flask session overwrites another session [duplicate]

Question

I have stored the userid into a flask session. But when another user opens the browser and sets the session userid. My current session userid changes. Is it possible. I am also using a global class variable which gets initiated from the session as below. Because of this all process gets messed up when more than one user uses the url. I am running python flask using nohup

login @app.route('/mainlogin',methods = ['GET','POST']) def login(): try: if request.method =='POST': session['uid'] = request.form['db_user'] main @app.route('/main',methods = ['GET','POST']) def mainindex(): global clsmain uid=session.get('uid') clsmain=clsmain(uid) @app.route('/viewlog',methods = ['GET','POST']) def viewlog(): return render_template('log.html',status="<br>" + clsmain.readlog())

Why does session overwrites. Or is it global variable acting as the same value across sessions?

Without knowing what clsmain is I can't say, but something about it smells fishy to me. — sberry
– sberry, Commented Oct 9, 2017 at 16:21
@sberry clsmain is a class with common variables and functions. — kten
– kten, Commented Oct 9, 2017 at 16:28
@BrenBarn global variable is used to access clsmain object in another page — kten
– kten, Commented Oct 9, 2017 at 16:29
Don't use a global variable for that. Use a session variable or some such thing. — BrenBarn
– BrenBarn, Commented Oct 9, 2017 at 16:32

kten · Accepted Answer · 2017-10-10 09:08:35Z

The problem is not with flask session but the global variable. Global variable holds same value across sessions(or flask does not handle global variables based on sessions) . Found reference from this link https://stackoverflow.com/questions/25273989/flask-global-variables-and-sessions

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