49 lines
2.0 KiB
C#
49 lines
2.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Duplicati.Library.Interface;
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using System.IO;
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namespace Duplicati.Library.Main.Volumes
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{
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public class BlockVolumeReader : VolumeReaderBase
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{
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public BlockVolumeReader(ICompression compression, Options options)
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: base(compression, options)
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{
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}
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public BlockVolumeReader(string compressor, string file, Options options)
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: base(compressor, file, options)
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{
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}
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public int ReadBlock(string hash, byte[] blockbuffer)
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{
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using (var fs = m_compression.OpenRead(Library.Utility.Utility.Base64PlainToBase64Url(hash)))
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return Library.Utility.Utility.ForceStreamRead(fs, blockbuffer, blockbuffer.Length);
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}
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public IEnumerable<string> ReadBlocklist(string hash, long hashsize)
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{
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return new BlocklistEnumerable(m_compression, Library.Utility.Utility.Base64PlainToBase64Url(hash), hashsize);
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}
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//Filenames are encoded with "modified Base64 for URL" https://en.wikipedia.org/wiki/Base64#URL_applications,
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// to prevent clashes with filename paths where forward slash has special meaning
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private readonly System.Text.RegularExpressions.Regex m_base64_urlsafe_detector = new System.Text.RegularExpressions.Regex("[a-zA-Z0-9-_]+={0,2}");
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public IEnumerable<KeyValuePair<string, long>> Blocks
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{
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get
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{
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return
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from n in m_compression.ListFilesWithSize(null)
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let valid = m_base64_urlsafe_detector.Match(n.Key)
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where valid.Success && valid.Length == n.Key.Length && n.Key.Length % 4 == 0 && n.Key != MANIFEST_FILENAME
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select new KeyValuePair<string, long>(Library.Utility.Utility.Base64UrlToBase64Plain(n.Key), n.Value);
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}
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}
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}
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}
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