//
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// ListenerAsyncResult.cs
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// Copied from System.Net.ListenerAsyncResult
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//
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// Authors:
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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// Copyright (c) 2005 Ximian, Inc (http://www.ximian.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Net;
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using System.Threading;
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namespace WebSocketSharp.Net {
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class ListenerAsyncResult : IAsyncResult
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{
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static WaitCallback InvokeCB = new WaitCallback (InvokeCallback);
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AsyncCallback cb;
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bool completed;
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HttpListenerContext context;
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Exception exception;
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ListenerAsyncResult forward;
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ManualResetEvent handle;
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object locker;
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object state;
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bool synch;
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internal bool EndCalled;
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internal bool InGet;
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public ListenerAsyncResult (AsyncCallback cb, object state)
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{
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this.cb = cb;
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this.state = state;
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this.locker = new object();
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}
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public object AsyncState {
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get {
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if (forward != null)
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return forward.AsyncState;
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return state;
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}
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}
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public WaitHandle AsyncWaitHandle {
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get {
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if (forward != null)
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return forward.AsyncWaitHandle;
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lock (locker) {
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if (handle == null)
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handle = new ManualResetEvent (completed);
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}
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return handle;
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}
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}
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public bool CompletedSynchronously {
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get {
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if (forward != null)
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return forward.CompletedSynchronously;
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return synch;
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}
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}
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public bool IsCompleted {
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get {
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if (forward != null)
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return forward.IsCompleted;
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lock (locker) {
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return completed;
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}
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}
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}
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static void InvokeCallback (object o)
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{
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ListenerAsyncResult ares = (ListenerAsyncResult) o;
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if (ares.forward != null) {
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InvokeCallback (ares.forward);
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return;
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}
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try {
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ares.cb (ares);
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} catch {
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}
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}
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internal void Complete (Exception exc)
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{
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if (forward != null) {
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forward.Complete (exc);
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return;
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}
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exception = exc;
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if (InGet && (exc is ObjectDisposedException))
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exception = new HttpListenerException (500, "Listener closed");
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lock (locker) {
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completed = true;
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if (handle != null)
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handle.Set ();
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if (cb != null)
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ThreadPool.UnsafeQueueUserWorkItem (InvokeCB, this);
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}
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}
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internal void Complete (HttpListenerContext context)
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{
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Complete (context, false);
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}
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internal void Complete (HttpListenerContext context, bool synch)
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{
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if (forward != null) {
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forward.Complete (context, synch);
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return;
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}
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this.synch = synch;
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this.context = context;
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lock (locker) {
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AuthenticationSchemes schemes = context.Listener.SelectAuthenticationScheme (context);
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if ((schemes == AuthenticationSchemes.Basic || context.Listener.AuthenticationSchemes == AuthenticationSchemes.Negotiate) && context.Request.Headers ["Authorization"] == null) {
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context.Response.StatusCode = 401;
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context.Response.Headers ["WWW-Authenticate"] = schemes + " realm=\"" + context.Listener.Realm + "\"";
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context.Response.OutputStream.Close ();
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IAsyncResult ares = context.Listener.BeginGetContext (cb, state);
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this.forward = (ListenerAsyncResult) ares;
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lock (forward.locker) {
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if (handle != null)
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forward.handle = handle;
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}
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ListenerAsyncResult next = forward;
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for (int i = 0; next.forward != null; i++) {
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if (i > 20)
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Complete (new HttpListenerException (400, "Too many authentication errors"));
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next = next.forward;
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}
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} else {
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completed = true;
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if (handle != null)
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handle.Set ();
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if (cb != null)
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ThreadPool.UnsafeQueueUserWorkItem (InvokeCB, this);
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}
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}
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}
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internal HttpListenerContext GetContext ()
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{
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if (forward != null)
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return forward.GetContext ();
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if (exception != null)
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throw exception;
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return context;
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}
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}
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}
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