I posted my compression helper class before and realised almost instantly that it suffered from 'legacy lag' - so it'd been changed so much over the months that it was really bad! Anyway, presented below is a modified version of that class (which I've also tried out my new formatting scheme on) as a reminder, it's just a simple wrapper around SharpZipLib.
using System;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib;
namespace SerializableJob.Compression
{
public enum CompressionType
{
GZip,
BZip2,
Zip
}
public class Compression
{
public static CompressionType CompressionProvider = CompressionType.GZip;
private static Stream OutputStream(Stream inputStream)
{
switch(CompressionProvider)
{
case CompressionType.BZip2:
return new ICSharpCode.SharpZipLib.BZip2.BZip2OutputStream(inputStream);
case CompressionType.GZip:
return new ICSharpCode.SharpZipLib.GZip.GZipOutputStream(inputStream);
case CompressionType.Zip:
return new ICSharpCode.SharpZipLib.Zip.ZipOutputStream(inputStream);
default:
return new ICSharpCode.SharpZipLib.GZip.GZipOutputStream(inputStream);
}
}
private static Stream InputStream(Stream inputStream)
{
switch(CompressionProvider)
{
case CompressionType.BZip2:
return new ICSharpCode.SharpZipLib.BZip2.BZip2InputStream(inputStream);
case CompressionType.GZip:
return new ICSharpCode.SharpZipLib.GZip.GZipInputStream(inputStream);
case CompressionType.Zip:
return new ICSharpCode.SharpZipLib.Zip.ZipInputStream(inputStream);
default:
return new ICSharpCode.SharpZipLib.GZip.GZipInputStream(inputStream);
}
}
public static byte[] Compress(byte[] bytesToCompress)
{
MemoryStream ms = new MemoryStream();
Stream s = OutputStream(ms);
s.Write(bytesToCompress,0, bytesToCompress.Length);
s.Close();
return ms.ToArray();
}
public static string Compress(string stringToCompress)
{
byte[] compressedData = CompressToByte(stringToCompress);
string strOut = Convert.ToBase64String(compressedData);
return strOut;
}
public static byte[] CompressToByte(string stringToCompress)
{
byte[] bytData = Encoding.Unicode.GetBytes(stringToCompress);
return Compress(bytData);;
}
public string DeCompress(string stringToDecompress)
{
string outString = string.Empty;
if (stringToDecompress == null)
{
throw new ArgumentNullException("stringToDecompress","You tried to use an empty string");
}
try
{
byte[] inArr = Convert.FromBase64String(stringToDecompress.Trim());
outString = System.Text.Encoding.Unicode.GetString(DeCompress(inArr));
}
catch (NullReferenceException nEx)
{
return nEx.Message;
}
return outString;
}
public static byte[] DeCompress(byte[] bytesToDecompress)
{
byte[] writeData = new byte[4096];
Stream s2 = InputStream(new MemoryStream(bytesToDecompress));
MemoryStream outStream = new MemoryStream();
while(true)
{
int size = s2.Read(writeData,0,writeData.Length);
if(size>0)
{
outStream.Write(writeData,0,size);
}
else
{
break;
}
}
s2.Close();
byte[] outArr = outStream.ToArray();
outStream.Close();
return outArr;
}
}
} ?>
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