/// <summary>
/// Unpacks a set of archives into a given directory.
/// </summary>
protected void UnpackArchives(IEnumerable <string> archivesToUnpack, string unpackDirectory)
{
foreach (string archiveToUnpack in archivesToUnpack)
{
if (request.Target.IsDirectory)
{
// When the target is a nested archive, we need to unpack it to a subdirectory.
unpackDirectory = Path.Combine(unpackDirectory, Path.GetFileNameWithoutExtension(archiveToUnpack));
}
// Extract archive.
var unzipStrategy = new UnzipStrategy
{
UnzipNestedArchives = true,
WhitelistPattern = LogsharkConstants.EXTRACTION_FILE_WHITELIST,
BlacklistPatterns = LogsharkConstants.EXTRACTION_FILE_BLACKLISTS
};
var unzipper = new LogsetUnzipper(unzipStrategy, request);
UnzipResult result = unzipper.Unzip(archiveToUnpack, unpackDirectory, deleteOnFinish: request.Target.IsDirectory);
// Update target size to include the size of the zip contents (but not the zip itself if it's a nested zip in a directory).
request.Target.UncompressedSize += result.FullUncompressedSize;
if (request.Target.IsDirectory)
{
request.Target.UncompressedSize -= result.CompressedSize;
}
}
}
/// <summary>
/// Extract the contents of a zip to a destination directory.
/// </summary>
protected UnzipResult ExtractZipContents(ZipFile zipFile, string zipName, string destinationDirectory)
{
UnzipResult result = new UnzipResult();
foreach (ZipEntry zipEntry in zipFile)
{
if (zipEntry.IsFile)
{
result.FullUncompressedFileCount++;
result.FullUncompressedSize += zipEntry.Size;
}
if (QualifiesForExtraction(zipEntry, destinationDirectory))
{
bool isItemAnArchive = IsSupportedArchiveType(zipEntry);
if (isItemAnArchive)
{
Log.InfoFormat("Extracting nested archive '{0}' from '{1}'.. ({2})", Path.GetFileName(zipEntry.Name),
zipName, zipEntry.CompressedSize.ToPrettySize(decimalPlaces: 1));
}
string extractedItemLocation = ExtractFileFromZip(zipFile, zipEntry, destinationDirectory);
result.ExtractedFileCount++;
result.ExtractedSize += zipEntry.Size;
if (isItemAnArchive && Strategy.UnzipNestedArchives)
{
string destinationSubDirectory = Path.Combine(destinationDirectory, Path.GetFileNameWithoutExtension(zipEntry.Name));
UnzipResult nestedResult = ExtractArchive(extractedItemLocation, destinationSubDirectory, deleteOnFinish: true);
// Combine tallied metrics with those of nested result.
result.FullUncompressedFileCount += nestedResult.FullUncompressedFileCount - 1;
result.FullUncompressedSize += nestedResult.FullUncompressedSize - zipEntry.Size;
result.ExtractedFileCount += nestedResult.ExtractedFileCount - 1;
result.ExtractedSize += nestedResult.ExtractedSize - zipEntry.Size;
}
}
}
return(result);
}
/// <summary>
/// Extracts a .zip archive and tallies the work done.
/// </summary>
protected UnzipResult ExtractZip(Stream zipStream, string zipName, string destinationDirectory)
{
ZipFile zipFile = new ZipFile(zipStream)
{
IsStreamOwner = true
};
try
{
UnzipResult result = ExtractZipContents(zipFile, zipName, destinationDirectory);
result.CompressedSize = zipFile.Cast <ZipEntry>().Sum(zipEntry => zipEntry.CompressedSize);
Log.InfoFormat("Extracted {0} files from '{1}'. ({2} unpacked)", result.ExtractedFileCount, zipName, result.ExtractedSize.ToPrettySize(decimalPlaces: 1));
return(result);
}
finally
{
zipFile.Close();
}
}