GZip使用

class Program
{
static void Main(string[] args)
{
//Trace.Listeners.Clear();
//Trace.Listeners.Add(new TextWriterTraceListener("app.log"));
//Trace.AutoFlush = true;
//Trace.TraceInformation(Environment.CurrentDirectory + "环境目录：" + DateTime.Now.ToString("yyyMMdd HH:mm:ss"));
//UnCompressRar(Environment.CurrentDirectory, Environment.CurrentDirectory, "update.zip");
Thread.Sleep(1000);
UnCompressRar(Environment.CurrentDirectory, "update.zip");
Process.Start(Environment.CurrentDirectory + @"\www.CForm.exe");
}
/// <summary>
/// 验证WinRar是否安装。
/// </summary>
/// <returns>true：已安装，false：未安装</returns>
private static bool ExistsRar(out String winRarPath)
{
winRarPath = String.Empty;
//通过Regedit（注册表）找到WinRar文件
var registryKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\WinRAR.exe");
if (registryKey == null) return false;//未安装
//registryKey = theReg;可以直接返回Registry对象供会面操作
winRarPath = registryKey.GetValue("").ToString();
//这里为节约资源，直接返回路径，反正下面也没用到
registryKey.Close();//关闭注册表
return !String.IsNullOrEmpty(winRarPath);
}
/// <summary>
/// 解压文件
/// </summary>
/// <param name="unRarPath">解压到的路径</param>
/// <param name="rarPath">rar存放路径</param>
/// <param name="rarName">rar名字</param>
/// <returns></returns>
public static String UnCompressRar(String unRarPath, String rarPath, String rarName)
{
try
{
String winRarPath = null;
if (!ExistsRar(out winRarPath)) return "";
//验证WinRar是否安装。
if (Directory.Exists(unRarPath) == false)
{
Directory.CreateDirectory(unRarPath);
}
var pathInfo = "x " + rarName + " " + unRarPath + " -y";
var process = new Process
{
StartInfo = new ProcessStartInfo
{
FileName = winRarPath,//执行的文件名
Arguments = pathInfo,//需要执行的命令
UseShellExecute = false,//使用Shell执行
WindowStyle = ProcessWindowStyle.Hidden,//隐藏窗体
WorkingDirectory = rarPath,//rar 存放位置
CreateNoWindow = false,//不显示窗体
},
};
process.Start();//开始执行
process.WaitForExit();//等待完成并退出
process.Close();//关闭调用 cmd 的什么什么
}
catch (Exception ex)
{
throw ex;
}
return unRarPath;
}

/// <summary>
/// 解压文件
/// </summary>
/// <param name="unRarPath">解压到的路径</param>
/// <param name="rarPath">rar存放路径</param>
/// <param name="rarName">rar名字</param>
/// <returns></returns>
public static void UnCompressRar(String rarPath, String rarName)
{
try
{
//压缩
//Trace.TraceInformation("1234566,这时开始压缩。。。。" + rarPath + "。。。" + rarName + "。。。" + rarName);
//string targetFolder = Path.Combine(rarPath, "update");
GZip.Decompress(rarPath, rarPath, rarName);
//Trace.TraceInformation("1234566,压缩。。。。结束");
}
catch (Exception ex)
{
throw ex;
}
}
}
public static class GZip
{
private static string directoryPath = @"c:\temp";
public static void Testmethod()
{
DirectoryInfo directorySelected = new DirectoryInfo(directoryPath);
CompressSingle(directorySelected);

foreach (FileInfo fileToDecompress in directorySelected.GetFiles("*.gz"))
{
DecompressSingle(fileToDecompress);
}
}

public static void CompressSingle(DirectoryInfo directorySelected)
{
foreach (FileInfo fileToCompress in directorySelected.GetFiles())
{
using (FileStream originalFileStream = fileToCompress.OpenRead())
{
if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fileToCompress.Extension != ".zip")
{
using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + ".zip"))
{
using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
{
//originalFileStream.CopyTo(compressionStream); 4.0版本

//开辟内存空间
byte[] buffer = new byte[1024 * 500]; //缓冲区大小
long offset = -1;
while ((offset = originalFileStream.Read(buffer, 0, buffer.Length)) != 0)
{
compressionStream.Write(buffer, 0, (int)offset);
}
}
}
FileInfo info = new FileInfo(directoryPath + "\\" + fileToCompress.Name + ".gz");
Console.WriteLine("Compressed {0} from {1} to {2} bytes.", fileToCompress.Name, fileToCompress.Length.ToString(), info.Length.ToString());
}

}
}
}

public static void DecompressSingle(FileInfo fileToDecompress)
{
using (FileStream originalFileStream = fileToDecompress.OpenRead())
{
string currentFileName = fileToDecompress.FullName;
string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);

using (FileStream decompressedFileStream = File.Create(newFileName))
{
using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress))
{
//decompressionStream.CopyTo(decompressedFileStream);4.0版本
Console.WriteLine("Decompressed: {0}", fileToDecompress.Name);
//开辟内存空间
byte[] buffer = new byte[1024 * 500]; //缓冲区大小
long offset = -1;
while ((offset = decompressionStream.Read(buffer, 0, buffer.Length)) != 0)
{
decompressedFileStream.Write(buffer, 0, (int)offset);
}
}
}
}
}

/// <summary>
/// Compress
/// </summary>
/// <param name="lpSourceFolder">The location of the files to include in the zip file, all files including files in subfolders will be included.</param>
/// <param name="lpDestFolder">Folder to write the zip file into</param>
/// <param name="zipFileName">Name of the zip file to write</param>
public static GZipResult Compress(string lpSourceFolder, string lpDestFolder, string zipFileName)
{
return Compress(lpSourceFolder, "*.*", SearchOption.AllDirectories, lpDestFolder, zipFileName, true);
}

/// <summary>
/// Compress
/// </summary>
/// <param name="lpSourceFolder">The location of the files to include in the zip file</param>
/// <param name="searchPattern">Search pattern (ie "*.*" or "*.txt" or "*.gif") to idendify what files in lpSourceFolder to include in the zip file</param>
/// <param name="searchOption">Only files in lpSourceFolder or include files in subfolders also</param>
/// <param name="lpDestFolder">Folder to write the zip file into</param>
/// <param name="zipFileName">Name of the zip file to write</param>
/// <param name="deleteTempFile">Boolean, true deleted the intermediate temp file, false leaves the temp file in lpDestFolder (for debugging)</param>
public static GZipResult Compress(string lpSourceFolder, string searchPattern, SearchOption searchOption, string lpDestFolder, string zipFileName, bool deleteTempFile)
{
DirectoryInfo di = new DirectoryInfo(lpSourceFolder);
FileInfo[] files = di.GetFiles("*.*", searchOption);
return Compress(files, lpSourceFolder, lpDestFolder, zipFileName, deleteTempFile);
}

/// <summary>
/// Compress
/// </summary>
/// <param name="files">Array of FileInfo objects to be included in the zip file</param>
/// <param name="folders">Array of Folder string</param>
/// <param name="lpBaseFolder">Base folder to use when creating relative paths for the files
/// stored in the zip file. For example, if lpBaseFolder is 'C:\zipTest\Files\', and there is a file
/// 'C:\zipTest\Files\folder1\sample.txt' in the 'files' array, the relative path for sample.txt
/// will be 'folder1/sample.txt'</param>
/// <param name="lpDestFolder">Folder to write the zip file into</param>
/// <param name="zipFileName">Name of the zip file to write</param>
public static GZipResult Compress(FileInfo[] files, string[] folders, string lpBaseFolder, string lpDestFolder, string zipFileName)
{
//support compress folder
List<FileInfo> list = new List<FileInfo>();
foreach (FileInfo li in files)
{
list.Add(li);
}

foreach (string str in folders)
{
DirectoryInfo di = new DirectoryInfo(str);
foreach (FileInfo info in di.GetFiles("*.*", SearchOption.AllDirectories))
{
list.Add(info);
}
}

return Compress(list.ToArray(), lpBaseFolder, lpDestFolder, zipFileName, true);
}

/// <summary>
/// Compress
/// </summary>
/// <param name="files">Array of FileInfo objects to be included in the zip file</param>
/// <param name="lpBaseFolder">Base folder to use when creating relative paths for the files
/// stored in the zip file. For example, if lpBaseFolder is 'C:\zipTest\Files\', and there is a file
/// 'C:\zipTest\Files\folder1\sample.txt' in the 'files' array, the relative path for sample.txt
/// will be 'folder1/sample.txt'</param>
/// <param name="lpDestFolder">Folder to write the zip file into</param>
/// <param name="zipFileName">Name of the zip file to write</param>
public static GZipResult Compress(FileInfo[] files, string lpBaseFolder, string lpDestFolder, string zipFileName)
{
return Compress(files, lpBaseFolder, lpDestFolder, zipFileName, true);
}

/// <summary>
/// Compress
/// </summary>
/// <param name="files">Array of FileInfo objects to be included in the zip file</param>
/// <param name="lpBaseFolder">Base folder to use when creating relative paths for the files
/// stored in the zip file. For example, if lpBaseFolder is 'C:\zipTest\Files\', and there is a file
/// 'C:\zipTest\Files\folder1\sample.txt' in the 'files' array, the relative path for sample.txt
/// will be 'folder1/sample.txt'</param>
/// <param name="lpDestFolder">Folder to write the zip file into</param>
/// <param name="zipFileName">Name of the zip file to write</param>
/// <param name="deleteTempFile">Boolean, true deleted the intermediate temp file, false leaves the temp file in lpDestFolder (for debugging)</param>
public static GZipResult Compress(FileInfo[] files, string lpBaseFolder, string lpDestFolder, string zipFileName, bool deleteTempFile)
{
GZipResult result = new GZipResult();

try
{
if (!lpDestFolder.EndsWith("\\"))
{
lpDestFolder += "\\";
}

string lpTempFile = lpDestFolder + zipFileName + ".tmp";
string lpZipFile = lpDestFolder + zipFileName;

result.TempFile = lpTempFile;
result.ZipFile = lpZipFile;

if (files != null && files.Length > 0)
{
CreateTempFile(files, lpBaseFolder, lpTempFile, result);

if (result.FileCount > 0)
{
CreateZipFile(lpTempFile, lpZipFile, result);
}

// delete the temp file
if (deleteTempFile)
{
File.Delete(lpTempFile);
result.TempFileDeleted = true;
}
}
}
catch //(Exception ex4)
{
result.Errors = true;
}
return result;
}

private static void CreateZipFile(string lpSourceFile, string lpZipFile, GZipResult result)
{
byte[] buffer;
int count = 0;
FileStream fsOut = null;
FileStream fsIn = null;
GZipStream gzip = null;

// compress the file into the zip file
try
{
fsOut = new FileStream(lpZipFile, FileMode.Create, FileAccess.Write, FileShare.None);
gzip = new GZipStream(fsOut, CompressionMode.Compress, true);

fsIn = new FileStream(lpSourceFile, FileMode.Open, FileAccess.Read, FileShare.Read);
buffer = new byte[fsIn.Length];
count = fsIn.Read(buffer, 0, buffer.Length);
fsIn.Close();
fsIn = null;

// compress to the zip file
gzip.Write(buffer, 0, buffer.Length);

result.ZipFileSize = fsOut.Length;
result.CompressionPercent = GetCompressionPercent(result.TempFileSize, result.ZipFileSize);
}
catch //(Exception ex1)
{
result.Errors = true;
}
finally
{
if (gzip != null)
{
gzip.Close();
gzip = null;
}
if (fsOut != null)
{
fsOut.Close();
fsOut = null;
}
if (fsIn != null)
{
fsIn.Close();
fsIn = null;
}
}
}

private static void CreateTempFile(FileInfo[] files, string lpBaseFolder, string lpTempFile, GZipResult result)
{
byte[] buffer;
int count = 0;
byte[] header;
string fileHeader = null;
string fileModDate = null;
string lpFolder = null;
int fileIndex = 0;
string lpSourceFile = null;
string vpSourceFile = null;
GZipFileInfo gzf = null;
FileStream fsOut = null;
FileStream fsIn = null;

if (files != null && files.Length > 0)
{
try
{
result.Files = new GZipFileInfo[files.Length];

// open the temp file for writing
fsOut = new FileStream(lpTempFile, FileMode.Create, FileAccess.Write, FileShare.None);

foreach (FileInfo fi in files)
{
lpFolder = fi.DirectoryName + "\\";
try
{
gzf = new GZipFileInfo();
gzf.Index = fileIndex;

// read the source file, get its virtual path within the source folder
lpSourceFile = fi.FullName;
gzf.LocalPath = lpSourceFile;
vpSourceFile = lpSourceFile.Replace(lpBaseFolder, string.Empty);
vpSourceFile = vpSourceFile.Replace("\\", "/");
gzf.RelativePath = vpSourceFile;

fsIn = new FileStream(lpSourceFile, FileMode.Open, FileAccess.Read, FileShare.Read);
buffer = new byte[fsIn.Length];
count = fsIn.Read(buffer, 0, buffer.Length);
fsIn.Close();
fsIn = null;

fileModDate = fi.LastWriteTimeUtc.ToString();
gzf.ModifiedDate = fi.LastWriteTimeUtc;
gzf.Length = buffer.Length;

fileHeader = fileIndex.ToString() + "," + vpSourceFile + "," + fileModDate + "," + buffer.Length.ToString() + "\n";
header = Encoding.Default.GetBytes(fileHeader);

fsOut.Write(header, 0, header.Length);
fsOut.Write(buffer, 0, buffer.Length);
fsOut.WriteByte(10); // linefeed

gzf.AddedToTempFile = true;

// update the result object
result.Files[fileIndex] = gzf;

// increment the fileIndex
fileIndex++;
}
catch //(Exception ex1)
{
result.Errors = true;
}
finally
{
if (fsIn != null)
{
fsIn.Close();
fsIn = null;
}
}
if (fsOut != null)
{
result.TempFileSize = fsOut.Length;
}
}
}
catch //(Exception ex2)
{
result.Errors = true;
}
finally
{
if (fsOut != null)
{
fsOut.Close();
fsOut = null;
}
}
}

result.FileCount = fileIndex;
}

public static GZipResult Decompress(string lpSourceFolder, string lpDestFolder, string zipFileName)
{
return Decompress(lpSourceFolder, lpDestFolder, zipFileName, true, true, null, null, 4096);
}

public static GZipResult Decompress(string lpSourceFolder, string lpDestFolder, string zipFileName, bool writeFiles, string addExtension)
{
return Decompress(lpSourceFolder, lpDestFolder, zipFileName, true, writeFiles, addExtension, null, 4096);
}

public static GZipResult Decompress(string lpSrcFolder, string lpDestFolder, string zipFileName, bool deleteTempFile, bool writeFiles, string addExtension, Hashtable htFiles, int bufferSize)
{
GZipResult result = new GZipResult();

if (!lpSrcFolder.EndsWith("\\"))
{
lpSrcFolder += "\\";
}

if (!lpDestFolder.EndsWith("\\"))
{
lpDestFolder += "\\";
}

string lpTempFile = lpSrcFolder + zipFileName + ".tmp";
string lpZipFile = lpSrcFolder + zipFileName;

result.TempFile = lpTempFile;
result.ZipFile = lpZipFile;

string line = null;
string lpFilePath = null;
string lpFolder = null;
GZipFileInfo gzf = null;
FileStream fsTemp = null;
ArrayList gzfs = new ArrayList();
bool write = false;

if (string.IsNullOrEmpty(addExtension))
{
addExtension = string.Empty;
}
else if (!addExtension.StartsWith("."))
{
addExtension = "." + addExtension;
}

// extract the files from the temp file
try
{
fsTemp = UnzipToTempFile(lpZipFile, lpTempFile, result);
if (fsTemp != null)
{
while (fsTemp.Position != fsTemp.Length)
{
line = null;
while (string.IsNullOrEmpty(line) && fsTemp.Position != fsTemp.Length)
{
line = ReadLine(fsTemp);
}

if (!string.IsNullOrEmpty(line))
{
gzf = new GZipFileInfo();
if (gzf.ParseFileInfo(line) && gzf.Length > 0)
{
gzfs.Add(gzf);
lpFilePath = lpDestFolder + gzf.RelativePath;
lpFolder = GetFolder(lpFilePath);
gzf.LocalPath = lpFilePath;

write = false;
if (htFiles == null || htFiles.ContainsKey(gzf.RelativePath))
{
gzf.RestoreRequested = true;
write = writeFiles;
}

if (write)
{
// make sure the folder exists
if (!Directory.Exists(lpFolder))
{
Directory.CreateDirectory(lpFolder);
}

// read from fsTemp and write out the file
gzf.Restored = WriteFile(fsTemp, gzf.Length, lpFilePath + addExtension, bufferSize);
}
else
{
// need to advance fsTemp
fsTemp.Position += gzf.Length;
}
}
}
}
}
}
catch //(Exception ex3)
{
result.Errors = true;
}
finally
{
if (fsTemp != null)
{
fsTemp.Close();
fsTemp = null;
}
}

// delete the temp file
try
{
if (deleteTempFile)
{
File.Delete(lpTempFile);
result.TempFileDeleted = true;
}
}
catch //(Exception ex4)
{
result.Errors = true;
}

result.FileCount = gzfs.Count;
result.Files = new GZipFileInfo[gzfs.Count];
gzfs.CopyTo(result.Files);
return result;
}

private static string ReadLine(FileStream fs)
{
string line = string.Empty;

const int bufferSize = 4096;
byte[] buffer = new byte[bufferSize];
byte b = 0;
byte lf = 10;
int i = 0;

while (b != lf)
{
b = (byte)fs.ReadByte();
buffer[i] = b;
i++;
}

line = System.Text.Encoding.Default.GetString(buffer, 0, i - 1);

return line;
}

private static bool WriteFile(FileStream fs, int fileLength, string lpFile, int bufferSize)
{
bool success = false;
FileStream fsFile = null;

if (bufferSize == 0 || fileLength < bufferSize)
{
bufferSize = fileLength;
}

int count = 0;
int remaining = fileLength;
int readSize = 0;

try
{
byte[] buffer = new byte[bufferSize];
fsFile = new FileStream(lpFile, FileMode.Create, FileAccess.Write, FileShare.None);

while (remaining > 0)
{
if (remaining > bufferSize)
{
readSize = bufferSize;
}
else
{
readSize = remaining;
}

count = fs.Read(buffer, 0, readSize);
remaining -= count;

if (count == 0)
{
break;
}

fsFile.Write(buffer, 0, count);
fsFile.Flush();

}
fsFile.Flush();
fsFile.Close();
fsFile = null;

success = true;
}
catch //(Exception ex2)
{
success = false;
}
finally
{
if (fsFile != null)
{
fsFile.Flush();
fsFile.Close();
fsFile = null;
}
}
return success;
}

private static string GetFolder(string lpFilePath)
{
string lpFolder = lpFilePath;
int index = lpFolder.LastIndexOf("\\");
if (index != -1)
{
lpFolder = lpFolder.Substring(0, index + 1);
}
return lpFolder;
}

private static FileStream UnzipToTempFile(string lpZipFile, string lpTempFile, GZipResult result)
{
FileStream fsIn = null;
GZipStream gzip = null;
FileStream fsOut = null;
FileStream fsTemp = null;

const int bufferSize = 4096;
byte[] buffer = new byte[bufferSize];
int count = 0;

try
{
fsIn = new FileStream(lpZipFile, FileMode.Open, FileAccess.Read, FileShare.Read);
result.ZipFileSize = fsIn.Length;

fsOut = new FileStream(lpTempFile, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
gzip = new GZipStream(fsIn, CompressionMode.Decompress, true);
while (true)
{
count = gzip.Read(buffer, 0, bufferSize);
if (count != 0)
{
fsOut.Write(buffer, 0, count);
}
if (count != bufferSize)
{
break;
}
}
}
catch //(Exception ex1)
{
result.Errors = true;
}
finally
{
if (gzip != null)
{
gzip.Close();
gzip = null;
}
if (fsOut != null)
{
fsOut.Close();
fsOut = null;
}
if (fsIn != null)
{
fsIn.Close();
fsIn = null;
}
}

fsTemp = new FileStream(lpTempFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
if (fsTemp != null)
{
result.TempFileSize = fsTemp.Length;
}
return fsTemp;
}

private static int GetCompressionPercent(long tempLen, long zipLen)
{
double tmp = (double)tempLen;
double zip = (double)zipLen;
double hundred = 100;

double ratio = (tmp - zip) / tmp;
double pcnt = ratio * hundred;

return (int)pcnt;
}
}

public class GZipFileInfo
{
public int Index = 0;
public string RelativePath = null;
public DateTime ModifiedDate;
public int Length = 0;
public bool AddedToTempFile = false;
public bool RestoreRequested = false;
public bool Restored = false;
public string LocalPath = null;
public string Folder = null;

public bool ParseFileInfo(string fileInfo)
{
bool success = false;
try
{
if (!string.IsNullOrEmpty(fileInfo))
{
// get the file information
string[] info = fileInfo.Split(',');
if (info != null && info.Length == 4)
{
this.Index = Convert.ToInt32(info[0]);
this.RelativePath = info[1].Replace("/", "\\");
this.ModifiedDate = Convert.ToDateTime(info[2]);
this.Length = Convert.ToInt32(info[3]);
success = true;
}
}
}
catch
{
success = false;
}
return success;
}
}

public class GZipResult
{
public GZipFileInfo[] Files = null;
public int FileCount = 0;
public long TempFileSize = 0;
public long ZipFileSize = 0;
public int CompressionPercent = 0;
public string TempFile = null;
public string ZipFile = null;
public bool TempFileDeleted = false;
public bool Errors = false;

}