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reduce device discovery traffic

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pull/1154/head
Luke Pulverenti 7 years ago
parent 4704d22944
commit e0d5f7d158
4 changed files with 130 additions and 246 deletions
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46
Emby.Dlna/Ssdp/DeviceDiscovery.cs
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@ -19,13 +19,12 @@ using Rssdp.Infrastructure;
namespace Emby.Dlna.Ssdp
{
public class DeviceDiscovery : IDeviceDiscovery, IDisposable
public class DeviceDiscovery : IDeviceDiscovery
{
private bool _disposed;
private readonly ILogger _logger;
private readonly IServerConfigurationManager _config;
private readonly CancellationTokenSource _tokenSource;
public event EventHandler<GenericEventArgs<UpnpDeviceInfo>> DeviceDiscovered;
public event EventHandler<GenericEventArgs<UpnpDeviceInfo>> DeviceLeft;
@ -37,8 +36,6 @@ namespace Emby.Dlna.Ssdp
public DeviceDiscovery(ILogger logger, IServerConfigurationManager config, ISocketFactory socketFactory, ITimerFactory timerFactory)
{
_tokenSource = new CancellationTokenSource();
_logger = logger;
_config = config;
_socketFactory = socketFactory;
@ -59,39 +56,10 @@ namespace Emby.Dlna.Ssdp
_deviceLocator.DeviceAvailable += deviceLocator_DeviceAvailable;
_deviceLocator.DeviceUnavailable += _DeviceLocator_DeviceUnavailable;
// Perform a search so we don't have to wait for devices to broadcast notifications
// again to get any results right away (notifications are broadcast periodically).
StartAsyncSearch();
}
private void StartAsyncSearch()
{
Task.Factory.StartNew(async (o) =>
{
while (!_tokenSource.IsCancellationRequested)
{
try
{
// Enable listening for notifications (optional)
_deviceLocator.StartListeningForNotifications();
await _deviceLocator.SearchAsync(_tokenSource.Token).ConfigureAwait(false);
var dueTime = TimeSpan.FromSeconds(5);
var interval = TimeSpan.FromSeconds(_config.GetDlnaConfiguration().ClientDiscoveryIntervalSeconds);
var delay = _config.GetDlnaConfiguration().ClientDiscoveryIntervalSeconds * 1000;
await Task.Delay(delay, _tokenSource.Token).ConfigureAwait(false);
}
catch (OperationCanceledException)
{
}
catch (Exception ex)
{
_logger.ErrorException("Error searching for devices", ex);
}
}
}, CancellationToken.None, TaskCreationOptions.LongRunning);
_deviceLocator.RestartBroadcastTimer(dueTime, interval);
}
// Process each found device in the event handler
@ -141,7 +109,11 @@ namespace Emby.Dlna.Ssdp
if (!_disposed)
{
_disposed = true;
_tokenSource.Cancel();
if (_deviceLocator != null)
{
_deviceLocator.Dispose();
_deviceLocator = null;
}
}
}
}

107
MediaBrowser.WebDashboard/Api/DashboardService.cs
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@ -139,6 +139,23 @@ namespace MediaBrowser.WebDashboard.Api
_memoryStreamFactory = memoryStreamFactory;
}
/// <summary>
/// Gets the dashboard UI path.
/// </summary>
/// <value>The dashboard UI path.</value>
public string DashboardUIPath
{
get
{
if (!string.IsNullOrEmpty(_serverConfigurationManager.Configuration.DashboardSourcePath))
{
return _serverConfigurationManager.Configuration.DashboardSourcePath;
}
return Path.Combine(_serverConfigurationManager.ApplicationPaths.ApplicationResourcesPath, "dashboard-ui");
}
}
public object Get(GetFavIcon request)
{
return Get(new GetDashboardResource
@ -176,7 +193,7 @@ namespace MediaBrowser.WebDashboard.Api
if (plugin != null && stream != null)
{
return _resultFactory.GetStaticResult(Request, plugin.Version.ToString().GetMD5(), null, null, MimeTypes.GetMimeType("page.html"), () => GetPackageCreator().ModifyHtml("dummy.html", stream, null, _appHost.ApplicationVersion.ToString(), null));
return _resultFactory.GetStaticResult(Request, plugin.Version.ToString().GetMD5(), null, null, MimeTypes.GetMimeType("page.html"), () => GetPackageCreator(DashboardUIPath).ModifyHtml("dummy.html", stream, null, _appHost.ApplicationVersion.ToString(), null));
}
throw new ResourceNotFoundException();
@ -274,9 +291,11 @@ namespace MediaBrowser.WebDashboard.Api
path = path.Replace("bower_components" + _appHost.ApplicationVersion, "bower_components", StringComparison.OrdinalIgnoreCase);
var contentType = MimeTypes.GetMimeType(path);
var basePath = DashboardUIPath;
// Bounce them to the startup wizard if it hasn't been completed yet
if (!_serverConfigurationManager.Configuration.IsStartupWizardCompleted && path.IndexOf("wizard", StringComparison.OrdinalIgnoreCase) == -1 && GetPackageCreator().IsCoreHtml(path))
if (!_serverConfigurationManager.Configuration.IsStartupWizardCompleted &&
path.IndexOf("wizard", StringComparison.OrdinalIgnoreCase) == -1 && GetPackageCreator(basePath).IsCoreHtml(path))
{
// But don't redirect if an html import is being requested.
if (path.IndexOf("bower_components", StringComparison.OrdinalIgnoreCase) == -1)
@ -296,7 +315,7 @@ namespace MediaBrowser.WebDashboard.Api
!contentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase) &&
!contentType.StartsWith("font/", StringComparison.OrdinalIgnoreCase))
{
var stream = await GetResourceStream(path, localizationCulture).ConfigureAwait(false);
var stream = await GetResourceStream(basePath, path, localizationCulture).ConfigureAwait(false);
return _resultFactory.GetResult(stream, contentType);
}
@ -311,7 +330,7 @@ namespace MediaBrowser.WebDashboard.Api
var cacheKey = (_appHost.ApplicationVersion + (localizationCulture ?? string.Empty) + path).GetMD5();
return await _resultFactory.GetStaticResult(Request, cacheKey, null, cacheDuration, contentType, () => GetResourceStream(path, localizationCulture)).ConfigureAwait(false);
return await _resultFactory.GetStaticResult(Request, cacheKey, null, cacheDuration, contentType, () => GetResourceStream(basePath, path, localizationCulture)).ConfigureAwait(false);
}
private string GetLocalizationCulture()
@ -322,86 +341,72 @@ namespace MediaBrowser.WebDashboard.Api
/// <summary>
/// Gets the resource stream.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="localizationCulture">The localization culture.</param>
/// <returns>Task{Stream}.</returns>
private Task<Stream> GetResourceStream(string path, string localizationCulture)
private Task<Stream> GetResourceStream(string basePath, string virtualPath, string localizationCulture)
{
return GetPackageCreator()
.GetResource(path, null, localizationCulture, _appHost.ApplicationVersion.ToString());
return GetPackageCreator(basePath)
.GetResource(virtualPath, null, localizationCulture, _appHost.ApplicationVersion.ToString());
}
private PackageCreator GetPackageCreator()
private PackageCreator GetPackageCreator(string basePath)
{
return new PackageCreator(_fileSystem, _logger, _serverConfigurationManager, _memoryStreamFactory);
return new PackageCreator(basePath, _fileSystem, _logger, _serverConfigurationManager, _memoryStreamFactory);
}
public async Task<object> Get(GetDashboardPackage request)
{
var mode = request.Mode;
var path = !string.IsNullOrWhiteSpace(mode) ?
Path.Combine(_serverConfigurationManager.ApplicationPaths.ProgramDataPath, "webclient-dump")
var inputPath = string.IsNullOrWhiteSpace(mode) ?
DashboardUIPath
: "C:\\dev\\emby-web-mobile-master\\dist";
var targetPath = !string.IsNullOrWhiteSpace(mode) ?
inputPath
: "C:\\dev\\emby-web-mobile\\src";
try
{
_fileSystem.DeleteDirectory(path, true);
}
catch (IOException)
{
var packageCreator = GetPackageCreator(inputPath);
}
if (!string.Equals(inputPath, targetPath, StringComparison.OrdinalIgnoreCase))
{
try
{
_fileSystem.DeleteDirectory(targetPath, true);
}
catch (IOException)
{
var creator = GetPackageCreator();
}
CopyDirectory(creator.DashboardUIPath, path);
CopyDirectory(inputPath, targetPath);
}
string culture = null;
var appVersion = _appHost.ApplicationVersion.ToString();
// Try to trim the output size a bit
var bowerPath = Path.Combine(path, "bower_components");
if (!string.IsNullOrWhiteSpace(mode))
{
// Delete things that are unneeded in an attempt to keep the output as trim as possible
DeleteFoldersByName(Path.Combine(bowerPath, "emby-webcomponents", "fonts"), "roboto");
_fileSystem.DeleteDirectory(Path.Combine(path, "css", "images", "tour"), true);
}
await DumpHtml(creator.DashboardUIPath, path, mode, culture, appVersion);
await DumpHtml(packageCreator, inputPath, targetPath, mode, culture, appVersion);
return "";
}
private void DeleteFoldersByName(string path, string name)
{
var directories = _fileSystem.GetDirectories(path, true)
.Where(i => string.Equals(i.Name, name, StringComparison.OrdinalIgnoreCase))
.ToList();
foreach (var directory in directories)
{
_fileSystem.DeleteDirectory(directory.FullName, true);
}
}
private async Task DumpHtml(string source, string destination, string mode, string culture, string appVersion)
private async Task DumpHtml(PackageCreator packageCreator, string source, string destination, string mode, string culture, string appVersion)
{
foreach (var file in _fileSystem.GetFiles(source))
{
var filename = file.Name;
await DumpFile(filename, Path.Combine(destination, filename), mode, culture, appVersion).ConfigureAwait(false);
if (!string.Equals(file.Extension, ".html", StringComparison.OrdinalIgnoreCase))
{
continue;
}
await DumpFile(packageCreator, filename, Path.Combine(destination, filename), mode, culture, appVersion).ConfigureAwait(false);
}
}
private async Task DumpFile(string resourceVirtualPath, string destinationFilePath, string mode, string culture, string appVersion)
private async Task DumpFile(PackageCreator packageCreator, string resourceVirtualPath, string destinationFilePath, string mode, string culture, string appVersion)
{
using (var stream = await GetPackageCreator().GetResource(resourceVirtualPath, mode, culture, appVersion).ConfigureAwait(false))
using (var stream = await packageCreator.GetResource(resourceVirtualPath, mode, culture, appVersion).ConfigureAwait(false))
{
using (var fs = _fileSystem.GetFileStream(destinationFilePath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read))
{

50
MediaBrowser.WebDashboard/Api/PackageCreator.cs
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@ -19,31 +19,33 @@ namespace MediaBrowser.WebDashboard.Api
private readonly ILogger _logger;
private readonly IServerConfigurationManager _config;
private readonly IMemoryStreamFactory _memoryStreamFactory;
private readonly string _basePath;
public PackageCreator(IFileSystem fileSystem, ILogger logger, IServerConfigurationManager config, IMemoryStreamFactory memoryStreamFactory)
public PackageCreator(string basePath, IFileSystem fileSystem, ILogger logger, IServerConfigurationManager config, IMemoryStreamFactory memoryStreamFactory)
{
_fileSystem = fileSystem;
_logger = logger;
_config = config;
_memoryStreamFactory = memoryStreamFactory;
_basePath = basePath;
}
public async Task<Stream> GetResource(string path,
public async Task<Stream> GetResource(string virtualPath,
string mode,
string localizationCulture,
string appVersion)
{
var resourceStream = GetRawResourceStream(path);
var resourceStream = GetRawResourceStream(virtualPath);
if (resourceStream != null)
{
// Don't apply any caching for html pages
// jQuery ajax doesn't seem to handle if-modified-since correctly
if (IsFormat(path, "html"))
if (IsFormat(virtualPath, "html"))
{
if (IsCoreHtml(path))
if (IsCoreHtml(virtualPath))
{
resourceStream = await ModifyHtml(path, resourceStream, mode, appVersion, localizationCulture).ConfigureAwait(false);
resourceStream = await ModifyHtml(virtualPath, resourceStream, mode, appVersion, localizationCulture).ConfigureAwait(false);
}
}
}
@ -62,33 +64,13 @@ namespace MediaBrowser.WebDashboard.Api
return Path.GetExtension(path).EndsWith(format, StringComparison.OrdinalIgnoreCase);
}
/// <summary>
/// Gets the dashboard UI path.
/// </summary>
/// <value>The dashboard UI path.</value>
public string DashboardUIPath
{
get
{
if (!string.IsNullOrEmpty(_config.Configuration.DashboardSourcePath))
{
return _config.Configuration.DashboardSourcePath;
}
return Path.Combine(_config.ApplicationPaths.ApplicationResourcesPath, "dashboard-ui");
}
}
/// <summary>
/// Gets the dashboard resource path.
/// </summary>
/// <param name="virtualPath">The virtual path.</param>
/// <returns>System.String.</returns>
private string GetDashboardResourcePath(string virtualPath)
{
var rootPath = DashboardUIPath;
var fullPath = Path.Combine(rootPath, virtualPath.Replace('/', _fileSystem.DirectorySeparatorChar));
var fullPath = Path.Combine(_basePath, virtualPath.Replace('/', _fileSystem.DirectorySeparatorChar));
try
{
@ -100,7 +82,7 @@ namespace MediaBrowser.WebDashboard.Api
}
// Don't allow file system access outside of the source folder
if (!_fileSystem.ContainsSubPath(rootPath, fullPath))
if (!_fileSystem.ContainsSubPath(_basePath, fullPath))
{
throw new SecurityException("Access denied");
}
@ -118,10 +100,8 @@ namespace MediaBrowser.WebDashboard.Api
path = GetDashboardResourcePath(path);
var parent = Path.GetDirectoryName(path);
var basePath = DashboardUIPath;
return string.Equals(basePath, parent, StringComparison.OrdinalIgnoreCase) ||
string.Equals(Path.Combine(basePath, "voice"), parent, StringComparison.OrdinalIgnoreCase);
return string.Equals(_basePath, parent, StringComparison.OrdinalIgnoreCase) ||
string.Equals(Path.Combine(_basePath, "voice"), parent, StringComparison.OrdinalIgnoreCase);
}
/// <summary>
@ -319,11 +299,9 @@ namespace MediaBrowser.WebDashboard.Api
/// <summary>
/// Gets the raw resource stream.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>Task{Stream}.</returns>
private Stream GetRawResourceStream(string path)
private Stream GetRawResourceStream(string virtualPath)
{
return _fileSystem.GetFileStream(GetDashboardResourcePath(path), FileOpenMode.Open, FileAccessMode.Read, FileShareMode.ReadWrite, true);
return _fileSystem.GetFileStream(GetDashboardResourcePath(virtualPath), FileOpenMode.Open, FileAccessMode.Read, FileShareMode.ReadWrite, true);
}
}

173
RSSDP/SsdpDeviceLocatorBase.cs
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@ -24,11 +24,9 @@ namespace Rssdp.Infrastructure
private List<DiscoveredSsdpDevice> _Devices;
private ISsdpCommunicationsServer _CommunicationsServer;
private IList<DiscoveredSsdpDevice> _SearchResults;
private object _SearchResultsSynchroniser;
private ITimer _ExpireCachedDevicesTimer;
private ITimer _BroadcastTimer;
private ITimerFactory _timerFactory;
private object _timerLock = new object();
private static readonly TimeSpan DefaultSearchWaitTime = TimeSpan.FromSeconds(4);
private static readonly TimeSpan OneSecond = TimeSpan.FromSeconds(1);
@ -48,7 +46,6 @@ namespace Rssdp.Infrastructure
_timerFactory = timerFactory;
_CommunicationsServer.ResponseReceived += CommsServer_ResponseReceived;
_SearchResultsSynchroniser = new object();
_Devices = new List<DiscoveredSsdpDevice>();
}
@ -92,11 +89,52 @@ namespace Rssdp.Infrastructure
#region Search Overloads
public void RestartBroadcastTimer(TimeSpan dueTime, TimeSpan period)
{
lock (_timerLock)
{
if (_BroadcastTimer == null)
{
_BroadcastTimer = _timerFactory.Create(OnBroadcastTimerCallback, null, dueTime, period);
}
else
{
_BroadcastTimer.Change(dueTime, period);
}
}
}
public void DisposeBroadcastTimer()
{
lock (_timerLock)
{
if (_BroadcastTimer != null)
{
_BroadcastTimer.Dispose();
_BroadcastTimer = null;
}
}
}
private async void OnBroadcastTimerCallback(object state)
{
StartListeningForNotifications();
RemoveExpiredDevicesFromCache();
try
{
await SearchAsync(CancellationToken.None).ConfigureAwait(false);
}
catch (Exception ex)
{
}
}
/// <summary>
/// Performs a search for all devices using the default search timeout.
/// </summary>
/// <returns>A task whose result is an <see cref="IEnumerable{T}"/> of <see cref="DiscoveredSsdpDevice" /> instances, representing all found devices.</returns>
public Task<IEnumerable<DiscoveredSsdpDevice>> SearchAsync(CancellationToken cancellationToken)
private Task SearchAsync(CancellationToken cancellationToken)
{
return SearchAsync(SsdpConstants.SsdpDiscoverAllSTHeader, DefaultSearchWaitTime, cancellationToken);
}
@ -111,8 +149,7 @@ namespace Rssdp.Infrastructure
/// <item><term>Device type</term><description>Fully qualified device type starting with urn: i.e urn:schemas-upnp-org:Basic:1</description></item>
/// </list>
/// </param>
/// <returns>A task whose result is an <see cref="IEnumerable{T}"/> of <see cref="DiscoveredSsdpDevice" /> instances, representing all found devices.</returns>
public Task<IEnumerable<DiscoveredSsdpDevice>> SearchAsync(string searchTarget)
private Task SearchAsync(string searchTarget)
{
return SearchAsync(searchTarget, DefaultSearchWaitTime, CancellationToken.None);
}
@ -121,13 +158,12 @@ namespace Rssdp.Infrastructure
/// Performs a search for all devices using the specified search timeout.
/// </summary>
/// <param name="searchWaitTime">The amount of time to wait for network responses to the search request. Longer values will likely return more devices, but increase search time. A value between 1 and 5 seconds is recommended by the UPnP 1.1 specification, this method requires the value be greater 1 second if it is not zero. Specify TimeSpan.Zero to return only devices already in the cache.</param>
/// <returns>A task whose result is an <see cref="IEnumerable{T}"/> of <see cref="DiscoveredSsdpDevice" /> instances, representing all found devices.</returns>
public Task<IEnumerable<DiscoveredSsdpDevice>> SearchAsync(TimeSpan searchWaitTime)
private Task SearchAsync(TimeSpan searchWaitTime)
{
return SearchAsync(SsdpConstants.SsdpDiscoverAllSTHeader, searchWaitTime, CancellationToken.None);
}
public async Task<IEnumerable<DiscoveredSsdpDevice>> SearchAsync(string searchTarget, TimeSpan searchWaitTime, CancellationToken cancellationToken)
private Task SearchAsync(string searchTarget, TimeSpan searchWaitTime, CancellationToken cancellationToken)
{
if (searchTarget == null) throw new ArgumentNullException("searchTarget");
if (searchTarget.Length == 0) throw new ArgumentException("searchTarget cannot be an empty string.", "searchTarget");
@ -136,48 +172,7 @@ namespace Rssdp.Infrastructure
ThrowIfDisposed();
if (_SearchResults != null) throw new InvalidOperationException("Search already in progress. Only one search at a time is allowed.");
_SearchResults = new List<DiscoveredSsdpDevice>();
// If searchWaitTime == 0 then we are only going to report unexpired cached items, not actually do a search.
if (searchWaitTime > TimeSpan.Zero)
await BroadcastDiscoverMessage(searchTarget, SearchTimeToMXValue(searchWaitTime), cancellationToken).ConfigureAwait(false);
lock (_SearchResultsSynchroniser)
{
foreach (var device in GetUnexpiredDevices().Where(NotificationTypeMatchesFilter))
{
DeviceFound(device, false, null);
}
}
if (searchWaitTime != TimeSpan.Zero)
await Task.Delay(searchWaitTime, cancellationToken).ConfigureAwait(false);
IEnumerable<DiscoveredSsdpDevice> retVal = null;
try
{
lock (_SearchResultsSynchroniser)
{
retVal = _SearchResults;
_SearchResults = null;
}
RemoveExpiredDevicesFromCache();
}
finally
{
var server = _CommunicationsServer;
try
{
if (server != null) // In case we were disposed while searching.
server.StopListeningForResponses();
}
catch (ObjectDisposedException) { }
}
return retVal;
return BroadcastDiscoverMessage(searchTarget, SearchTimeToMXValue(searchWaitTime), cancellationToken);
}
#endregion
@ -287,9 +282,7 @@ namespace Rssdp.Infrastructure
if (disposing)
{
var timer = _ExpireCachedDevicesTimer;
if (timer != null)
timer.Dispose();
DisposeBroadcastTimer();
var commsServer = _CommunicationsServer;
_CommunicationsServer = null;
@ -332,40 +325,9 @@ namespace Rssdp.Infrastructure
private void DeviceFound(DiscoveredSsdpDevice device, bool isNewDevice, IpAddressInfo localIpAddress)
{
// Don't raise the event if we've already done it for a cached
// version of this device, and the cached version isn't
// "significantly" different, i.e location and cachelifetime
// haven't changed.
var raiseEvent = false;
if (!NotificationTypeMatchesFilter(device)) return;
lock (_SearchResultsSynchroniser)
{
if (_SearchResults != null)
{
var existingDevice = FindExistingDeviceNotification(_SearchResults, device.NotificationType, device.Usn);
if (existingDevice == null)
{
_SearchResults.Add(device);
raiseEvent = true;
}
else
{
if (existingDevice.DescriptionLocation != device.DescriptionLocation || existingDevice.CacheLifetime != device.CacheLifetime)
{
_SearchResults.Remove(existingDevice);
_SearchResults.Add(device);
raiseEvent = true;
}
}
}
else
raiseEvent = true;
}
if (raiseEvent)
OnDeviceAvailable(device, isNewDevice, localIpAddress);
OnDeviceAvailable(device, isNewDevice, localIpAddress);
}
private bool NotificationTypeMatchesFilter(DiscoveredSsdpDevice device)
@ -450,8 +412,6 @@ namespace Rssdp.Infrastructure
};
AddOrUpdateDiscoveredDevice(device, localIpAddress);
ResetExpireCachedDevicesTimer();
}
}
@ -477,26 +437,9 @@ namespace Rssdp.Infrastructure
if (NotificationTypeMatchesFilter(deadDevice))
OnDeviceUnavailable(deadDevice, false);
}
ResetExpireCachedDevicesTimer();
}
}
private void ResetExpireCachedDevicesTimer()
{
if (IsDisposed) return;
if (_ExpireCachedDevicesTimer == null)
_ExpireCachedDevicesTimer = _timerFactory.Create(this.ExpireCachedDevices, null, System.Threading.Timeout.Infinite, System.Threading.Timeout.Infinite);
_ExpireCachedDevicesTimer.Change(60000, System.Threading.Timeout.Infinite);
}
private void ExpireCachedDevices(object state)
{
RemoveExpiredDevicesFromCache();
}
#region Header/Message Processing Utilities
private static string GetFirstHeaderStringValue(string headerName, HttpResponseMessage message)
@ -624,20 +567,6 @@ namespace Rssdp.Infrastructure
if (existingDevices != null && existingDevices.Any())
{
lock (_SearchResultsSynchroniser)
{
if (_SearchResults != null)
{
var resultsToRemove = (from result in _SearchResults where result.Usn == deviceUsn select result).ToArray();
foreach (var result in resultsToRemove)
{
if (this.IsDisposed) return true;
_SearchResults.Remove(result);
}
}
}
foreach (var removedDevice in existingDevices)
{
if (NotificationTypeMatchesFilter(removedDevice))

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