app.py

import streamlit as st
from streamlit.components.v1 import html

# Function to extract query parameters
def get_query_params():
    # Use st.query_params to access query parameters
    return st.query_params()

# Main function where we handle the redirect
def main():
    # Get query parameters
    query_params = get_query_params()
    
    # Check if 'param1' exists in the query parameters
    if 'param1' in query_params:
        # Extract the first value of 'param1'
        redirect_url = query_params['param1'][0]
        
        # Use JavaScript to redirect to the URL provided in 'param1'
        js = f"""
        <script>
        window.location.href = "{redirect_url}";
        </script>
        """
        html(js)  # Use Streamlit's HTML component to run the JavaScript
    else:
        # If 'param1' is not present, display a message
        st.write("No redirect URL provided in query parameters.")

if __name__ == "__main__":
    main()