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using System;
using System.Collections.Generic;
using System.Security.Cryptography.X509Certificates;
using System.Threading;
using System.Threading.Tasks;
using Emby.Server.Implementations.HttpServer;
using Emby.Server.Implementations.Net;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Net;
using MediaBrowser.Model.Cryptography;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Net;
using MediaBrowser.Model.Services;
using MediaBrowser.Model.System;
using Microsoft.Extensions.Logging;
using SocketHttpListener.Net;
namespace Jellyfin.Server.SocketSharp
{
public class WebSocketSharpListener : IHttpListener
{
private HttpListener _listener;
private readonly ILogger _logger;
private readonly X509Certificate _certificate;
private readonly IStreamHelper _streamHelper;
private readonly INetworkManager _networkManager;
private readonly ISocketFactory _socketFactory;
private readonly ICryptoProvider _cryptoProvider;
private readonly IFileSystem _fileSystem;
private readonly bool _enableDualMode;
private readonly IEnvironmentInfo _environment;
private CancellationTokenSource _disposeCancellationTokenSource = new CancellationTokenSource();
private CancellationToken _disposeCancellationToken;
public WebSocketSharpListener(
ILogger logger,
X509Certificate certificate,
IStreamHelper streamHelper,
INetworkManager networkManager,
ISocketFactory socketFactory,
ICryptoProvider cryptoProvider,
bool enableDualMode,
IFileSystem fileSystem,
IEnvironmentInfo environment)
{
_logger = logger;
_certificate = certificate;
_streamHelper = streamHelper;
_networkManager = networkManager;
_socketFactory = socketFactory;
_cryptoProvider = cryptoProvider;
_enableDualMode = enableDualMode;
_fileSystem = fileSystem;
_environment = environment;
_disposeCancellationToken = _disposeCancellationTokenSource.Token;
}
public Func<Exception, IRequest, bool, bool, Task> ErrorHandler { get; set; }
public Func<IHttpRequest, string, string, string, CancellationToken, Task> RequestHandler { get; set; }
public Action<WebSocketConnectingEventArgs> WebSocketConnecting { get; set; }
public Action<WebSocketConnectEventArgs> WebSocketConnected { get; set; }
public void Start(IEnumerable<string> urlPrefixes)
{
if (_listener == null)
{
_listener = new HttpListener(_logger, _cryptoProvider, _socketFactory, _streamHelper, _fileSystem, _environment);
}
_listener.EnableDualMode = _enableDualMode;
if (_certificate != null)
{
_listener.LoadCert(_certificate);
}
_logger.LogInformation("Adding HttpListener prefixes {Prefixes}", urlPrefixes);
_listener.Prefixes.AddRange(urlPrefixes);
_listener.OnContext = async c => await InitTask(c, _disposeCancellationToken).ConfigureAwait(false);
_listener.Start();
}
private static void LogRequest(ILogger logger, HttpListenerRequest request)
{
var url = request.Url.ToString();
logger.LogInformation(
"{0} {1}. UserAgent: {2}",
request.IsWebSocketRequest ? "WS" : "HTTP " + request.HttpMethod,
url,
request.UserAgent ?? string.Empty);
}
private Task InitTask(HttpListenerContext context, CancellationToken cancellationToken)
{
IHttpRequest httpReq = null;
var request = context.Request;
try
{
if (request.IsWebSocketRequest)
{
LogRequest(_logger, request);
return ProcessWebSocketRequest(context);
}
httpReq = GetRequest(context);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error processing request");
httpReq = httpReq ?? GetRequest(context);
return ErrorHandler(ex, httpReq, true, true);
}
var uri = request.Url;
return RequestHandler(httpReq, uri.OriginalString, uri.Host, uri.LocalPath, cancellationToken);
}
private async Task ProcessWebSocketRequest(HttpListenerContext ctx)
{
try
{
var endpoint = ctx.Request.RemoteEndPoint.ToString();
var url = ctx.Request.RawUrl;
var queryString = ctx.Request.QueryString;
var connectingArgs = new WebSocketConnectingEventArgs
{
Url = url,
QueryString = queryString,
Endpoint = endpoint
};
WebSocketConnecting?.Invoke(connectingArgs);
if (connectingArgs.AllowConnection)
{
_logger.LogDebug("Web socket connection allowed");
var webSocketContext = await ctx.AcceptWebSocketAsync(null).ConfigureAwait(false);
if (WebSocketConnected != null)
{
var socket = new SharpWebSocket(webSocketContext.WebSocket, _logger);
await socket.ConnectAsServerAsync().ConfigureAwait(false);
WebSocketConnected(new WebSocketConnectEventArgs
{
Url = url,
QueryString = queryString,
WebSocket = socket,
Endpoint = endpoint
});
await socket.StartReceive().ConfigureAwait(false);
}
}
else
{
_logger.LogWarning("Web socket connection not allowed");
TryClose(ctx, 401);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "AcceptWebSocketAsync error");
TryClose(ctx, 500);
}
}
private void TryClose(HttpListenerContext ctx, int statusCode)
{
try
{
ctx.Response.StatusCode = statusCode;
ctx.Response.Close();
}
catch (Exception ex)
{
_logger.LogError(ex, "Error closing web socket response");
}
}
private IHttpRequest GetRequest(HttpListenerContext httpContext)
{
var urlSegments = httpContext.Request.Url.Segments;
var operationName = urlSegments[urlSegments.Length - 1];
var req = new WebSocketSharpRequest(httpContext, operationName, _logger);
return req;
}
public Task Stop()
{
_disposeCancellationTokenSource.Cancel();
_listener?.Close();
return Task.CompletedTask;
}
/// <summary>
/// Releases the unmanaged resources and disposes of the managed resources used.
/// </summary>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private bool _disposed;
/// <summary>
/// Releases the unmanaged resources and disposes of the managed resources used.
/// </summary>
/// <param name="disposing">Whether or not the managed resources should be disposed</param>
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
Stop().GetAwaiter().GetResult();
}
_disposed = true;
}
}
}
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