internal AbstractReader(ReaderOptions options, ArchiveType archiveType)
{
ArchiveType = archiveType;
Options = options;
}
/// <summary>
/// Opens a Reader for Non-seeking usage
/// </summary>
/// <param name="stream"></param>
/// <param name="options"></param>
/// <returns></returns>
public static IReader Open(Stream stream, ReaderOptions options = null)
{
stream.CheckNotNull("stream");
options = options ?? new ReaderOptions()
{
LeaveStreamOpen = false
};
RewindableStream rewindableStream = new RewindableStream(stream);
rewindableStream.StartRecording();
if (ZipArchive.IsZipFile(rewindableStream, options.Password))
{
rewindableStream.Rewind(true);
return(ZipReader.Open(rewindableStream, options));
}
rewindableStream.Rewind(false);
if (GZipArchive.IsGZipFile(rewindableStream))
{
rewindableStream.Rewind(false);
GZipStream testStream = new GZipStream(rewindableStream, CompressionMode.Decompress);
if (TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
return(new TarReader(rewindableStream, options, CompressionType.GZip));
}
rewindableStream.Rewind(true);
return(GZipReader.Open(rewindableStream, options));
}
rewindableStream.Rewind(false);
if (BZip2Stream.IsBZip2(rewindableStream))
{
rewindableStream.Rewind(false);
BZip2Stream testStream = new BZip2Stream(rewindableStream, CompressionMode.Decompress, true);
if (TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
return(new TarReader(rewindableStream, options, CompressionType.BZip2));
}
}
rewindableStream.Rewind(false);
if (LZipStream.IsLZipFile(rewindableStream))
{
rewindableStream.Rewind(false);
LZipStream testStream = new LZipStream(rewindableStream, CompressionMode.Decompress, true);
if (TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
return(new TarReader(rewindableStream, options, CompressionType.LZip));
}
}
rewindableStream.Rewind(false);
if (RarArchive.IsRarFile(rewindableStream, options))
{
rewindableStream.Rewind(true);
return(RarReader.Open(rewindableStream, options));
}
rewindableStream.Rewind(false);
if (TarArchive.IsTarFile(rewindableStream))
{
rewindableStream.Rewind(true);
return(TarReader.Open(rewindableStream, options));
}
rewindableStream.Rewind(false);
if (XZStream.IsXZStream(rewindableStream))
{
rewindableStream.Rewind(true);
XZStream testStream = new XZStream(rewindableStream);
if (TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
return(new TarReader(rewindableStream, options, CompressionType.Xz));
}
}
throw new InvalidOperationException("Cannot determine compressed stream type. Supported Reader Formats: Zip, GZip, BZip2, Tar, Rar, LZip, XZ");
}
public static bool TryOpen(Stream stream, ReaderOptions options, ArchiveTypeMask archiveTypes, out IReader reader)
{
stream.CheckNotNull("stream");
options = options ?? new ReaderOptions()
{
LeaveStreamOpen = false
};
RewindableStream rewindableStream = new RewindableStream(stream);
rewindableStream.StartRecording();
if (archiveTypes.HasFlag(ArchiveTypeMask.Zip) && ZipArchive.IsZipFile(rewindableStream, options.Password))
{
rewindableStream.Rewind(true);
reader = ZipReader.Open(rewindableStream, options);
return(true);
}
rewindableStream.Rewind(false);
if (archiveTypes.HasFlag(ArchiveTypeMask.GZip) && GZipArchive.IsGZipFile(rewindableStream))
{
rewindableStream.Rewind(false);
GZipStream testStream = new GZipStream(rewindableStream, CompressionMode.Decompress);
if (archiveTypes.HasFlag(ArchiveTypeMask.Tar) && TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
reader = new TarReader(rewindableStream, options, CompressionType.GZip);
return(true);
}
rewindableStream.Rewind(true);
reader = GZipReader.Open(rewindableStream, options);
return(true);
}
rewindableStream.Rewind(false);
if (archiveTypes.HasFlag(ArchiveTypeMask.BZip2) && BZip2Stream.IsBZip2(rewindableStream))
{
rewindableStream.Rewind(false);
BZip2Stream testStream = new BZip2Stream(new NonDisposingStream(rewindableStream), CompressionMode.Decompress, false);
if (archiveTypes.HasFlag(ArchiveTypeMask.Tar) && TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
reader = new TarReader(rewindableStream, options, CompressionType.BZip2);
return(true);
}
}
rewindableStream.Rewind(false);
if (archiveTypes.HasFlag(ArchiveTypeMask.LZip) && LZipStream.IsLZipFile(rewindableStream))
{
rewindableStream.Rewind(false);
LZipStream testStream = new LZipStream(new NonDisposingStream(rewindableStream), CompressionMode.Decompress);
if (archiveTypes.HasFlag(ArchiveTypeMask.Tar) && TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
reader = new TarReader(rewindableStream, options, CompressionType.LZip);
return(true);
}
}
rewindableStream.Rewind(false);
if (archiveTypes.HasFlag(ArchiveTypeMask.Rar) && RarArchive.IsRarFile(rewindableStream, options))
{
rewindableStream.Rewind(true);
reader = RarReader.Open(rewindableStream, options);
return(true);
}
rewindableStream.Rewind(false);
if (archiveTypes.HasFlag(ArchiveTypeMask.Tar) && TarArchive.IsTarFile(rewindableStream))
{
rewindableStream.Rewind(true);
reader = TarReader.Open(rewindableStream, options);
return(true);
}
rewindableStream.Rewind(false);
if (XZStream.IsXZStream(rewindableStream))
{
rewindableStream.Rewind(true);
XZStream testStream = new XZStream(rewindableStream);
if (archiveTypes.HasFlag(ArchiveTypeMask.Tar) && TarArchive.IsTarFile(testStream))
{
rewindableStream.Rewind(true);
reader = new TarReader(rewindableStream, options, CompressionType.Xz);
return(true);
}
}
reader = null;
return(false);
}
