Microsoft.AspNetCore.SignalR.Hubs.AuthorizeModule.BuildAuthorizeConnect C# (CSharp) Method

        public override Func<HubDescriptor, HttpRequest, bool> BuildAuthorizeConnect(Func<HubDescriptor, HttpRequest, bool> authorizeConnect)
        {
            return base.BuildAuthorizeConnect((hubDescriptor, request) =>
            {
                // Execute custom modules first and short circuit if any deny authorization.
                if (!authorizeConnect(hubDescriptor, request))
                {
                    return false;
                }

                // Execute the global hub connection authorizer if there is one next and short circuit if it denies authorization.
                if (_globalConnectionAuthorizer != null && !_globalConnectionAuthorizer.AuthorizeHubConnection(hubDescriptor, request))
                {
                    return false;
                }

                // Get hub attributes implementing IAuthorizeHubConnection from the cache
                // If the attributes do not exist in the cache, retrieve them using reflection and add them to the cache
                var attributeAuthorizers = _connectionAuthorizersCache.GetOrAdd(hubDescriptor.HubType,
                    hubType => hubType.GetTypeInfo().GetCustomAttributes().OfType<IAuthorizeHubConnection>());

                // Every attribute (if any) implementing IAuthorizeHubConnection attached to the relevant hub MUST allow the connection
                return attributeAuthorizers.All(a => a.AuthorizeHubConnection(hubDescriptor, request));
            });
        }