private async Task <HttpContent> GetStoredHttpContentAsync(string rowKey, IEnumerable <KeyValuePair <string, IEnumerable <string> > > headers, bool isCompressed, CancellationToken cancellationToken)
{
ICloudBlockBlob blob = _blobContainer.GetBlockBlobReference(rowKey);
Stream stream = await blob.OpenReadAsync(cancellationToken);
if (isCompressed)
{
stream = new GZipStream(stream, CompressionMode.Decompress);
}
var httpContent = new StreamContent(stream);
httpContent.Headers.AddRange(headers);
return(httpContent);
}
private async Task <MagickImage> OpenImageAsync(ICloudBlockBlob input, CancellationToken cancellationToken, ILogger logger, Stopwatch sw)
{
// Magick.NET doesn't read from the blob stream correctly, so we download the entire blob first to a buffer and read from there.
// The buffer only exists for a short period in this scope, lessening memory pressure.
byte[] buffer;
using (var inputStream = await input.OpenReadAsync(cancellationToken))
{
logger.Info("OpenStream: " + sw.ElapsedMilliseconds);
buffer = new byte[inputStream.Length];
using (var ms = new MemoryStream(buffer))
{
await inputStream.CopyToAsync(ms, buffer.Length, cancellationToken);
}
logger.Info("ReadData: " + sw.ElapsedMilliseconds);
}
return(new MagickImage(buffer));
}
