528 lines
17 KiB
C#
528 lines
17 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Net;
|
|
using System.Net.Sockets;
|
|
using System.Security.Cryptography.X509Certificates;
|
|
using System.Threading;
|
|
using MediaBrowser.Model.Cryptography;
|
|
using MediaBrowser.Model.IO;
|
|
using MediaBrowser.Model.Net;
|
|
using MediaBrowser.Model.System;
|
|
using MediaBrowser.Model.Text;
|
|
using Microsoft.Extensions.Logging;
|
|
|
|
namespace SocketHttpListener.Net
|
|
{
|
|
internal sealed class HttpEndPointListener
|
|
{
|
|
private HttpListener _listener;
|
|
private IPEndPoint _endpoint;
|
|
private Socket _socket;
|
|
private Dictionary<ListenerPrefix, HttpListener> _prefixes;
|
|
private List<ListenerPrefix> _unhandledPrefixes; // host = '*'
|
|
private List<ListenerPrefix> _allPrefixes; // host = '+'
|
|
private X509Certificate _cert;
|
|
private bool _secure;
|
|
private Dictionary<HttpConnection, HttpConnection> _unregisteredConnections;
|
|
|
|
private readonly ILogger _logger;
|
|
private bool _closed;
|
|
private bool _enableDualMode;
|
|
private readonly ICryptoProvider _cryptoProvider;
|
|
private readonly ISocketFactory _socketFactory;
|
|
private readonly ITextEncoding _textEncoding;
|
|
private readonly IStreamHelper _streamHelper;
|
|
private readonly IFileSystem _fileSystem;
|
|
private readonly IEnvironmentInfo _environment;
|
|
|
|
public HttpEndPointListener(HttpListener listener, IPAddress addr, int port, bool secure, X509Certificate cert, ILogger logger, ICryptoProvider cryptoProvider, ISocketFactory socketFactory, IStreamHelper streamHelper, ITextEncoding textEncoding, IFileSystem fileSystem, IEnvironmentInfo environment)
|
|
{
|
|
this._listener = listener;
|
|
_logger = logger;
|
|
_cryptoProvider = cryptoProvider;
|
|
_socketFactory = socketFactory;
|
|
_streamHelper = streamHelper;
|
|
_textEncoding = textEncoding;
|
|
_fileSystem = fileSystem;
|
|
_environment = environment;
|
|
|
|
this._secure = secure;
|
|
this._cert = cert;
|
|
|
|
_enableDualMode = addr.Equals(IPAddress.IPv6Any);
|
|
_endpoint = new IPEndPoint(addr, port);
|
|
|
|
_prefixes = new Dictionary<ListenerPrefix, HttpListener>();
|
|
_unregisteredConnections = new Dictionary<HttpConnection, HttpConnection>();
|
|
|
|
CreateSocket();
|
|
}
|
|
|
|
internal HttpListener Listener => _listener;
|
|
|
|
private void CreateSocket()
|
|
{
|
|
try
|
|
{
|
|
_socket = CreateSocket(_endpoint.Address.AddressFamily, _enableDualMode);
|
|
}
|
|
catch (SocketCreateException ex)
|
|
{
|
|
if (_enableDualMode && _endpoint.Address.Equals(IPAddress.IPv6Any) &&
|
|
(string.Equals(ex.ErrorCode, "AddressFamilyNotSupported", StringComparison.OrdinalIgnoreCase) ||
|
|
// mono 4.8.1 and lower on bsd is throwing this
|
|
string.Equals(ex.ErrorCode, "ProtocolNotSupported", StringComparison.OrdinalIgnoreCase) ||
|
|
// mono 5.2 on bsd is throwing this
|
|
string.Equals(ex.ErrorCode, "OperationNotSupported", StringComparison.OrdinalIgnoreCase)))
|
|
{
|
|
_endpoint = new IPEndPoint(IPAddress.Any, _endpoint.Port);
|
|
_enableDualMode = false;
|
|
_socket = CreateSocket(_endpoint.Address.AddressFamily, _enableDualMode);
|
|
}
|
|
else
|
|
{
|
|
throw;
|
|
}
|
|
}
|
|
|
|
try
|
|
{
|
|
_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
|
|
}
|
|
catch (SocketException)
|
|
{
|
|
// This is not supported on all operating systems (qnap)
|
|
}
|
|
|
|
_socket.Bind(_endpoint);
|
|
|
|
// This is the number TcpListener uses.
|
|
_socket.Listen(2147483647);
|
|
|
|
Accept();
|
|
|
|
_closed = false;
|
|
}
|
|
|
|
private void Accept()
|
|
{
|
|
var acceptEventArg = new SocketAsyncEventArgs();
|
|
acceptEventArg.UserToken = this;
|
|
acceptEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(OnAccept);
|
|
|
|
Accept(acceptEventArg);
|
|
}
|
|
|
|
private static void TryCloseAndDispose(Socket socket)
|
|
{
|
|
try
|
|
{
|
|
using (socket)
|
|
{
|
|
socket.Close();
|
|
}
|
|
}
|
|
catch
|
|
{
|
|
|
|
}
|
|
}
|
|
|
|
private static void TryClose(Socket socket)
|
|
{
|
|
try
|
|
{
|
|
socket.Close();
|
|
}
|
|
catch
|
|
{
|
|
|
|
}
|
|
}
|
|
|
|
private void Accept(SocketAsyncEventArgs acceptEventArg)
|
|
{
|
|
// acceptSocket must be cleared since the context object is being reused
|
|
acceptEventArg.AcceptSocket = null;
|
|
|
|
try
|
|
{
|
|
bool willRaiseEvent = _socket.AcceptAsync(acceptEventArg);
|
|
|
|
if (!willRaiseEvent)
|
|
{
|
|
ProcessAccept(acceptEventArg);
|
|
}
|
|
}
|
|
catch (ObjectDisposedException)
|
|
{
|
|
// TODO Investigate or properly fix.
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
var epl = (HttpEndPointListener)acceptEventArg.UserToken;
|
|
|
|
epl._logger.LogError(ex, "Error in socket.AcceptAsync");
|
|
}
|
|
}
|
|
|
|
// This method is the callback method associated with Socket.AcceptAsync
|
|
// operations and is invoked when an accept operation is complete
|
|
//
|
|
private static void OnAccept(object sender, SocketAsyncEventArgs e)
|
|
{
|
|
ProcessAccept(e);
|
|
}
|
|
|
|
private static async void ProcessAccept(SocketAsyncEventArgs args)
|
|
{
|
|
var epl = (HttpEndPointListener)args.UserToken;
|
|
|
|
if (epl._closed)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// http://msdn.microsoft.com/en-us/library/system.net.sockets.acceptSocket.acceptasync%28v=vs.110%29.aspx
|
|
// Under certain conditions ConnectionReset can occur
|
|
// Need to attept to re-accept
|
|
var socketError = args.SocketError;
|
|
var accepted = args.AcceptSocket;
|
|
|
|
epl.Accept(args);
|
|
|
|
if (socketError == SocketError.ConnectionReset)
|
|
{
|
|
epl._logger.LogError("SocketError.ConnectionReset reported. Attempting to re-accept.");
|
|
return;
|
|
}
|
|
|
|
if (accepted == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (epl._secure && epl._cert == null)
|
|
{
|
|
TryClose(accepted);
|
|
return;
|
|
}
|
|
|
|
try
|
|
{
|
|
var remoteEndPointString = accepted.RemoteEndPoint == null ? string.Empty : accepted.RemoteEndPoint.ToString();
|
|
var localEndPointString = accepted.LocalEndPoint == null ? string.Empty : accepted.LocalEndPoint.ToString();
|
|
//_logger.LogInformation("HttpEndPointListener Accepting connection from {0} to {1} secure connection requested: {2}", remoteEndPointString, localEndPointString, _secure);
|
|
|
|
var conn = new HttpConnection(epl._logger, accepted, epl, epl._secure, epl._cert, epl._cryptoProvider, epl._streamHelper, epl._textEncoding, epl._fileSystem, epl._environment);
|
|
|
|
await conn.Init().ConfigureAwait(false);
|
|
|
|
//_logger.LogDebug("Adding unregistered connection to {0}. Id: {1}", accepted.RemoteEndPoint, connectionId);
|
|
lock (epl._unregisteredConnections)
|
|
{
|
|
epl._unregisteredConnections[conn] = conn;
|
|
}
|
|
conn.BeginReadRequest();
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
epl._logger.LogError(ex, "Error in ProcessAccept");
|
|
|
|
TryClose(accepted);
|
|
epl.Accept();
|
|
return;
|
|
}
|
|
}
|
|
|
|
private Socket CreateSocket(AddressFamily addressFamily, bool dualMode)
|
|
{
|
|
try
|
|
{
|
|
var socket = new Socket(addressFamily, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);
|
|
|
|
if (dualMode)
|
|
{
|
|
socket.DualMode = true;
|
|
}
|
|
|
|
return socket;
|
|
}
|
|
catch (SocketException ex)
|
|
{
|
|
throw new SocketCreateException(ex.SocketErrorCode.ToString(), ex);
|
|
}
|
|
catch (ArgumentException ex)
|
|
{
|
|
if (dualMode)
|
|
{
|
|
// Mono for BSD incorrectly throws ArgumentException instead of SocketException
|
|
throw new SocketCreateException("AddressFamilyNotSupported", ex);
|
|
}
|
|
else
|
|
{
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
internal void RemoveConnection(HttpConnection conn)
|
|
{
|
|
lock (_unregisteredConnections)
|
|
{
|
|
_unregisteredConnections.Remove(conn);
|
|
}
|
|
}
|
|
|
|
public bool BindContext(HttpListenerContext context)
|
|
{
|
|
var req = context.Request;
|
|
HttpListener listener = SearchListener(req.Url, out var prefix);
|
|
if (listener == null)
|
|
return false;
|
|
|
|
context.Connection.Prefix = prefix;
|
|
return true;
|
|
}
|
|
|
|
public void UnbindContext(HttpListenerContext context)
|
|
{
|
|
if (context == null || context.Request == null)
|
|
return;
|
|
|
|
_listener.UnregisterContext(context);
|
|
}
|
|
|
|
private HttpListener SearchListener(Uri uri, out ListenerPrefix prefix)
|
|
{
|
|
prefix = null;
|
|
if (uri == null)
|
|
return null;
|
|
|
|
string host = uri.Host;
|
|
int port = uri.Port;
|
|
string path = WebUtility.UrlDecode(uri.AbsolutePath);
|
|
string pathSlash = path[path.Length - 1] == '/' ? path : path + "/";
|
|
|
|
HttpListener bestMatch = null;
|
|
int bestLength = -1;
|
|
|
|
if (host != null && host != "")
|
|
{
|
|
Dictionary<ListenerPrefix, HttpListener> localPrefixes = _prefixes;
|
|
foreach (var p in localPrefixes.Keys)
|
|
{
|
|
string ppath = p.Path;
|
|
if (ppath.Length < bestLength)
|
|
continue;
|
|
|
|
if (p.Host != host || p.Port != port)
|
|
continue;
|
|
|
|
if (path.StartsWith(ppath) || pathSlash.StartsWith(ppath))
|
|
{
|
|
bestLength = ppath.Length;
|
|
bestMatch = localPrefixes[p];
|
|
prefix = p;
|
|
}
|
|
}
|
|
if (bestLength != -1)
|
|
return bestMatch;
|
|
}
|
|
|
|
List<ListenerPrefix> list = _unhandledPrefixes;
|
|
bestMatch = MatchFromList(host, path, list, out prefix);
|
|
|
|
if (path != pathSlash && bestMatch == null)
|
|
bestMatch = MatchFromList(host, pathSlash, list, out prefix);
|
|
|
|
if (bestMatch != null)
|
|
return bestMatch;
|
|
|
|
list = _allPrefixes;
|
|
bestMatch = MatchFromList(host, path, list, out prefix);
|
|
|
|
if (path != pathSlash && bestMatch == null)
|
|
bestMatch = MatchFromList(host, pathSlash, list, out prefix);
|
|
|
|
if (bestMatch != null)
|
|
return bestMatch;
|
|
|
|
return null;
|
|
}
|
|
|
|
private HttpListener MatchFromList(string host, string path, List<ListenerPrefix> list, out ListenerPrefix prefix)
|
|
{
|
|
prefix = null;
|
|
if (list == null)
|
|
return null;
|
|
|
|
HttpListener bestMatch = null;
|
|
int bestLength = -1;
|
|
|
|
foreach (ListenerPrefix p in list)
|
|
{
|
|
string ppath = p.Path;
|
|
if (ppath.Length < bestLength)
|
|
continue;
|
|
|
|
if (path.StartsWith(ppath))
|
|
{
|
|
bestLength = ppath.Length;
|
|
bestMatch = p._listener;
|
|
prefix = p;
|
|
}
|
|
}
|
|
|
|
return bestMatch;
|
|
}
|
|
|
|
private void AddSpecial(List<ListenerPrefix> list, ListenerPrefix prefix)
|
|
{
|
|
if (list == null)
|
|
return;
|
|
|
|
foreach (ListenerPrefix p in list)
|
|
{
|
|
if (p.Path == prefix.Path)
|
|
throw new Exception("net_listener_already");
|
|
}
|
|
list.Add(prefix);
|
|
}
|
|
|
|
private bool RemoveSpecial(List<ListenerPrefix> list, ListenerPrefix prefix)
|
|
{
|
|
if (list == null)
|
|
return false;
|
|
|
|
int c = list.Count;
|
|
for (int i = 0; i < c; i++)
|
|
{
|
|
ListenerPrefix p = list[i];
|
|
if (p.Path == prefix.Path)
|
|
{
|
|
list.RemoveAt(i);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private void CheckIfRemove()
|
|
{
|
|
if (_prefixes.Count > 0)
|
|
return;
|
|
|
|
List<ListenerPrefix> list = _unhandledPrefixes;
|
|
if (list != null && list.Count > 0)
|
|
return;
|
|
|
|
list = _allPrefixes;
|
|
if (list != null && list.Count > 0)
|
|
return;
|
|
|
|
HttpEndPointManager.RemoveEndPoint(this, _endpoint);
|
|
}
|
|
|
|
public void Close()
|
|
{
|
|
_closed = true;
|
|
_socket.Close();
|
|
lock (_unregisteredConnections)
|
|
{
|
|
// Clone the list because RemoveConnection can be called from Close
|
|
var connections = new List<HttpConnection>(_unregisteredConnections.Keys);
|
|
|
|
foreach (HttpConnection c in connections)
|
|
c.Close(true);
|
|
_unregisteredConnections.Clear();
|
|
}
|
|
}
|
|
|
|
public void AddPrefix(ListenerPrefix prefix, HttpListener listener)
|
|
{
|
|
List<ListenerPrefix> current;
|
|
List<ListenerPrefix> future;
|
|
if (prefix.Host == "*")
|
|
{
|
|
do
|
|
{
|
|
current = _unhandledPrefixes;
|
|
future = current != null ? new List<ListenerPrefix>(current) : new List<ListenerPrefix>();
|
|
prefix._listener = listener;
|
|
AddSpecial(future, prefix);
|
|
} while (Interlocked.CompareExchange(ref _unhandledPrefixes, future, current) != current);
|
|
return;
|
|
}
|
|
|
|
if (prefix.Host == "+")
|
|
{
|
|
do
|
|
{
|
|
current = _allPrefixes;
|
|
future = current != null ? new List<ListenerPrefix>(current) : new List<ListenerPrefix>();
|
|
prefix._listener = listener;
|
|
AddSpecial(future, prefix);
|
|
} while (Interlocked.CompareExchange(ref _allPrefixes, future, current) != current);
|
|
return;
|
|
}
|
|
|
|
Dictionary<ListenerPrefix, HttpListener> prefs, p2;
|
|
do
|
|
{
|
|
prefs = _prefixes;
|
|
if (prefs.ContainsKey(prefix))
|
|
{
|
|
throw new Exception("net_listener_already");
|
|
}
|
|
p2 = new Dictionary<ListenerPrefix, HttpListener>(prefs);
|
|
p2[prefix] = listener;
|
|
} while (Interlocked.CompareExchange(ref _prefixes, p2, prefs) != prefs);
|
|
}
|
|
|
|
public void RemovePrefix(ListenerPrefix prefix, HttpListener listener)
|
|
{
|
|
List<ListenerPrefix> current;
|
|
List<ListenerPrefix> future;
|
|
if (prefix.Host == "*")
|
|
{
|
|
do
|
|
{
|
|
current = _unhandledPrefixes;
|
|
future = current != null ? new List<ListenerPrefix>(current) : new List<ListenerPrefix>();
|
|
if (!RemoveSpecial(future, prefix))
|
|
break; // Prefix not found
|
|
} while (Interlocked.CompareExchange(ref _unhandledPrefixes, future, current) != current);
|
|
|
|
CheckIfRemove();
|
|
return;
|
|
}
|
|
|
|
if (prefix.Host == "+")
|
|
{
|
|
do
|
|
{
|
|
current = _allPrefixes;
|
|
future = current != null ? new List<ListenerPrefix>(current) : new List<ListenerPrefix>();
|
|
if (!RemoveSpecial(future, prefix))
|
|
break; // Prefix not found
|
|
} while (Interlocked.CompareExchange(ref _allPrefixes, future, current) != current);
|
|
CheckIfRemove();
|
|
return;
|
|
}
|
|
|
|
Dictionary<ListenerPrefix, HttpListener> prefs, p2;
|
|
do
|
|
{
|
|
prefs = _prefixes;
|
|
if (!prefs.ContainsKey(prefix))
|
|
break;
|
|
|
|
p2 = new Dictionary<ListenerPrefix, HttpListener>(prefs);
|
|
p2.Remove(prefix);
|
|
} while (Interlocked.CompareExchange(ref _prefixes, p2, prefs) != prefs);
|
|
CheckIfRemove();
|
|
}
|
|
}
|
|
}
|