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- using System.IO.Compression;
- namespace MeloongCore;
- public static class FileUtils {
- #region 读取
- /// <summary>
- /// 打开指定文件的只读 <see cref="Stream"/>。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static Stream ReadAsStream(string filePath, Type? type = null) {
- if (type is null) {
- return Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, func: _
- => new FileStream(PathUtils.ForApi(filePath), FileMode.Open, FileAccess.Read, FileShare.ReadWrite));
- } else {
- return type.Assembly.GetManifestResourceStream(filePath) ?? throw new FileNotFoundException($"Embedded resource \"{filePath}\" was not found.");
- }
- }
- /// <summary>
- /// 读取文件中的所有内容。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static byte[] ReadAsBytes(string filePath, Type? type = null) {
- using Stream fs = FileUtils.ReadAsStream(filePath, type); // 不能使用 File.ReadAllBytes,它不指定 FileShare.ReadWrite,会在文件被占用时抛出异常
- using MemoryStream ms = new();
- fs.CopyTo(ms);
- return ms.ToArray();
- }
- /// <summary>
- /// 读取文件中的所有内容。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static string ReadAsString(string filePath, Encoding? encoding = null, Type? type = null)
- => FileUtils.ReadAsBytes(filePath, type).GetString(encoding);
- /// <summary>
- /// 读取文件中的所有内容。
- /// <para/>若文件不存在或读取失败,返回 <see langword="null"/>,而不是抛出异常。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static string? TryReadAsString(string filePath, Encoding? encoding = null, Type? type = null) {
- try {
- if (type == null && !FileUtils.Exists(filePath)) return null;
- return FileUtils.ReadAsBytes(filePath, type).GetString(encoding);
- } catch {
- return null;
- }
- }
- /// <summary>
- /// 读取文件中的所有内容,并按行分割。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static string[] ReadAsLines(string filePath, bool skipEmptyLines = false, Encoding? encoding = null, Type? type = null)
- => FileUtils.ReadAsString(filePath, encoding, type).SplitLines(skipEmptyLines);
- /// <summary>
- /// 读取文件中的所有内容,并按行分割。
- /// <para/>若文件不存在或读取失败,返回空数组,而不是抛出异常。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static string[] TryReadAsLines(string filePath, bool skipEmptyLines = false, Encoding? encoding = null, Type? type = null)
- => FileUtils.TryReadAsString(filePath, encoding, type)?.SplitLines(skipEmptyLines) ?? [];
- /// <summary>
- /// 读取 JSON 文件中的所有内容。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static JToken? ReadAsJson(string filePath, Encoding? encoding = null, Type? type = null)
- => FileUtils.ReadAsString(filePath, encoding, type).DeserializeJson();
- /// <summary>
- /// 读取 JSON 文件中的所有内容。
- /// <para/>若指定了 <paramref name="type"/>,则会改为从该类型的程序集中读取嵌入的资源。
- /// </summary>
- public static T? ReadAsJson<T>(string filePath, Encoding? encoding = null, Type? type = null) where T : JToken
- => FileUtils.ReadAsString(filePath, encoding, type).DeserializeJson<T>();
- #endregion
- #region 创建 / 写入
- /// <summary>
- /// 创建文件,并将 <paramref name="text" /> 写入文件。
- /// 若文件已存在,则会覆盖原文件。
- /// </summary>
- public static void Write(string filePath, string text, Encoding? encoding = null)
- => FileUtils.Write(filePath, (encoding ?? new UTF8Encoding()).GetBytes(text));
- /// <summary>
- /// 创建文件,并将 <paramref name="content" /> 写入文件。
- /// 若文件已存在,则会覆盖原文件。
- /// </summary>
- public static void Write(string filePath, IEnumerable<byte> content)
- => FileUtils.Write(filePath, [.. content]);
- /// <summary>
- /// 创建文件,并将 <paramref name="content" /> 写入文件。
- /// 若文件已存在,则会覆盖原文件。
- /// </summary>
- public static void Write(string filePath, byte[] content) {
- DirectoryUtils.Create(PathUtils.RemoveLastPart(filePath));
- Logger.Trace($"写入文件:{filePath}({content.Length} 字节)");
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _ => {
- File.WriteAllBytes(PathUtils.ForApi(filePath), content);
- });
- }
- /// <summary>
- /// 原子写入文件。成功时目标文件完整切换为新内容,失败时已有目标文件保持不变。
- /// 不提供并发写入合并保证。
- /// </summary>
- public static void WriteAtomic(string filePath, string text, Encoding? encoding = null) =>
- FileUtils.WriteAtomic(filePath, (encoding ?? new UTF8Encoding()).GetBytes(text));
- /// <summary>
- /// 原子写入文件。成功时目标文件完整切换为新内容,失败时已有目标文件保持不变。
- /// 不提供并发写入合并保证。
- /// </summary>
- public static void WriteAtomic(string filePath, byte[] content) {
- string tempPath = $"{filePath}.{Guid.NewGuid():N}.tmp";
- try {
- FileUtils.Write(tempPath, content);
- if (FileUtils.Exists(filePath)) {
- File.Replace(PathUtils.ForApi(tempPath), PathUtils.ForApi(filePath), null, true);
- } else {
- File.Move(PathUtils.ForApi(tempPath), PathUtils.ForApi(filePath));
- }
- } finally {
- FileUtils.Delete(tempPath);
- }
- }
- /// <summary>
- /// 创建文件,并将 <paramref name="stream" /> 写入文件。
- /// 会将流的位置主动重置到开头。
- /// 若文件已存在,则会覆盖原文件。
- /// </summary>
- public static void Write(string filePath, Stream stream) {
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _ => {
- FileUtils.Delete(filePath);
- using FileStream fileStream = FileUtils.CreateAsStream(filePath);
- if (stream.CanSeek && stream.Position != 0) stream.Seek(0, SeekOrigin.Begin);
- Logger.Trace($"写入文件:{filePath}({stream.GetType().Name}{(stream.CanSeek ? $" {stream.Length} 字节" : "")})");
- stream.CopyTo(fileStream);
- });
- }
- /// <summary>
- /// 创建文件,并打开 <see cref="FileMode.Create"/> 模式的 <see cref="FileStream"/>。
- /// 若文件已存在,则会覆盖原文件。
- /// </summary>
- public static FileStream CreateAsStream(string filePath) {
- DirectoryUtils.Create(PathUtils.RemoveLastPart(filePath));
- Logger.Trace($"创建文件流:{filePath}");
- return Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, func: _ => {
- FileUtils.Delete(filePath);
- return new FileStream(PathUtils.ForApi(filePath), FileMode.Create);
- });
- }
- /// <summary>
- /// 在临时文件夹下创建一个随机名称的文件,并返回其路径。
- /// </summary>
- public static string CreateRandom()
- => Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, func: _
- => Path.GetTempFileName());
- /// <summary>
- /// 从 <paramref name="type"/> 的程序集中,读取指定 <paramref name="logicalName"/> 的嵌入的资源,写入到 <paramref name="localFilePath"/> 中。
- /// <para/> 如果文件已存在且内容相同,则不会写入。
- /// </summary>
- public static void ExtractResources(string logicalName, string localFilePath, Type type) {
- var content = ReadAsBytes(logicalName, type);
- if (Exists(localFilePath) && CryptographyUtils.ComputeFileHash(localFilePath) == CryptographyUtils.ComputeHash(content)) return;
- Logger.Info($"将资源写入到文件:{logicalName} → {localFilePath}");
- Write(localFilePath, content);
- }
- #endregion
- #region 复制 / 剪切
- /// <summary>
- /// 复制文件。
- /// 会创建对应文件夹、覆盖已有的文件。
- /// 若复制自身到自身,则不执行操作;若仅大小写不同,则重命名此文件。
- /// </summary>
- public static void Copy(string sourceFilePath, string destFilePath) {
- sourceFilePath = PathUtils.ForCompare(sourceFilePath);
- destFilePath = PathUtils.ForCompare(destFilePath);
- if (string.CompareOrdinal(sourceFilePath, destFilePath) == 0) {
- // 复制自身到自身,则不执行操作
- Logger.Trace($"复制文件到自身,不执行操作:{sourceFilePath} → {destFilePath}");
- } else if (PathUtils.IsSame(sourceFilePath, destFilePath)) {
- // 路径仅大小写不同,等效于重命名
- Logger.Trace($"复制文件到自身,但大小写不同,等效于重命名文件:{sourceFilePath} → {destFilePath}");
- FileUtils.Move(sourceFilePath, destFilePath);
- } else {
- // 实际的复制
- DirectoryUtils.Create(PathUtils.RemoveLastPart(destFilePath));
- Logger.Trace($"复制文件:{sourceFilePath} → {destFilePath}");
- if (FileUtils.Exists(destFilePath)) FileUtils.SetReadOnly(destFilePath, false);
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _
- => File.Copy(PathUtils.ForApi(sourceFilePath), PathUtils.ForApi(destFilePath), true));
- }
- }
- /// <summary>
- /// 剪切文件。
- /// 会创建对应文件夹、覆盖已有的文件。
- /// 若指定了 <paramref name="toRecycleBin"/>,则在覆盖前将老文件删除到回收站。
- /// </summary>
- public static void Move(string sourceFilePath, string destFilePath, bool toRecycleBin = false) {
- sourceFilePath = PathUtils.ForCompare(sourceFilePath);
- destFilePath = PathUtils.ForCompare(destFilePath);
- if (string.CompareOrdinal(sourceFilePath, destFilePath) == 0) {
- // 剪切自身到自身,则不执行操作
- Logger.Trace($"剪切文件到自身,不执行操作:{sourceFilePath} → {destFilePath}");
- } else if (PathUtils.IsSame(sourceFilePath, destFilePath)) {
- // 路径仅大小写不同
- Logger.Trace($"剪切文件到自身,但大小写不同:{sourceFilePath} → {destFilePath}");
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _ => {
- var temp = Path.Combine(PathUtils.RemoveLastPart(sourceFilePath), Path.GetRandomFileName());
- FileUtils.SetReadOnly(sourceFilePath, false);
- if (FileUtils.Exists(destFilePath)) FileUtils.SetReadOnly(destFilePath, false);
- File.Move(PathUtils.ForApi(sourceFilePath), PathUtils.ForApi(temp));
- File.Move(PathUtils.ForApi(temp), PathUtils.ForApi(destFilePath));
- });
- } else {
- // 实际的剪切
- DirectoryUtils.Create(PathUtils.RemoveLastPart(destFilePath));
- FileUtils.Delete(destFilePath, toRecycleBin);
- Logger.Trace($"剪切文件:{sourceFilePath} → {destFilePath}");
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _ => {
- FileUtils.SetReadOnly(sourceFilePath, false);
- if (FileUtils.Exists(destFilePath)) FileUtils.SetReadOnly(destFilePath, false);
- File.Move(PathUtils.ForApi(sourceFilePath), PathUtils.ForApi(destFilePath));
- });
- }
- }
- #endregion
- #region 删除
- /// <summary>
- /// 删除文件。
- /// <para/>若指定了 <paramref name="toRecycleBin"/>,则会尝试删除到回收站,但如果失败则会回退到永久删除。
- /// </summary>
- /// <returns>
- /// 如果文件不存在,返回 <see langword="null"/>。
- /// <para/>如果成功删除到回收站,返回 <see langword="true"/>。
- /// <para/>如果永久删除,返回 <see langword="false"/>。
- /// </returns>
- public static bool? Delete(string filePath, bool toRecycleBin = false) {
- if (!FileUtils.Exists(filePath)) return null;
- Logger.Trace($"{(toRecycleBin ? "将文件删除到回收站" : "删除文件")}:{filePath}");
- // 删除到回收站
- if (toRecycleBin) {
- try {
- DeleteToRecycleBin(filePath);
- return true;
- } catch (Exception ex) {
- Logger.Warn(ex, $"无法将文件删除到回收站,回退到永久删除:{filePath}");
- }
- }
- // 永久删除
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _ => {
- FileUtils.SetReadOnly(filePath, false);
- File.Delete(PathUtils.ForApi(filePath));
- });
- return false;
- }
- /// <summary>
- /// 将文件或文件夹删除到回收站。
- /// </summary>
- internal static void DeleteToRecycleBin(string target) {
- // 实际的删除方法
- void Run() {
- IShellItem? item = null;
- IFileOperation? op = null;
- try {
- var iid = typeof(IShellItem).GUID;
- Marshal.ThrowExceptionForHR(SHCreateItemFromParsingName(PathUtils.RemoveExtendedPrefix(target), IntPtr.Zero, ref iid, out item));
- // ReSharper disable once SuspiciousTypeConversion.Global
- op = (IFileOperation) new FileOperation();
- op.SetOperationFlags(0x0040 | 0x0010 | 0x0004); // FOF_ALLOWUNDO | FOF_NOCONFIRMATION | FOF_SILENT
- op.DeleteItem(item, IntPtr.Zero);
- op.PerformOperations();
- op.GetAnyOperationsAborted(out bool aborted);
- if (aborted) throw new OperationCanceledException("Delete operation was aborted.");
- } finally {
- if (op != null && Marshal.IsComObject(op)) Marshal.FinalReleaseComObject(op);
- if (item != null && Marshal.IsComObject(item)) Marshal.FinalReleaseComObject(item);
- }
- }
- // 在 STA 线程中执行删除方法
- if (Thread.CurrentThread.GetApartmentState() == ApartmentState.STA) {
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _ => Run());
- } else {
- System.Runtime.ExceptionServices.ExceptionDispatchInfo? internalEx = null; // 捕获内部异常
- var thread = new Thread(() => {
- try {
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException or COMException, action: _ => Run());
- } catch (Exception ex) {
- internalEx = System.Runtime.ExceptionServices.ExceptionDispatchInfo.Capture(ex);
- }
- }) { IsBackground = true, Name = nameof(DeleteToRecycleBin) };
- thread.SetApartmentState(ApartmentState.STA);
- thread.Start();
- thread.Join();
- internalEx?.Throw();
- }
- }
- // API
- [DllImport("shell32.dll", CharSet = CharSet.Unicode)]
- static extern int SHCreateItemFromParsingName([MarshalAs(UnmanagedType.LPWStr)] string pszPath, IntPtr pbc, ref Guid riid, [MarshalAs(UnmanagedType.Interface)] out IShellItem ppv);
- [ComImport, Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
- interface IShellItem { }
- [ComImport, Guid("3AD05575-8857-4850-9277-11B85BDB8E09")]
- class FileOperation { }
- [ComImport, Guid("947AAB5F-0A5C-4C13-B4D6-4BF7836FC9F8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
- interface IFileOperation {
- void Advise(IntPtr pfops, out uint pdwCookie);
- void Unadvise(uint dwCookie);
- void SetOperationFlags(uint dwOperationFlags);
- void SetProgressMessage([MarshalAs(UnmanagedType.LPWStr)] string pszMessage);
- void SetProgressDialog(IntPtr popd);
- void SetProperties(IntPtr pproparray);
- void SetOwnerWindow(IntPtr hwndOwner);
- void ApplyPropertiesToItem(IShellItem psiItem);
- void ApplyPropertiesToItems(IntPtr punkItems);
- void RenameItem(IShellItem psiItem, [MarshalAs(UnmanagedType.LPWStr)] string pszNewName, IntPtr pfopsItem);
- void RenameItems(IntPtr pUnkItems, [MarshalAs(UnmanagedType.LPWStr)] string pszNewName);
- void MoveItem(IShellItem psiItem, IShellItem psiDestinationFolder, [MarshalAs(UnmanagedType.LPWStr)] string pszNewName, IntPtr pfopsItem);
- void MoveItems(IntPtr punkItems, IShellItem psiDestinationFolder);
- void CopyItem(IShellItem psiItem, IShellItem psiDestinationFolder, [MarshalAs(UnmanagedType.LPWStr)] string pszCopyName, IntPtr pfopsItem);
- void CopyItems(IntPtr punkItems, IShellItem psiDestinationFolder);
- void DeleteItem(IShellItem psiItem, IntPtr pfopsItem);
- void DeleteItems(IntPtr punkItems);
- void NewItem(IShellItem psiDestinationFolder, uint dwFileAttributes, [MarshalAs(UnmanagedType.LPWStr)] string pszName, [MarshalAs(UnmanagedType.LPWStr)] string pszTemplateName, IntPtr pfopsItem);
- void PerformOperations();
- void GetAnyOperationsAborted([MarshalAs(UnmanagedType.Bool)] out bool pfAnyOperationsAborted);
- }
- #endregion
- #region 压缩 / 解压
- /// <summary>
- /// 以只读模式打开压缩文件。
- /// 会先尝试 UTF8 编码,失败后换用 GB18030 编码。
- /// </summary>
- public static ZipArchive OpenZip(string zipFilePath, CancellationToken c = default) {
- ZipArchive TryOpen(Encoding encoding) {
- Logger.Trace($"尝试以 {encoding.EncodingName} 编码打开压缩包:{zipFilePath}");
- var result = ZipFile.Open(PathUtils.ForApi(zipFilePath), ZipArchiveMode.Read, encoding);
- try {
- _ = result.Entries; // 如果编码有误,会在这里抛出 DecoderFallbackException;如果文件异常,会在这里抛出 InvalidDataException
- return result;
- } catch {
- result.Dispose();
- throw;
- }
- }
- return Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), maxAttempts:10, isRetryAllowed: ex => ex is IOException, cancellationToken: c, func: _ => {
- try {
- try { // 尝试两种编码
- return TryOpen(new UTF8Encoding(false, true));
- } catch (DecoderFallbackException) {
- return TryOpen(Encoding.GetEncoding("GB18030"));
- }
- } catch (InvalidDataException ex) {
- throw new InvalidDataException($"文件不是压缩包,或者文件已损坏({zipFilePath})", ex);
- }
- });
-
- }
- /// <summary>
- /// 尝试根据后缀名判断文件种类并解压文件,支持 gz 与 zip,会尝试将 jar 以 zip 方式解压。
- /// 会自动创建文件夹。会覆盖已有文件,但不会删除多余文件。
- /// </summary>
- /// <param name="p">参数为已完成的总比例(0~1)。</param>
- public static void ExtractToDirectory(string compressionFile, string outputDirectory, CancellationToken c = default, ProgressProvider? p = null) {
- compressionFile = PathUtils.ForApi(compressionFile);
- DirectoryUtils.Create(outputDirectory);
- // 解压 gz(gz 不需要考虑编码)
- if (PathUtils.GetExtension(compressionFile) == "gz") {
- string outFilePath = Path.Combine(outputDirectory, PathUtils.GetFileNameWithoutExtension(compressionFile));
- Logger.Trace($"解压 gz 文件:{compressionFile} → {outFilePath}");
- using var fileStream = FileUtils.ReadAsStream(compressionFile);
- using var gzipStream = new GZipStream(fileStream, CompressionMode.Decompress);
- FileUtils.Write(outFilePath, gzipStream);
- p?.Finish();
- return;
- }
- // 解压 zip
- using var archive = FileUtils.OpenZip(compressionFile, c);
- var entries = archive.Entries.Where(e => !string.IsNullOrEmpty(e.Name)).ToList(); // 跳过文件夹条目(ZipArchive 会将文件夹也作为一个 entry,但它们的 Name 为空)
- int totalCount = entries.Count;
- int doneCount = 0;
- Logger.Trace($"解压 zip 文件:{compressionFile} → {outputDirectory}(共 {totalCount} 项)");
- foreach (var entry in entries) {
- c.ThrowIfCancellationRequested();
- doneCount++;
- if (totalCount > 0) p?.Set((double) doneCount / totalCount);
- // ZipSlip 修复
- string outputFilePath = Path.Combine(outputDirectory, entry.FullName);
- if (!PathUtils.IsParentOf(outputDirectory, outputFilePath))
- throw new InvalidDataException($"Zip 文件项 {entry.FullName} 的路径在压缩包之外,这可能导致安全问题");
- // 实际的解压
- using var entryStream = entry.Open();
- FileUtils.Write(outputFilePath, entryStream);
- }
- }
- /// <summary>
- /// 将指定文件夹的内容打包为 zip 文件。
- /// 会自动创建文件夹。会覆盖已有文件。
- /// </summary>
- public static void CreateZipFromDirectory(string outputFullPath, string sourceDirectory) {
- DirectoryUtils.Create(PathUtils.RemoveLastPart(outputFullPath));
- FileUtils.Delete(outputFullPath);
- Logger.Trace($"将文件夹中的内容压缩为 zip 文件:{sourceDirectory} → {outputFullPath}");
- Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _
- => ZipFile.CreateFromDirectory(PathUtils.ForApi(sourceDirectory), PathUtils.ForApi(outputFullPath)));
- }
- /// <summary>
- /// 将多个文件打包为 zip 文件,所有文件都会被放在压缩文件的根目录。
- /// 会自动创建文件夹。会覆盖已有文件。
- /// </summary>
- public static void CreateZipFromFiles(string outputFullPath, params string[] sourceFiles) {
- var sources = new Dictionary<string, string>();
- foreach (var source in sourceFiles) {
- string fileName = PathUtils.GetLastPart(source);
- if (sources.ContainsKey(fileName)) throw new ArgumentException($"尝试将多个同文件名的文件放进压缩包中({fileName})", nameof(sourceFiles));
- sources.Add(fileName, source);
- }
- FileUtils.CreateZipFromFiles(outputFullPath, sources);
- }
- /// <summary>
- /// 将多个文件打包为 zip 文件。
- /// 会自动创建文件夹。会覆盖已有文件。
- /// </summary>
- /// <param name="sources">键为 zip 文件下的路径,值为文件的本地路径。</param>
- public static void CreateZipFromFiles(string outputFullPath, IDictionary<string, string> sources) {
- DirectoryUtils.Create(PathUtils.RemoveLastPart(outputFullPath));
- FileUtils.Delete(outputFullPath);
- using var archive = Retrier.Attempt(delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, func: _
- => ZipFile.Open(PathUtils.ForApi(outputFullPath), ZipArchiveMode.Create));
- Logger.Trace($"创建 zip 文件:{sources.Count} 个文件 → {outputFullPath}\n{sources.Select(p => $"- {p.Value} → {p.Key}").Join('\n')}");
- foreach (var pair in sources) archive.CreateEntryFromFile(PathUtils.ForApi(pair.Value), pair.Key.Replace('\\', '/'), CompressionLevel.Optimal);
- }
- #endregion
- /// <summary>
- /// 确定指定的文件是否存在。
- /// </summary>
- public static bool Exists(string filePath)
- => File.Exists(PathUtils.ForApi(filePath));
- /// <summary>
- /// 检查文件是否未被其他进程占用
- /// <para>被占用或无权读取时返回 <see langword="false"/>。</para>
- /// </summary>
- public static bool IsAvailable(string filePath) {
- if (!Exists(filePath)) return true;
- try {
- Retrier.Attempt(maxAttempts: 3, delay: _ => TimeSpan.FromMilliseconds(200), isRetryAllowed: ex => ex is IOException, action: _ => {
- using var stream = new FileStream(PathUtils.ForApi(filePath), FileMode.Open, FileAccess.Read, FileShare.None);
- });
- return true;
- } catch (Exception ex) when (ex is IOException or UnauthorizedAccessException) {
- return false;
- }
- }
- /// <summary>
- /// 获取 <see cref="FileInfo"/> 对象。
- /// </summary>
- public static FileInfo GetInfo(string path)
- => new(PathUtils.ForApi(path));
- /// <summary>
- /// 设置文件或文件夹的只读属性。
- /// 对文件夹使用时,只会设置文件夹本身的属性,不会递归设置其中的文件或子文件夹。
- /// </summary>
- public static void SetReadOnly(string path, bool readOnly) {
- path = PathUtils.ForApi(path);
- var attributes = File.GetAttributes(path);
- var newAttributes = readOnly
- ? attributes | FileAttributes.ReadOnly
- : attributes & ~FileAttributes.ReadOnly;
- if (attributes == newAttributes) return;
- Logger.Trace($"{(readOnly ? "添加" : "移除")}只读属性:{path}(原属性:{attributes},新属性:{newAttributes})");
- File.SetAttributes(path, newAttributes);
- }
- }
- /// <summary>
- /// 检查文件是否符合校验规则,包括大小、Hash 值、是否为 JSON 文件。
- /// </summary>
- public class FileChecker {
- /// <summary>
- /// 文件的准确大小。
- /// <para/>不检查则为 -1。
- /// </summary>
- public long ActualSize = -1;
- /// <summary>
- /// 文件的最小大小。
- /// <para/>不检查则为 -1。
- /// </summary>
- public long MinSize = -1;
- /// <summary>
- /// 文件的 MD5、SHA1、SHA256 或 SHA512。会根据输入字符串的长度自动判断种类。
- /// <para/>不检查则为 <c>null</c>。
- /// </summary>
- public string? Hash = null;
- /// <summary>
- /// 是否要求为 JSON 文件。
- /// </summary>
- public bool IsJson = false;
-
- // TODO: 重构此函数,使它变成 void,并抛出异常
- /// <summary>
- /// 检查文件。
- /// <para/>若成功则返回 <c>null</c>,失败则返回错误的描述文本(文本不以句号结尾)。
- /// <para/>不会抛出异常。
- /// </summary>
- public string? Check(string localPath) {
- try {
- var info = FileUtils.GetInfo(localPath);
- if (!info.Exists) return "文件不存在:" + localPath;
- long fileSize = info.Length;
- if (ActualSize >= 0 && ActualSize != fileSize) {
- return $"文件大小应为 {ActualSize} B,实际为 {fileSize} B" +
- (fileSize < 2000 ? ",内容为:" + FileUtils.ReadAsString(localPath) : "");
- }
- if (MinSize >= 0 && MinSize > fileSize) {
- return $"文件大小应至少为 {MinSize} B,实际为 {fileSize} B" +
- (fileSize < 2000 ? ",内容为:" + FileUtils.ReadAsString(localPath) : "");
- }
- string? hash = Hash;
- if (!string.IsNullOrEmpty(hash)) {
- hash = hash!.Lower();
- switch (hash.Length) {
- case 32:
- string md5 = CryptographyUtils.ComputeFileHash(localPath, CryptographyUtils.HashMethod.Md5);
- if (hash != md5) return "文件 MD5 应为 " + hash + ",实际为 " + md5;
- break;
- case 40:
- string sha1 = CryptographyUtils.ComputeFileHash(localPath, CryptographyUtils.HashMethod.Sha1);
- if (hash != sha1) return "文件 SHA1 应为 " + hash + ",实际为 " + sha1;
- break;
- case 64:
- string sha256 = CryptographyUtils.ComputeFileHash(localPath, CryptographyUtils.HashMethod.Sha256);
- if (hash != sha256) return "文件 SHA256 应为 " + hash + ",实际为 " + sha256;
- break;
- case 128:
- string sha512 = CryptographyUtils.ComputeFileHash(localPath, CryptographyUtils.HashMethod.Sha512);
- if (hash != sha512) return "文件 SHA512 应为 " + hash + ",实际为 " + sha512;
- break;
- default:
- return $"无法识别的 Hash 类型(长度为 {hash.Length}):{hash}";
- }
- }
- if (IsJson) {
- string content = FileUtils.ReadAsString(localPath);
- if (content == "") return "读取到的文件为空";
- content.DeserializeJson();
- }
- return null;
- } catch (Exception ex) {
- Logger.Warn(ex, "检查文件出错");
- return ex.GetDisplay(false);
- }
- }
- }
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