sta / sta/websocket-sharp

a WebBehaviour OnOpen called but OnClosed isn't

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Dominant language
C#
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Description

I've seen a cases where OnClose on a WebBehaviour hasn't been called. This is due to the session _id not yet having been assigned and therefore the close event isn't called. The issue I tracked down to to the WebSocket open function where a startReceiving call can process a frameclose packet, even before the OnOpen event is called.

startReceiving();
try {
OnOpen.Emit (this, EventArgs.Empty);

One fix for this could be to call startReceiving after the OnOpen event. Although I'm not sure if there are any negative consequences of this.

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Research direction

Start at the WebSocket open function around startReceiving() and OnOpen.Emit, and trace how a frameclose packet is handled before the session _id is assigned. Reproduce the early-close sequence and confirm that the resulting behavior calls both OnOpen and OnClosed in the appropriate order.

Written by the indexing model from the issue text.

Assessment

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

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