public override async Task <Stream> Decompress(StorageFile archive, StorageFolder location,
ReaderOptions options = null)
{
if (archive == null || location == null)
{
return(Stream.Null);
}
var compressorOptions = new CompressorOptions {
IsCompression = false
};
Stream archiveStream = null, progressStream = null, compressorStream = Stream.Null;
try
{
archiveStream = await archive.OpenStreamForReadAsync();
progressStream = new ProgressObservableStream(this, archiveStream);
compressorStream = GetCompressorStream(progressStream, compressorOptions);
var outputFileName = archive.Name.Substring(0, archive.Name.Length - archive.FileType.Length);
var file = await location.CreateFileAsync(outputFileName, CreationCollisionOption.GenerateUniqueName);
if (file == null)
{
return(Stream.Null); // file was not created
}
using (var outputStream = await file.OpenStreamForWriteAsync())
{
var bytes = new byte[DefaultBufferSize];
int readBytes;
while ((readBytes = compressorStream.Read(bytes, 0, bytes.Length)) > 0)
{
await outputStream.WriteAsync(bytes, 0, readBytes, Token);
}
}
await GZipOutputFileNameWorkaround(file, compressorStream);
}
finally
{
if (options != null && !options.LeaveStreamOpen)
{
archiveStream?.Dispose();
progressStream?.Dispose();
compressorStream.Dispose();
}
}
return(compressorStream);
}
public override async Task <Stream> Compress(IReadOnlyList <StorageFile> files, StorageFile archive,
StorageFolder location, WriterOptions options = null)
{
if (files.IsNullOrEmpty() | archive == null | location == null)
{
return(Stream.Null);
}
if (options == null)
{
options = GetWriterOptions();
options.LeaveStreamOpen = false;
}
Stream archiveStream = null, progressStream = Stream.Null;
try
{
archiveStream = await archive.OpenStreamForWriteAsync();
progressStream = new ProgressObservableStream(this, archiveStream);
using (var writer = WriterFactory.Open(progressStream, _type, options))
{
foreach (var file in files)
{
Token.ThrowIfCancellationRequested();
using (var inputStream = await file.OpenStreamForReadAsync())
{
await writer.WriteAsync(file.Name, inputStream, Token);
}
}
}
}
finally
{
if (!options.LeaveStreamOpen)
{
archiveStream?.Dispose();
progressStream.Dispose();
}
}
return(progressStream);
}
public override async Task <Stream> Compress(IReadOnlyList <StorageFile> files, StorageFile archive,
StorageFolder location, WriterOptions options = null)
{
if (files.IsNullOrEmpty() || archive == null || location == null)
{
return(Stream.Null);
}
var file = files[0]; // since multiple files are not supported
var compressorOptions = new CompressorOptions {
FileName = file.Name, IsCompression = true
};
Stream archiveStream = null, progressStream = null, compressorStream = Stream.Null;
try
{
archiveStream = await archive.OpenStreamForWriteAsync();
progressStream = new ProgressObservableStream(this, archiveStream);
compressorStream = GetCompressorStream(progressStream, compressorOptions);
using (var inputStream = await file.OpenStreamForReadAsync())
{
var bytes = new byte[DefaultBufferSize];
int readBytes;
while ((readBytes = inputStream.Read(bytes, 0, bytes.Length)) > 0)
{
await compressorStream.WriteAsync(bytes, 0, readBytes, Token);
}
}
}
finally
{
if (options != null && !options.LeaveStreamOpen)
{
archiveStream?.Dispose();
progressStream?.Dispose();
compressorStream.Dispose();
}
}
return(compressorStream);
}
public override async Task <Stream> Decompress(StorageFile archive, StorageFolder location,
IReadOnlyList <FileEntry> entries, ReaderOptions options = null)
{
if (archive == null || entries.IsNullOrEmpty() || location == null)
{
return(Stream.Null);
}
options = options ?? new ReaderOptions {
LeaveStreamOpen = false
};
Stream archiveStream = null, progressStream = Stream.Null;
try
{
archiveStream = await archive.OpenStreamForReadAsync();
progressStream = new ProgressObservableStream(this, archiveStream);
using (var reader = ReaderFactory.Open(progressStream, options))
{
while (reader.MoveToNextEntry())
{
Token.ThrowIfCancellationRequested();
if (entries.Any(entry => reader.Entry.Key.Equals(entry.Key)))
{
await WriteEntry(reader, location);
}
}
}
}
finally
{
if (!options.LeaveStreamOpen)
{
archiveStream?.Dispose();
progressStream.Dispose();
}
}
return(progressStream);
}
