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using MediaBrowser.Model.Logging;
using ServiceStack.Web;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.HttpServer
{
/// <summary>
/// Class StreamWriter
/// </summary>
public class StreamWriter : IStreamWriter, IHasOptions
{
private ILogger Logger { get; set; }
private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
/// <summary>
/// Gets or sets the source stream.
/// </summary>
/// <value>The source stream.</value>
private Stream SourceStream { get; set; }
/// <summary>
/// The _options
/// </summary>
private readonly IDictionary<string, string> _options = new Dictionary<string, string>();
/// <summary>
/// Gets the options.
/// </summary>
/// <value>The options.</value>
public IDictionary<string, string> Options
{
get { return _options; }
}
public bool Throttle { get; set; }
public long ThrottleLimit { get; set; }
public long MinThrottlePosition;
public Func<long, long, long> ThrottleCallback { get; set; }
public Action OnComplete { get; set; }
/// <summary>
/// Initializes a new instance of the <see cref="StreamWriter" /> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="contentType">Type of the content.</param>
/// <param name="logger">The logger.</param>
public StreamWriter(Stream source, string contentType, ILogger logger)
{
if (string.IsNullOrEmpty(contentType))
{
throw new ArgumentNullException("contentType");
}
SourceStream = source;
Logger = logger;
Options["Content-Type"] = contentType;
if (source.CanSeek)
{
Options["Content-Length"] = source.Length.ToString(UsCulture);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="StreamWriter"/> class.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="contentType">Type of the content.</param>
/// <param name="logger">The logger.</param>
public StreamWriter(byte[] source, string contentType, ILogger logger)
: this(new MemoryStream(source), contentType, logger)
{
}
/// <summary>
/// Writes to.
/// </summary>
/// <param name="responseStream">The response stream.</param>
public void WriteTo(Stream responseStream)
{
if (Throttle)
{
responseStream = new ThrottledStream(responseStream, ThrottleLimit)
{
MinThrottlePosition = MinThrottlePosition,
ThrottleCallback = ThrottleCallback
};
}
var task = WriteToAsync(responseStream);
Task.WaitAll(task);
}
/// <summary>
/// Writes to async.
/// </summary>
/// <param name="responseStream">The response stream.</param>
/// <returns>Task.</returns>
private async Task WriteToAsync(Stream responseStream)
{
try
{
using (var src = SourceStream)
{
await src.CopyToAsync(responseStream).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Logger.ErrorException("Error streaming data", ex);
throw;
}
finally
{
if (OnComplete != null)
{
OnComplete();
}
}
}
}
}
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