public HttpListenerContext EndGetContext(IAsyncResult asyncResult)
{
CheckDisposed();
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
ListenerAsyncResult ares = asyncResult as ListenerAsyncResult;
if (ares == null)
{
throw new ArgumentException("Wrong IAsyncResult.", "asyncResult");
}
if (ares.EndCalled)
{
throw new ArgumentException("Cannot reuse this IAsyncResult");
}
ares.EndCalled = true;
if (!ares.IsCompleted)
{
ares.AsyncWaitHandle.WaitOne();
}
lock (wait_queue)
{
int idx = wait_queue.IndexOf(ares);
if (idx >= 0)
{
wait_queue.RemoveAt(idx);
}
}
HttpListenerContext context = ares.GetContext();
context.ParseAuthentication(SelectAuthenticationScheme(context));
return(context); // This will throw on error.
}
public IAsyncResult BeginGetContext(AsyncCallback callback, Object state)
{
CheckDisposed();
if (!listening)
{
throw new InvalidOperationException("Please, call Start before using this method.");
}
ListenerAsyncResult ares = new ListenerAsyncResult(callback, state);
// lock wait_queue early to avoid race conditions
lock (wait_queue)
{
lock (ctx_queue)
{
HttpListenerContext ctx = GetContextFromQueue();
if (ctx != null)
{
ares.Complete(ctx, true);
return ares;
}
}
wait_queue.Add(ares);
}
return ares;
}
internal void Complete(HttpListenerContext context, bool synch)
{
if (forward != null)
{
forward.Complete(context, synch);
return;
}
this.synch = synch;
this.context = context;
lock (locker)
{
AuthenticationSchemes schemes = context.Listener.SelectAuthenticationScheme(context);
if ((schemes == AuthenticationSchemes.Basic || context.Listener.AuthenticationSchemes == AuthenticationSchemes.Negotiate) && context.Request.Headers["Authorization"] == null)
{
context.Response.StatusCode = 401;
context.Response.Headers["WWW-Authenticate"] = schemes + " realm=\"" + context.Listener.Realm + "\"";
context.Response.OutputStream.Close();
IAsyncResult ares = context.Listener.BeginGetContext(cb, state);
this.forward = (ListenerAsyncResult)ares;
lock (forward.locker)
{
if (handle != null)
{
forward.handle = handle;
}
}
ListenerAsyncResult next = forward;
for (int i = 0; next.forward != null; i++)
{
if (i > 20)
{
Complete(new HttpListenerException(400, "Too many authentication errors"));
}
next = next.forward;
}
}
else
{
completed = true;
this.synch = false;
if (handle != null)
{
handle.Set();
}
if (cb != null)
{
ThreadPool.UnsafeQueueUserWorkItem(InvokeCB, this);
}
}
}
}
internal void Complete(HttpListenerContext context, bool synch)
{
if (forward != null)
{
forward.Complete(context, synch);
return;
}
this.synch = synch;
this.context = context;
lock (locker)
{
AuthenticationSchemes schemes = context.Listener.SelectAuthenticationScheme(context);
if ((schemes == AuthenticationSchemes.Basic || context.Listener.AuthenticationSchemes == AuthenticationSchemes.Negotiate) && context.Request.Headers["Authorization"] == null)
{
context.Response.StatusCode = 401;
context.Response.Headers["WWW-Authenticate"] = schemes + " realm=\"" + context.Listener.Realm + "\"";
context.Response.OutputStream.Close();
IAsyncResult ares = context.Listener.BeginGetContext(cb, state);
this.forward = (ListenerAsyncResult)ares;
lock (forward.locker)
{
if (handle != null)
{
forward.handle = handle;
}
}
ListenerAsyncResult next = forward;
for (int i = 0; next.forward != null; i++)
{
if (i > 20)
{
Complete(new HttpListenerException(400, "Too many authentication errors"));
}
next = next.forward;
}
}
else
{
completed = true;
this.synch = false;
if (handle != null)
{
handle.Set();
}
if (cb != null)
{
ThreadPool.UnsafeQueueUserWorkItem(InvokeCB, this);
}
}
}
}
