internal PkZipFile(LocalFileHeader header, uint headerOffset, Memory <byte> file)
{
File = file;
LocalFileHeader = header;
LocalHeaderOffset = headerOffset;
}
public async Task ExtractAll(string path, CancellationToken token)
{
foreach (var fileHeader in _cdHeaders)
{
if (fileHeader.CompressedSize != fileHeader.UncompressedSize)
{
throw new ArgumentException("Unable to extract, file is compressed!");
}
_stream.Seek(fileHeader.LocalHeaderOffset + 516, SeekOrigin.Begin);
var locFileHeaderSpan = new byte[LocalFileHeader.StaticHeaderSize + fileHeader.FilenameLength];
await _stream.ReadAsync(locFileHeaderSpan, token);
var locFileHeader = new LocalFileHeader(locFileHeaderSpan);
var fileData = new byte[locFileHeader.UncompressedSize];
await _stream.ReadAsync(fileData, token);
var file = new PkZipFile(locFileHeader, fileHeader.LocalHeaderOffset, fileData);
var filename = file.Filename;
var filePath = Path.Combine(path, filename);
if (!Regex.Match(filename, @"^(?!.*\.$)(?!.*?\.\.)[a-zA-Z0-9_.\\\/-]+$").Success)
{
throw new ArgumentException($"Invalid Filename: { filename }");
}
Directory.CreateDirectory(Path.GetDirectoryName(filePath));
using (var stream = File.Create(filePath))
{
await stream.WriteAsync(file.File, token);
}
}
}
public PkZipFile(string filename, byte[] file)
{
File = file;
LocalFileHeader = new LocalFileHeader(filename, (uint)File.Length, Crc32);
}
