MessageDrivenSubscriptionsConfigExtensions.SubscriptionAuthorizer lambda exposes IIncomingPhysicalMessageContext

[johnsimons]

The problem with this is that a user has access to a lot of things that I don't think make sense, eg:

endpointConfiguration.UseTransport<MsmqTransport>()
                .SubscriptionAuthorizer(context =>
                {
                    context.UpdateMessage(new byte[0]);
                    return true;
                });

[andreasohlund]

Since the subscriptions are control messages should we only give them a readonly dictionary?

[danielmarbach]

We should probably only pass in IncomingMessage. The Incoming Message doesn't allow to update the body.