A minor update to @marduk code at Right way to manage same user opening multiple sessions - #3 by marduk
The goal is to limit the number of times a user can concurrently connect to a Streamlit app.
Replacing the deprecated @st.experimental_singleton with @st.cache_resource() st.cache_resource - Streamlit Docs
import streamlit as st
import datetime as dt
# Example list of users
USER_LIST = ['Barbara','Christopher']
# Updates the active session for a given user
#@st.experimental_singleton
#def get_active_session(username):
# return st.session_state.session_id
@st.cache_resource()
def get_active_session(username):
return st.session_state.session_id
# App when logged out
if 'session_id' not in st.session_state:
st.warning('You are currently logged out')
#Login form
with st.form('Login form'):
username = st.text_input('Username (try "Barbara" or "Christopher")')
sign_in = st.form_submit_button('Sign In')
if sign_in and username in USER_LIST:
st.session_state.user_id = username
st.session_state.session_id = username + '_' + str(dt.datetime.now())
get_active_session.clear()
aux_active_session = get_active_session(st.session_state.user_id)
st.experimental_rerun()
# App when logged in and session active
elif st.session_state.session_id == get_active_session(st.session_state.user_id):
st.success('You are currently logged in')
st.write('Session ID: ',st.session_state.session_id)
st.button('Useless button')
# Logout button
if st.button('Logout'):
for key in st.session_state.keys():
del st.session_state[key]
st.experimental_rerun()
# App when session expired
else:
st.info('Your session has expired')
for key in st.session_state.keys():
del st.session_state[key]
st.button('Return to homepage')