private void DoExtract(
IPreprocessingStepCallback callback,
string specificFileToExtract,
Func <PreprocessingStepParams, bool> onNext,
string password)
{
using (var zipFile = new ICSharpCode.SharpZipLib.Zip.ZipFile(@params.Location))
{
if (password != null)
{
zipFile.Password = password;
}
var entriesToEnum = specificFileToExtract != null?
Enumerable.Repeat(zipFile.GetEntry(specificFileToExtract), 1) : zipFile.OfType <ICSharpCode.SharpZipLib.Zip.ZipEntry>();
foreach (var entry in entriesToEnum.Where(e => e != null))
{
if (entry.IsDirectory)
{
continue;
}
if (entry.IsCrypted && password == null)
{
throw new PasswordException();
}
string entryFullPath = @params.FullPath + "\\" + entry.Name;
string tmpFileName = callback.TempFilesManager.GenerateNewName();
callback.SetStepDescription("Unpacking " + entryFullPath);
using (FileStream tmpFs = new FileStream(tmpFileName, FileMode.CreateNew))
using (var entryProgress = progressAggregator.CreateProgressSink())
{
using (var entryStream = zipFile.GetInputStream(entry))
{
var totalLen = entry.Size;
IOUtils.CopyStreamWithProgress(entryStream, tmpFs, pos =>
{
if (totalLen > 0)
{
callback.SetStepDescription($"Unpacking {pos * 100 / totalLen}%: {entryFullPath}");
entryProgress.SetValue((double)pos / totalLen);
}
}, callback.Cancellation);
}
}
if (!onNext(new PreprocessingStepParams(tmpFileName, entryFullPath,
@params.PreprocessingHistory.Add(new PreprocessingHistoryItem(name, entry.Name)))))
{
break;
}
}
}
}
