Cannot reconnect a WebSocket in WebGL

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
45/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
csharp, unity
Domain
game-dev, networking

Research direction

Start with the Connect and Close entry points and the Update() call sequence described in the issue, then inspect the WebGL-specific WebSocket lifecycle. Reproduce opening, sending, closing, and reopening in a Unity WebGL build; done means the second Connect succeeds without the already-connected or connecting-state exception.

Written by the indexing model from the issue text.

Description

The sequence...

  • Opening a socket: Invoke() on a method calling await _webSock.Connect();
  • Sending messages: Calling _webSock.SendText(msg);
  • Closing the socket: Invoke() on a method calling await _webSock.Close();

Everything works fine.
All the calls are performed inside the Update() method.
The three calls are user-controlled. Hence, some seconds pass between them.

Now, trying to re-open the socket again with: Invoke() on a method calling await _webSock.Connect();
Work good in Unity Editor.
Fails in WebGL with error:

WebSocketInvalidStateException: WebSocket is already connected or in connecting state.
  at NativeWebSocket.WebSocket.Connect () [0x00000] in <00000000000000000000000000000000>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <00000000000000000000000000000000>:0 
 
(Filename: currently not available on il2cpp Line: -1)
Dominant language
C#
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  4. Open a pull request that references the issue number.

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