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using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using IRequest = MediaBrowser.Model.Services.IRequest;
namespace Emby.Server.Implementations.SocketSharp
{
public class WebSocketSharpResponse : IResponse
{
private readonly ILogger _logger;
public WebSocketSharpResponse(ILogger logger, HttpResponse response)
{
_logger = logger;
OriginalResponse = response;
}
public HttpResponse OriginalResponse { get; }
public int StatusCode
{
get => OriginalResponse.StatusCode;
set => OriginalResponse.StatusCode = value;
}
public string StatusDescription { get; set; }
public string ContentType
{
get => OriginalResponse.ContentType;
set => OriginalResponse.ContentType = value;
}
public void AddHeader(string name, string value)
{
if (string.Equals(name, "Content-Type", StringComparison.OrdinalIgnoreCase))
{
ContentType = value;
return;
}
OriginalResponse.Headers.Add(name, value);
}
public void Redirect(string url)
{
OriginalResponse.Redirect(url);
}
public Stream OutputStream => OriginalResponse.Body;
public bool SendChunked { get; set; }
const int StreamCopyToBufferSize = 81920;
public async Task TransmitFile(string path, long offset, long count, FileShareMode fileShareMode, IFileSystem fileSystem, IStreamHelper streamHelper, CancellationToken cancellationToken)
{
var allowAsync = !RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
//if (count <= 0)
//{
// allowAsync = true;
//}
var fileOpenOptions = FileOpenOptions.SequentialScan;
if (allowAsync)
{
fileOpenOptions |= FileOpenOptions.Asynchronous;
}
// use non-async filestream along with read due to https://github.com/dotnet/corefx/issues/6039
using (var fs = fileSystem.GetFileStream(path, FileOpenMode.Open, FileAccessMode.Read, fileShareMode, fileOpenOptions))
{
if (offset > 0)
{
fs.Position = offset;
}
if (count > 0)
{
await streamHelper.CopyToAsync(fs, OutputStream, count, cancellationToken).ConfigureAwait(false);
}
else
{
await fs.CopyToAsync(OutputStream, StreamCopyToBufferSize, cancellationToken).ConfigureAwait(false);
}
}
}
}
}
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