jellyfin/Emby.Server.Implementations/HttpServer/StreamWriter.cs

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3.8 KiB
C#
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using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
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using System.Globalization;
using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Model.Services;
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namespace Emby.Server.Implementations.HttpServer
{
/// <summary>
/// Class StreamWriter
/// </summary>
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public class StreamWriter : IAsyncStreamWriter, IHasHeaders
{
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private ILogger Logger { get; set; }
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private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
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/// <summary>
/// Gets or sets the source stream.
/// </summary>
/// <value>The source stream.</value>
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private Stream SourceStream { get; set; }
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private byte[] SourceBytes { 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>
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public IDictionary<string, string> Headers
{
get { return _options; }
}
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public Action OnComplete { get; set; }
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public Action OnError { get; set; }
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/// <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>
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/// <param name="logger">The logger.</param>
public StreamWriter(Stream source, string contentType, ILogger logger)
{
if (string.IsNullOrEmpty(contentType))
{
throw new ArgumentNullException("contentType");
}
SourceStream = source;
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Logger = logger;
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Headers["Content-Type"] = contentType;
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if (source.CanSeek)
{
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Headers["Content-Length"] = source.Length.ToString(UsCulture);
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}
}
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/// <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)
{
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if (string.IsNullOrEmpty(contentType))
{
throw new ArgumentNullException("contentType");
}
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SourceBytes = source;
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Logger = logger;
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Headers["Content-Type"] = contentType;
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Headers["Content-Length"] = source.Length.ToString(UsCulture);
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}
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public async Task WriteToAsync(Stream responseStream, CancellationToken cancellationToken)
{
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try
{
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var bytes = SourceBytes;
if (bytes != null)
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{
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await responseStream.WriteAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
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}
else
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{
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using (var src = SourceStream)
{
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await src.CopyToAsync(responseStream).ConfigureAwait(false);
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}
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}
}
catch (Exception ex)
{
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Logger.ErrorException("Error streaming data", ex);
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if (OnError != null)
{
OnError();
}
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throw;
}
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finally
{
if (OnComplete != null)
{
OnComplete();
}
}
}
}
}