class/System.Runtime.Remoting/System.Runtime.Remoting.Channels.Http/RemotingHttpListener.cs

   1 //
   2 // RemotingHttpListener.cs
   3 //
   4 // Author:
   5 //   Michael Hutchinson <mhutchinson@novell.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.Text;
  32 using System.Net;
  33 using System.Net.Sockets;
  34 using System.Runtime.Remoting.Messaging;
  35 using System.IO;
  36
  37 namespace System.Runtime.Remoting.Channels.Http
  38 {
  39         sealed class RemotingHttpListener : IDisposable
  40         {
  41                 HttpServerTransportSink sink;
  42                 HttpListener listener;
  43                 int local_port;
  44
  45                 public RemotingHttpListener (IPAddress addr, int port, HttpServerTransportSink sink)
  46                 {
  47                         this.sink = sink;
  48                         bool find_port = false;
  49                         if (port == 0)
  50                                 find_port = true;
  51
  52                         string address = null;
  53                         if (addr == IPAddress.Any)
  54                                 address = "*";
  55 #if NET_2_0
  56                         else if (addr == IPAddress.IPv6Any)
  57                                 address = "*";
  58 #endif
  59                         else
  60                                 address = addr.ToString ();
  61
  62                         listener = new HttpListener ();
  63                         while (true) {
  64                                 Random rnd = null;
  65                                 if (find_port) {
  66                                         if (rnd == null)
  67                                                 rnd = new Random ();
  68                                         port = rnd.Next (1025, 65000);
  69                                 }
  70                                 try {
  71                                         listener.Prefixes.Add (String.Format ("http://{0}:{1}/", address, port));
  72                                         listener.Start ();
  73                                         local_port = port;
  74                                         break;
  75                                 } catch (Exception e) {
  76                                         if (!find_port)
  77                                                 throw;
  78                                         listener.Prefixes.Clear ();
  79                                         // Port already in use
  80                                 }
  81                         }
  82                         listener.BeginGetContext (new AsyncCallback (OnGetContext), null);
  83                 }
  84
  85                 public int AssignedPort
  86                 {
  87                         get { return local_port; }
  88                 }
  89
  90                 void OnGetContext (IAsyncResult ares)
  91                 {
  92                         if (listener == null)
  93                                 return; // already disposed
  94
  95                         HttpListenerContext context = null;
  96                         try {
  97                                 context = listener.EndGetContext (ares);
  98                                 listener.BeginGetContext (new AsyncCallback (OnGetContext), null);
  99                         } catch {
 100                                 // Listener was closed
 101                         }
 102
 103                         if (context != null) {
 104                                 try {
 105                                         sink.HandleRequest (context);
 106                                 } catch {
 107                                         try {
 108                                                 context.Response.Close ();
 109                                         } catch {}
 110                                 }
 111                         }
 112                 }
 113
 114                 public void Dispose ()
 115                 {
 116                         if (listener != null) {
 117                                 listener.Close ();
 118                                 listener = null;
 119                         }
 120                 }
 121         }
 122 }