/// <returns>New ETag</returns>
private string WriteToStream(MetadataPrefixStream stream, object item, Type type, IDataSerializer serializer = null)
{
byte[] result;
using (var resultStream = new MemoryStream())
{
(serializer ?? _defaultSerializer).Serialize(item, resultStream, type);
result = resultStream.ToArray();
}
stream.Seek(0, SeekOrigin.Begin);
stream.Write(result, 0, result.Length);
stream.SetLength(result.Length);
stream.Seek(0, SeekOrigin.Begin);
return(stream.WriteNewETag());
}
private string WriteToStream(MetadataPrefixStream stream, Stream item)
{
byte[] result;
using (var resultStream = new MemoryStream())
{
item.Position = 0;
item.CopyTo(resultStream);
result = resultStream.ToArray();
}
stream.Seek(0, SeekOrigin.Begin);
stream.Write(result, 0, result.Length);
stream.SetLength(result.Length);
stream.Seek(0, SeekOrigin.Begin);
return(stream.WriteNewETag());
}
public Maybe <Stream> GetBlobStream(string containerName, string blobName, out string etag)
{
var path = Path.Combine(_root, containerName, blobName);
try
{
var file = new FileInfo(path);
if (!file.Exists)
{
etag = null;
return(Maybe <Stream> .Empty);
}
using (var stream = file.OpenRead())
using (var epStream = new MetadataPrefixStream(stream))
{
etag = epStream.ReadETag();
int length = (int)epStream.Length;
epStream.Seek(0, SeekOrigin.Begin);
var returnStream = new MemoryStream(length);
byte[] buffer = new byte[8192];
int bytesRead = 1;
while (length > 0 && bytesRead > 0)
{
bytesRead = epStream.Read(buffer, 0, Math.Min(length, buffer.Length));
returnStream.Write(buffer, 0, bytesRead);
length -= bytesRead;
}
returnStream.Position = 0;
return(new Maybe <Stream>(returnStream));
}
}
catch (FileNotFoundException)
{
etag = null;
return(Maybe <Stream> .Empty);
}
catch (DirectoryNotFoundException)
{
etag = null;
return(Maybe <Stream> .Empty);
}
}