Streamlit Apache Reverse Proxy

Posted under » Apache » Python Data Analysis on 20 Jan 2022

After I had success in setting up Apache Reverse Proxy Mod for Jupyter Notebook. I thought I could do the same for Streamlit.

The first step is to create a virtual environment.

$ pip install streamlit

It will take a while and once done you can run streamlit. Test it.

$ streamlit hello

You will see that it runs on port 8501. You might want to change the port to make things more predictable. Try 8080

$ streamlit hello --server.port 8080

However, you do not have to put this parameter if you have modified the config.

As with Jupyter notebook, you need to enable the same exact Apache mods

• proxy
• proxy_http
• proxy_wstunnel
• headers

The Apache config is similiar to Jupyter Notebook.

<VirtualHost *:80>
ServerName streamlit.com
ServerAdmin webmaster@localhost

ErrorLog ${APACHE_LOG_DIR}/error-streamlit.log
CustomLog ${APACHE_LOG_DIR}/access-streamlit.log combined

ProxyPreserveHost On
ProxyRequests Off

<Proxy *>
   Order deny,allow
   Allow from all
</Proxy>

   ProxyPass / "http://localhost:8080/
   ProxyPassReverse / "http://localhost:8080/

   <Location "/stream">
      ProxyPass ws://localhost:8080/stream
      ProxyPassReverse ws://localhost:8080/stream
   </Location>
</VirtualHost>

The thing to note that the websocket directory for streamlit is 'stream'.

If the streamlit hello app works fine, it means the proxy is working. So let us create a simple app.

Go and create a directory eg. /test and go to /test. vim pakistan.py

import pandas as pd
import streamlit as st

st.title("Welcome to Pakistan")
st.write("Our first Streamlit App")

st.write(
  pd.DataFrame({
   'A': [1, 2, 3, 4],
   'B': [5, 6, 7, 8]
	})
      )

To run pakistan.py

$ streamlit run pakistan.py --server.port 8080

If you use your browser to http://streamlit.com (eg) and you see your app running, then you haz success.

This may not do it if security is a concern. So let put password to access the page.