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When OnDisconnect is invoked, there is no Exception passed through.

See original GitHub issue

Describe the bug

When that OnDisconnect method is called, it appears as though there is no Exception passed through, so there’s no way to differentiate between a user that has just closed their browser, or a user that has been experiencing connectivity issues. SignalR for .NET Framework would pass through a boolean informing the server that it was as a result of a timeout.

To Reproduce

Exceptions (if any)

Further technical details

Your Azure SignalR SDK version
Your Server ASPNETCORE version or Assembly version of Microsoft.AspNetCore.SignalR
Your SignalR Client SDK version

Issue Analytics

State:
Created 2 years ago
Reactions:1
Comments:5 (2 by maintainers)

Top GitHub Comments

1reaction

vicancycommented, May 13, 2022

Sorry for the late response.

differentiate client disconnection due to closing their browser vs a client losing their internet connection

When client “loses internet connection”, SignalR hub leverages the SignalR client ping messages to determine if the client is still there, however SignalR swallows the OperationCancelledException https://github.com/dotnet/aspnetcore/blob/88ee825bca9978df7f1d8c8c09b71b6dffeeb53b/src/SignalR/server/Core/src/HubConnectionHandler.cs#L169 and as a result it fails to differentiate from these 2 conditions and here is the issue https://github.com/dotnet/aspnetcore/issues/26701

In such a scenario, the Azure SignalR acts as a proxy and there is little Azure SignalR can do to change the behavior in SignalR application layer.

1reaction

terencefancommented, Sep 6, 2021

I’ll see if SignalR protocol could support this.

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