Timeout a streamlit webapp after certain time

Using Streamlit
1

Summary

How do I make my streamlit webapp timeout after certain time of inactivity by user on Windows & Unix systems.

Expected behavior:

User opens the webapp, leaves the tab running with no activity for some time. Streamlit script should close (st.stop() maybe) after a certain amount of time.

Debug info

  • Streamlit version: 1.27.0
  • Python version: 3.7.6
  • Using Conda? PipEnv? PyEnv? Pex?
  • OS version: Windows 10
  • Browser version: Chrome 83.0.4103.116

Additional information

Since I couldnt find anything inbuilt related to this, i tried to find if i can timeout a function instead.
I found this stackoverflow thread which i thought could be useful.
Here, i found the 3rd highest answer by user “Russia Must Remove Putin”

His solution involved using a @exit_after decorator to timeout a function.

While this solution did work somewhat it isnt what i intended to do. When i used this decorater, instead of timing out that particular function which it wrapped around & stopping its execution. It stopped the whole Streamlit app running in my terminal.

I had to run the command “streamlit run my_file.py” to get it back up.

What i need is for the streamlit script to run the st.stop() command after certain minutes of inactivity by user.

2

How would that be useful? Do you want to interrupt an infinite loop or a long running task?

3

So, I am making this script to serve as an Webapp for doing server related tasks like status checks, etc. I have made functions for each of my tasks & they work as intended.

After i have done my tasks( number of tasks & its order are not predefined), i click “Logout” button on my UI to stop the script & send me an summary of whatever i have done in this session( i achieve this my storing a string in session state). The summary is sent via mail from python. This thing works as expected on logout button click.

Now i want to add timeout functionality to this for a case where I (user) forgets to logout (stop it).

I want to add my timeout functionality to basically stop the session/ browser tab after some time of inactivity & send me the summary after stopping the session.

4

@Sanchit_Rabadey have u considered:

  1. Checking user timout logic in a separate thread: if the user times out: pushing True to queue.Queue()
  2. Define a parent decorator function (lets call it- “check_user_timeout”): that checks if queue is empty or not : and if its non-empty: then calls st.stop()
  3. wrapping ur logics inside @check_user_timeout
5

Thanks for the reply.
During our own discussion, we thought the same as you just told, about running streamlit on another thread & monitoring it from other one.

But we were not able to do it successfully due to my less experience in python.

I think your solution might work but i wont be able to test this as we have abandoned the user time out feature & mandated all users to logout manually without fail. We were time bound with this webapp & hence had to fallback on this.
Thanks again.

6

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