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using System.Collections.Specialized;
using MediaBrowser.Controller.Net;
using MediaBrowser.Model.Logging;
using MediaBrowser.Server.Implementations.Logging;
using ServiceStack;
using ServiceStack.Web;
using SocketHttpListener.Net;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace MediaBrowser.Server.Implementations.HttpServer.SocketSharp
{
public class WebSocketSharpListener : IHttpListener
{
private HttpListener _listener;
private readonly ILogger _logger;
private readonly string _certificatePath;
public WebSocketSharpListener(ILogger logger, string certificatePath)
{
_logger = logger;
_certificatePath = certificatePath;
}
public Action<Exception, IRequest> ErrorHandler { get; set; }
public Func<IHttpRequest, Uri, 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(new PatternsLogger(_logger), _certificatePath);
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)
{
Task.Factory.StartNew(() => InitTask(context));
}
private void InitTask(HttpListenerContext context)
{
try
{
var task = this.ProcessRequestAsync(context);
task.ContinueWith(x => HandleError(x.Exception, context), TaskContinuationOptions.OnlyOnFaulted | TaskContinuationOptions.AttachedToParent);
//if (task.Status == TaskStatus.Created)
//{
// task.RunSynchronously();
//}
}
catch (Exception ex)
{
HandleError(ex, context);
}
}
private Task ProcessRequestAsync(HttpListenerContext context)
{
var request = context.Request;
if (request.IsWebSocketRequest)
{
LoggerUtils.LogRequest(_logger, request);
ProcessWebSocketRequest(context);
return Task.FromResult(true);
}
if (string.IsNullOrEmpty(context.Request.RawUrl))
return ((object)null).AsTaskResult();
var httpReq = GetRequest(context);
return RequestHandler(httpReq, request.Url);
}
private void ProcessWebSocketRequest(HttpListenerContext ctx)
{
try
{
var endpoint = ctx.Request.RemoteEndPoint.ToString();
var url = ctx.Request.RawUrl;
var queryString = new NameValueCollection(ctx.Request.QueryString ?? new NameValueCollection());
var connectingArgs = new WebSocketConnectingEventArgs
{
Url = url,
QueryString = 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 = 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, RequestAttributes.None, _logger);
req.RequestAttributes = req.GetAttributes();
return req;
}
private void HandleError(Exception ex, HttpListenerContext context)
{
var httpReq = GetRequest(context);
if (ErrorHandler != null)
{
ErrorHandler(ex, httpReq);
}
}
public void Stop()
{
if (_listener != null)
{
foreach (var prefix in _listener.Prefixes.ToList())
{
_listener.Prefixes.Remove(prefix);
}
_listener.Close();
}
}
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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