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using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Emby.Server.Implementations;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using IHttpResponse = MediaBrowser.Model.Services.IHttpResponse;
using IRequest = MediaBrowser.Model.Services.IRequest;
namespace Emby.Server.Implementations.SocketSharp
{
public class WebSocketSharpResponse : IHttpResponse
{
private readonly ILogger _logger;
private readonly HttpResponse _response;
public WebSocketSharpResponse(ILogger logger, HttpResponse response, IRequest request)
{
_logger = logger;
this._response = response;
Items = new Dictionary<string, object>();
Request = request;
}
public IRequest Request { get; private set; }
public Dictionary<string, object> Items { get; private set; }
public object OriginalResponse => _response;
public int StatusCode
{
get => this._response.StatusCode;
set => this._response.StatusCode = value;
}
public string StatusDescription { get; set; }
public string ContentType
{
get => _response.ContentType;
set => _response.ContentType = value;
}
public QueryParamCollection Headers => new QueryParamCollection(_response.Headers);
private static string AsHeaderValue(Cookie cookie)
{
DateTime defaultExpires = DateTime.MinValue;
var path = cookie.Expires == defaultExpires
? "/"
: cookie.Path ?? "/";
var sb = new StringBuilder();
sb.Append($"{cookie.Name}={cookie.Value};path={path}");
if (cookie.Expires != defaultExpires)
{
sb.Append($";expires={cookie.Expires:R}");
}
if (!string.IsNullOrEmpty(cookie.Domain))
{
sb.Append($";domain={cookie.Domain}");
}
if (cookie.Secure)
{
sb.Append(";Secure");
}
if (cookie.HttpOnly)
{
sb.Append(";HttpOnly");
}
return sb.ToString();
}
public void AddHeader(string name, string value)
{
if (string.Equals(name, "Content-Type", StringComparison.OrdinalIgnoreCase))
{
ContentType = value;
return;
}
_response.Headers.Add(name, value);
}
public string GetHeader(string name)
{
return _response.Headers[name];
}
public void Redirect(string url)
{
_response.Redirect(url);
}
public Stream OutputStream => _response.Body;
public void Close()
{
if (!this.IsClosed)
{
this.IsClosed = true;
try
{
var response = this._response;
var outputStream = response.Body;
// This is needed with compression
outputStream.Flush();
outputStream.Dispose();
}
catch (SocketException)
{
}
catch (Exception ex)
{
_logger.LogError(ex, "Error in HttpListenerResponseWrapper");
}
}
}
public bool IsClosed
{
get;
private set;
}
public void SetContentLength(long contentLength)
{
// you can happily set the Content-Length header in Asp.Net
// but HttpListener will complain if you do - you have to set ContentLength64 on the response.
// workaround: HttpListener throws "The parameter is incorrect" exceptions when we try to set the Content-Length header
//_response.ContentLength64 = contentLength;
}
public void SetCookie(Cookie cookie)
{
var cookieStr = AsHeaderValue(cookie);
_response.Headers.Add("Set-Cookie", cookieStr);
}
public bool SendChunked { get; set; }
public bool KeepAlive { get; set; }
public void ClearCookies()
{
}
const int StreamCopyToBufferSize = 81920;
public async Task TransmitFile(string path, long offset, long count, FileShareMode fileShareMode, IFileSystem fileSystem, IStreamHelper streamHelper, CancellationToken cancellationToken)
{
// TODO
// return _response.TransmitFile(path, offset, count, fileShareMode, 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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