| | | 1 | | // The MIT License (MIT) |
| | | 2 | | // |
| | | 3 | | // Copyright (c) .NET Foundation and Contributors |
| | | 4 | | // |
| | | 5 | | // All rights reserved. |
| | | 6 | | // |
| | | 7 | | // Permission is hereby granted, free of charge, to any person obtaining a copy |
| | | 8 | | // of this software and associated documentation files (the "Software"), to deal |
| | | 9 | | // in the Software without restriction, including without limitation the rights |
| | | 10 | | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| | | 11 | | // copies of the Software, and to permit persons to whom the Software is |
| | | 12 | | // furnished to do so, subject to the following conditions: |
| | | 13 | | // |
| | | 14 | | // The above copyright notice and this permission notice shall be included in all |
| | | 15 | | // copies or substantial portions of the Software. |
| | | 16 | | // |
| | | 17 | | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| | | 18 | | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| | | 19 | | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| | | 20 | | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| | | 21 | | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| | | 22 | | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| | | 23 | | // SOFTWARE. |
| | | 24 | | |
| | | 25 | | using System; |
| | | 26 | | using System.IO; |
| | | 27 | | using System.Threading; |
| | | 28 | | using System.Threading.Tasks; |
| | | 29 | | using Microsoft.AspNetCore.Http; |
| | | 30 | | using Microsoft.AspNetCore.Http.Extensions; |
| | | 31 | | using Microsoft.AspNetCore.Mvc; |
| | | 32 | | using Microsoft.AspNetCore.Mvc.Infrastructure; |
| | | 33 | | using Microsoft.Extensions.Logging; |
| | | 34 | | using Microsoft.Net.Http.Headers; |
| | | 35 | | |
| | | 36 | | namespace Jellyfin.Server.Infrastructure |
| | | 37 | | { |
| | | 38 | | /// <inheritdoc /> |
| | | 39 | | public class SymlinkFollowingPhysicalFileResultExecutor : PhysicalFileResultExecutor |
| | | 40 | | { |
| | | 41 | | /// <summary> |
| | | 42 | | /// Initializes a new instance of the <see cref="SymlinkFollowingPhysicalFileResultExecutor"/> class. |
| | | 43 | | /// </summary> |
| | | 44 | | /// <param name="loggerFactory">An instance of the <see cref="ILoggerFactory"/> interface.</param> |
| | 0 | 45 | | public SymlinkFollowingPhysicalFileResultExecutor(ILoggerFactory loggerFactory) : base(loggerFactory) |
| | | 46 | | { |
| | 0 | 47 | | } |
| | | 48 | | |
| | | 49 | | /// <inheritdoc /> |
| | | 50 | | protected override FileMetadata GetFileInfo(string path) |
| | | 51 | | { |
| | 0 | 52 | | var fileInfo = new FileInfo(path); |
| | 0 | 53 | | var length = fileInfo.Length; |
| | | 54 | | // This may or may not be fixed in .NET 6, but looks like it will not https://github.com/dotnet/aspnetcore/i |
| | 0 | 55 | | if ((fileInfo.Attributes & FileAttributes.ReparsePoint) == FileAttributes.ReparsePoint) |
| | | 56 | | { |
| | 0 | 57 | | using var fileHandle = File.OpenHandle(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite); |
| | 0 | 58 | | length = RandomAccess.GetLength(fileHandle); |
| | | 59 | | } |
| | | 60 | | |
| | 0 | 61 | | return new FileMetadata |
| | 0 | 62 | | { |
| | 0 | 63 | | Exists = fileInfo.Exists, |
| | 0 | 64 | | Length = length, |
| | 0 | 65 | | LastModified = fileInfo.LastWriteTimeUtc |
| | 0 | 66 | | }; |
| | | 67 | | } |
| | | 68 | | |
| | | 69 | | /// <inheritdoc /> |
| | | 70 | | protected override async Task WriteFileAsync(ActionContext context, PhysicalFileResult result, RangeItemHeaderVa |
| | | 71 | | { |
| | | 72 | | ArgumentNullException.ThrowIfNull(context); |
| | | 73 | | ArgumentNullException.ThrowIfNull(result); |
| | | 74 | | |
| | | 75 | | if (range is not null && rangeLength == 0) |
| | | 76 | | { |
| | | 77 | | return; |
| | | 78 | | } |
| | | 79 | | |
| | | 80 | | // It's a bit of wasted IO to perform this check again, but non-symlinks shouldn't use this code |
| | | 81 | | if (!IsSymLink(result.FileName)) |
| | | 82 | | { |
| | | 83 | | await base.WriteFileAsync(context, result, range, rangeLength).ConfigureAwait(false); |
| | | 84 | | return; |
| | | 85 | | } |
| | | 86 | | |
| | | 87 | | var response = context.HttpContext.Response; |
| | | 88 | | |
| | | 89 | | if (range is not null) |
| | | 90 | | { |
| | | 91 | | await SendFileAsync( |
| | | 92 | | result.FileName, |
| | | 93 | | response, |
| | | 94 | | offset: range.From ?? 0L, |
| | | 95 | | count: rangeLength).ConfigureAwait(false); |
| | | 96 | | return; |
| | | 97 | | } |
| | | 98 | | |
| | | 99 | | await SendFileAsync( |
| | | 100 | | result.FileName, |
| | | 101 | | response, |
| | | 102 | | offset: 0, |
| | | 103 | | count: null).ConfigureAwait(false); |
| | | 104 | | } |
| | | 105 | | |
| | | 106 | | private async Task SendFileAsync(string filePath, HttpResponse response, long offset, long? count, CancellationT |
| | | 107 | | { |
| | | 108 | | var fileInfo = GetFileInfo(filePath); |
| | | 109 | | if (offset < 0 || offset > fileInfo.Length) |
| | | 110 | | { |
| | | 111 | | throw new ArgumentOutOfRangeException(nameof(offset), offset, string.Empty); |
| | | 112 | | } |
| | | 113 | | |
| | | 114 | | if (count.HasValue |
| | | 115 | | && (count.Value < 0 || count.Value > fileInfo.Length - offset)) |
| | | 116 | | { |
| | | 117 | | throw new ArgumentOutOfRangeException(nameof(count), count, string.Empty); |
| | | 118 | | } |
| | | 119 | | |
| | | 120 | | // Copied from SendFileFallback.SendFileAsync |
| | | 121 | | const int BufferSize = 1024 * 16; |
| | | 122 | | |
| | | 123 | | var useRequestAborted = !cancellationToken.CanBeCanceled; |
| | | 124 | | var localCancel = useRequestAborted ? response.HttpContext.RequestAborted : cancellationToken; |
| | | 125 | | |
| | | 126 | | var fileStream = new FileStream( |
| | | 127 | | filePath, |
| | | 128 | | FileMode.Open, |
| | | 129 | | FileAccess.Read, |
| | | 130 | | FileShare.ReadWrite, |
| | | 131 | | bufferSize: BufferSize, |
| | | 132 | | options: FileOptions.Asynchronous | FileOptions.SequentialScan); |
| | | 133 | | await using (fileStream.ConfigureAwait(false)) |
| | | 134 | | { |
| | | 135 | | try |
| | | 136 | | { |
| | | 137 | | localCancel.ThrowIfCancellationRequested(); |
| | | 138 | | fileStream.Seek(offset, SeekOrigin.Begin); |
| | | 139 | | await StreamCopyOperation |
| | | 140 | | .CopyToAsync(fileStream, response.Body, count, BufferSize, localCancel) |
| | | 141 | | .ConfigureAwait(true); |
| | | 142 | | } |
| | | 143 | | catch (OperationCanceledException) when (useRequestAborted) |
| | | 144 | | { |
| | | 145 | | } |
| | | 146 | | } |
| | | 147 | | } |
| | | 148 | | |
| | 0 | 149 | | private static bool IsSymLink(string path) => (File.GetAttributes(path) & FileAttributes.ReparsePoint) == FileAt |
| | | 150 | | } |
| | | 151 | | } |