socket.io-client-csharp
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Does autoupgrade break the EngineIO protocol?
I find the newly added feature autograde send a upgrade message directly, but from the protocol of Engine.IO https://socket.io/docs/v4/engine-io-protocol/#upgrade clients MUST send a ping packet with the string probe in the payload. I'm not sure whether this implementation break the protocol and may be not work in all the server implementation?
already implemented, which server are you using?