WebSocket connection issue

[Vinayak006]

Description:
We are encountering an error while trying to establish a WebSocket connection. The web team has successfully connected to the WebSocket using the JavaScript SIP package (JS SIP), but the mobile application is facing difficulties. We are using the testing credentials given in SIP JS.

Context:

• The web team uses the JS SIP package, which is a JavaScript version of SIP_UA.
• We are using a SIP JS test accounts for proof of concepts (POCs).
• The error occurs specifically on the mobile platform.

Expected Behavior:

• The mobile application should be able to connect to the WebSocket and use the SIP functionality similar to the web application.

Additional Information:

• We suspect there may be compatibility issues or configuration differences between the web and mobile platforms.
• Any insights or suggestions for resolving this issue would be greatly appreciated.

React code: (using JS SJIP)

const socket = new WebSocketInterface("wss://edge.sip.onsip.com");
  socket.via_transport = "WSS";
  const userName = localStorage.getItem("user_name") || "";
  const password = localStorage.getItem("password") || "";
  const configuration = {
    sockets: [socket],
    uri: `sip:${userName}@sipjs.onsip.com`,
    authorization_user: userName,
    password: password,
    display_name: userName,
 };
 const ua = new UA(configuration);
 ua.start();

Flutter code: (using SIP UA)

await SIPUAHelper().start(
  UaSettings()
    ..webSocketUrl = "wss://edge.sip.onsip.com"
    ..webSocketSettings.transport_scheme = "WSS"
    ..displayName = "8000"
    ..password = "123"
    ..authorizationUser = "8000"
    ..uri = "sip:8000@sipjs.onsip.com",
);

If sip_ua is dart version of js sip, websocket should have connected successfully but we are getting error given below:

flutter: [2024-05-02 16:43:39.316] Level.debug websocket_interface.dart:13 ::: new() [url:wss://edge.sip.onsip.com]
flutter: [2024-05-02 16:43:39.375] Level.debug websocket_interface.dart:30 ::: SIP URI: sip:edge.sip.onsip.com;transport=wss
flutter: [2024-05-02 16:43:39.387] Level.debug ua.dart:89 ::: new() [configuration:Instance of 'Settings']
flutter: [2024-05-02 16:43:39.400] Level.info config.dart:259 ::: Check mandatory parameter => sockets.
flutter: [2024-05-02 16:43:39.403] Level.info config.dart:259 ::: Check mandatory parameter => uri.
flutter: [2024-05-02 16:43:39.437] Level.debug config.dart:266 ::: Check optional parameter => authorization_user.
flutter: [2024-05-02 16:43:39.444] Level.debug config.dart:266 ::: Check optional parameter => user_agent.
flutter: [2024-05-02 16:43:39.446] Level.debug config.dart:266 ::: Check optional parameter => connection_recovery_max_interval.
flutter: [2024-05-02 16:43:39.447] Level.debug config.dart:266 ::: Check optional parameter => connection_recovery_min_interval.
flutter: [2024-05-02 16:43:39.448] Level.debug config.dart:266 ::: Check optional parameter => contact_uri.
flutter: [2024-05-02 16:43:39.450] Level.debug config.dart:266 ::: Check optional parameter => display_name.
flutter: [2024-05-02 16:43:39.451] Level.debug config.dart:266 ::: Check optional parameter => instance_id.
flutter: [2024-05-02 16:43:39.452] Level.debug config.dart:266 ::: Check optional parameter => no_answer_timeout.
flutter: [2024-05-02 16:43:39.454] Level.debug config.dart:266 ::: Check optional parameter => session_timers.
flutter: [2024-05-02 16:43:39.456] Level.debug config.dart:266 ::: Check optional parameter => session_timers_refresh_method.
flutter: [2024-05-02 16:43:39.457] Level.debug config.dart:266 ::: Check optional parameter => password.
flutter: [2024-05-02 16:43:39.459] Level.debug config.dart:266 ::: Check optional parameter => realm.
flutter: [2024-05-02 16:43:39.461] Level.debug config.dart:266 ::: Check optional parameter => ha1.
flutter: [2024-05-02 16:43:39.463] Level.debug config.dart:266 ::: Check optional parameter => register.
flutter: [2024-05-02 16:43:39.464] Level.debug config.dart:266 ::: Check optional parameter => register_expires.
flutter: [2024-05-02 16:43:39.466] Level.debug config.dart:266 ::: Check optional parameter => registrar_server.
flutter: [2024-05-02 16:43:39.468] Level.debug config.dart:266 ::: Check optional parameter => register_extra_contact_uri_params.
flutter: [2024-05-02 16:43:39.469] Level.debug config.dart:266 ::: Check optional parameter => use_preloaded_route.
flutter: [2024-05-02 16:43:39.470] Level.debug config.dart:266 ::: Check optional parameter => dtmf_mode.
flutter: [2024-05-02 16:43:39.471] Level.debug config.dart:266 ::: Check optional parameter => ice_gathering_timeout.
flutter: [2024-05-02 16:43:39.478] Level.debug transport.dart:42 ::: new()
flutter: [2024-05-02 16:43:39.511] Level.debug ua.dart:151 ::: start()
flutter: [2024-05-02 16:43:39.513] Level.debug transport.dart:89 ::: connect()
flutter: [2024-05-02 16:43:39.515] Level.debug ua.dart:906 ::: Transport connecting
flutter: [2024-05-02 16:43:39.519] Level.debug sip_ua_helper.dart:146 ::: connecting => Instance of 'EventSocketConnecting'
flutter: [2024-05-02 16:43:39.525] Level.debug websocket_interface.dart:71 ::: connect()
flutter: [2024-05-02 16:43:39.526] Level.debug websocket_interface.dart:87 ::: connecting to WebSocket wss://edge.sip.onsip.com
flutter: [2024-05-02 16:43:39.530] Level.info websocket_dart_impl.dart:26 ::: connect wss://edge.sip.onsip.com, {}, [sip]
flutter: [2024-05-02 16:43:40.920] Level.debug websocket_interface.dart:103 ::: Closed [500, WebSocketException: Connection to 'https://edge.sip.onsip.com:0#' was not upgraded to websocket]!
flutter: [2024-05-02 16:43:40.921] Level.debug websocket_interface.dart:167 ::: WebSocket wss://edge.sip.onsip.com closed
flutter: [2024-05-02 16:43:40.923] Level.debug sip_ua_helper.dart:158 ::: disconnected => Code: [500], Cause: error, Reason: WebSocketException: Connection to 'https://edge.sip.onsip.com:0#' was not upgraded to websocket
flutter: [2024-05-02 16:43:40.926] Level.debug transport.dart:183 ::: reconnection attempt: 1. next connection attempt in 2 seconds
flutter: [2024-05-02 16:43:42.927] Level.debug transport.dart:89 ::: connect()
flutter: [2024-05-02 16:43:42.928] Level.debug ua.dart:906 ::: Transport connecting
flutter: [2024-05-02 16:43:42.929] Level.debug sip_ua_helper.dart:146 ::: connecting => Instance of 'EventSocketConnecting'
flutter: [2024-05-02 16:43:42.930] Level.debug websocket_interface.dart:71 ::: connect()
flutter: [2024-05-02 16:43:42.931] Level.debug websocket_interface.dart:120 ::: disconnect()
flutter: [2024-05-02 16:43:42.931] Level.debug websocket_interface.dart:167 ::: WebSocket wss://edge.sip.onsip.com closed
flutter: [2024-05-02 16:43:42.932] Level.debug sip_ua_helper.dart:158 ::: disconnected => Code: [0], Cause: error, Reason: Client send disconnect
flutter: [2024-05-02 16:43:42.933] Level.debug transport.dart:183 ::: reconnection attempt: 2. next connection attempt in 3 seconds
flutter: [2024-05-02 16:43:42.935] Level.error websocket_interface.dart:131 ::: close() | error closing the WebSocket: Null check operator used on a null value
flutter: [2024-05-02 16:43:42.935] Level.debug websocket_interface.dart:87 ::: connecting to WebSocket wss://edge.sip.onsip.com
flutter: [2024-05-02 16:43:42.936] Level.info websocket_dart_impl.dart:26 ::: connect wss://edge.sip.onsip.com, {}, [sip]
flutter: [2024-05-02 16:43:44.137] Level.debug websocket_interface.dart:103 ::: Closed [500, WebSocketException: Connection to 'https://edge.sip.onsip.com:0#' was not upgraded to websocket]!
flutter: [2024-05-02 16:43:44.138] Level.debug websocket_interface.dart:167 ::: WebSocket wss://edge.sip.onsip.com closed
flutter: [2024-05-02 16:43:44.138] Level.debug sip_ua_helper.dart:158 ::: disconnected => Code: [500], Cause: error, Reason: WebSocketException: Connection to 'https://edge.sip.onsip.com:0#' was not upgraded to websocket

[opendeeple]

I am getting this issue?