/// <summary>
/// Initiates the asynchronous execution of the OpenStream operation.
/// <seealso cref="M:Amazon.S3.Transfer.TransferUtility.Upload"/>
/// </summary>
/// <param name="request">
/// Contains all the parameters used for opening a stream to an S3 object.
/// </param>
/// <param name="callback">An AsyncCallback delegate that is invoked when the operation completes.</param>
/// <param name="state">A user-defined state object that is passed to the callback procedure. Retrieve this object from within the callback procedure using the AsyncState property.</param>
/// <exception cref="T:System.ArgumentNullException"></exception>
/// <exception cref="T:System.Net.WebException"></exception>
/// <exception cref="T:Amazon.S3.AmazonS3Exception"></exception>
/// <returns>An IAsyncResult that can be used to poll or wait for results, or both;
/// this value is also needed when invoking EndOpenStream.</returns>
public IAsyncResult BeginOpenStream(TransferUtilityOpenStreamRequest request, AsyncCallback callback, object state)
{
OpenStreamCommand command = new OpenStreamCommand(this._s3Client, request);
return beginOperation(command, callback, state);
}
/// <summary>
/// Returns a stream to read the contents from Amazon S3 as
/// specified by the <c>TransferUtilityOpenStreamRequest</c>.
/// The caller of this method is responsible for closing the stream.
/// </summary>
/// <param name="request">
/// Contains all the parameters used for opening a stream to an S3 object.
/// </param>
/// <returns>
/// A stream containing contents returned from Amazon S3.
/// </returns>
public Stream OpenStream(TransferUtilityOpenStreamRequest request)
{
OpenStreamCommand command = new OpenStreamCommand(this._s3Client, request);
command.Execute();
return command.ResponseStream;
}
/// <summary>
/// Returns a stream to read the contents from Amazon S3 as
/// specified by the <c>TransferUtilityOpenStreamRequest</c>.
/// The caller of this method is responsible for closing the stream.
/// </summary>
/// <param name="request">
/// Contains all the parameters required for the OpenStream operation.
/// </param>
/// <param name="cancellationToken">
/// A cancellation token that can be used by other objects or threads to receive notice of cancellation.
/// </param>
/// <returns>The task object representing the asynchronous operation.</returns>
public async Task<Stream> OpenStreamAsync(TransferUtilityOpenStreamRequest request, CancellationToken cancellationToken = default(CancellationToken))
{
OpenStreamCommand command = new OpenStreamCommand(this._s3Client, request);
await command.ExecuteAsync(cancellationToken).ConfigureAwait(continueOnCapturedContext: false);
return command.ResponseStream;
}