/// <summary>
/// Unpacks a single file from an archive or archive chain.
/// </summary>
private void UnpackOneFile(
IUnpackStreamContext streamContext,
ZipFileHeader header,
ref Stream archiveStream)
{
ZipFileInfo fileInfo = null;
Stream fileStream = null;
try
{
Converter <Stream, Stream> compressionStreamCreator;
if (!ZipEngine.decompressionStreamCreators.TryGetValue(
header.compressionMethod, out compressionStreamCreator))
{
// Silently skip files of an unsupported compression method.
return;
}
long compressedSize;
long uncompressedSize;
long localHeaderOffset;
int archiveNumber;
uint crc;
header.GetZip64Fields(
out compressedSize,
out uncompressedSize,
out localHeaderOffset,
out archiveNumber,
out crc);
if (this.currentArchiveNumber != archiveNumber + 1)
{
if (archiveStream != null)
{
streamContext.CloseArchiveReadStream(
this.currentArchiveNumber,
String.Empty,
archiveStream);
archiveStream = null;
this.OnProgress(ArchiveProgressType.FinishArchive);
this.currentArchiveName = null;
}
this.currentArchiveNumber = (short)(archiveNumber + 1);
this.currentArchiveBytesProcessed = 0;
this.currentArchiveTotalBytes = 0;
archiveStream = this.OpenArchive(
streamContext, this.currentArchiveNumber);
FileStream archiveFileStream = archiveStream as FileStream;
this.currentArchiveName = (archiveFileStream != null ?
Path.GetFileName(archiveFileStream.Name) : null);
this.currentArchiveTotalBytes = archiveStream.Length;
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.StartArchive);
this.currentArchiveNumber++;
}
archiveStream.Seek(localHeaderOffset, SeekOrigin.Begin);
ZipFileHeader localHeader = new ZipFileHeader();
if (!localHeader.Read(archiveStream, false) ||
!ZipEngine.AreFilePathsEqual(localHeader.fileName, header.fileName))
{
string msg = "Could not read file: " + header.fileName;
throw new ZipException(msg);
}
fileInfo = header.ToZipFileInfo();
fileStream = streamContext.OpenFileWriteStream(
fileInfo.FullName,
fileInfo.Length,
fileInfo.LastWriteTime);
if (fileStream != null)
{
this.currentFileName = header.fileName;
this.currentFileBytesProcessed = 0;
this.currentFileTotalBytes = fileInfo.Length;
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.StartFile);
this.currentArchiveNumber++;
this.UnpackFileBytes(
streamContext,
fileInfo.FullName,
fileInfo.CompressedLength,
fileInfo.Length,
header.crc32,
fileStream,
compressionStreamCreator,
ref archiveStream);
}
}
finally
{
if (fileStream != null)
{
streamContext.CloseFileWriteStream(
fileInfo.FullName,
fileStream,
fileInfo.Attributes,
fileInfo.LastWriteTime);
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.FinishFile);
this.currentArchiveNumber++;
}
}
}
/// <summary>
/// Unpacks a single file from an archive or archive chain.
/// </summary>
private void UnpackOneFile(
IUnpackStreamContext streamContext,
ZipFileHeader header,
ref Stream archiveStream)
{
ZipFileInfo fileInfo = null;
Stream fileStream = null;
try
{
Converter<Stream, Stream> compressionStreamCreator;
if (!ZipEngine.decompressionStreamCreators.TryGetValue(
header.compressionMethod, out compressionStreamCreator))
{
// Silently skip files of an unsupported compression method.
return;
}
long compressedSize;
long uncompressedSize;
long localHeaderOffset;
int archiveNumber;
uint crc;
header.GetZip64Fields(
out compressedSize,
out uncompressedSize,
out localHeaderOffset,
out archiveNumber,
out crc);
if (this.currentArchiveNumber != archiveNumber + 1)
{
if (archiveStream != null)
{
streamContext.CloseArchiveReadStream(
this.currentArchiveNumber,
String.Empty,
archiveStream);
archiveStream = null;
this.OnProgress(ArchiveProgressType.FinishArchive);
this.currentArchiveName = null;
}
this.currentArchiveNumber = (short) (archiveNumber + 1);
this.currentArchiveBytesProcessed = 0;
this.currentArchiveTotalBytes = 0;
archiveStream = this.OpenArchive(
streamContext, this.currentArchiveNumber);
FileStream archiveFileStream = archiveStream as FileStream;
this.currentArchiveName = (archiveFileStream != null ?
Path.GetFileName(archiveFileStream.Name) : null);
this.currentArchiveTotalBytes = archiveStream.Length;
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.StartArchive);
this.currentArchiveNumber++;
}
archiveStream.Seek(localHeaderOffset, SeekOrigin.Begin);
ZipFileHeader localHeader = new ZipFileHeader();
if (!localHeader.Read(archiveStream, false) ||
!ZipEngine.AreFilePathsEqual(localHeader.fileName, header.fileName))
{
string msg = "Could not read file: " + header.fileName;
throw new ZipException(msg);
}
fileInfo = header.ToZipFileInfo();
fileStream = streamContext.OpenFileWriteStream(
fileInfo.FullName,
fileInfo.Length,
fileInfo.LastWriteTime);
if (fileStream != null)
{
this.currentFileName = header.fileName;
this.currentFileBytesProcessed = 0;
this.currentFileTotalBytes = fileInfo.Length;
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.StartFile);
this.currentArchiveNumber++;
this.UnpackFileBytes(
streamContext,
fileInfo.FullName,
fileInfo.CompressedLength,
fileInfo.Length,
header.crc32,
fileStream,
compressionStreamCreator,
ref archiveStream);
}
}
finally
{
if (fileStream != null)
{
streamContext.CloseFileWriteStream(
fileInfo.FullName,
fileStream,
fileInfo.Attributes,
fileInfo.LastWriteTime);
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.FinishFile);
this.currentArchiveNumber++;
}
}
}
