mcs/class/System.ServiceModel/System.ServiceModel.Channels.Http/HttpStandaloneChannelListener.cs

   1 //
   2 // HttpStandaloneChannelListener.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2010 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 using System;
  29 using System.Collections.Generic;
  30 using System.Collections.ObjectModel;
  31 using System.Linq;
  32 using System.Net;
  33 using System.Net.Security;
  34 using System.ServiceModel;
  35 using System.ServiceModel.Description;
  36 using System.ServiceModel.Dispatcher;
  37 using System.ServiceModel.Security;
  38 using System.Text;
  39 using System.Threading;
  40
  41 namespace System.ServiceModel.Channels.Http
  42 {
  43         internal interface IChannelDispatcherBoundListener
  44         {
  45                 ChannelDispatcher ChannelDispatcher { get; set; }
  46         }
  47
  48         internal class HttpStandaloneChannelListener<TChannel> : InternalChannelListenerBase<TChannel>, IChannelDispatcherBoundListener
  49                 where TChannel : class, IChannel
  50         {
  51                 HttpListenerManager listener_manager;
  52
  53                 public HttpStandaloneChannelListener (HttpTransportBindingElement source, BindingContext context)
  54                         : base (context)
  55                 {
  56                         if (ServiceHostBase.CurrentServiceHostHack != null)
  57                                 DispatcherBuilder.ChannelDispatcherSetter = delegate (ChannelDispatcher cd) { this.ChannelDispatcher = cd; };
  58
  59                         this.Source = source;
  60                         // The null Uri check looks weird, but it seems the listener can be built without it.
  61                         // See HttpTransportBindingElementTest.BuildChannelListenerWithoutListenUri().
  62                         if (Uri != null && source.Scheme != Uri.Scheme)
  63                                 throw new ArgumentException (String.Format ("Requested listen uri scheme must be {0}, but was {1}.", source.Scheme, Uri.Scheme));
  64
  65                         foreach (BindingElement be in context.Binding.Elements) {
  66                                 MessageEncodingBindingElement mbe = be as MessageEncodingBindingElement;
  67                                 if (mbe != null) {
  68                                         MessageEncoder = CreateEncoder<TChannel> (mbe);
  69                                         break;
  70                                 }
  71                         }
  72                         if (MessageEncoder == null)
  73                                 MessageEncoder = new TextMessageEncoder (MessageVersion.Default, Encoding.UTF8);
  74
  75                         if (context.BindingParameters.Contains (typeof (ServiceCredentials)))
  76                                 SecurityTokenManager = new ServiceCredentialsSecurityTokenManager ((ServiceCredentials) context.BindingParameters [typeof (ServiceCredentials)]);
  77                 }
  78
  79                 public ChannelDispatcher ChannelDispatcher { get; set; }
  80
  81                 public HttpTransportBindingElement Source { get; private set; }
  82
  83                 public HttpListenerManager ListenerManager {
  84                         get {  return listener_manager; }
  85                 }
  86
  87                 public ServiceCredentialsSecurityTokenManager SecurityTokenManager { get; private set; }
  88
  89                 ManualResetEvent accept_channel_handle = new ManualResetEvent (true);
  90
  91                 protected override TChannel OnAcceptChannel (TimeSpan timeout)
  92                 {
  93                         // HTTP channel could be accepted while there is no incoming request yet. The reply channel waits for the actual request.
  94                         // HTTP channel listeners do not accept more than one channel at a time.
  95                         DateTime start = DateTime.Now;
  96                         accept_channel_handle.WaitOne (timeout - (DateTime.Now - start));
  97                         accept_channel_handle.Reset ();
  98                         TChannel ch = CreateChannel (timeout - (DateTime.Now - start));
  99                         ch.Closed += delegate {
 100                                 accept_channel_handle.Set ();
 101                         };
 102                         return ch;
 103                 }
 104
 105                 protected TChannel CreateChannel (TimeSpan timeout)
 106                 {
 107                         lock (ThisLock) {
 108                                 return CreateChannelCore (timeout);
 109                         }
 110                 }
 111
 112                 TChannel CreateChannelCore (TimeSpan timeout)
 113                 {
 114                         if (typeof (TChannel) == typeof (IReplyChannel))
 115                                 return (TChannel) (object) new HttpStandaloneReplyChannel ((HttpStandaloneChannelListener<IReplyChannel>) (object) this);
 116
 117                         throw new NotSupportedException (String.Format ("Channel type {0} is not supported", typeof (TChannel)));
 118                 }
 119
 120                 protected override bool OnWaitForChannel (TimeSpan timeout)
 121                 {
 122                         throw new NotImplementedException ();
 123                 }
 124
 125                 protected HttpListenerManager GetOrCreateListenerManager ()
 126                 {
 127                         var table = HttpListenerManagerTable.GetOrCreate (ChannelDispatcher != null ? ChannelDispatcher.Host : null);
 128                         return table.GetOrCreateManager (Uri);
 129                 }
 130
 131                 protected override void OnOpen (TimeSpan timeout)
 132                 {
 133                         listener_manager = GetOrCreateListenerManager ();
 134                         Properties.Add (listener_manager);
 135                         listener_manager.RegisterListener (ChannelDispatcher, timeout);
 136                 }
 137
 138                 protected override void OnAbort ()
 139                 {
 140                         listener_manager.UnregisterListener (ChannelDispatcher, TimeSpan.Zero);
 141                 }
 142
 143                 protected override void OnClose (TimeSpan timeout)
 144                 {
 145                         if (State == CommunicationState.Closed)
 146                                 return;
 147                         base.OnClose (timeout);
 148                         // The channels are kept open when the creator channel listener is closed.
 149                         // http://blogs.msdn.com/drnick/archive/2006/03/22/557642.aspx
 150                         listener_manager.UnregisterListener (ChannelDispatcher, timeout);
 151                 }
 152
 153                 // immediately stop accepting channel.
 154                 public override bool CancelAsync (TimeSpan timeout)
 155                 {
 156                         try {
 157                                 CurrentAsyncResult.AsyncWaitHandle.WaitOne (TimeSpan.Zero);
 158                         } catch (TimeoutException) {
 159                         }
 160                         return true;
 161                 }
 162         }
 163 }