internal void RegisterContext(HttpListenerContext context)
{
lock (_registry)
_registry[context] = context;
ListenerAsyncResult ares = null;
lock (_waitQueue)
{
if (_waitQueue.Count == 0)
{
lock (_ctxQueue)
_ctxQueue.Add(context);
}
else
{
ares = (ListenerAsyncResult)_waitQueue[0];
_waitQueue.RemoveAt(0);
}
}
ares?.Complete(context);
}
/// <summary>
/// Begins the asynchronous operation of retrieving an HTTP conext
/// </summary>
/// <param name="callback">The callback.</param>
/// <param name="state">The state.</param>
/// <returns></returns>
/// <exception cref="System.InvalidOperationException">Please, call Start before using this method.</exception>
public IAsyncResult BeginGetContext(AsyncCallback callback, object state)
{
CheckDisposed();
if (!IsListening)
throw new InvalidOperationException("Please, call Start before using this method.");
var ares = new ListenerAsyncResult(callback, state);
// lock wait_queue early to avoid race conditions
lock (_waitQueue)
{
lock (_ctxQueue)
{
var ctx = GetContextFromQueue();
if (ctx != null)
{
ares.Complete(ctx, true);
return ares;
}
}
_waitQueue.Add(ares);
}
return ares;
}
internal void Complete(HttpListenerContext context, bool synch)
{
#if AUTHENTICATION
if (_forward != null)
{
_forward.Complete(context, synch);
return;
}
#endif
_synch = synch;
_context = context;
lock (_locker)
{
#if AUTHENTICATION
var 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.Dispose();
var ares = context.Listener.BeginGetContext(_cb, _state);
_forward = (ListenerAsyncResult) ares;
lock (_forward._locker)
{
if (_handle != null)
_forward._handle = _handle;
}
var next = _forward;
for (var i = 0; next._forward != null; i++)
{
if (i > 20)
Complete(new HttpListenerException(400, "Too many authentication errors"));
next = next._forward;
}
}
else
{
#endif
_completed = true;
_synch = false;
_handle?.Set();
if (_cb != null)
ThreadPool.QueueUserWorkItem(_invokeCb, this);
#if AUTHENTICATION
}
#endif
}
}
