reduce upnp traffic

MediaBrowser.Api/Playback/MediaInfoService.cs

@@ -18,16 +18,6 @@ using System.Threading.Tasks;
 
 namespace MediaBrowser.Api.Playback
 {
-    [Route("/Items/{Id}/MediaInfo", "GET", Summary = "Gets live playback media info for an item")]
-    public class GetLiveMediaInfo : IReturn<PlaybackInfoResponse>
-    {
-        [ApiMember(Name = "Id", Description = "Item Id", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "GET")]
-        public string Id { get; set; }
-
-        [ApiMember(Name = "UserId", Description = "User Id", IsRequired = true, DataType = "string", ParameterType = "query", Verb = "GET")]
-        public string UserId { get; set; }
-    }
-
     [Route("/Items/{Id}/PlaybackInfo", "GET", Summary = "Gets live playback media info for an item")]
     public class GetPlaybackInfo : IReturn<PlaybackInfoResponse>
     {
@@ -79,12 +69,6 @@ namespace MediaBrowser.Api.Playback
             return ToOptimizedResult(result);
         }
 
-        public async Task<object> Get(GetLiveMediaInfo request)
-        {
-            var result = await GetPlaybackInfo(request.Id, request.UserId, new[] { MediaType.Audio, MediaType.Video }).ConfigureAwait(false);
-            return ToOptimizedResult(result);
-        }
-
         public async Task<object> Post(OpenMediaSource request)
         {
             var authInfo = AuthorizationContext.GetAuthorizationInfo(Request);

MediaBrowser.Dlna/PlayTo/PlayToManager.cs

@@ -13,6 +13,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
+using System.Threading;
 
 namespace MediaBrowser.Dlna.PlayTo
 {
@@ -34,6 +35,9 @@ namespace MediaBrowser.Dlna.PlayTo
         private readonly DeviceDiscovery _deviceDiscovery;
         private readonly IMediaSourceManager _mediaSourceManager;
 
+        private readonly List<string> _nonRendererUrls = new List<string>();
+        private Timer _clearNonRenderersTimer;
+
         public PlayToManager(ILogger logger, ISessionManager sessionManager, ILibraryManager libraryManager, IUserManager userManager, IDlnaManager dlnaManager, IServerApplicationHost appHost, IImageProcessor imageProcessor, DeviceDiscovery deviceDiscovery, IHttpClient httpClient, IServerConfigurationManager config, IUserDataManager userDataManager, ILocalizationManager localization, IMediaSourceManager mediaSourceManager)
         {
             _logger = logger;
@@ -53,9 +57,19 @@ namespace MediaBrowser.Dlna.PlayTo
 
         public void Start()
         {
+            _clearNonRenderersTimer = new Timer(OnClearUrlTimerCallback, null, TimeSpan.FromMinutes(10), TimeSpan.FromMinutes(10));
+
             _deviceDiscovery.DeviceDiscovered += _deviceDiscovery_DeviceDiscovered;
         }
 
+        private void OnClearUrlTimerCallback(object state)
+        {
+            lock (_nonRendererUrls)
+            {
+                _nonRendererUrls.Clear();
+            }
+        }
+
         async void _deviceDiscovery_DeviceDiscovered(object sender, SsdpMessageEventArgs e)
         {
             var localIp = e.LocalIp;
@@ -85,11 +99,25 @@ namespace MediaBrowser.Dlna.PlayTo
             {
                 var uri = new Uri(location);
 
-                // TODO: Cache list of non-renderers by url to avoid repeating calls
+                lock (_nonRendererUrls)
+                {
+                    if (_nonRendererUrls.Contains(location, StringComparer.OrdinalIgnoreCase))
+                    {
+                        return;
+                    }
+                }
+
                 var device = await Device.CreateuPnpDeviceAsync(uri, _httpClient, _config, _logger).ConfigureAwait(false);
 
-                if (device.RendererCommands != null)
+                if (device.RendererCommands == null)
+                {
+                    lock (_nonRendererUrls)
                     {
+                        _nonRendererUrls.Add(location);
+                        return;
+                    }
+                }
+
                 var sessionInfo = await _sessionManager.LogSessionActivity(device.Properties.ClientType, _appHost.ApplicationVersion.ToString(), device.Properties.UUID, device.Properties.Name, uri.OriginalString, null)
                     .ConfigureAwait(false);
 
@@ -141,7 +169,6 @@ namespace MediaBrowser.Dlna.PlayTo
                     _logger.Info("DLNA Session created for {0} - {1}", device.Properties.Name, device.Properties.ModelName);
                 }
             }
-            }
             catch (Exception ex)
             {
                 _logger.ErrorException("Error creating PlayTo device.", ex);
@@ -156,6 +183,12 @@ namespace MediaBrowser.Dlna.PlayTo
         public void Dispose()
         {
             _deviceDiscovery.DeviceDiscovered -= _deviceDiscovery_DeviceDiscovered;
+
+            if (_clearNonRenderersTimer != null)
+            {
+                _clearNonRenderersTimer.Dispose();
+                _clearNonRenderersTimer = null;
+            }
         }
     }
 }

MediaBrowser.Dlna/Ssdp/SsdpHandler.cs

@@ -145,7 +145,7 @@ namespace MediaBrowser.Dlna.Ssdp
             values["MX"] = "3";
 
             // UDP is unreliable, so send 3 requests at a time (per Upnp spec, sec 1.1.2)
-            SendDatagram("M-SEARCH * HTTP/1.1", values, localIp, 1);
+            SendDatagram("M-SEARCH * HTTP/1.1", values, localIp, 2);
         }
 
         public void SendDatagram(string header,

MediaBrowser.Server.Implementations/Persistence/SqliteItemRepository.cs

@@ -436,7 +436,7 @@ namespace MediaBrowser.Server.Implementations.Persistence
                             _shrinkMemoryTimer = null;
                         }
 
-                        //_writeLock.Wait();
+                        _writeLock.Wait();
 
                         if (_connection != null)
                         {