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//
// AspNetReplyChannel.cs
//
// Author:
// Ankit Jain <jankit@novell.com>
//
// Copyright (C) 2006 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.IO;
using System.Net;
using System.ServiceModel;
using System.Text;
using System.Threading;
using System.Web;
namespace System.ServiceModel.Channels
{
internal class AspNetReplyChannel : HttpReplyChannel
{
AspNetChannelListener<IReplyChannel> listener;
List<HttpContext> waiting = new List<HttpContext> ();
HttpContext http_context;
AutoResetEvent wait;
public AspNetReplyChannel (AspNetChannelListener<IReplyChannel> listener)
: base (listener)
{
this.listener = listener;
}
internal void CloseContext ()
{
if (http_context == null)
return;
try {
listener.HttpHandler.EndRequest (listener, http_context);
} finally {
http_context = null;
}
}
void ShutdownPendingRequests ()
{
lock (waiting)
foreach (HttpContext ctx in waiting)
try {
listener.HttpHandler.EndRequest (listener, ctx);
} catch {
}
}
protected override void OnAbort ()
{
ShutdownPendingRequests ();
CloseContext ();
}
protected override void OnClose (TimeSpan timeout)
{
base.OnClose (timeout);
ShutdownPendingRequests ();
CloseContext ();
}
public override bool TryReceiveRequest (TimeSpan timeout, out RequestContext context)
{
try {
return TryReceiveRequestCore (timeout, out context);
} catch (Exception ex) {
// FIXME: log it
Console.WriteLine ("AspNetReplyChannel caught an error: " + ex);
throw;
}
}
bool TryReceiveRequestCore (TimeSpan timeout, out RequestContext context)
{
context = null;
if (waiting.Count == 0 && !WaitForRequest (timeout))
return false;
lock (waiting) {
if (waiting.Count > 0) {
http_context = waiting [0];
waiting.RemoveAt (0);
}
}
if (http_context == null)
// Though as long as this instance is used
// synchronously, it should not happen.
return false;
Message msg;
var req = http_context.Request;
if (req.HttpMethod == "GET") {
msg = Message.CreateMessage (Encoder.MessageVersion, null);
} else {
//FIXME: Do above stuff for HttpContext ?
int maxSizeOfHeaders = 0x10000;
msg = Encoder.ReadMessage (
req.InputStream, maxSizeOfHeaders);
if (Encoder.MessageVersion.Envelope == EnvelopeVersion.Soap11) {
string action = GetHeaderItem (req.Headers ["SOAPAction"]);
if (action != null)
msg.Headers.Action = action;
}
}
// FIXME: prop.SuppressEntityBody
msg.Headers.To = req.Url;
msg.Properties.Add ("Via", LocalAddress.Uri);
msg.Properties.Add (HttpRequestMessageProperty.Name, CreateRequestProperty (req.HttpMethod, req.Url.Query, req.Headers));
context = new AspNetRequestContext (this, msg, http_context);
return true;
}
/*
public override bool WaitForRequest (TimeSpan timeout)
{
if (http_context == null)
http_context = listener.HttpHandler.WaitForRequest (listener, timeout);
return http_context != null;
}
*/
public override bool WaitForRequest (TimeSpan timeout)
{
if (wait != null)
throw new InvalidOperationException ("Another wait operation is in progress");
try {
wait = new AutoResetEvent (false);
listener.ListenerManager.GetHttpContextAsync (timeout, HttpContextAcquired);
if (wait != null) // in case callback is done before WaitOne() here.
return wait.WaitOne (timeout, false);
return waiting.Count > 0;
} finally {
wait = null;
}
}
void HttpContextAcquired (HttpContextInfo ctx)
{
if (wait == null)
throw new InvalidOperationException ("WaitForRequest operation has not started");
var sctx = (AspNetHttpContextInfo) ctx;
if (State == CommunicationState.Opened && ctx != null)
waiting.Add (sctx.Source);
var wait_ = wait;
wait = null;
wait_.Set ();
}
}
}
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