230 lines
9.3 KiB
C#
230 lines
9.3 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2020
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Xml.Linq;
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using ASC.Common;
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using ASC.Common.Utils;
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namespace ASC.Data.Backup
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{
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[Scope]
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public class DbBackupProvider : IBackupProvider
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{
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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 string Name
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{
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get { return "databases"; }
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}
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public DbBackupProvider(DbHelper dbHelper, TempStream tempStream)
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{
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this.dbHelper = dbHelper;
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this.tempStream = tempStream;
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}
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public 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 xml;
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}
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public void 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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}
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public event EventHandler<ProgressChangedEventArgs> ProgressChanged;
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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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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") continue;
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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 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) throw;
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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)) c.DateTimeMode = DataSetDateTime.Unspecified;
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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) return;
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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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}
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