I received error

[Sargis]

func onError( client: CentrifugeClient, event: CentrifugeErrorEvent){

}

about onError function, I get following error

▿ CentrifugeError ▿ transportError : 1 element ▿ error : WSError

• type : SwiftCentrifuge.ErrorType.protocolError
• message : "{\"reason\":\"bad request\",\"reconnect\":false}"
• code : 3003

Please help me try to understand error: Thanks

[FZambia]

Hello, do you know when it happens? On connect? In general, the simplest way is to look at server logs and logs should contain entry on INFO level about the reason of client's bad request.

Most often you can get error like this during connect if you have invalid token, or connecting without token and without connect proxy configured on server side.

[Sargis]

Thanks for response I get following logs from backend side

{"level":"info","client":"ce6b4c25-7694-4b1a-8fe5-5f2266ebc15d","data":"n\b\u0015\"j\naeyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIyNiJ9.qDnjxWXiYhViUWCG3yLVFFSaEreKicVSjCGU-QVa2M0\"\u0005swift","error":"invalid character '\b' in literal null (expecting 'u')","user":"","time":"2022-11-24T12:16:17Z","message":"error decoding command"} {"level":"debug","client":"ce6b4c25-7694-4b1a-8fe5-5f2266ebc15d","reason":"bad request","reconnect":false,"user":"","time":"2022-11-24T12:16:17Z","message":"closing client connection"}

[FZambia]

Probably you have a proxy between app and Centrifugo which does not allow Sec-WebSocket-Protocol header to pass so Centrifugo does not receive subprotocol and thinks it's a client connecting over JSON protocol. To test this idea you may try to add ?cf_protocol=protobuf to WebSocket URL.

If it does not help you can provide detailed steps to reproduce + exact client and server versions so I could look at this myself, otherwise I can only guess what's going on.

[Sargis]

Hello We have updated server version, and everything is work perfectly

Thank you very much Alexander

[FZambia]

Ah, cool :) Welcome!