protected static void PopulateContextWithUploadableRanges(FileInfo vhdFile, UploadContext context, bool resume)
{
using (var vds = new VirtualDiskStream(vhdFile.FullName))
{
IEnumerable <IndexRange> ranges = vds.Extents.Select(e => e.Range).ToArray();
var bs = new BufferedStream(vds);
if (resume)
{
var alreadyUploadedRanges = context.DestinationBlob.GetPageRangesAsync()
.ConfigureAwait(false).GetAwaiter().GetResult()
.Select(pr => new IndexRange(pr.StartOffset, pr.EndOffset));
ranges = IndexRange.SubstractRanges(ranges, alreadyUploadedRanges);
context.AlreadyUploadedDataSize = alreadyUploadedRanges.Sum(ir => ir.Length);
}
var uploadableRanges = IndexRangeHelper.ChunkRangesBySize(ranges, PageSizeInBytes).ToArray();
if (vds.DiskType == DiskType.Fixed)
{
var nonEmptyUploadableRanges = GetNonEmptyRanges(bs, uploadableRanges).ToArray();
context.UploadableDataSize = nonEmptyUploadableRanges.Sum(r => r.Length);
context.UploadableRanges = nonEmptyUploadableRanges;
}
else
{
context.UploadableDataSize = uploadableRanges.Sum(r => r.Length);
context.UploadableRanges = uploadableRanges;
}
}
}
public IEnumerable <IndexRange> GetEmptyRanges()
{
var blobRange = new List <IndexRange> {
IndexRange.FromLength(0, this.Length)
};
return(IndexRange.SubstractRanges(blobRange, GetPageRanges()));
}
