// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.IO;
 
namespace System.ServiceModel.Channels
{
    public abstract class StreamUpgradeAcceptor
    {
        protected StreamUpgradeAcceptor()
        {
        }
 
        public abstract bool CanUpgrade(string contentType);
 
        public virtual Stream AcceptUpgrade(Stream stream)
        {
            return EndAcceptUpgrade(BeginAcceptUpgrade(stream, null, null));
        }
 
        public abstract IAsyncResult BeginAcceptUpgrade(Stream stream, AsyncCallback callback, object state);
        public abstract Stream EndAcceptUpgrade(IAsyncResult result);
    }
}