imported signalr 1.1.3 into NzbDrone.

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

@@ -0,0 +1,48 @@
+// 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.Linq;
+
+namespace Microsoft.AspNet.SignalR.Owin.Infrastructure
+{
+    /// <summary>
+    /// Helper methods for creating and consuming CallParameters.Headers and ResultParameters.Headers.
+    /// </summary>
+    internal static class Headers
+    {
+        public static IDictionary<string, string[]> SetHeader(this IDictionary<string, string[]> headers,
+            string name, string value)
+        {
+            headers[name] = new[] { value };
+            return headers;
+        }
+
+        public static string[] GetHeaders(this IDictionary<string, string[]> headers,
+            string name)
+        {
+            string[] value;
+            return headers != null && headers.TryGetValue(name, out value) ? value : null;
+        }
+
+        public static string GetHeader(this IDictionary<string, string[]> headers,
+            string name)
+        {
+            var values = GetHeaders(headers, name);
+            if (values == null)
+            {
+                return null;
+            }
+
+            switch (values.Length)
+            {
+                case 0:
+                    return String.Empty;
+                case 1:
+                    return values[0];
+                default:
+                    return String.Join(",", values);
+            }
+        }
+    }
+}