API Key for signalR connections

src/NzbDrone.SignalR/NzbDronePersistentConnection.cs

@@ -1,5 +1,7 @@
-using Microsoft.AspNet.SignalR;
+using Microsoft.AspNet.SignalR;
 using Microsoft.AspNet.SignalR.Infrastructure;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Configuration;
 
 namespace NzbDrone.SignalR
 {
@@ -12,9 +14,28 @@ namespace NzbDrone.SignalR
     {
         private IPersistentConnectionContext Context => ((ConnectionManager)GlobalHost.ConnectionManager).GetConnection(GetType());
 
+        private static string API_KEY;
+
+        public NzbDronePersistentConnection(IConfigFileProvider configFileProvider)
+        {
+            API_KEY = configFileProvider.ApiKey;
+        }
+
         public void BroadcastMessage(SignalRMessage message)
         {
             Context.Connection.Broadcast(message);
         }
+
+        protected override bool AuthorizeRequest(IRequest request)
+        {
+            var apiKey = request.QueryString["apiKey"];
+
+            if (apiKey.IsNotNullOrWhiteSpace() && apiKey.Equals(API_KEY))
+            {
+                return true;
+            }
+
+            return false;
+        }
     }
 }

src/UI/Shared/SignalRBroadcaster.js

@@ -26,7 +26,7 @@ module.exports = {
         var tryingToReconnect = false;
         var messengerId = 'signalR';
 
-        this.signalRconnection = $.connection(StatusModel.get('urlBase') + '/signalr');
+        this.signalRconnection = $.connection(StatusModel.get('urlBase') + '/signalr', { apiKey: window.NzbDrone.ApiKey });
 
         this.signalRconnection.stateChanged(function(change) {
             console.debug('SignalR: [{0}]'.format(getStatus(change.newState)));