public IEnumerable <IShape> Load(Stream stream)
{
using (var unwrappedStream = wrapper_.Unwrap(stream))
{
return(loader_.Load(unwrappedStream));
}
}
private ICollection <IShape> LoadShapesFromStream(IShapeLoader shapeLoader, Stream stream)
{
try
{
return(shapeLoader.Load(stream).ToList());
}
catch (Exception ex)
{
errorLabel.Text = ex.Message;
return(null);
}
}
public IEnumerable <IShape> Load(Stream stream)
{
using (var archive = new ZipArchive(stream, ZipArchiveMode.Read, true))
{
var entry = archive.Entries.FirstOrDefault();
if (entry == null)
{
throw new ArgumentException("The package is invalid");
}
using (Stream zipStream = entry.Open())
{
return(loader_.Load(zipStream));
}
}
}
public IEnumerable <IShape> Load(Stream stream)
{
var hash = new byte[hash_.ByteLength];
stream.Read(hash, 0, hash.Length);
using (var memoryStream = new MemoryStream())
{
// TODO?: reset position in memoryStream
stream.CopyTo(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
var actualHash = hash_.Compute(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
if (!AreHashesEqual(hash, actualHash))
{
throw new ArgumentException("The file is corrupted.");
}
return(loader_.Load(memoryStream));
}
}