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)
{
// handle or display the error
throw ex1;
}
finally
{
if (gzip != null)
{
gzip.Close();
gzip = null;
}
if (fsOut != null)
{
fsOut.Close();
fsOut = null;
}
if (fsIn != null)
{
fsIn.Close();
fsIn = null;
}
}
}
/// <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)
{
var result = new GZipResult();
if (!lpDestFolder.EndsWith("\\"))
{
lpDestFolder += "\\";
}
string lpTempFile = lpDestFolder + zipFileName + ".tmp";
string lpZipFile = lpDestFolder + zipFileName;
result.TempFile = lpTempFile;
result.ZipFile = lpZipFile;
int fileCount = 0;
if (files != null && files.Length > 0)
{
CreateTempFile(files, lpBaseFolder, lpTempFile, result);
if (result.FileCount > 0)
{
CreateZipFile(lpTempFile, lpZipFile, result);
}
// delete the temp file
try
{
if (deleteTempFile)
{
File.Delete(lpTempFile);
result.TempFileDeleted = true;
}
}
catch (Exception ex4)
{
// handle or display the error
throw ex4;
}
}
return(result);
}
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;
var 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.None);
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)
//{
// // handle or display the error
// throw ex1;
//}
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.None);
if (fsTemp != null)
{
result.TempFileSize = fsTemp.Length;
}
return(fsTemp);
}
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;
GZippedFile gzf = null;
FileStream fsOut = null;
FileStream fsIn = null;
if (files != null && files.Length > 0)
{
try
{
result.Files = new GZippedFile[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 GZippedFile();
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)
{
// handle or display the error
throw ex1;
}
finally
{
if (fsIn != null)
{
fsIn.Close();
fsIn = null;
}
}
if (fsOut != null)
{
result.TempFileSize = fsOut.Length;
}
}
}
catch (Exception ex2)
{
// handle or display the error
throw ex2;
}
finally
{
if (fsOut != null)
{
fsOut.Close();
fsOut = null;
}
}
}
result.FileCount = fileIndex;
}
public static GZipResult Decompress(string lpZipFile, string lpDestFolder, bool deleteTempFile)
{
var result = new GZipResult();
if (!lpDestFolder.EndsWith("\\"))
{
lpDestFolder += "\\";
}
if (!Directory.Exists(lpDestFolder))
{
Directory.CreateDirectory(lpDestFolder);
}
string lpTempFile = lpDestFolder + Path.GetFileName(lpZipFile) + ".tmp";
result.TempFile = lpTempFile;
result.ZipFile = lpZipFile;
string line = null;
string lpFilePath = null;
GZippedFile gzf = null;
FileStream fsTemp = null;
var gzfs = new ArrayList();
// 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 = GZippedFile.GetGZippedFile(line);
if (gzf != null && gzf.Length > 0)
{
gzfs.Add(gzf);
lpFilePath = lpDestFolder + gzf.RelativePath;
gzf.LocalPath = lpFilePath;
WriteFile(fsTemp, gzf.Length, lpFilePath);
gzf.Restored = true;
}
}
}
}
}
//catch (Exception ex3)
//{
// // handle or display the error
// throw ex3;
//}
finally
{
if (fsTemp != null)
{
fsTemp.Close();
fsTemp = null;
}
}
// delete the temp file
try
{
if (deleteTempFile)
{
File.Delete(lpTempFile);
result.TempFileDeleted = true;
}
}
catch (Exception ex4)
{
// handle or display the error
throw ex4;
}
result.FileCount = gzfs.Count;
gzfs.CopyTo(result.Files);
return(result);
}
