Unity WebGL custom authentification won't work

Client Libraries
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1

Hi.
I’m experiencing an issue with my game made on Unity, specifically - the WebGL build.
I’ve tried everything by now, and got no idea how to troubleshoot.

So, the server side is in typescript, and the sdk is Unity. Android build works perfectly, connecting to a web socket without a hassle.
I do connect to the server through a domain name, rather than IP, and my server is behind reverse proxy (nginx) which routes https requests (443 port) to 7050. So generally, the game connects to https://mygame.com/v2/account/authenticate/custom?create=true& and nginx forwards it to http://172.17.0.1:7350/v2/account/authenticate/custom?create=true&

the code used from the documentation:

client = new Nakama.Client(Scheme, Host, Port, ServerKey, UnityWebRequestAdapter.Instance);

session = await client.AuthenticateCustomAsync(customId);

The documentation describes webgl support for sockets (grpc connection), but there’s nothing about authorization in the documentation. So, I suppose, It has to work from the box, right?

My issue is, that once the WebGL build loads up, it performs a preflight OPTIONS request to the server, receives 200 empty response, and nothing goes next.

Even though i set logging to debug - there’s nothing in nakama’s server log.

how my request looks in browser:

curl -I 'https://game.com/v2/account/authenticate/custom?create=true&' \
  -X 'OPTIONS' \
  -H 'accept: */*' \
  -H 'accept-language: en-US,en;q=0.9,ru;q=0.8' \
  -H 'access-control-request-headers: authorization,content-type' \
  -H 'access-control-request-method: POST' \
  -H 'sec-fetch-dest: empty' \
  -H 'sec-fetch-mode: cors' \
  -H 'sec-fetch-site: same-site'

here’s nakama’s response

HTTP/2 200
date: Mon, 19 May 2025 09:40:26 GMT
content-length: 0
access-control-allow-headers: Authorization,Content-Type
access-control-allow-origin: *

Seems like it doesn’t even get to the server’s lines


// Enable CORS on all requests.

 CORSHeaders := handlers.AllowedHeaders([]string{"Authorization", "Content-Type", "User-Agent"})
 CORSOrigins := handlers.AllowedOrigins([]string{"*"})
 CORSMethods := handlers.AllowedMethods([]string{http.MethodGet, http.MethodHead, http.MethodPost, http.MethodPut, http.MethodDelete})

Could you advice any solution for making unity werbgl build able to authenticate? Thank you.

FIY the nakama settings are as defaults:

socket:
  server_key: defaultkey
  port: 7350
  address: ''
console:
  port: 7351
  address: ''

UPD:

I’ve just changed the code, so the socket connection runs before Authentification:

        try
        {
            client = new Nakama.Client(Scheme, Host, Port, ServerKey, UnityWebRequestAdapter.Instance);
        }
        catch (Exception e)
        {
            Debug.Log($"{e}");
        }

#if UNITY_WEBGL && !UNITY_EDITOR
        ISocketAdapter adapter = new JsWebSocketAdapter();
#else
        ISocketAdapter adapter = new WebSocketAdapter();
#endif

        try
        {
            socket = client.NewSocket(true, adapter);
        }
        catch (Exception e)
        {
            Debug.Log($"{e}");
        }

        Debug.Log($"customId : {customId}");
        try
        {
                client.Timeout = 10;
                session = await client.AuthenticateCustomAsync(customId);
        }
        catch (Exception e)
        {
                Debug.Log($"{e}");
        }

The Chrome’s console writes:

Socket(_baseUri=‘wss://mygame.com/’, _cid=0, IsConnected=False, IsConnecting=False)
customId : User-1

and the last network request from the page ended with

custom?create=true& 200 preflight Preflight 0 B 1.60 s

UPD2:

Tried the same on localhost (127.0.0.1 via http), the same result.
Can anyone point to how to perform authentification in Unity WebGL build, please?