public void TestCompressDecompress()
{
// get the bytes
byte[] bytes = ExtractTestFolio123();
Assert.IsFalse( bytes.Length == 0, "no bytes read or returned" );
// and compress them
byte[] compressedBytes = null;
using ( MemoryStream ms = new MemoryStream() )
{
using ( ZipOutputStream zos = new ZipOutputStream( ms ) )
{
zos.SetLevel(9); // max compression
// add an entry
zos.PutNextEntry( new ZipEntry( "test" ) );
zos.Write( bytes, 0, bytes.Length );
}
compressedBytes = ms.ToArray();
}
// and decompress
// and compare the returned bytes against the original bytes
byte[] uncompressedBytes = null;
using ( MemoryStream ms = new MemoryStream( compressedBytes ) )
{
// decompress the file
using ( ZipInputStream zis = new ZipInputStream( ms ) )
{
// should only be on entry per file
ZipEntry entry = zis.GetNextEntry();
uncompressedBytes = new byte[ entry.Size ];
zis.Read( uncompressedBytes, 0, (int)entry.Size );
}
}
// and compare them
Assert.AreEqual( bytes.Length, uncompressedBytes.Length, "byte lengths are different" );
for ( int i=0; i < bytes.Length; ++i )
{
Assert.AreEqual( bytes[i], uncompressedBytes[i], "bytes differ at position " + i );
}
}
public static byte[] TryCompressByteStream(byte[] bytes)
{
byte[] compressedBytes = null;
using (MemoryStream ms = new MemoryStream())
{
using (ZipOutputStream zos = new ZipOutputStream(ms))
{
zos.SetLevel(9); // max compression
// add an entry
zos.PutNextEntry(new ZipEntry("test"));
zos.Write(bytes, 0, bytes.Length);
}
compressedBytes = ms.ToArray();
}
return compressedBytes;
}
/// <summary>
/// Zips and compresses files.
/// You should give the full path for the zipFileName.
/// You should give the full path for the rootDirectoryName.
/// You should give relative path for the names of the files to zip. Relative to the root
/// Example: ZipCompressUtility.TryZipAndCompressFiles( "C:\Aucent\Folio1.zip",
/// "C:\DirectoryWithHtmlFiles\Folio1",
/// new string[]{"index.html", "DependentHoppers\hopper.html"} );
/// </summary>
/// <param name="zipFileName">Set to the name that you want the zip file to be. (e.g. C:\Aucent\SalesFolio.zip)</param>
/// <param name="rootDirectoryName">The root directory to start looking for files and directories in.</param>
/// <param name="filesToZip">List of all the files you want to zip.</param>
/// <returns></returns>
public static bool TryZipAndCompressFiles(string zipFileName, string rootDirectoryName, string[] filesToZip)
{
bool ok = false;
using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFileName)))
{
try
{
if (rootDirectoryName[rootDirectoryName.Length - 1] != Path.DirectorySeparatorChar)
{
// append directory separator char
rootDirectoryName += Path.DirectorySeparatorChar;
}
s.SetLevel(9); // 0 - store only to 9 - means best compression
if (filesToZip != null)
{
foreach (string file in filesToZip)
{
byte[] buffer = FileUtilities.ReadFileToByteArray(rootDirectoryName + file);
if (buffer != null)
{
ZipEntry entry = new ZipEntry(file);
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
}
ok = true;
}
catch
{
ok = false;
}
}
return ok;
}