/// <summary>
/// Apply a content hash to the blob to verify upload and roundtrip consistency.
/// </summary>
/// <param name="blob">Cloud Blob</param>
/// <param name="stream">Stream value</param>
public void ApplyContentMd5Hash(ICloudBlob blob, Stream stream)
{
if (blob == null)
{
throw new ArgumentNullException(nameof(blob));
}
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
var hash = _cryptographyHelper.ComputeStreamMd5Hash(stream);
blob.FetchAttributesAsync(null, _blobRequestOptionsHelper.Get(), null).Wait();
// StorageClient does not provide a way to retrieve MD5 so we add our own MD5 check
// which let perform our own validation when downloading the blob
if (blob.Metadata.ContainsKey(METADATA_MD5_KEY))
{
blob.Metadata[METADATA_MD5_KEY] = hash;
}
else
{
blob.Metadata.Add(new KeyValuePair <string, string>(METADATA_MD5_KEY, hash));
}
blob.SetMetadataAsync().Wait();
}