/// <summary>
/// Loads the content from another data transfer object.
/// </summary>
/// <param name="source">The content source.</param>
/// <param name="token">The token that can be used to cancel the operation.</param>
/// <returns>The task representing asynchronous state of content loading.</returns>
/// <exception cref="OperationCanceledException">The operation has been canceled.</exception>
/// <exception cref="NotSupportedException">The underlying stream does not support seeking.</exception>
public async ValueTask LoadFromAsync(IDataTransferObject source, CancellationToken token = default)
{
if (content.CanSeek && content.CanWrite)
{
try
{
await source.WriteToAsync(content, token : token).ConfigureAwait(false);
}
finally
{
content.Seek(0, SeekOrigin.Begin);
}
}
else
{
throw new NotSupportedException();
}
}
ValueTask IBufferedMessage.LoadFromAsync(IDataTransferObject source, CancellationToken token) => source.WriteToAsync(this, BufferSize, token);
