Kenneth Skovhede
ff6757877f
Update the SQL to also group on size (just in case). Renamed the normal read method to signal that it is unverified. Made the verified reader use enumeration state machine to avoid materializing the list. `var`-ified some of the test code.
74 lines
3.3 KiB
C#
74 lines
3.3 KiB
C#
// Copyright (C) 2024, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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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 ReadBlocklistUnverified(m_compression, Library.Utility.Utility.Base64PlainToBase64Url(hash), hashsize);
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}
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public Stream ReadBlocklistRaw(string hash)
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{
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return m_compression.OpenRead(Library.Utility.Utility.Base64PlainToBase64Url(hash));
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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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