Tyler Gill
38883285ee
By changing to IEnumerable, it is possible to iterate only a portion of the list, which is useful when not all entries are needed (e.g., when testing a connection). All existing backends have been updated, and any which were able to be changed to yield return results in a straightforward way now do. Many backends had a try/catch in the List() method. Due to the fact that yield returns can't be placed within a try/catch block, these have been refactored to either scope the try/catch to the parts that (should) be the only places throwing exceptions, so that exceptions are still caught and handled. Note that lazy evaluation may cause some changes in behavior - exceptions that were previously thrown at the point of invokation of List() may now be thrown while it is being enumerated. I believe this will not be problematic though, as the only well-known exception seems to be FolderMissingException, which should be thrown by Test(), but TestList() attempts to enumerate the list to force this exception. Any places that require the legacy behavior can get it by simply converting the lazy enumerable to a List()
302 lines
16 KiB
C#
302 lines
16 KiB
C#
using System;
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using System.IO;
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using System.Collections.Generic;
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using System.Linq;
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using Duplicati.Library.Main;
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using Duplicati.Library.Main.Volumes;
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using Duplicati.Library.Utility;
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using Newtonsoft.Json.Linq;
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namespace Duplicati.CommandLine.RecoveryTool
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{
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public static class Recompress
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{
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public static int Run(List<string> args, Dictionary<string, string> options, Library.Utility.IFilter filter)
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{
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if (args.Count != 4)
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{
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Console.WriteLine("Invalid argument count ({0} expected 4): {1}{2}", args.Count, Environment.NewLine, string.Join(Environment.NewLine, args));
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return 100;
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}
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string target_compr_module = args[1];
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if (!Library.DynamicLoader.CompressionLoader.Keys.Contains(target_compr_module))
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{
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Console.WriteLine("Target compression module not found: {0}{1}Modules supported: {2}", args[1], Environment.NewLine, string.Join(", ", Library.DynamicLoader.CompressionLoader.Keys));
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return 100;
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}
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var m_Options = new Options(options);
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using (var backend = Library.DynamicLoader.BackendLoader.GetBackend(args[2], options))
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{
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if (backend == null)
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{
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Console.WriteLine("Backend not found: {0}{1}Backends supported: {2}", args[2], Environment.NewLine, string.Join(", ", Library.DynamicLoader.BackendLoader.Keys));
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return 100;
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}
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var targetfolder = Path.GetFullPath(args[3]);
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if (!Directory.Exists(args[3]))
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{
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Console.WriteLine("Creating target folder: {0}", targetfolder);
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Directory.CreateDirectory(targetfolder);
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}
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Console.WriteLine("Listing files on backend: {0} ...", backend.ProtocolKey);
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var rawlist = backend.List().ToList();
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Console.WriteLine("Found {0} files at remote storage", rawlist.Count);
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var i = 0;
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var downloaded = 0;
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var errors = 0;
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var needspass = 0;
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var remotefiles =
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(from x in rawlist
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let n = VolumeBase.ParseFilename(x)
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where n != null && n.Prefix == m_Options.Prefix
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select n).ToArray(); //ToArray() ensures that we do not remote-request it multiple times
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if (remotefiles.Length == 0)
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{
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if (rawlist.Count == 0)
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Console.WriteLine("No files were found at the remote location, perhaps the target url is incorrect?");
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else
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{
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var tmp =
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(from x in rawlist
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let n = VolumeBase.ParseFilename(x)
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where
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n != null
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select n.Prefix).ToArray();
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var types = tmp.Distinct().ToArray();
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if (tmp.Length == 0)
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Console.WriteLine("Found {0} files at the remote storage, but none that could be parsed", rawlist.Count);
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else if (types.Length == 1)
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Console.WriteLine("Found {0} parse-able files with the prefix {1}, did you forget to set the backup prefix?", tmp.Length, types[0]);
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else
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Console.WriteLine("Found {0} parse-able files (of {1} files) with different prefixes: {2}, did you forget to set the backup prefix?", tmp.Length, rawlist.Count, string.Join(", ", types));
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}
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return 100;
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}
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bool reencrypt = Library.Utility.Utility.ParseBoolOption(options, "reencrypt");
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bool reupload = Library.Utility.Utility.ParseBoolOption(options, "reupload");
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// Needs order (Files or Blocks) and Indexes as last because indexes content will be adjusted based on recompressed blocks
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var files = remotefiles.Where(a => a.FileType == RemoteVolumeType.Files).ToArray();
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var blocks = remotefiles.Where(a => a.FileType == RemoteVolumeType.Blocks).ToArray();
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var indexes = remotefiles.Where(a => a.FileType == RemoteVolumeType.Index).ToArray();
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remotefiles = files.Concat(blocks).ToArray().Concat(indexes).ToArray();
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Console.WriteLine("Found {0} files which belongs to backup with prefix {1}", remotefiles.Count(), m_Options.Prefix);
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foreach (var remoteFile in remotefiles)
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{
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try
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{
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Console.Write("{0}/{1}: {2}", ++i, remotefiles.Count(), remoteFile.File.Name);
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var localFileSource = Path.Combine(targetfolder, remoteFile.File.Name);
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string localFileTarget;
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string localFileSourceEncryption = "";
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if (remoteFile.EncryptionModule != null)
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{
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if (string.IsNullOrWhiteSpace(m_Options.Passphrase))
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{
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needspass++;
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Console.WriteLine(" - No passphrase supplied, skipping");
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continue;
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}
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using (var m = Library.DynamicLoader.EncryptionLoader.GetModule(remoteFile.EncryptionModule, m_Options.Passphrase, options))
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localFileSourceEncryption = m.FilenameExtension;
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localFileSource = localFileSource.Substring(0, localFileSource.Length - localFileSourceEncryption.Length - 1);
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}
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if (remoteFile.CompressionModule != null)
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localFileTarget = localFileSource.Substring(0, localFileSource.Length - remoteFile.CompressionModule.Length - 1) + "." + target_compr_module;
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else
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{
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Console.WriteLine(" - cannot detect compression type");
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continue;
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}
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if ((!reencrypt && File.Exists(localFileTarget)) || (reencrypt && File.Exists(localFileTarget + "." + localFileSourceEncryption)))
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{
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Console.WriteLine(" - target file already exist");
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continue;
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}
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if (File.Exists(localFileSource))
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File.Delete(localFileSource);
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Console.Write(" - downloading ({0})...", Library.Utility.Utility.FormatSizeString(remoteFile.File.Size));
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DateTime originLastWriteTime;
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FileInfo destinationFileInfo;
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using (var tf = new TempFile())
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{
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backend.Get(remoteFile.File.Name, tf);
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originLastWriteTime = new FileInfo(tf).LastWriteTime;
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downloaded++;
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if (remoteFile.EncryptionModule != null)
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{
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Console.Write(" decrypting ...");
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using (var m = Library.DynamicLoader.EncryptionLoader.GetModule(remoteFile.EncryptionModule, m_Options.Passphrase, options))
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using (var tf2 = new TempFile())
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{
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m.Decrypt(tf, tf2);
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File.Copy(tf2, localFileSource);
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File.Delete(tf2);
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}
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}
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else
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File.Copy(tf, localFileSource);
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File.Delete(tf);
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destinationFileInfo = new FileInfo(localFileSource);
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destinationFileInfo.LastWriteTime = originLastWriteTime;
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}
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if (remoteFile.CompressionModule != null)
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{
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Console.Write(" recompressing ...");
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//Recompressing from eg. zip to zip
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if (localFileSource == localFileTarget)
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{
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File.Move(localFileSource, localFileSource + ".same");
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localFileSource = localFileSource + ".same";
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}
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using (var cmOld = Library.DynamicLoader.CompressionLoader.GetModule(remoteFile.CompressionModule, localFileSource, options))
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using (var cmNew = Library.DynamicLoader.CompressionLoader.GetModule(target_compr_module, localFileTarget, options))
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foreach (var cmfile in cmOld.ListFiles(""))
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{
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string cmfileNew = cmfile;
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var cmFileVolume = VolumeBase.ParseFilename(cmfileNew);
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if (remoteFile.FileType == RemoteVolumeType.Index && cmFileVolume != null && cmFileVolume.FileType == RemoteVolumeType.Blocks)
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{
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// Correct inner filename extension to target compression type
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cmfileNew = cmfileNew.Replace("." + cmFileVolume.CompressionModule, "." + target_compr_module);
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if (!reencrypt)
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cmfileNew = cmfileNew.Replace("." + cmFileVolume.EncryptionModule, "");
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//Because compression changes blocks file sizes - needs to be updated
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string textJSON;
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using (var sourceStream = cmOld.OpenRead(cmfile))
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using (var sourceStreamReader = new StreamReader(sourceStream))
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{
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textJSON = sourceStreamReader.ReadToEnd();
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JToken token = JObject.Parse(textJSON);
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var fileInfoBlocks = new FileInfo(Path.Combine(targetfolder, cmfileNew.Replace("vol/", "")));
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var filehasher = HashAlgorithmHelper.Create(m_Options.FileHashAlgorithm);
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using (var fileStream = fileInfoBlocks.Open(FileMode.Open))
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{
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fileStream.Position = 0;
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token["volumehash"] = Convert.ToBase64String(filehasher.ComputeHash(fileStream));
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fileStream.Close();
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}
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token["volumesize"] = fileInfoBlocks.Length;
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textJSON = token.ToString();
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}
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using (var sourceStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(textJSON)))
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using (var cs = cmNew.CreateFile(cmfileNew, Library.Interface.CompressionHint.Compressible, cmOld.GetLastWriteTime(cmfile)))
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Library.Utility.Utility.CopyStream(sourceStream, cs);
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}
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else
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{
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using (var sourceStream = cmOld.OpenRead(cmfile))
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using (var cs = cmNew.CreateFile(cmfileNew, Library.Interface.CompressionHint.Compressible, cmOld.GetLastWriteTime(cmfile)))
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Library.Utility.Utility.CopyStream(sourceStream, cs);
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}
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}
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File.Delete(localFileSource);
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destinationFileInfo = new FileInfo(localFileTarget);
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destinationFileInfo.LastWriteTime = originLastWriteTime;
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}
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if (reencrypt && remoteFile.EncryptionModule != null)
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{
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Console.Write(" reencrypting ...");
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using (var m = Library.DynamicLoader.EncryptionLoader.GetModule(remoteFile.EncryptionModule, m_Options.Passphrase, options))
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{
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m.Encrypt(localFileTarget, localFileTarget + "." + localFileSourceEncryption);
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File.Delete(localFileTarget);
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localFileTarget = localFileTarget + "." + localFileSourceEncryption;
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}
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destinationFileInfo = new FileInfo(localFileTarget);
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destinationFileInfo.LastWriteTime = originLastWriteTime;
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}
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if (reupload)
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{
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Console.Write(" reuploading ...");
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backend.Put((new FileInfo(localFileTarget)).Name, localFileTarget);
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backend.Delete(remoteFile.File.Name);
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File.Delete(localFileTarget);
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}
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Console.WriteLine(" done!");
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}
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catch (Exception ex)
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{
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Console.WriteLine(" error: {0}", ex.ToString());
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errors++;
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}
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}
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if (reupload)
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{
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var remoteverificationfileexist = rawlist.Any(x => x.Name == (m_Options.Prefix + "-verification.json"));
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if (remoteverificationfileexist)
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{
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Console.WriteLine("Found verification file {0} - deleting", m_Options.Prefix + "-verification.json");
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backend.Delete(m_Options.Prefix + "-verification.json");
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}
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}
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if (needspass > 0 && downloaded == 0)
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{
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Console.WriteLine("No files downloaded, try adding --passphrase to decrypt files");
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return 100;
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}
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Console.WriteLine("Download complete, of {0} remote files, {1} were downloaded with {2} errors", remotefiles.Count(), downloaded, errors);
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if (needspass > 0)
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Console.WriteLine("Additonally {0} remote files were skipped because of encryption, supply --passphrase to download those");
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if (errors > 0)
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{
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Console.WriteLine("There were errors during recompress of remote backend files!");
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return 200;
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}
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return 0;
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}
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}
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}
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}
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