Review comments

Emby.Server.Implementations/WebSockets/WebSocketManager.cs

@@ -65,7 +65,7 @@ namespace Emby.Server.Implementations.WebSockets
                 ? Encoding.UTF8.GetString(messageBytes, 0, messageBytes.Length)
                 : Encoding.ASCII.GetString(messageBytes, 0, messageBytes.Length);
 
-            // All messages are expected to be json
+            // All messages are expected to be valid JSON objects
             if (!message.StartsWith("{", StringComparison.OrdinalIgnoreCase))
             {
                 _logger.LogDebug("Received web socket message that is not a json structure: {Message}", message);

MediaBrowser.Api/Playback/Progressive/BaseProgressiveStreamingService.cs

@@ -362,6 +362,7 @@ namespace MediaBrowser.Api.Playback.Progressive
 
             var contentType = state.GetMimeType(outputPath);
 
+            // TODO: The isHeadRequest is only here because ServiceStack will add Content-Length=0 to the response
             // Headers only
             if (isHeadRequest)
             {