SignalR doesn't use Session on server

c# asp.net signalr session-state signalr-hub
Danillo Corvalan picture Danillo Corvalan · Oct 21, 2011 · Viewed 16.5k times · Source

When I try to access the HttpContext current session from the HUB it returns null.

I tried making use of the interface IRequiresSession but it didn't work. Can someone help me?

Answer

Damian Edwards picture Damian Edwards · Oct 21, 2011

SignalR connections (including the connection underlying all Hub operations for a client) do not support Session state. You could enable it if you wanted to but we'd strongly recommend against it as session state access serializes requests for a given client, meaning you won't really get the benefit from SignalR duplex messaging anymore, as one request will block the other e.g. in the long polling transport, the receiving connection will block any attempt to send.

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