I am trying to figure out a way to catch failing connections to the WebSocket stream endpoint of directline (for example wss://europe.directline.botframework.com/v3/directline/conversations/...) to be able to fall back to the polling mechanism.
Use case example: In some corporate networks WebSocket stream connections are blocked by a proxy etc or some plugins block WebSocket streams. If that is the case (resulting in the console error by direcline.js that the connection could not be established) I want to fall back to the polling so the affected users are still able to use the bot.
I already have the functioning fallback if the directline connectionStatus is 4 / FailedToConnect resulting in the DIRECT_LINE/CONNECT_REJECTED action in the store. But if the connection via wss fails the directline connectionStatus is still 2 / Online resulting in the DIRECT_LINE/CONNECT_FULFILLED store action, which makes sense since it got a conversationId and token. So I am searching for a way to detect and then handle the failed wss connection.
Also the directline object (that also holds the connectionStatus) does not change when the error is thrown and connectionStatus.hasError stays false and the connectionStatus.thrownError stays null.
Do you have experiences, insights, or ideas on how I could be able to achieve the detection of the failed wss connection?