Added STUN connection test code

utils/turn.py

@@ -1,28 +1,44 @@
-import logging 
+import logging
 import os
-
 import streamlit as st
 from twilio.base.exceptions import TwilioRestException
 from twilio.rest import Client
+import requests
 
 logger = logging.getLogger(__name__)
 
+def check_connectivity():
+    try:
+        response = requests.get("https://api.twilio.com")
+        if response.status_code == 200:
+            logger.info("Twilio API is reachable.")
+        else:
+            logger.warning(f"Twilio API returned status code {response.status_code}")
+    except requests.RequestException as e:
+        logger.error(f"Failed to reach Twilio API: {e}")
+
+    try:
+        response = requests.get("https://stun.l.google.com:19302")
+        if response.status_code == 200:
+            logger.info("Google STUN server is reachable.")
+        else:
+            logger.warning(f"Google STUN server returned status code {response.status_code}")
+    except requests.RequestException as e:
+        logger.error(f"Failed to reach Google STUN server: {e}")
 
 def get_ice_servers():
     """Use Twilio's TURN server because Streamlit Community Cloud has changed
-    its infrastructure and WebRTC connection cannot be established without TURN server now.  # noqa: E501
-    We considered Open Relay Project (https://www.metered.ca/tools/openrelay/) too,
-    but it is not stable and hardly works as some people reported like https://github.com/aiortc/aiortc/issues/832#issuecomment-1482420656  # noqa: E501
-    See https://github.com/whitphx/streamlit-webrtc/issues/1213
+    its infrastructure and WebRTC connection cannot be established without TURN server now.
     """
+    check_connectivity()
 
-    # Ref: https://www.twilio.com/docs/stun-turn/api
     try:
         account_sid = os.environ["TWILIO_ACCOUNT_SID"]
         auth_token = os.environ["TWILIO_AUTH_TOKEN"]
+        logger.info(f"Twilio SID: {account_sid}, Auth Token: {auth_token[:4]}...")  # Log partial token for security
     except KeyError:
         logger.warning(
-            "Twilio credentials are not set. Fallback to a free STUN server from Google."  # noqa: E501
+            "Twilio credentials are not set. Fallback to a free STUN server from Google."
         )
         return [{"urls": ["stun:stun.l.google.com:19302"]}]
 
@@ -31,8 +47,9 @@ def get_ice_servers():
     try:
         token = client.tokens.create()
     except TwilioRestException as e:
+        logger.error(f"Twilio API error: {e}")
         st.warning(
-            f"Error occurred while accessing Twilio API. Fallback to a free STUN server from Google. ({e})"  # noqa: E501
+            f"Error occurred while accessing Twilio API. Fallback to a free STUN server from Google. ({e})"
         )
         return [{"urls": ["stun:stun.l.google.com:19302"]}]