/// <summary>
/// Compress multiple items with the ZIP algorithm.
/// </summary>
/// <param name="infos">The items to compress.</param>
/// <param name="progress1">The progress1.</param>
/// <param name="progress2">The progress2.</param>
/// <param name="destinationStream">The destination stream.</param>
/// <returns></returns>
private static Stream CompressHeterogenousToStream(
CompressHeterogenousInfos infos,
ICancelableProgress progress1,
Cancelable progress2,
Stream destinationStream )
{
if ( infos == null ||
infos.InternalItems == null ||
infos.InternalItems.Count <= 0 )
{
return null;
}
else
{
// No "using" block.
ZipOutputStream zip = new ZipOutputStream( destinationStream );
Crc32 crc = new Crc32();
zip.SetLevel( 9 ); // 0..9.
int index = 1;
foreach ( CompressHeterogenousInfo info
in infos.InternalItems )
{
// Cancel, if requested.
if ( progress1 != null )
{
if ( progress1.OnProgress( null, EventArgs.Empty ) ==
CancelMode.Cancel )
{
return null;
}
}
// Cancel, if requested.
if ( progress2 != null )
{
if ( progress2( info ) == CancelMode.Cancel )
{
return null;
}
}
// --
byte[] buffer = null;
string fileName = null;
bool putEntry;
switch ( info.Type )
{
case CompressHeterogenousInfo.InfoType.String:
fileName = info.FilePath;
if ( fileName == null || fileName.Length <= 0 )
{
fileName =
string.Format(
@"file{0}.bin",
index );
}
buffer = Encoding.UTF8.GetBytes( info.Content );
putEntry = true;
break;
case CompressHeterogenousInfo.InfoType.File:
fileName = Path.GetFileName( info.FilePath );
ZipEntry entry = new ZipEntry( fileName );
zip.PutNextEntry( entry );
using ( FileStream fs = new FileStream(
info.FilePath,
FileMode.Open,
FileAccess.Read,
FileShare.Read ) )
using ( BinaryReader r = new BinaryReader( fs ) )
{
byte[] smallBuffer = new byte[16384];
int bytesRead;
do
{
bytesRead = r.Read(
smallBuffer,
0,
smallBuffer.Length );
zip.Write( smallBuffer, 0, bytesRead );
// --
// Cancel, if requested.
if ( progress1 != null )
{
if ( progress1.OnProgress(
null,
EventArgs.Empty ) ==
CancelMode.Cancel )
{
return null;
}
}
// Cancel, if requested.
if ( progress2 != null )
{
if ( progress2( info ) ==
CancelMode.Cancel )
{
return null;
}
}
}
while ( bytesRead > 0 );
}
putEntry = false;
break;
case CompressHeterogenousInfo.InfoType.Bytes:
fileName = info.FilePath;
if ( fileName == null ||
fileName.Length <= 0 )
{
fileName =
string.Format(
@"file{0}.bin",
index );
}
buffer = info.Bytes;
putEntry = true;
break;
default:
Debug.Assert(
false,
string.Format(
@"Unknown compression info type '{0}'.",
info.Type ) );
putEntry = false;
break;
}
// --
if ( putEntry )
{
ZipEntry entry = new ZipEntry( fileName );
entry.DateTime = DateTime.Now;
entry.Size = buffer.Length;
crc.Reset();
crc.Update( buffer );
entry.Crc = crc.Value;
zip.PutNextEntry( entry );
zip.Write( buffer, 0, buffer.Length );
}
index++;
}
zip.Finish();
return zip;
}
}
/// <summary>
/// Compress multiple items with the ZIP algorithm.
/// </summary>
/// <param name="infos">The items to compress.</param>
/// <returns>Returns the compressed items.</returns>
public static byte[] CompressHeterogenous(
CompressHeterogenousInfos infos )
{
if ( infos == null ||
infos.InternalItems == null ||
infos.InternalItems.Count <= 0 )
{
return null;
}
else
{
using ( MemoryStream buf = new MemoryStream() )
using ( ZipOutputStream zip = new ZipOutputStream( buf ) )
{
Crc32 crc = new Crc32();
zip.SetLevel( 9 ); // 0..9.
int index = 1;
foreach ( CompressHeterogenousInfo info in infos.InternalItems )
{
byte[] buffer = null;
string fileName = null;
switch ( info.Type )
{
case CompressHeterogenousInfo.InfoType.String:
{
fileName = info.FilePath;
if ( fileName == null || fileName.Length <= 0 )
{
fileName =
string.Format(
@"file{0}.bin",
index );
}
buffer = Encoding.UTF8.GetBytes( info.Content );
}
break;
case CompressHeterogenousInfo.InfoType.File:
{
using ( FileStream fs = new FileStream(
info.FilePath,
FileMode.Open,
FileAccess.Read,
FileShare.Read ) )
using ( BinaryReader r = new BinaryReader( fs ) )
{
buffer = new byte[fs.Length];
fs.Read( buffer, 0, buffer.Length );
fileName = Path.GetFileName( info.FilePath );
}
}
break;
case CompressHeterogenousInfo.InfoType.Bytes:
{
fileName = info.FilePath;
if ( fileName == null ||
fileName.Length <= 0 )
{
fileName =
string.Format(
@"file{0}.bin",
index );
}
buffer = info.Bytes;
}
break;
default:
Debug.Assert(
false,
string.Format(
@"Unknown compression info type '{0}'.",
info.Type ) );
break;
}
ZipEntry entry = new ZipEntry( fileName );
entry.DateTime = DateTime.Now;
entry.Size = buffer.Length;
crc.Reset();
crc.Update( buffer );
entry.Crc = crc.Value;
zip.PutNextEntry( entry );
zip.Write( buffer, 0, buffer.Length );
index++;
}
zip.Finish();
// --
byte[] c = new byte[buf.Length];
buf.Seek( 0, SeekOrigin.Begin );
buf.Read( c, 0, c.Length );
// --
zip.Close();
return c;
}
}
}
/// <summary>
/// Compress multiple items with the ZIP algorithm.
/// </summary>
/// <param name="infos">The items to compress.</param>
/// <param name="progress1">The progress1.</param>
/// <param name="progress2">The progress2.</param>
/// <param name="destinationFilePath">The destination file path.</param>
private static void CompressHeterogenousToFile(
CompressHeterogenousInfos infos,
ICancelableProgress progress1,
Cancelable progress2,
FileInfo destinationFilePath )
{
if ( destinationFilePath.Exists )
{
destinationFilePath.Delete();
}
using ( FileStream destinationStream = new FileStream(
destinationFilePath.FullName,
FileMode.OpenOrCreate,
FileAccess.ReadWrite ) )
{
Stream realStream =
CompressHeterogenousToStream(
infos,
progress1,
progress2,
destinationStream );
if ( realStream != null )
{
realStream.Dispose();
}
}
}
/// <summary>
/// Compress multiple items with the ZIP algorithm.
/// </summary>
/// <param name="infos">The items to compress.</param>
/// <param name="progress">The progress.</param>
/// <param name="destinationFilePath">The destination file path.</param>
public static void CompressHeterogenousToFile(
CompressHeterogenousInfos infos,
Cancelable progress,
FileInfo destinationFilePath )
{
CompressHeterogenousToFile(
infos,
null,
progress,
destinationFilePath );
}
/// <summary>
/// Compress multiple items with the ZIP algorithm.
/// </summary>
/// <param name="infos">The items to compress.</param>
/// <param name="progress1">The progress1.</param>
/// <param name="progress2">The progress2.</param>
/// <returns>Returns the compressed items.</returns>
private static byte[] CompressHeterogenous(
CompressHeterogenousInfos infos,
ICancelableProgress progress1,
Cancelable progress2 )
{
using ( MemoryStream destinationStream = new MemoryStream() )
{
Stream realStream = CompressHeterogenousToStream(
infos,
progress1,
progress2,
destinationStream );
if ( realStream == null )
{
return null;
}
else
{
using ( realStream )
{
byte[] c = new byte[destinationStream.Length];
destinationStream.Seek( 0, SeekOrigin.Begin );
destinationStream.Read( c, 0, c.Length );
return c;
}
}
}
}
/// <summary>
/// Compress multiple items with the ZIP algorithm.
/// </summary>
/// <param name="infos">The items to compress.</param>
/// <param name="progress">The progress.</param>
/// <returns>Returns the compressed items.</returns>
public static byte[] CompressHeterogenous(
CompressHeterogenousInfos infos,
Cancelable progress )
{
return CompressHeterogenous( infos, null, progress );
}
/// <summary>
/// Compress multiple items with the ZIP algorithm.
/// </summary>
/// <param name="infos">The items to compress.</param>
/// <returns>Returns the compressed items.</returns>
public static byte[] CompressHeterogenous(
CompressHeterogenousInfos infos )
{
return CompressHeterogenous( infos, null, null );
}
