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

   1 //
   2 // HttpChannelListener.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 class HttpChannelListener<TChannel> : InternalChannelListenerBase<TChannel>, IChannelDispatcherBoundListener
  44                 where TChannel : class, IChannel
  45         {
  46                 HttpListenerManager listener_manager;
  47
  48                 public HttpChannelListener (HttpTransportBindingElement source, BindingContext context)
  49                         : base (context)
  50                 {
  51                         if (ServiceHostBase.CurrentServiceHostHack != null)
  52                                 DispatcherBuilder.ChannelDispatcherSetter = delegate (ChannelDispatcher cd) { this.ChannelDispatcher = cd; };
  53
  54                         this.Source = source;
  55                         // The null Uri check looks weird, but it seems the listener can be built without it.
  56                         // See HttpTransportBindingElementTest.BuildChannelListenerWithoutListenUri().
  57                         if (Uri != null && source.Scheme != Uri.Scheme)
  58                                 throw new ArgumentException (String.Format ("Requested listen uri scheme must be {0}, but was {1}.", source.Scheme, Uri.Scheme));
  59
  60                         foreach (BindingElement be in context.Binding.Elements) {
  61                                 MessageEncodingBindingElement mbe = be as MessageEncodingBindingElement;
  62                                 if (mbe != null) {
  63                                         MessageEncoder = CreateEncoder<TChannel> (mbe);
  64                                         break;
  65                                 }
  66                         }
  67                         if (MessageEncoder == null)
  68                                 MessageEncoder = new TextMessageEncoder (MessageVersion.Default, Encoding.UTF8);
  69
  70                         if (context.BindingParameters.Contains (typeof (ServiceCredentials)))
  71                                 SecurityTokenManager = new ServiceCredentialsSecurityTokenManager ((ServiceCredentials) context.BindingParameters [typeof (ServiceCredentials)]);
  72                 }
  73
  74                 public ChannelDispatcher ChannelDispatcher { get; set; }
  75
  76                 public HttpTransportBindingElement Source { get; private set; }
  77
  78                 public HttpListenerManager ListenerManager {
  79                         get {  return listener_manager; }
  80                 }
  81
  82                 public ServiceCredentialsSecurityTokenManager SecurityTokenManager { get; private set; }
  83
  84                 ManualResetEvent accept_channel_handle = new ManualResetEvent (true);
  85
  86                 protected override TChannel OnAcceptChannel (TimeSpan timeout)
  87                 {
  88                         // HTTP channel could be accepted while there is no incoming request yet. The reply channel waits for the actual request.
  89                         // HTTP channel listeners do not accept more than one channel at a time.
  90                         DateTime start = DateTime.UtcNow;
  91                         TimeSpan waitTimeout;
  92                         if (timeout == TimeSpan.MaxValue)
  93                                 waitTimeout = TimeSpan.FromMilliseconds(int.MaxValue);
  94                         else
  95                                 waitTimeout = timeout - (DateTime.UtcNow - start);
  96                         accept_channel_handle.WaitOne (waitTimeout);
  97                         accept_channel_handle.Reset ();
  98                         TChannel ch = CreateChannel (timeout - (DateTime.UtcNow - 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 HttpReplyChannel ((HttpChannelListener<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, Source);
 129                 }
 130
 131                 protected override void OnOpen (TimeSpan timeout)
 132                 {
 133                         listener_manager = GetOrCreateListenerManager ();
 134                         Properties.Add (listener_manager);
 135                         listener_manager.RegisterListener (ChannelDispatcher, Source, 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 }