protected override bool OnBeforeAuthorizeConnect(HubDescriptor hubDescriptor, Microsoft.AspNet.SignalR.IRequest request)
 {
     _logger.Log("OnBeforeAuthorizeConnect " +
         "RemoteIpAddress:\"" + request.Environment["server.RemoteIpAddress"] + "\" " +
         "User-Agent: \"" + request.Headers["User-Agent"] + "\"");
     return base.OnBeforeAuthorizeConnect(hubDescriptor, request);
 }

 public bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
 {
     VerifyArgument.IsNotNull("hubDescriptor", hubDescriptor);
     VerifyArgument.IsNotNull("request", request);
     var result = request.User.IsAuthenticated() && Service.IsAuthorized(hubDescriptor.GetAuthorizationRequest(request));
     return result;
 }

        /// <summary>
        /// Searches the specified <paramref name="hub">Hub</paramref> for the specified <paramref name="method"/>.
        /// </summary>
        /// <remarks>
        /// In the case that there are multiple overloads of the specified <paramref name="method"/>, the <paramref name="parameters">parameter set</paramref> helps determine exactly which instance of the overload should be resolved. 
        /// If there are multiple overloads found with the same number of matching parameters, none of the methods will be returned because it is not possible to determine which overload of the method was intended to be resolved.
        /// </remarks>
        /// <param name="hub">Hub to search for the specified <paramref name="method"/> on.</param>
        /// <param name="method">The method name to search for.</param>
        /// <param name="descriptor">If successful, the <see cref="MethodDescriptor"/> that was resolved.</param>
        /// <param name="parameters">The set of parameters that will be used to help locate a specific overload of the specified <paramref name="method"/>.</param>
        /// <returns>True if the method matching the name/parameter set is found on the hub, otherwise false.</returns>
        public bool TryGetMethod(HubDescriptor hub, string method, out MethodDescriptor descriptor, IList<IJsonValue> parameters)
        {
            string hubMethodKey = BuildHubExecutableMethodCacheKey(hub, method, parameters);

            if (!_executableMethods.TryGetValue(hubMethodKey, out descriptor))
            {
                IEnumerable<MethodDescriptor> overloads;

                if (FetchMethodsFor(hub).TryGetValue(method, out overloads))
                {
                    var matches = overloads.Where(o => o.Matches(parameters)).ToList();

                    // If only one match is found, that is the "executable" version, otherwise none of the methods can be returned because we don't know which one was actually being targeted
                    descriptor = matches.Count == 1 ? matches[0] : null;
                }
                else
                {
                    descriptor = null;
                }

                // If an executable method was found, cache it for future lookups (NOTE: we don't cache null instances because it could be a surface area for DoS attack by supplying random method names to flood the cache)
                if (descriptor != null)
                {
                    _executableMethods.TryAdd(hubMethodKey, descriptor);
                }
            }

            return descriptor != null;
        }

        public bool TryGetMethod(HubDescriptor hub, string method, out MethodDescriptor descriptor, params IJsonValue[] parameters)
        {
            descriptor = new MethodDescriptor
            {
                Hub = hub,
                Invoker = (h, args) =>
                {
                    var pkg = ((dynamic)args[0]);

                    //default to broadcast only to others
                    IClientProxy proxy = h.Clients.Others;
                    if (pkg.recipients == "ALL")
                        proxy = h.Clients.All;
                    else if (pkg.recipients == "SELF")
                        proxy = h.Clients.Caller;

                    var _appId = h.Context.ConnectionId;
                    dynamic _op = false;

                    //How to deal with concurrent requests?
                    //This is the derby/racer conflict resolution problem
                    //Like -- what if two users perform an update at the same time?
                    //For now, the broadcast is just sent to all....
                    //but an in-out pub/sub redis store that caches the requests
                    //and only executes the LAST one might be a simple solution

                    if (pkg.appBoxr != null)
                    {
                        var _clientId = pkg.clientId.ToString();
                        var _repo = GlobalHost.DependencyResolver.Resolve<IDataLayer>();
                        var appBoxr = (dynamic)pkg.appBoxr;

                        string process = appBoxr.process.top.ToString();

                        if (process == "GET")
                        {
                            _op = _repo.Get(appBoxr.queries);
                        }
                        else if (process == "SAVE")
                        {
                            _op = _repo.Save(appBoxr.models.ToString());
                        }
                        else if (process == "DELETE")
                        {
                            _op = _repo.Delete(new { ids = appBoxr.ids.ToString(), collection = appBoxr.collection });
                        }
                    }

                    //result is always 2nd param of GET SAVE and DELETE ops
                    return proxy.Invoke(method, pkg, _op);
                },
                Name = method,
                Attributes = new List<AuthAttribute>() { new AuthAttribute() },
                Parameters = Enumerable.Range(0, parameters.Length).Select(i => new Microsoft.AspNet.SignalR.Hubs.ParameterDescriptor { Name = "p_" + i, ParameterType = typeof(object) }).ToArray(),
                ReturnType = typeof(Task)
            };

            return true;
        }

 /// <summary>
 /// Builds a dictionary of all possible methods on a given hub.
 /// Single entry contains a collection of available overloads for a given method name (key).
 /// This dictionary is being cached afterwards.
 /// </summary>
 /// <param name="hub">Hub to build cache for</param>
 /// <returns>Dictionary of available methods</returns>
 private static IDictionary<string, IEnumerable<MethodDescriptor>> BuildMethodCacheFor(HubDescriptor hub)
 {
     return ReflectionHelper.GetExportedHubMethods(hub.HubType)
         .GroupBy(GetMethodName, StringComparer.OrdinalIgnoreCase)
         .ToDictionary(group => group.Key,
                       group => group.Select(oload => GetMethodDescriptor(group.Key, hub, oload)),
                       StringComparer.OrdinalIgnoreCase);
 }

        public override bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
        {
            var token = request.Cookies[AuthCookieName()].Value;
            var user = skUserRepository.GetUserByToken(token);

            if (user == null) return false;
            request.Environment["UserName"] = user.Alias.ToUpperInvariant();
            return true;
        }

        public IHub Create(HubDescriptor descriptor)
        {
            if(descriptor.Type == null)
            {
                return null;
            }

            object hub = _resolver.Resolve(descriptor.Type) ?? Activator.CreateInstance(descriptor.Type);
            return hub as IHub;
        }

        public IHub Create(HubDescriptor descriptor)
        {
            if (descriptor == null)
                throw new ArgumentNullException("descriptor");

            if (descriptor.HubType == null)
                return null;

            object hub = _container.Resolve(descriptor.HubType) ?? Activator.CreateInstance(descriptor.HubType);
            return hub as IHub;
        }

 public bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
 {
     switch (Mode)
     {
         case AuthorizeMode.Both:
         case AuthorizeMode.Outgoing:
             return UserAuthorized(request.User);
         default:
             Debug.Assert(Mode == AuthorizeMode.Incoming); // Guard in case new values are added to the enum
             return true;
     }
 }

        public void Create_Hub_ReturnsHubProxy()
        {                                    
            var container = new ServiceContainer();
            container.EnableSignalR();
            container.Register<SampleHub>(new PerScopeLifetime());
            var activator = new LightInjectHubActivator(container);                     
            var hubDescriptor = new HubDescriptor { HubType = typeof(SampleHub) };
            
            var hub = activator.Create(hubDescriptor);

            Assert.IsInstanceOfType(hub, typeof(IProxy));
        }

 public void Create_Hub_StartsScope()
 {
     var container = new ServiceContainer();
     container.EnableSignalR();
     container.Register<SampleHub>();
     var activator = new LightInjectHubActivator(container);
     var hubDescriptor = new HubDescriptor { HubType = typeof(SampleHub) };
     using (activator.Create(hubDescriptor))
     {
         Assert.IsNotNull(container.ScopeManagerProvider.GetScopeManager().CurrentScope);
     }                       
 }

        public void CorrectQualifiedName()
        {
            string hubName = "MyHubDescriptor",
                   unqualifiedName = "MyUnqualifiedName";

            HubDescriptor hubDescriptor = new HubDescriptor()
            {
                Name = hubName
            };

            Assert.Equal(hubDescriptor.CreateQualifiedName(unqualifiedName), hubName + "." + unqualifiedName);
        }

 public override bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
 {
     try
     {
         return Authorize(request);
     }
     catch (Exception e)
     {
         log.ErrorFormat("AuthorizeHubConnection error: {0}, {1}, {2}", e, e.StackTrace, e.InnerException != null ? e.InnerException.Message : string.Empty);
         return false;
     }
 }

        public override bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
        {
            var username = request.Headers[Settings.Default.UsernameHeader]??request.QueryString[Settings.Default.UsernameHeader];
            request.Environment["server.User"] = new GenericPrincipal(new ExcelServiceIdentity(username), new string[] { });
            //request.GetOwinContext().Authentication.User = new GenericPrincipal(new ExcelServiceIdentity(username), new string[] { });
            if (!string.IsNullOrWhiteSpace(username))
            {
                return true;
            }

            return false;
        }

 public override bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
 {
     try
     {
         var login = request.Headers["login"];
         var token = new Guid(request.Headers["token"]);
         return _authorizeStrategy.Authorize(login, token);
     }
     catch (Exception ex)
     {
         return false;
     }
 }

 public IHub Create(HubDescriptor descriptor)
 {
     IHub hub;
     if (!typeof(ILifetimeHub).IsAssignableFrom(descriptor.HubType))
     {
         hub = _lifetimeScope.Resolve(descriptor.HubType) as IHub;
     }
     else
     {
         hub = _lifetimeHubManager.ResolveHub<ILifetimeHub>(descriptor.HubType, _lifetimeScope);
     }
     return hub;
 }

        public IHub Create(HubDescriptor descriptor)
        {
            if (descriptor == null)
            {
                throw new ArgumentNullException("descriptor");
            }

            if (descriptor.HubType == null)
            {
                return null;
            }

            return ActivatorUtilities.CreateInstance(_serviceProvider, descriptor.HubType) as IHub;
        }

        public void Dispose_Hub_ClosesScope()
        {
            var container = new ServiceContainer();
            container.EnableSignalR();
            container.Register<SampleHub>();
            var activator = new LightInjectHubActivator(container);
            var hubDescriptor = new HubDescriptor { HubType = typeof(SampleHub) };

            var hub = activator.Create(hubDescriptor);

            hub.Dispose();

            Assert.IsNull(container.ScopeManagerProvider.GetScopeManager().CurrentScope);
        }

        public IHub Create(HubDescriptor descriptor)
        {
            if (descriptor == null)
            {
                throw new ArgumentNullException("descriptor");
            }

            if (descriptor.HubType == null)
            {
                return null;
            }

            return _kernel.TryGet(descriptor.HubType) as IHub;
        }

        public override bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
        {
            var token = request.QueryString.Get("Bearer");
            var authenticationTicket = Startup.AuthServerOptions.AccessTokenFormat.Unprotect(token);

            if (authenticationTicket == null || authenticationTicket.Identity == null || !authenticationTicket.Identity.IsAuthenticated)
            {
                return false;
            }

            request.Environment["server.User"] = new ClaimsPrincipal(authenticationTicket.Identity);
            request.Environment["server.Username"] = authenticationTicket.Identity.Name;
            request.GetHttpContext().User = new ClaimsPrincipal(authenticationTicket.Identity);
            return true;
        }