Kenneth Skovhede
8c935a7344
With this interface it is possible to wrap the current support for snapshots and USN and simplify the enumeration. This makes a number of assumptions into fields such as `IsMetaEntry` and `IsRootEntry` that removes code that was checking for various properties. This first commit has support for VSS and USN as well as "naked" files, keeping feature parity. There is also an experimental support for loading a backend-as-a-source. The support for this is currently limited as the backends need to be extended to support a folder concept.
88 lines
3.1 KiB
C#
88 lines
3.1 KiB
C#
// Copyright (C) 2025, 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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#nullable enable
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Duplicati.Library.Utility;
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/// <summary>
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/// A stream that wraps a temporary file.
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/// The temporary file is automatically deleted when the stream is disposed.
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/// </summary>
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public class TempFileStream : StreamUtil.WrappingAsyncStream
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{
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/// <summary>
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/// The temporary file instance.
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/// </summary>
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private readonly TempFile tempFile;
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/// <summary>
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/// The stream for the temporary file.
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/// </summary>
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private readonly Stream stream;
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/// <summary>
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/// The path to the temporary file.
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/// </summary>
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public string Path => tempFile.Name;
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/// <summary>
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/// Creates a new TempFileStream instance.
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/// </summary>
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/// <param name="tempFile">The temporary file instance.</param>
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/// <param name="stream">The stream for the temporary file.</param>
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private TempFileStream(TempFile tempFile, Stream stream)
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: base(stream)
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{
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this.tempFile = tempFile;
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this.stream = stream;
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}
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/// <summary>
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/// Creates a new TempFileStream instance.
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/// </summary>
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/// <returns>The new TempFileStream instance.</returns>
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public static TempFileStream Create()
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{
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var tempFile = new TempFile();
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return new TempFileStream(tempFile, File.Open(tempFile.Name, FileMode.Open, FileAccess.ReadWrite, FileShare.None));
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}
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/// <inheritdoc/>
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protected override Task<int> ReadImplAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
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=> stream.ReadAsync(buffer, offset, count, cancellationToken);
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/// <inheritdoc/>
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protected override Task WriteImplAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
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=> stream.WriteAsync(buffer, offset, count, cancellationToken);
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/// <inheritdoc/>
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protected override void Dispose(bool disposing)
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{
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base.Dispose(disposing);
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stream.Dispose();
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tempFile.Dispose();
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}
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}
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