private static bool AddDirectory(ZipArchive zipArchive, DirectoryInfo rootDirectoryInfo, string currentDirectory)
{
string fullDirectoryPath = Path.Combine(rootDirectoryInfo.FullName, currentDirectory);
DirectoryInfo directoryInfo = new DirectoryInfo(fullDirectoryPath);
FileSystemInfo[] fileSystemInfos = directoryInfo.GetFileSystemInfos();
foreach (FileSystemInfo fileSystemInfo in fileSystemInfos)
{
if (fileSystemInfo is FileInfo)
{
FileInfo childFileInfo = fileSystemInfo as FileInfo;
string fileName = Path.Combine(currentDirectory, childFileInfo.Name);
FileStream fileData = new FileStream(childFileInfo.FullName, FileMode.Open);
ZipFileEntry fileEntry = new ZipFileEntry(fileName, fileData);
zipArchive.Entries.Add(fileEntry);
}
else if (fileSystemInfo is DirectoryInfo)
{
DirectoryInfo childDirectoryInfo = fileSystemInfo as DirectoryInfo;
string directoryName = Path.Combine(currentDirectory, childDirectoryInfo.Name);
bool directoryHasEntries = AddDirectory(zipArchive, rootDirectoryInfo, directoryName);
if (!directoryHasEntries)
{
ZipDirectoryEntry directoryEntry = new ZipDirectoryEntry(directoryName);
zipArchive.Entries.Add(directoryEntry);
}
}
}
return (fileSystemInfos.Length != 0);
}
public void ReadFrom(Stream zipStream)
{
while (zipStream.Position < zipStream.Length)
{
BinaryReader reader = new BinaryReader(zipStream, Encoding.ASCII);
uint localFileHeaderSignature = reader.ReadUInt32();
if (localFileHeaderSignature != LOCAL_FILE_HEADER_SIGNATURE)
{
// Local file entries are finished, next records are central directory records
break;
}
ushort versionNeededToExtract = reader.ReadUInt16();
ushort generalPurposeBitFlag = reader.ReadUInt16();
ushort compressionMethod = reader.ReadUInt16();
if (compressionMethod != COMPRESSION_DEFLATE && compressionMethod != COMPRESSION_STORE)
{
throw new NotSupportedException(ARCHIVE_FORMAT_NOT_SUPPORTED_STRING);
}
uint lastModifiedDateTime = reader.ReadUInt32();
uint crc32 = reader.ReadUInt32();
uint compressedSize = reader.ReadUInt32();
uint uncompressedSize = reader.ReadUInt32();
ushort fileNameLength = reader.ReadUInt16();
ushort extraFieldLength = reader.ReadUInt16();
if (extraFieldLength != 0)
{
throw new NotSupportedException(ARCHIVE_FORMAT_NOT_SUPPORTED_STRING);
}
byte[] fileNameBytes = reader.ReadBytes(fileNameLength);
Encoding fileNameEncoding;
if ((generalPurposeBitFlag & UTF8_FILE_NAME_ENCODING_FLAG) != 0)
{
fileNameEncoding = new UTF8Encoding();
}
else
{
fileNameEncoding = Encoding.GetEncoding((int)GetOEMCP());
}
string fileName = new string(fileNameEncoding.GetChars(fileNameBytes));
// According to ZIP specification, ZIP archives generally
// contain forward slashes so make Windows file name
fileName = fileName.Replace('/', Path.DirectorySeparatorChar);
ZipEntry entry = null;
if (uncompressedSize != 0)
{
byte[] fileData = reader.ReadBytes((int)compressedSize);
MemoryStream fileDataStream = new MemoryStream(fileData);
ZipFileEntry fileEntry = new ZipFileEntry(fileName, fileDataStream);
if (compressionMethod == COMPRESSION_DEFLATE)
{
fileDataStream.Position = 0;
DeflateStream deflateStream = new DeflateStream(fileDataStream, CompressionMode.Decompress);
byte[] uncompressedFileData = new byte[uncompressedSize];
deflateStream.Read(uncompressedFileData, 0, (int)uncompressedSize);
fileEntry.Data = new MemoryStream(uncompressedFileData);
}
entry = fileEntry;
}
else if (fileName.EndsWith(@"\"))
{
entry = new ZipDirectoryEntry(fileName);
}
else
{
entry = new ZipFileEntry(fileName, null);
}
entry.SetLastModifiedDateTime(lastModifiedDateTime);
entries.Add(entry);
}
}
public void WriteTo(Stream zipStream, CompressionMethod compressionMethod, bool encodeFileNamesInUTF8)
{
MemoryStream centralDirectory = new MemoryStream();
BinaryWriter centralDirectoryWriter = new BinaryWriter(centralDirectory);
BinaryWriter zipStreamWriter = new BinaryWriter(zipStream);
foreach (ZipEntry entry in entries)
{
Encoding fileNameEncoding = encodeFileNamesInUTF8
? new UTF8Encoding()
: Encoding.GetEncoding((int)GetOEMCP());
uint crc32 = 0;
uint compressedSize = 0;
uint uncompressedSize = 0;
string fileName = null;
Stream compressedData = null;
if (entry is ZipFileEntry)
{
ZipFileEntry fileEntry = entry as ZipFileEntry;
fileName = fileEntry.FileName;
if (fileEntry.Data != null && fileEntry.Data.Length != 0)
{
compressedData = fileEntry.Data;
if (compressionMethod == CompressionMethod.Deflate)
{
MemoryStream compressedStream = new MemoryStream();
DeflateStream deflateStream = new DeflateStream(compressedStream, CompressionMode.Compress, true);
WriteStream(fileEntry.Data, deflateStream);
deflateStream.Close();
compressedData = compressedStream;
}
crc32 = fileEntry.Crc;
compressedSize = (uint)compressedData.Length;
uncompressedSize = (uint)fileEntry.Data.Length;
}
else
{
crc32 = 0;
compressedSize = 0;
uncompressedSize = 0;
}
}
else
{
ZipDirectoryEntry directoryEntry = entry as ZipDirectoryEntry;
fileName = directoryEntry.DirectoryName;
}
// According to ZIP specification, file names should use only forward slashes
// to be compatible with Unix file systems
fileName = fileName.Replace(Path.DirectorySeparatorChar, '/');
if (entry is ZipDirectoryEntry && !fileName.EndsWith("/"))
{
// Directories should contain slash at the end
fileName += "/";
}
byte[] fileNameBytes = fileNameEncoding.GetBytes(fileName);
ushort versionNeededToExtract = VERSION_NEEDED_TO_EXTRACT;
ushort generalPurposeBitFlag = encodeFileNamesInUTF8 ? UTF8_FILE_NAME_ENCODING_FLAG : (ushort)0;
uint lastModifiedDateTime = entry.GetLastModifiedDateTime();
ushort fileNameLength = (ushort)fileNameBytes.Length;
ushort extraFieldLength = 0;
uint localHeaderPosition = (uint)zipStream.Position;
zipStreamWriter.Write(LOCAL_FILE_HEADER_SIGNATURE);
zipStreamWriter.Write(versionNeededToExtract);
zipStreamWriter.Write(generalPurposeBitFlag);
zipStreamWriter.Write((ushort)compressionMethod);
zipStreamWriter.Write(lastModifiedDateTime);
zipStreamWriter.Write(crc32);
zipStreamWriter.Write(compressedSize);
zipStreamWriter.Write(uncompressedSize);
zipStreamWriter.Write(fileNameLength);
zipStreamWriter.Write(extraFieldLength);
zipStreamWriter.Write(fileNameBytes, 0, fileNameBytes.Length);
if (compressedData != null)
{
WriteStream(compressedData, zipStream);
}
centralDirectoryWriter.Write(CENTRAL_FILE_HEADER_SIGNATURE);
centralDirectoryWriter.Write(VERSION_NEEDED_TO_EXTRACT);
centralDirectoryWriter.Write(VERSION_NEEDED_TO_EXTRACT);
centralDirectoryWriter.Write(generalPurposeBitFlag);
centralDirectoryWriter.Write((ushort)compressionMethod);
centralDirectoryWriter.Write(lastModifiedDateTime);
centralDirectoryWriter.Write(crc32);
centralDirectoryWriter.Write(compressedSize);
centralDirectoryWriter.Write(uncompressedSize);
centralDirectoryWriter.Write(fileNameLength);
centralDirectoryWriter.Write(extraFieldLength);
centralDirectoryWriter.Write((ushort)0); // file comment length
centralDirectoryWriter.Write((ushort)0); // disk number start
centralDirectoryWriter.Write((ushort)0); // internal file attributes
centralDirectoryWriter.Write((uint)0); // external file attributes
centralDirectoryWriter.Write(localHeaderPosition); // relative offset of local header
centralDirectoryWriter.Write(fileNameBytes, 0, fileNameBytes.Length);
}
uint centralDirectorySize = (uint)centralDirectory.Length;
uint centralDirectoryOffset = (uint)zipStream.Position;
centralDirectoryWriter.Write(END_OF_CENTRAL_DIR_SIGNATURE);
centralDirectoryWriter.Write((ushort)0); // number of this disk
centralDirectoryWriter.Write((ushort)0); // number of the disk with the start of the central directory
centralDirectoryWriter.Write((ushort)entries.Count); // total number of entries in the central directory on this disk
centralDirectoryWriter.Write((ushort)entries.Count); // total number of entries in the central directory
centralDirectoryWriter.Write((uint)centralDirectorySize); // size of the central directory
centralDirectoryWriter.Write((uint)centralDirectoryOffset); // offset of start of central directory with respect to the starting disk number
centralDirectoryWriter.Write((ushort)0); // .ZIP file comment length
WriteStream(centralDirectory, zipStream);
}
public static void CreateFromFile(string sourceFile, Stream outputZipStream)
{
if (File.Exists(sourceFile))
{
ZipArchive archive = new ZipArchive();
string fileName = Path.GetFileName(sourceFile);
Stream fileData = new FileStream(sourceFile, FileMode.Open);
ZipFileEntry fileEntry = new ZipFileEntry(fileName, fileData);
archive.Entries.Add(fileEntry);
archive.WriteTo(outputZipStream);
}
}
public void ReadFrom(Stream zipStream)
{
while (zipStream.Position < zipStream.Length)
{
BinaryReader reader = new BinaryReader(zipStream, Encoding.ASCII);
uint localFileHeaderSignature = reader.ReadUInt32();
if (localFileHeaderSignature != LOCAL_FILE_HEADER_SIGNATURE)
{
// Local file entries are finished, next records are central directory records
break;
}
ushort versionNeededToExtract = reader.ReadUInt16();
ushort generalPurposeBitFlag = reader.ReadUInt16();
ushort compressionMethod = reader.ReadUInt16();
if (compressionMethod != COMPRESSION_DEFLATE && compressionMethod != COMPRESSION_STORE)
{
throw new NotSupportedException(ARCHIVE_FORMAT_NOT_SUPPORTED_STRING);
}
uint lastModifiedDateTime = reader.ReadUInt32();
uint crc32 = reader.ReadUInt32();
uint compressedSize = reader.ReadUInt32();
uint uncompressedSize = reader.ReadUInt32();
ushort fileNameLength = reader.ReadUInt16();
ushort extraFieldLength = reader.ReadUInt16();
if (extraFieldLength != 0)
{
throw new NotSupportedException(ARCHIVE_FORMAT_NOT_SUPPORTED_STRING);
}
byte[] fileNameBytes = reader.ReadBytes(fileNameLength);
Encoding fileNameEncoding;
if ((generalPurposeBitFlag & UTF8_FILE_NAME_ENCODING_FLAG) != 0)
{
fileNameEncoding = new UTF8Encoding();
}
else
{
fileNameEncoding = Encoding.GetEncoding((int)GetOEMCP());
}
string fileName = new string(fileNameEncoding.GetChars(fileNameBytes));
// According to ZIP specification, ZIP archives generally
// contain forward slashes so make Windows file name
fileName = fileName.Replace('/', Path.DirectorySeparatorChar);
ZipEntry entry = null;
if (uncompressedSize != 0)
{
byte[] fileData = reader.ReadBytes((int)compressedSize);
MemoryStream fileDataStream = new MemoryStream(fileData);
ZipFileEntry fileEntry = new ZipFileEntry(fileName, fileDataStream);
if (compressionMethod == COMPRESSION_DEFLATE)
{
fileDataStream.Position = 0;
DeflateStream deflateStream = new DeflateStream(fileDataStream, CompressionMode.Decompress);
byte[] uncompressedFileData = new byte[uncompressedSize];
deflateStream.Read(uncompressedFileData, 0, (int)uncompressedSize);
fileEntry.Data = new MemoryStream(uncompressedFileData);
}
entry = fileEntry;
}
else if (fileName.EndsWith(@"\"))
{
entry = new ZipDirectoryEntry(fileName);
}
else
{
entry = new ZipFileEntry(fileName, null);
}
entry.SetLastModifiedDateTime(lastModifiedDateTime);
entries.Add(entry);
}
}
