.1" 200 -

Code:

from flask import Flask, session from flask.ext.session import Session app = Flask(__name__) sess = Session() nextId = 0 def verifySessionId(): global nextId if not 'userId' in session: session['userId'] = nextId nextId += 1 sessionId = session['userId'] print ("set userid[" + str(session['userId']) + "]") else: print ("using already set userid[" + str(session['userId']) + "]") sessionId = session.get('userId', None) return sessionId @app.route("/") def hello(): userId = verifySessionId() return str(userId) if __name__ == "__main__": app.config['SECRET_KEY'] = 'super secret key' app.config['SESSION_TYPE'] = 'filesystem' sess.init_app(app) app.debug = True app.run()

Shouldn't session['userId] be 'saved out' each time I reload the page?

Are cookies enabled? A session id is saved in a cookie, tied to the filesystem storage. — Martijn Pieters
– Martijn Pieters, Commented Sep 28, 2014 at 2:53
@MartijnPieters Yeah... that was the issue. It's been a long few days with this, thanks for your help. — MintyAnt
– MintyAnt, Commented Sep 28, 2014 at 2:55

Martijn Pieters · Accepted Answer · 2014-09-28 02:56:24Z

You need to have cookies enabled for sessions to work. Even Flask-Session cannot track a browser without those.

Flask-Session sets a cookie with a unique id, then later on finds your session data again by that cookie.

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