239 lines
8.8 KiB
C#
239 lines
8.8 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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using ConfigurationManager = System.Configuration.ConfigurationManager;
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namespace ASC.Data.Backup;
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[Scope]
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public class DbBackupProvider : IBackupProvider
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{
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public string Name => "databases";
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private readonly List<string> _processedTables = new List<string>();
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private readonly DbHelper _dbHelper;
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private readonly TempStream _tempStream;
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public DbBackupProvider(DbHelper dbHelper, TempStream tempStream)
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{
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_dbHelper = dbHelper;
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_tempStream = tempStream;
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}
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public event EventHandler<ProgressChangedEventArgs> ProgressChanged;
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public Task<IEnumerable<XElement>> GetElements(int tenant, string[] configs, IDataWriteOperator writer)
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{
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_processedTables.Clear();
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var xml = new List<XElement>();
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var connectionKeys = new Dictionary<string, string>();
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foreach (var connectionString in GetConnectionStrings(configs))
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{
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//do not save the base, having the same provider and connection string is not to duplicate
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//data, but also expose the ref attribute of repetitive bases for the correct recovery
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var node = new XElement(connectionString.Name);
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xml.Add(node);
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var connectionKey = connectionString.ProviderName + connectionString.ConnectionString;
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if (connectionKeys.TryGetValue(connectionKey, out var value))
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{
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node.Add(new XAttribute("ref", value));
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}
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else
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{
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connectionKeys.Add(connectionKey, connectionString.Name);
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node.Add(BackupDatabase(tenant, connectionString, writer));
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}
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}
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return Task.FromResult(xml.AsEnumerable());
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}
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public Task LoadFrom(IEnumerable<XElement> elements, int tenant, string[] configs, IDataReadOperator reader)
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{
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_processedTables.Clear();
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foreach (var connectionString in GetConnectionStrings(configs))
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{
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RestoreDatabase(connectionString, elements, reader);
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}
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return Task.CompletedTask;
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}
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public IEnumerable<ConnectionStringSettings> GetConnectionStrings(string[] configs)
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{
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/* if (configs.Length == 0)
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{
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configs = new string[] { AppDomain.CurrentDomain.SetupInformation.ConfigurationFile };
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}
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var connectionStrings = new List<ConnectionStringSettings>();
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foreach (var config in configs)
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{
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connectionStrings.AddRange(GetConnectionStrings(GetConfiguration(config)));
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}
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return connectionStrings.GroupBy(cs => cs.Name).Select(g => g.First());*/
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return null;
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}
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public IEnumerable<ConnectionStringSettings> GetConnectionStrings(Configuration cfg)
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{
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var connectionStrings = new List<ConnectionStringSettings>();
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foreach (ConnectionStringSettings connectionString in cfg.ConnectionStrings.ConnectionStrings)
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{
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if (connectionString.Name == "LocalSqlServer" || connectionString.Name == "readonly")
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{
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continue;
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}
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connectionStrings.Add(connectionString);
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if (connectionString.ConnectionString.Contains("|DataDirectory|"))
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{
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connectionString.ConnectionString = connectionString.ConnectionString.Replace("|DataDirectory|", Path.GetDirectoryName(cfg.FilePath) + '\\');
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}
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}
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return connectionStrings;
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}
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private void OnProgressChanged(string status, int progress)
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{
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ProgressChanged?.Invoke(this, new ProgressChangedEventArgs(status, progress));
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}
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private Configuration GetConfiguration(string config)
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{
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if (config.Contains(Path.DirectorySeparatorChar) && !Uri.IsWellFormedUriString(config, UriKind.Relative))
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{
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var map = new ExeConfigurationFileMap
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{
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ExeConfigFilename = string.Equals(Path.GetExtension(config), ".config", StringComparison.OrdinalIgnoreCase) ? config : CrossPlatform.PathCombine(config, "Web.config")
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};
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return ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);
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}
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return ConfigurationManager.OpenExeConfiguration(config);
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}
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private List<XElement> BackupDatabase(int tenant, ConnectionStringSettings connectionString, IDataWriteOperator writer)
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{
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var xml = new List<XElement>();
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var errors = 0;
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var timeout = TimeSpan.FromSeconds(1);
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var tables = _dbHelper.GetTables();
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for (var i = 0; i < tables.Count; i++)
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{
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var table = tables[i];
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OnProgressChanged(table, (int)(i / (double)tables.Count * 100));
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if (_processedTables.Contains(table, StringComparer.InvariantCultureIgnoreCase))
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{
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continue;
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}
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xml.Add(new XElement(table));
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DataTable dataTable;
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while (true)
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{
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try
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{
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dataTable = _dbHelper.GetTable(table, tenant);
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break;
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}
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catch
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{
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errors++;
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if (20 < errors)
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{
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throw;
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}
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Thread.Sleep(timeout);
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}
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}
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foreach (DataColumn c in dataTable.Columns)
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{
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if (c.DataType == typeof(DateTime))
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{
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c.DateTimeMode = DataSetDateTime.Unspecified;
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}
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}
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using (var file = _tempStream.Create())
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{
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dataTable.WriteXml(file, XmlWriteMode.WriteSchema);
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writer.WriteEntry($"{Name}\\{connectionString.Name}\\{table}".ToLower(), file);
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}
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_processedTables.Add(table);
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}
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return xml;
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}
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private void RestoreDatabase(ConnectionStringSettings connectionString, IEnumerable<XElement> elements, IDataReadOperator reader)
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{
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var dbName = connectionString.Name;
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var dbElement = elements.SingleOrDefault(e => string.Equals(e.Name.LocalName, connectionString.Name, StringComparison.OrdinalIgnoreCase));
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if (dbElement != null && dbElement.Attribute("ref") != null)
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{
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dbName = dbElement.Attribute("ref").Value;
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dbElement = elements.Single(e => string.Equals(e.Name.LocalName, dbElement.Attribute("ref").Value, StringComparison.OrdinalIgnoreCase));
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}
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if (dbElement == null)
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{
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return;
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}
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var tables = _dbHelper.GetTables();
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for (var i = 0; i < tables.Count; i++)
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{
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var table = tables[i];
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OnProgressChanged(table, (int)(i / (double)tables.Count * 100));
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if (_processedTables.Contains(table, StringComparer.InvariantCultureIgnoreCase))
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{
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continue;
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}
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if (dbElement.Element(table) != null)
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{
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using (var stream = reader.GetEntry($"{Name}\\{dbName}\\{table}".ToLower()))
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{
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var data = new DataTable();
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data.ReadXml(stream);
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_dbHelper.SetTable(data);
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}
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_processedTables.Add(table);
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}
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}
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}
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}
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