No way to detect half-closed websockets about ws HOT 4 CLOSED

No, there isn't. You can use the 'conclude' event of the Receiver but that is an internal only event. It is emitted when a peer receives a close frame.

websocket._receiver.on('conclude', handler);

You shouldn't close the connection when this event is emitted because the closing handshake is not yet complete. The connection should be closed only after the close frame has been sent and received.

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Thank you for your reply.

Would it be correct to use the 'conclude' event to set a timer and if, say, 10 seconds later the connection is still not closed, terminate() it?

from ws.

The library forcibly closes the connection if it is not closed properly 30 seconds after calling websocket.close() (which is called when the 'conclude' event is emitted). See also https://github.com/websockets/ws?tab=readme-ov-file#how-to-detect-and-close-broken-connections.

from ws.

I'm closing this as answered.

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