imported signalr 1.1.3 into NzbDrone.

src/Microsoft.AspNet.SignalR.Owin/Infrastructure/OwinEnvironmentExtensions.cs

@@ -0,0 +1,69 @@
+// 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;
+
+namespace Microsoft.AspNet.SignalR.Owin
+{
+    internal static class OwinEnvironmentExtensions
+    {
+        internal static T Get<T>(this IDictionary<string, object> environment, string key)
+        {
+            object value;
+            return environment.TryGetValue(key, out value) ? (T)value : default(T);
+        }
+
+        internal static CancellationToken GetShutdownToken(this IDictionary<string, object> env)
+        {
+            object value;
+            return env.TryGetValue(OwinConstants.HostOnAppDisposing, out value)
+                && value is CancellationToken
+                ? (CancellationToken)value
+                : default(CancellationToken);
+        }
+
+        internal static string GetAppInstanceName(this IDictionary<string, object> environment)
+        {
+            object value;
+            if (environment.TryGetValue(OwinConstants.HostAppNameKey, out value))
+            {
+                var stringVal = value as string;
+
+                if (!String.IsNullOrEmpty(stringVal))
+                {
+                    return stringVal;
+                }
+            }
+
+            return null;
+        }
+
+        internal static bool SupportsWebSockets(this IDictionary<string, object> environment)
+        {
+            object value;
+            if (environment.TryGetValue(OwinConstants.ServerCapabilities, out value))
+            {
+                var capabilities = value as IDictionary<string, object>;
+                if (capabilities != null)
+                {
+                    return capabilities.ContainsKey(OwinConstants.WebSocketVersion);
+                }
+            }
+            return false;
+        }
+
+        internal static bool GetIsDebugEnabled(this IDictionary<string, object> environment)
+        {
+            object value;
+            if (environment.TryGetValue(OwinConstants.HostAppModeKey, out value))
+            {
+                var stringVal = value as string;
+                return !String.IsNullOrWhiteSpace(stringVal) &&
+                       OwinConstants.AppModeDevelopment.Equals(stringVal, StringComparison.OrdinalIgnoreCase);
+            }
+
+            return false;
+        }
+    }
+}