imported signalr 1.1.3 into NzbDrone.

src/Microsoft.AspNet.SignalR.Owin/Handlers/PersistentConnectionHandler.cs

@@ -0,0 +1,43 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Microsoft.AspNet.SignalR.Hosting;
+using Microsoft.AspNet.SignalR.Owin.Infrastructure;
+
+namespace Microsoft.AspNet.SignalR.Owin.Handlers
+{
+    using AppFunc = Func<IDictionary<string, object>, Task>;
+
+    public class PersistentConnectionHandler
+    {
+        private readonly AppFunc _next;
+        private readonly string _path;
+        private readonly Type _connectionType;
+        private readonly ConnectionConfiguration _configuration;
+
+        public PersistentConnectionHandler(AppFunc next, string path, Type connectionType, ConnectionConfiguration configuration)
+        {
+            _next = next;
+            _path = path;
+            _connectionType = connectionType;
+            _configuration = configuration;
+        }
+
+        public Task Invoke(IDictionary<string, object> environment)
+        {
+            var path = environment.Get<string>(OwinConstants.RequestPath);
+            if (path == null || !PrefixMatcher.IsMatch(_path, path))
+            {
+                return _next(environment);
+            }
+
+            var connectionFactory = new PersistentConnectionFactory(_configuration.Resolver);
+            var connection = connectionFactory.CreateInstance(_connectionType);
+
+            var handler = new CallHandler(_configuration, connection);
+            return handler.Invoke(environment);
+        }
+    }
+}