Update app.py

app.py

@@ -1,6 +1,6 @@
 import streamlit as st
 import requests
-from urllib.parse import urlencode, quote_plus
+from urllib.parse import urlencode, quote_plus, urlparse
 
 def forward_parameters(target_url, extra_params):
     """
@@ -11,6 +11,11 @@ def forward_parameters(target_url, extra_params):
     :return: The response from the target URL.
     """
     try:
+        # Ensure the target URL has a valid scheme
+        parsed_url = urlparse(target_url)
+        if not parsed_url.scheme:
+            return "Invalid URL: No scheme supplied. URLs must start with http:// or https://"
+
         # Construct the full URL with extra parameters
         full_url = f"{target_url}?{urlencode(extra_params, quote_via=quote_plus)}"
         response = requests.get(full_url)  # Using GET request for simplicity
@@ -23,7 +28,7 @@ def forward_parameters(target_url, extra_params):
 st.title('HTTPS Streamlit Parameters Forwarder')
 
 # Correctly accessing the query parameters
-params = st.query_params  # This is the correct usage
+params = st.query_params  # Access query parameters
 target_url = params.get('param1', [None])[0]  # Extract the target URL
 
 if target_url:
@@ -35,10 +40,10 @@ if target_url:
 else:
     st.error("No target URL provided.")
     st.markdown("""
-        Please append `?param1=URL` to the query string in the address bar, 
-        replacing `URL` with your desired target URL. 
-        
+        Please append `?param1=URL` to the query string in the address bar,
+        replacing `URL` with your desired target URL.
+
         Example: `?param1=http://example.com&param2=value`
-        
+
         This will forward `param2=value` to `http://example.com`.
     """)