private static void DoCreateFromDirectory(string sourceDirectoryName, string destinationArchiveFileName,
CompressionLevel?compressionLevel, bool includeBaseDirectory, Encoding?entryNameEncoding)
{
// Rely on Path.GetFullPath for validation of sourceDirectoryName and destinationArchive
// Checking of compressionLevel is passed down to DeflateStream and the IDeflater implementation
// as it is a pluggable component that completely encapsulates the meaning of compressionLevel.
sourceDirectoryName = Path.GetFullPath(sourceDirectoryName);
destinationArchiveFileName = Path.GetFullPath(destinationArchiveFileName);
using (ZipArchive archive = Open(destinationArchiveFileName, ZipArchiveMode.Create, entryNameEncoding))
{
bool directoryIsEmpty = true;
//add files and directories
DirectoryInfo di = new DirectoryInfo(sourceDirectoryName);
string basePath = di.FullName;
if (includeBaseDirectory && di.Parent != null)
{
basePath = di.Parent.FullName;
}
foreach (FileSystemInfo file in di.EnumerateFileSystemInfos("*", SearchOption.AllDirectories))
{
directoryIsEmpty = false;
if (file is FileInfo)
{
// Create entry for file:
string entryName = ArchivingUtils.EntryFromPath(file.FullName.AsSpan(basePath.Length));
ZipFileExtensions.DoCreateEntryFromFile(archive, file.FullName, entryName, compressionLevel);
}
else
{
// Entry marking an empty dir:
if (file is DirectoryInfo possiblyEmpty && ArchivingUtils.IsDirEmpty(possiblyEmpty))
{
// FullName never returns a directory separator character on the end,
// but Zip archives require it to specify an explicit directory:
string entryName = ArchivingUtils.EntryFromPath(file.FullName.AsSpan(basePath.Length), appendPathSeparator: true);
archive.CreateEntry(entryName);
}
}
}
// If no entries create an empty root directory entry:
if (includeBaseDirectory && directoryIsEmpty)
{
archive.CreateEntry(ArchivingUtils.EntryFromPath(di.Name, appendPathSeparator: true));
}
}
}
// Constructs the entry name used for a filesystem entry when creating an archive.
private static string GetEntryNameForFileSystemInfo(FileSystemInfo file, int basePathLength, ref char[] entryNameBuffer)
{
int entryNameLength = file.FullName.Length - basePathLength;
Debug.Assert(entryNameLength > 0);
bool isDirectory = file.Attributes.HasFlag(FileAttributes.Directory);
return(ArchivingUtils.EntryFromPath(file.FullName, basePathLength, entryNameLength, ref entryNameBuffer, appendPathSeparator: isDirectory));
}
// /// <summary>
// /// Asynchronously extracts the contents of a tar file into the specified directory.
// /// </summary>
// /// <param name="sourceFileName">The path of the tar file to extract.</param>
// /// <param name="destinationDirectoryName">The path of the destination directory where the filesystem entries should be extracted.</param>
// /// <param name="overwriteFiles"><see langword="true"/> to overwrite files and directories in <paramref name="destinationDirectoryName"/>; <see langword="false"/> to avoid overwriting, and throw if any files or directories are found with existing names.</param>
// /// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None" />.</param>
// /// <returns>A task that represents the asynchronous extraction operation.</returns>
// /// <remarks><para>Files of type <see cref="TarEntryType.BlockDevice"/>, <see cref="TarEntryType.CharacterDevice"/> or <see cref="TarEntryType.Fifo"/> can only be extracted in Unix platforms.</para>
// /// <para>Elevation is required to extract a <see cref="TarEntryType.BlockDevice"/> or <see cref="TarEntryType.CharacterDevice"/> to disk.</para></remarks>
// /// <exception cref="UnauthorizedAccessException">Operation not permitted due to insufficient permissions.</exception>
// public static Task ExtractToDirectoryAsync(string sourceFileName, string destinationDirectoryName, bool overwriteFiles, CancellationToken cancellationToken = default)
// {
// throw new NotImplementedException();
// }
// Creates an archive from the contents of a directory.
// It assumes the sourceDirectoryName is a fully qualified path, and allows choosing if the archive stream should be left open or not.
private static void CreateFromDirectoryInternal(string sourceDirectoryName, Stream destination, bool includeBaseDirectory, bool leaveOpen)
{
Debug.Assert(!string.IsNullOrEmpty(sourceDirectoryName));
Debug.Assert(destination != null);
Debug.Assert(Path.IsPathFullyQualified(sourceDirectoryName));
Debug.Assert(destination.CanWrite);
using (TarWriter writer = new TarWriter(destination, TarEntryFormat.Pax, leaveOpen))
{
bool baseDirectoryIsEmpty = true;
DirectoryInfo di = new(sourceDirectoryName);
string basePath = di.FullName;
if (includeBaseDirectory && di.Parent != null)
{
basePath = di.Parent.FullName;
}
// Windows' MaxPath (260) is used as an arbitrary default capacity, as it is likely
// to be greater than the length of typical entry names from the file system, even
// on non-Windows platforms. The capacity will be increased, if needed.
const int DefaultCapacity = 260;
char[] entryNameBuffer = ArrayPool <char> .Shared.Rent(DefaultCapacity);
try
{
foreach (FileSystemInfo file in di.EnumerateFileSystemInfos("*", SearchOption.AllDirectories))
{
baseDirectoryIsEmpty = false;
int entryNameLength = file.FullName.Length - basePath.Length;
Debug.Assert(entryNameLength > 0);
bool isDirectory = file.Attributes.HasFlag(FileAttributes.Directory);
string entryName = ArchivingUtils.EntryFromPath(file.FullName, basePath.Length, entryNameLength, ref entryNameBuffer, appendPathSeparator: isDirectory);
writer.WriteEntry(file.FullName, entryName);
}
if (includeBaseDirectory && baseDirectoryIsEmpty)
{
string entryName = ArchivingUtils.EntryFromPath(di.Name, 0, di.Name.Length, ref entryNameBuffer, appendPathSeparator: true);
PaxTarEntry entry = new PaxTarEntry(TarEntryType.Directory, entryName);
writer.WriteEntry(entry);
}
}
finally
{
ArrayPool <char> .Shared.Return(entryNameBuffer);
}
}
}
/// <summary>
/// Creates a file on the file system with the entry?s contents and the specified name.
/// The last write time of the file is set to the entry?s last write time.
/// This method does allows overwriting of an existing file with the same name.
/// </summary>
///
/// <exception cref="UnauthorizedAccessException">The caller does not have the required permission.</exception>
/// <exception cref="ArgumentException">destinationFileName is a zero-length string, contains only whitespace,
/// or contains one or more invalid characters as defined by InvalidPathChars. -or- destinationFileName specifies a directory.</exception>
/// <exception cref="ArgumentNullException">destinationFileName is null.</exception>
/// <exception cref="PathTooLongException">The specified path, file name, or both exceed the system-defined maximum length.
/// For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters.</exception>
/// <exception cref="DirectoryNotFoundException">The path specified in destinationFileName is invalid
/// (for example, it is on an unmapped drive).</exception>
/// <exception cref="IOException">An I/O error has occurred.
/// -or- The entry is currently open for writing.
/// -or- The entry has been deleted from the archive.</exception>
/// <exception cref="NotSupportedException">destinationFileName is in an invalid format
/// -or- The ZipArchive that this entry belongs to was opened in a write-only mode.</exception>
/// <exception cref="InvalidDataException">The entry is missing from the archive or is corrupt and cannot be read
/// -or- The entry has been compressed using a compression method that is not supported.</exception>
/// <exception cref="ObjectDisposedException">The ZipArchive that this entry belongs to has been disposed.</exception>
/// <param name="source">The zip archive entry to extract a file from.</param>
/// <param name="destinationFileName">The name of the file that will hold the contents of the entry.
/// The path is permitted to specify relative or absolute path information.
/// Relative path information is interpreted as relative to the current working directory.</param>
/// <param name="overwrite">True to indicate overwrite.</param>
public static void ExtractToFile(this ZipArchiveEntry source, string destinationFileName, bool overwrite)
{
ArgumentNullException.ThrowIfNull(source);
ArgumentNullException.ThrowIfNull(destinationFileName);
// Rely on FileStream's ctor for further checking destinationFileName parameter
FileMode fMode = overwrite ? FileMode.Create : FileMode.CreateNew;
using (FileStream fs = new FileStream(destinationFileName, fMode, FileAccess.Write, FileShare.None, bufferSize: 0x1000, useAsync: false))
{
using (Stream es = source.Open())
es.CopyTo(fs);
ExtractExternalAttributes(fs, source);
}
ArchivingUtils.AttemptSetLastWriteTime(destinationFileName, source.LastWriteTime);
}
/// <summary>
/// Creates a file on the file system with the entry?s contents and the specified name.
/// The last write time of the file is set to the entry?s last write time.
/// This method does allows overwriting of an existing file with the same name.
/// </summary>
///
/// <exception cref="UnauthorizedAccessException">The caller does not have the required permission.</exception>
/// <exception cref="ArgumentException">destinationFileName is a zero-length string, contains only whitespace,
/// or contains one or more invalid characters as defined by InvalidPathChars. -or- destinationFileName specifies a directory.</exception>
/// <exception cref="ArgumentNullException">destinationFileName is null.</exception>
/// <exception cref="PathTooLongException">The specified path, file name, or both exceed the system-defined maximum length.
/// For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters.</exception>
/// <exception cref="DirectoryNotFoundException">The path specified in destinationFileName is invalid
/// (for example, it is on an unmapped drive).</exception>
/// <exception cref="IOException">An I/O error has occurred.
/// -or- The entry is currently open for writing.
/// -or- The entry has been deleted from the archive.</exception>
/// <exception cref="NotSupportedException">destinationFileName is in an invalid format
/// -or- The ZipArchive that this entry belongs to was opened in a write-only mode.</exception>
/// <exception cref="InvalidDataException">The entry is missing from the archive or is corrupt and cannot be read
/// -or- The entry has been compressed using a compression method that is not supported.</exception>
/// <exception cref="ObjectDisposedException">The ZipArchive that this entry belongs to has been disposed.</exception>
/// <param name="source">The zip archive entry to extract a file from.</param>
/// <param name="destinationFileName">The name of the file that will hold the contents of the entry.
/// The path is permitted to specify relative or absolute path information.
/// Relative path information is interpreted as relative to the current working directory.</param>
/// <param name="overwrite">True to indicate overwrite.</param>
public static void ExtractToFile(this ZipArchiveEntry source, string destinationFileName, bool overwrite)
{
ArgumentNullException.ThrowIfNull(source);
ArgumentNullException.ThrowIfNull(destinationFileName);
FileStreamOptions fileStreamOptions = new()
{
Access = FileAccess.Write,
Mode = overwrite ? FileMode.Create : FileMode.CreateNew,
Share = FileShare.None,
BufferSize = 0x1000
};
const UnixFileMode OwnershipPermissions =
UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute |
UnixFileMode.GroupRead | UnixFileMode.GroupWrite | UnixFileMode.GroupExecute |
UnixFileMode.OtherRead | UnixFileMode.OtherWrite | UnixFileMode.OtherExecute;
// Restore Unix permissions.
// For security, limit to ownership permissions, and respect umask (through UnixCreateMode).
// We don't apply UnixFileMode.None because .zip files created on Windows and .zip files created
// with previous versions of .NET don't include permissions.
UnixFileMode mode = (UnixFileMode)(source.ExternalAttributes >> 16) & OwnershipPermissions;
if (mode != UnixFileMode.None && !OperatingSystem.IsWindows())
{
fileStreamOptions.UnixCreateMode = mode;
}
using (FileStream fs = new FileStream(destinationFileName, fileStreamOptions))
{
using (Stream es = source.Open())
es.CopyTo(fs);
}
ArchivingUtils.AttemptSetLastWriteTime(destinationFileName, source.LastWriteTime);
}
// Constructs a PaxTarEntry for a base directory entry when creating an archive.
private static PaxTarEntry GetEntryForBaseDirectory(string name, ref char[] entryNameBuffer)
{
string entryName = ArchivingUtils.EntryFromPath(name, 0, name.Length, ref entryNameBuffer, appendPathSeparator: true);
return(new PaxTarEntry(TarEntryType.Directory, entryName));
}
private static void DoCreateFromDirectory(string sourceDirectoryName, string destinationArchiveFileName,
CompressionLevel?compressionLevel, bool includeBaseDirectory, Encoding?entryNameEncoding)
{
// Rely on Path.GetFullPath for validation of sourceDirectoryName and destinationArchive
// Checking of compressionLevel is passed down to DeflateStream and the IDeflater implementation
// as it is a pluggable component that completely encapsulates the meaning of compressionLevel.
sourceDirectoryName = Path.GetFullPath(sourceDirectoryName);
destinationArchiveFileName = Path.GetFullPath(destinationArchiveFileName);
using (ZipArchive archive = Open(destinationArchiveFileName, ZipArchiveMode.Create, entryNameEncoding))
{
bool directoryIsEmpty = true;
//add files and directories
DirectoryInfo di = new DirectoryInfo(sourceDirectoryName);
string basePath = di.FullName;
if (includeBaseDirectory && di.Parent != null)
{
basePath = di.Parent.FullName;
}
// Windows' MaxPath (260) is used as an arbitrary default capacity, as it is likely
// to be greater than the length of typical entry names from the file system, even
// on non-Windows platforms. The capacity will be increased, if needed.
const int DefaultCapacity = 260;
char[] entryNameBuffer = ArrayPool <char> .Shared.Rent(DefaultCapacity);
try
{
foreach (FileSystemInfo file in di.EnumerateFileSystemInfos("*", SearchOption.AllDirectories))
{
directoryIsEmpty = false;
int entryNameLength = file.FullName.Length - basePath.Length;
Debug.Assert(entryNameLength > 0);
if (file is FileInfo)
{
// Create entry for file:
string entryName = ArchivingUtils.EntryFromPath(file.FullName, basePath.Length, entryNameLength, ref entryNameBuffer);
ZipFileExtensions.DoCreateEntryFromFile(archive, file.FullName, entryName, compressionLevel);
}
else
{
// Entry marking an empty dir:
if (file is DirectoryInfo possiblyEmpty && ArchivingUtils.IsDirEmpty(possiblyEmpty))
{
// FullName never returns a directory separator character on the end,
// but Zip archives require it to specify an explicit directory:
string entryName = ArchivingUtils.EntryFromPath(file.FullName, basePath.Length, entryNameLength, ref entryNameBuffer, appendPathSeparator: true);
archive.CreateEntry(entryName);
}
}
} // foreach
// If no entries create an empty root directory entry:
if (includeBaseDirectory && directoryIsEmpty)
{
archive.CreateEntry(ArchivingUtils.EntryFromPath(di.Name, 0, di.Name.Length, ref entryNameBuffer, appendPathSeparator: true));
}
}
finally
{
ArrayPool <char> .Shared.Return(entryNameBuffer);
}
}
}
internal static void ExtractRelativeToDirectory(this ZipArchiveEntry source, string destinationDirectoryName, bool overwrite)
{
ArgumentNullException.ThrowIfNull(source);
ArgumentNullException.ThrowIfNull(destinationDirectoryName);
// Note that this will give us a good DirectoryInfo even if destinationDirectoryName exists:
DirectoryInfo di = Directory.CreateDirectory(destinationDirectoryName);
string destinationDirectoryFullPath = di.FullName;
if (!destinationDirectoryFullPath.EndsWith(Path.DirectorySeparatorChar))
{
destinationDirectoryFullPath += Path.DirectorySeparatorChar;
}
string fileDestinationPath = Path.GetFullPath(Path.Combine(destinationDirectoryFullPath, ArchivingUtils.SanitizeEntryFilePath(source.FullName)));
if (!fileDestinationPath.StartsWith(destinationDirectoryFullPath, PathInternal.StringComparison))
{
throw new IOException(SR.IO_ExtractingResultsInOutside);
}
if (Path.GetFileName(fileDestinationPath).Length == 0)
{
// If it is a directory:
if (source.Length != 0)
{
throw new IOException(SR.IO_DirectoryNameWithData);
}
Directory.CreateDirectory(fileDestinationPath);
}
else
{
// If it is a file:
// Create containing directory:
Directory.CreateDirectory(Path.GetDirectoryName(fileDestinationPath) !);
source.ExtractToFile(fileDestinationPath, overwrite: overwrite);
}
}
