turn.py

import logging
import os

import streamlit as st
from twilio.rest import Client

logger = logging.getLogger(__name__)


@st.cache_data
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
    """

    # Ref: https://www.twilio.com/docs/stun-turn/api
    try:
        account_sid = 'ACeb93920d6542f3f7b620d0d4987574e0'
        auth_token = '76dc449baa67fa713154639fc7c4e0c2'
    except KeyError:
        logger.warning(
            "Twilio credentials are not set. Fallback to a free STUN server from Google."  # noqa: E501
        )
        return [{"urls": ["stun:stun.l.google.com:19302"]}]

    client = Client(account_sid, auth_token)

    token = client.tokens.create()

    return token.ice_servers