imported signalr 1.1.3 into NzbDrone.

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

@@ -0,0 +1,50 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
+
+using System;
+
+namespace Microsoft.AspNet.SignalR.Owin.Infrastructure
+{
+    internal static class PrefixMatcher
+    {
+        public static bool IsMatch(string pathBase, string path)
+        {
+            pathBase = EnsureStartsWithSlash(pathBase);
+            path = EnsureStartsWithSlash(path);
+
+            var pathLength = path.Length;
+            var pathBaseLength = pathBase.Length;
+
+            if (pathLength < pathBaseLength)
+            {
+                return false;
+            }
+
+            if (pathLength > pathBaseLength && path[pathBaseLength] != '/')
+            {
+                return false;
+            }
+
+            if (!path.StartsWith(pathBase, StringComparison.OrdinalIgnoreCase))
+            {
+                return false;
+            }
+
+            return true;
+        }
+
+        private static string EnsureStartsWithSlash(string path)
+        {
+            if (path.Length == 0)
+            {
+                return path;
+            }
+
+            if (path[0] == '/')
+            {
+                return path;
+            }
+
+            return '/' + path;
+        }
+    }
+}