/// <summary>
/// Reads a line of characters asynchronously from the current stream and returns the data as a string.
/// </summary>
/// <param name="stream">The stream to perform the operation on.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>A task that represents the asynchronous read operation.</returns>
public static async Task <string> ReadLineAsync(this ITextStream stream, CancellationToken cancellationToken)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
try
{
return(await stream.ReadLineAsync().WithCancellation(cancellationToken));
}
catch (OperationCanceledException)
{
return(null);
}
}
/// <summary>
/// Reads a line of characters asynchronously from the current stream and returns the data as a string.
/// </summary>
/// <param name="stream">The stream to perform the operation on.</param>
/// <param name="timeout">The timeout to apply when reading from the stream.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>A task that represents the asynchronous read operation.</returns>
public static async Task <string> ReadLineAsync(this ITextStream stream, TimeSpan timeout, CancellationToken cancellationToken)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
var cancellationTokenSource = new CancellationTokenSource();
cancellationToken.Register(cancellationTokenSource.Cancel);
var task = stream.ReadLineAsync();
if (task == await Task.WhenAny(task, Task.Delay(timeout, cancellationTokenSource.Token)))
{
cancellationTokenSource.Cancel();
cancellationTokenSource.Dispose();
return(await task);
}
throw new TimeoutException();
}
