Authentication and Authorization for SignalR Persistent Connections

by Patrick Fletcher, Tom FitzMacken


This documentation isn't for the latest version of SignalR. Take a look at ASP.NET Core SignalR.

This topic describes how to enforce authorization on a persistent connection. For general information about integrating security into a SignalR application, see Introduction to Security.

Software versions used in this topic

Previous versions of this topic

For information about earlier versions of SignalR, see SignalR Older Versions.

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Enforce authorization

To enforce authorization rules when using a PersistentConnection you must override the AuthorizeRequest method. You cannot use the Authorize attribute with persistent connections. The AuthorizeRequest method is called by the SignalR Framework before every request to verify that the user is authorized to perform the requested action. The AuthorizeRequest method is not called from the client; instead, you authenticate the user through your application's standard authentication mechanism.

The example below shows how to limit requests to authenticated users.

public class AuthenticatedConnection : PersistentConnection 
    protected override bool AuthorizeRequest(IRequest request) 
        return request.User.Identity.IsAuthenticated; 

You can add any customized authorization logic in the AuthorizeRequest method; such as, checking whether a user belongs to a particular role.