using System; using System.Collections; using System.Collections.Generic; using System.Net; using System.Net.Sockets; using Microsoft.Extensions.Logging; namespace SocketHttpListener.Net { internal sealed class HttpEndPointManager { private static Dictionary> s_ipEndPoints = new Dictionary>(); private HttpEndPointManager() { } public static void AddListener(ILogger logger, HttpListener listener) { var added = new List(); try { lock ((s_ipEndPoints as ICollection).SyncRoot) { foreach (string prefix in listener.Prefixes) { AddPrefixInternal(logger, prefix, listener); added.Add(prefix); } } } catch { foreach (string prefix in added) { RemovePrefix(logger, prefix, listener); } throw; } } public static void AddPrefix(ILogger logger, string prefix, HttpListener listener) { lock ((s_ipEndPoints as ICollection).SyncRoot) { AddPrefixInternal(logger, prefix, listener); } } private static void AddPrefixInternal(ILogger logger, string p, HttpListener listener) { int start = p.IndexOf(':') + 3; int colon = p.IndexOf(':', start); if (colon != -1) { // root can't be -1 here, since we've already checked for ending '/' in ListenerPrefix. int root = p.IndexOf('/', colon, p.Length - colon); string portString = p.Substring(colon + 1, root - colon - 1); if (!int.TryParse(portString, out var port) || port <= 0 || port >= 65536) { throw new HttpListenerException((int)HttpStatusCode.BadRequest, "net_invalid_port"); } } var lp = new ListenerPrefix(p); if (lp.Host != "*" && lp.Host != "+" && Uri.CheckHostName(lp.Host) == UriHostNameType.Unknown) throw new HttpListenerException((int)HttpStatusCode.BadRequest, "net_listener_host"); if (lp.Path.IndexOf('%') != -1) throw new HttpListenerException((int)HttpStatusCode.BadRequest, "net_invalid_path"); if (lp.Path.IndexOf("//", StringComparison.Ordinal) != -1) throw new HttpListenerException((int)HttpStatusCode.BadRequest, "net_invalid_path"); // listens on all the interfaces if host name cannot be parsed by IPAddress. HttpEndPointListener epl = GetEPListener(logger, lp.Host, lp.Port, listener, lp.Secure); epl.AddPrefix(lp, listener); } private static IPAddress GetIpAnyAddress(HttpListener listener) { return listener.EnableDualMode ? IPAddress.IPv6Any : IPAddress.Any; } private static HttpEndPointListener GetEPListener(ILogger logger, string host, int port, HttpListener listener, bool secure) { IPAddress addr; if (host == "*" || host == "+") { addr = GetIpAnyAddress(listener); } else { const int NotSupportedErrorCode = 50; try { addr = Dns.GetHostAddresses(host)[0]; } catch { // Throw same error code as windows, request is not supported. throw new HttpListenerException(NotSupportedErrorCode, "net_listener_not_supported"); } if (IPAddress.Any.Equals(addr)) { // Don't support listening to 0.0.0.0, match windows behavior. throw new HttpListenerException(NotSupportedErrorCode, "net_listener_not_supported"); } } Dictionary p = null; if (s_ipEndPoints.ContainsKey(addr)) { p = s_ipEndPoints[addr]; } else { p = new Dictionary(); s_ipEndPoints[addr] = p; } HttpEndPointListener epl = null; if (p.ContainsKey(port)) { epl = p[port]; } else { try { epl = new HttpEndPointListener(listener, addr, port, secure, listener.Certificate, logger, listener.CryptoProvider, listener.SocketFactory, listener.StreamHelper, listener.FileSystem, listener.EnvironmentInfo); } catch (SocketException ex) { throw new HttpListenerException(ex.ErrorCode, ex.Message); } p[port] = epl; } return epl; } public static void RemoveEndPoint(HttpEndPointListener epl, IPEndPoint ep) { lock ((s_ipEndPoints as ICollection).SyncRoot) { Dictionary p = null; p = s_ipEndPoints[ep.Address]; p.Remove(ep.Port); if (p.Count == 0) { s_ipEndPoints.Remove(ep.Address); } epl.Close(); } } public static void RemoveListener(ILogger logger, HttpListener listener) { lock ((s_ipEndPoints as ICollection).SyncRoot) { foreach (string prefix in listener.Prefixes) { RemovePrefixInternal(logger, prefix, listener); } } } public static void RemovePrefix(ILogger logger, string prefix, HttpListener listener) { lock ((s_ipEndPoints as ICollection).SyncRoot) { RemovePrefixInternal(logger, prefix, listener); } } private static void RemovePrefixInternal(ILogger logger, string prefix, HttpListener listener) { var lp = new ListenerPrefix(prefix); if (lp.Path.IndexOf('%') != -1) return; if (lp.Path.IndexOf("//", StringComparison.Ordinal) != -1) return; HttpEndPointListener epl = GetEPListener(logger, lp.Host, lp.Port, listener, lp.Secure); epl.RemovePrefix(lp, listener); } } }