public void ExtractEntry(Entry entry, Stream outputStream, ZipProgressHandler progressHandler = null)
{
if (entry.Offset >= _Stream.Length)
{
throw new Exception("Invalid ZIP entry offset");
}
_Stream.Seek(entry.Offset, SeekOrigin.Begin);
byte[] buffer = new byte[1024 * 1024];
_Stream.Read(buffer, 0, 30);
ushort fileNameLength = BitConverter.ToUInt16(buffer, 26);
ushort extraFieldLength = BitConverter.ToUInt16(buffer, 28);
_Stream.Seek(entry.Offset + 30 + fileNameLength + extraFieldLength, SeekOrigin.Begin);
Stream dataStream;
switch (entry.CompressionMethod)
{
case 0:
dataStream = _Stream;
break;
case 8:
dataStream = new System.IO.Compression.DeflateStream(_Stream, System.IO.Compression.CompressionMode.Decompress, true);
break;
default:
throw new Exception("Unsupported ZIP compression method: " + entry.CompressionMethod + " for " + entry.FileName);
}
uint done = 0;
while (done < entry.UncompressedSize)
{
int todo = (int)Math.Min(entry.UncompressedSize - done, (uint)buffer.Length);
if (dataStream.Read(buffer, 0, todo) != todo)
{
throw new Exception("Cannot read data from ZIP stream for " + entry.FileName);
}
outputStream.Write(buffer, 0, todo);
done += (uint)todo;
if (progressHandler != null)
{
progressHandler(done, entry.UncompressedSize);
}
}
if (dataStream != _Stream)
{
dataStream.Dispose();
}
}
/// <summary>
/// 压缩多层目录
/// </summary>
/// <param name="strDirectory">The directory.</param>
/// <param name="zipedFile">The ziped file.</param>
public static void ZipFileDirectory(string strDirectory, string zipedFile, ZipProgressHandler progressHandler = null, ZipCompleteHandler completeHandler = null)
{
using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
{
using (ZipOutputStream s = new ZipOutputStream(ZipFile))
{
ZipSetp(strDirectory, s, "", progressHandler, completeHandler);
if (completeHandler != null)
{
completeHandler();
}
}
}
}
public void ExtractEntry(Entry entry, Stream outputStream, ZipProgressHandler progressHandler = null)
{
if (entry.Offset >= _Stream.Length)
throw new Exception("Invalid ZIP entry offset");
_Stream.Seek(entry.Offset, SeekOrigin.Begin);
byte[] buffer = new byte[1024 * 1024];
_Stream.Read(buffer, 0, 30);
ushort fileNameLength = BitConverter.ToUInt16(buffer, 26);
ushort extraFieldLength = BitConverter.ToUInt16(buffer, 28);
_Stream.Seek(entry.Offset + 30 + fileNameLength + extraFieldLength, SeekOrigin.Begin);
Stream dataStream;
switch (entry.CompressionMethod)
{
case 0:
dataStream = _Stream;
break;
case 8:
dataStream = new System.IO.Compression.DeflateStream(_Stream, System.IO.Compression.CompressionMode.Decompress, true);
break;
default:
throw new Exception("Unsupported ZIP compression method: " + entry.CompressionMethod + " for " + entry.FileName);
}
uint done = 0;
while (done < entry.UncompressedSize)
{
int todo = (int)Math.Min(entry.UncompressedSize - done, (uint)buffer.Length);
if (dataStream.Read(buffer, 0, todo) != todo)
throw new Exception("Cannot read data from ZIP stream for " + entry.FileName);
outputStream.Write(buffer, 0, todo);
done += (uint)todo;
if (progressHandler != null)
progressHandler(done, entry.UncompressedSize);
}
if (dataStream != _Stream)
dataStream.Dispose();
}
/// <summary>
/// 递归遍历目录
/// </summary>
/// <param name="strDirectory">The directory.</param>
/// <param name="s">The ZipOutputStream Object.</param>
/// <param name="parentPath">The parent path.</param>
private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath, ZipProgressHandler progressHandler = null, ZipCompleteHandler completeHandler = null)
{
if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar)
{
strDirectory += Path.DirectorySeparatorChar;
}
string[] filenames = Directory.GetFileSystemEntries(strDirectory);
int i = 0;
int count = filenames.Length;
foreach (string file in filenames) // 遍历所有的文件和目录
{
if (Directory.Exists(file)) // 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
{
string pPath = parentPath;
pPath += file.Substring(file.LastIndexOf("\\") + 1);
pPath += "\\";
ZipSetp(file, s, pPath, progressHandler, completeHandler);
}
else // 否则直接压缩文件
{
//打开压缩文件
using (FileStream fs = File.OpenRead(file))
{
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1);
ZipEntry entry = new ZipEntry(fileName);
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
i++;
if (progressHandler != null)
{
progressHandler(fileName, i, count);
}
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
}
}
/// <summary>
/// 解压缩文件(压缩文件中含有子目录)
/// </summary>
/// <param name="zipfilepath">待解压缩的文件路径</param>
/// <param name="unzippath">解压缩到指定目录</param>
/// <returns>解压后的文件列表</returns>
public static void UnZipDir(string zipfilepath, string unzippath, ZipProgressHandler progressHandler = null, ZipCompleteHandler completeHandler = null, ZipErrorHandler errorHandler = null, bool replace = true)
{
try
{
using (FileStream filestream = File.OpenRead(zipfilepath))
{
string zipfilename = Path.GetFileName(zipfilepath);
//检查输出目录是否以“\\”结尾
if (unzippath.EndsWithNonAlloc("/") == false || unzippath.EndsWithNonAlloc(":/") == false)
{
unzippath += "/";
}
ZipInputStream s = new ZipInputStream(filestream);
string directoryName = Path.GetDirectoryName(unzippath);
//生成解压目录【用户解压到硬盘根目录时，不需要创建】
if (!string.IsNullOrEmpty(directoryName))
{
Directory.CreateDirectory(directoryName);
}
string filePath;
string fileName;
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
fileName = Path.GetFileName(theEntry.Name);
long read_size = 0;
if (!string.IsNullOrEmpty(fileName))
{
//如果文件的压缩后大小为0那么说明这个文件是空的,因此不需要进行读出写入
if (theEntry.CompressedSize == 0)
{
break;
}
filePath = string.Format("{0}{1}", unzippath, theEntry.Name);
filePath = filePath.Replace("\\", "/");
if (replace == false && File.Exists(filePath))
{
continue;
}
//建立下面的目录和子目录
Directory.CreateDirectory(Path.GetDirectoryName(filePath));
FileStream streamWriter = File.Create(filePath);
int size = 1024;
byte[] data = new byte[1024];
while (true)
{
size = s.Read(data, 0, data.Length);
if (size > 0)
{
read_size += size;
streamWriter.Write(data, 0, size);
if (progressHandler != null)
{
string message = string.Format("{0}({1})", zipfilename, Path.GetFileNameWithoutExtension(theEntry.Name));
progressHandler(message, read_size, s.Length);
}
}
else
{
break;
}
}
streamWriter.Close();
}
}
s.Dispose();
s.Close();
//GC.Collect();
if (completeHandler != null)
{
completeHandler();
}
}
}
catch (Exception e)
{
if (errorHandler != null)
{
errorHandler(e.Message);
}
DebugLogger.Log(e);
}
}
