2019-01-06 15:50:43 -05:00
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using System;
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2016-10-29 01:40:15 -04:00
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using System.IO;
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using System.Text;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Model.IO;
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2018-12-13 08:18:25 -05:00
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using Microsoft.Extensions.Logging;
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2016-10-29 01:40:15 -04:00
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2017-08-16 02:43:41 -04:00
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namespace Emby.Server.Implementations.Devices
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2016-10-29 01:40:15 -04:00
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{
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public class DeviceId
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{
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private readonly IApplicationPaths _appPaths;
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private readonly ILogger _logger;
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private readonly IFileSystem _fileSystem;
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private readonly object _syncLock = new object();
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private string CachePath => Path.Combine(_appPaths.DataPath, "device.txt");
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private string GetCachedId()
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{
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try
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{
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lock (_syncLock)
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{
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var value = File.ReadAllText(CachePath, Encoding.UTF8);
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2019-01-13 15:46:33 -05:00
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if (Guid.TryParse(value, out var guid))
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{
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return value;
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}
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2018-12-13 08:18:25 -05:00
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_logger.LogError("Invalid value found in device id file");
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}
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}
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catch (DirectoryNotFoundException)
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{
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}
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catch (FileNotFoundException)
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{
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error reading file");
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}
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return null;
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}
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private void SaveId(string id)
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{
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try
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{
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var path = CachePath;
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2019-01-26 15:47:11 -05:00
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_fileSystem.CreateDirectory(Path.GetDirectoryName(path));
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lock (_syncLock)
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{
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_fileSystem.WriteAllText(path, id, Encoding.UTF8);
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}
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error writing to file");
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}
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}
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private static string GetNewId()
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{
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return Guid.NewGuid().ToString("N");
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}
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private string GetDeviceId()
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{
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var id = GetCachedId();
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if (string.IsNullOrWhiteSpace(id))
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{
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id = GetNewId();
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SaveId(id);
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}
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return id;
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}
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private string _id;
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2019-01-17 17:55:05 -05:00
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public DeviceId(
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IApplicationPaths appPaths,
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ILoggerFactory loggerFactory,
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IFileSystem fileSystem)
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{
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2019-01-12 15:41:08 -05:00
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if (fileSystem == null)
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{
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throw new ArgumentNullException(nameof(fileSystem));
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}
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_appPaths = appPaths;
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_logger = loggerFactory.CreateLogger("SystemId");
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_fileSystem = fileSystem;
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}
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public string Value => _id ?? (_id = GetDeviceId());
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}
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}
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