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//
// HttpChannelListener.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2010 Novell, Inc. http://www.novell.com
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.ServiceModel.Security;
using System.Text;
using System.Threading;
namespace System.ServiceModel.Channels.Http
{
internal class HttpChannelListener<TChannel> : InternalChannelListenerBase<TChannel>, IChannelDispatcherBoundListener
where TChannel : class, IChannel
{
HttpListenerManager listener_manager;
public HttpChannelListener (HttpTransportBindingElement source, BindingContext context)
: base (context)
{
if (ServiceHostBase.CurrentServiceHostHack != null)
DispatcherBuilder.ChannelDispatcherSetter = delegate (ChannelDispatcher cd) { this.ChannelDispatcher = cd; };
this.Source = source;
// The null Uri check looks weird, but it seems the listener can be built without it.
// See HttpTransportBindingElementTest.BuildChannelListenerWithoutListenUri().
if (Uri != null && source.Scheme != Uri.Scheme)
throw new ArgumentException (String.Format ("Requested listen uri scheme must be {0}, but was {1}.", source.Scheme, Uri.Scheme));
foreach (BindingElement be in context.Binding.Elements) {
MessageEncodingBindingElement mbe = be as MessageEncodingBindingElement;
if (mbe != null) {
MessageEncoder = CreateEncoder<TChannel> (mbe);
break;
}
}
if (MessageEncoder == null)
MessageEncoder = new TextMessageEncoder (MessageVersion.Default, Encoding.UTF8);
if (context.BindingParameters.Contains (typeof (ServiceCredentials)))
SecurityTokenManager = new ServiceCredentialsSecurityTokenManager ((ServiceCredentials) context.BindingParameters [typeof (ServiceCredentials)]);
}
public ChannelDispatcher ChannelDispatcher { get; set; }
public HttpTransportBindingElement Source { get; private set; }
public HttpListenerManager ListenerManager {
get { return listener_manager; }
}
public ServiceCredentialsSecurityTokenManager SecurityTokenManager { get; private set; }
ManualResetEvent accept_channel_handle = new ManualResetEvent (true);
protected override TChannel OnAcceptChannel (TimeSpan timeout)
{
// HTTP channel could be accepted while there is no incoming request yet. The reply channel waits for the actual request.
// HTTP channel listeners do not accept more than one channel at a time.
DateTime start = DateTime.UtcNow;
TimeSpan waitTimeout;
if (timeout == TimeSpan.MaxValue)
waitTimeout = TimeSpan.FromMilliseconds(int.MaxValue);
else
waitTimeout = timeout - (DateTime.UtcNow - start);
accept_channel_handle.WaitOne (waitTimeout);
accept_channel_handle.Reset ();
TChannel ch = CreateChannel (timeout - (DateTime.UtcNow - start));
ch.Closed += delegate {
accept_channel_handle.Set ();
};
return ch;
}
protected TChannel CreateChannel (TimeSpan timeout)
{
lock (ThisLock) {
return CreateChannelCore (timeout);
}
}
TChannel CreateChannelCore (TimeSpan timeout)
{
if (typeof (TChannel) == typeof (IReplyChannel))
return (TChannel) (object) new HttpReplyChannel ((HttpChannelListener<IReplyChannel>) (object) this);
throw new NotSupportedException (String.Format ("Channel type {0} is not supported", typeof (TChannel)));
}
protected override bool OnWaitForChannel (TimeSpan timeout)
{
throw new NotImplementedException ();
}
protected HttpListenerManager GetOrCreateListenerManager ()
{
var table = HttpListenerManagerTable.GetOrCreate (ChannelDispatcher != null ? ChannelDispatcher.Host : null);
return table.GetOrCreateManager (Uri, Source);
}
protected override void OnOpen (TimeSpan timeout)
{
listener_manager = GetOrCreateListenerManager ();
Properties.Add (listener_manager);
listener_manager.RegisterListener (ChannelDispatcher, Source, timeout);
}
protected override void OnAbort ()
{
listener_manager.UnregisterListener (ChannelDispatcher, TimeSpan.Zero);
}
protected override void OnClose (TimeSpan timeout)
{
if (State == CommunicationState.Closed)
return;
base.OnClose (timeout);
// The channels are kept open when the creator channel listener is closed.
// http://blogs.msdn.com/drnick/archive/2006/03/22/557642.aspx
listener_manager.UnregisterListener (ChannelDispatcher, timeout);
}
// immediately stop accepting channel.
public override bool CancelAsync (TimeSpan timeout)
{
try {
CurrentAsyncResult.AsyncWaitHandle.WaitOne (TimeSpan.Zero);
} catch (TimeoutException) {
}
return true;
}
}
}
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