public static async Task ExtractArchive(BaseStorageFile archive, BaseStorageFolder destinationFolder, IProgress <float> progressDelegate, CancellationToken cancellationToken)
{
ZipFile zipFile = await Filesystem.FilesystemTasks.Wrap(async() => new ZipFile(await archive.OpenStreamForReadAsync()));
if (zipFile == null)
{
return;
}
using (zipFile)
{
zipFile.IsStreamOwner = true;
List <ZipEntry> directoryEntries = new List <ZipEntry>();
List <ZipEntry> fileEntries = new List <ZipEntry>();
foreach (ZipEntry entry in zipFile)
{
if (entry.IsFile)
{
fileEntries.Add(entry);
}
else
{
directoryEntries.Add(entry);
}
}
if (cancellationToken.IsCancellationRequested) // Check if cancelled
{
return;
}
var wnt = new WindowsNameTransform(destinationFolder.Path);
var zipEncoding = ZipStorageFolder.DetectFileEncoding(zipFile);
var directories = new List <string>();
try
{
directories.AddRange(directoryEntries.Select((entry) => wnt.TransformDirectory(ZipStorageFolder.DecodeEntryName(entry, zipEncoding))));
directories.AddRange(fileEntries.Select((entry) => Path.GetDirectoryName(wnt.TransformFile(ZipStorageFolder.DecodeEntryName(entry, zipEncoding)))));
}
catch (InvalidNameException ex)
{
App.Logger.Warn(ex, $"Error transforming zip names into: {destinationFolder.Path}\n" +
$"Directories: {string.Join(", ", directoryEntries.Select(x => x.Name))}\n" +
$"Files: {string.Join(", ", fileEntries.Select(x => x.Name))}");
return;
}
foreach (var dir in directories.Distinct().OrderBy(x => x.Length))
{
if (!NativeFileOperationsHelper.CreateDirectoryFromApp(dir, IntPtr.Zero))
{
var dirName = destinationFolder.Path;
foreach (var component in dir.Substring(destinationFolder.Path.Length).Split(Path.DirectorySeparatorChar, StringSplitOptions.RemoveEmptyEntries))
{
dirName = Path.Combine(dirName, component);
NativeFileOperationsHelper.CreateDirectoryFromApp(dirName, IntPtr.Zero);
}
}
if (cancellationToken.IsCancellationRequested) // Check if canceled
{
return;
}
}
if (cancellationToken.IsCancellationRequested) // Check if canceled
{
return;
}
// Fill files
byte[] buffer = new byte[4096];
int entriesAmount = fileEntries.Count;
int entriesFinished = 0;
foreach (var entry in fileEntries)
{
if (cancellationToken.IsCancellationRequested) // Check if canceled
{
return;
}
if (entry.IsCrypted)
{
App.Logger.Info($"Skipped encrypted zip entry: {entry.Name}");
continue; // TODO: support password protected archives
}
string filePath = wnt.TransformFile(ZipStorageFolder.DecodeEntryName(entry, zipEncoding));
var hFile = NativeFileOperationsHelper.CreateFileForWrite(filePath);
if (hFile.IsInvalid)
{
return; // TODO: handle error
}
// We don't close hFile because FileStream.Dispose() already does that
using (FileStream destinationStream = new FileStream(hFile, FileAccess.Write))
{
int currentBlockSize = 0;
using (Stream entryStream = zipFile.GetInputStream(entry))
{
while ((currentBlockSize = await entryStream.ReadAsync(buffer, 0, buffer.Length)) > 0)
{
await destinationStream.WriteAsync(buffer, 0, currentBlockSize);
if (cancellationToken.IsCancellationRequested) // Check if cancelled
{
return;
}
}
}
}
entriesFinished++;
float percentage = (float)((float)entriesFinished / (float)entriesAmount) * 100.0f;
progressDelegate?.Report(percentage);
}
}
}
public static async Task ExtractArchive(StorageFile archive, StorageFolder destinationFolder, IProgress <float> progressDelegate, CancellationToken cancellationToken)
{
using (ZipFile zipFile = new ZipFile(await archive.OpenStreamForReadAsync()))
{
zipFile.IsStreamOwner = true;
List <ZipEntry> directoryEntries = new List <ZipEntry>();
List <ZipEntry> fileEntries = new List <ZipEntry>();
foreach (ZipEntry entry in zipFile)
{
if (entry.IsFile)
{
fileEntries.Add(entry);
}
else
{
directoryEntries.Add(entry);
}
}
if (cancellationToken.IsCancellationRequested) // Check if cancelled
{
return;
}
var wnt = new WindowsNameTransform(destinationFolder.Path);
var directories = new List <string>();
directories.AddRange(directoryEntries.Select((item) => wnt.TransformDirectory(item.Name)));
directories.AddRange(fileEntries.Select((item) => Path.GetDirectoryName(wnt.TransformFile(item.Name))));
foreach (var dir in directories.Distinct().OrderBy(x => x.Length))
{
if (!NativeFileOperationsHelper.CreateDirectoryFromApp(dir, IntPtr.Zero))
{
var dirName = destinationFolder.Path;
foreach (var component in dir.Substring(destinationFolder.Path.Length).Split(Path.DirectorySeparatorChar, StringSplitOptions.RemoveEmptyEntries))
{
dirName = Path.Combine(dirName, component);
NativeFileOperationsHelper.CreateDirectoryFromApp(dirName, IntPtr.Zero);
}
}
}
if (cancellationToken.IsCancellationRequested) // Check if cancelled
{
return;
}
// Fill files
byte[] buffer = new byte[4096];
int entriesAmount = fileEntries.Count;
int entriesFinished = 0;
foreach (var entry in fileEntries)
{
if (cancellationToken.IsCancellationRequested) // Check if cancelled
{
return;
}
string filePath = wnt.TransformFile(entry.Name);
var hFile = NativeFileOperationsHelper.CreateFileForWrite(filePath);
if (hFile.IsInvalid)
{
return; // TODO: handle error
}
using (FileStream destinationStream = new FileStream(hFile, FileAccess.ReadWrite))
{
int currentBlockSize = 0;
using (Stream entryStream = zipFile.GetInputStream(entry))
{
while ((currentBlockSize = await entryStream.ReadAsync(buffer, 0, buffer.Length)) > 0)
{
await destinationStream.WriteAsync(buffer, 0, buffer.Length);
if (cancellationToken.IsCancellationRequested) // Check if cancelled
{
return;
}
}
}
}
// We don't close handleContext because FileStream.Dispose() already does that
entriesFinished++;
float percentage = (float)((float)entriesFinished / (float)entriesAmount) * 100.0f;
progressDelegate?.Report(percentage);
}
}
}
