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using MediaBrowser.Controller.Net;
using MediaBrowser.Model.Logging;
using SocketHttpListener.Net;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Common.Net;
using MediaBrowser.Model.Cryptography;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Net;
using MediaBrowser.Model.Services;
using MediaBrowser.Model.System;
using MediaBrowser.Model.Text;
using SocketHttpListener.Primitives;
namespace Emby.Server.Implementations.HttpServer.SocketSharp
{
public class WebSocketSharpListener : IHttpListener
{
private HttpListener _listener;
private readonly ILogger _logger;
private readonly X509Certificate _certificate;
private readonly IMemoryStreamFactory _memoryStreamProvider;
private readonly ITextEncoding _textEncoding;
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, IMemoryStreamFactory memoryStreamProvider, ITextEncoding textEncoding, INetworkManager networkManager, ISocketFactory socketFactory, ICryptoProvider cryptoProvider, bool enableDualMode, IFileSystem fileSystem, IEnvironmentInfo environment)
{
_logger = logger;
_certificate = certificate;
_memoryStreamProvider = memoryStreamProvider;
_textEncoding = textEncoding;
_networkManager = networkManager;
_socketFactory = socketFactory;
_cryptoProvider = cryptoProvider;
_enableDualMode = enableDualMode;
_fileSystem = fileSystem;
_environment = environment;
_disposeCancellationToken = _disposeCancellationTokenSource.Token;
}
public Action<Exception, IRequest, bool> 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, _networkManager, _textEncoding, _memoryStreamProvider, _fileSystem, _environment);
_listener.EnableDualMode = _enableDualMode;
if (_certificate != null)
{
_listener.LoadCert(_certificate);
}
foreach (var prefix in urlPrefixes)
{
_logger.Info("Adding HttpListener prefix " + prefix);
_listener.Prefixes.Add(prefix);
}
_listener.OnContext = ProcessContext;
_listener.Start();
}
private void ProcessContext(HttpListenerContext context)
{
//InitTask(context, _disposeCancellationToken);
Task.Run(() => InitTask(context, _disposeCancellationToken));
}
private Task InitTask(HttpListenerContext context, CancellationToken cancellationToken)
{
IHttpRequest httpReq = null;
var request = context.Request;
try
{
if (request.IsWebSocketRequest)
{
LoggerUtils.LogRequest(_logger, request);
ProcessWebSocketRequest(context);
return Task.FromResult(true);
}
httpReq = GetRequest(context);
}
catch (Exception ex)
{
_logger.ErrorException("Error processing request", ex);
httpReq = httpReq ?? GetRequest(context);
ErrorHandler(ex, httpReq, true);
return Task.FromResult(true);
}
var uri = request.Url;
return RequestHandler(httpReq, uri.OriginalString, uri.Host, uri.LocalPath, cancellationToken);
}
private void ProcessWebSocketRequest(HttpListenerContext ctx)
{
try
{
var endpoint = ctx.Request.RemoteEndPoint.ToString();
var url = ctx.Request.RawUrl;
var connectingArgs = new WebSocketConnectingEventArgs
{
Url = url,
QueryString = ctx.Request.QueryString,
Endpoint = endpoint
};
if (WebSocketConnecting != null)
{
WebSocketConnecting(connectingArgs);
}
if (connectingArgs.AllowConnection)
{
_logger.Debug("Web socket connection allowed");
var webSocketContext = ctx.AcceptWebSocket(null);
if (WebSocketConnected != null)
{
WebSocketConnected(new WebSocketConnectEventArgs
{
Url = url,
QueryString = ctx.Request.QueryString,
WebSocket = new SharpWebSocket(webSocketContext.WebSocket, _logger),
Endpoint = endpoint
});
}
}
else
{
_logger.Warn("Web socket connection not allowed");
ctx.Response.StatusCode = 401;
ctx.Response.Close();
}
}
catch (Exception ex)
{
_logger.ErrorException("AcceptWebSocketAsync error", ex);
ctx.Response.StatusCode = 500;
ctx.Response.Close();
}
}
private IHttpRequest GetRequest(HttpListenerContext httpContext)
{
var operationName = httpContext.Request.GetOperationName();
var req = new WebSocketSharpRequest(httpContext, operationName, _logger, _memoryStreamProvider);
return req;
}
public Task Stop()
{
_disposeCancellationTokenSource.Cancel();
if (_listener != null)
{
_listener.Close();
}
return Task.FromResult(true);
}
public void Dispose()
{
Dispose(true);
}
private bool _disposed;
private readonly object _disposeLock = new object();
protected virtual void Dispose(bool disposing)
{
if (_disposed) return;
lock (_disposeLock)
{
if (_disposed) return;
if (disposing)
{
Stop();
}
//release unmanaged resources here...
_disposed = true;
}
}
}
}
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