SSL Passthrough与WCF或TransportWithMessageCredential在普通HTTP上

Question

我实际上是在关注这篇文章 https://social.msdn.microsoft.com/Forums/vstudio/en-US/87a254c8-e9d1-4d4c-8f62-54eae497423f/how-to-ssl-passthrough-from-bigip?forum=wcf

我已经完成了第1步和第2步，但在实现了在步骤3中讨论的自定义绑定后，我收到了以下错误

无法为此绑定计算Scheme，因为此CustomBinding缺少TransportBindingElement。每个绑定必须至少有一个派生自TransportBindingElement的绑定元素。

我的自定义绑定代码如下：

 UIButton *btn=[[UIButton alloc]initWithFrame:CGRectMake(60, 60, 200, 60)];    
 btn.backgroundColor=[UIColor greenColor];    
 [btn setTitle:@"btn" forState:UIControlStateNormal];    
 [btn addTarget:self action:@selector(clickme:) forControlEvents:UIControlEventTouchUpInside];    
 ...

 - (void) clickme: (UIButton*) sender{
   [self.navController pushViewController:ANOTHER_VIEW_CONTROLLER animated:YES];
 }

我的web.Config如下：

public class MyCustomBinding : Binding
    {
        private HttpTransportBindingElement transport;
        private BinaryMessageEncodingBindingElement encoding;

        public MyCustomBinding()
            : base()
        {
            this.InitializeValue();
        }
        public override BindingElementCollection CreateBindingElements()
        {
            BindingElementCollection elements = new BindingElementCollection();
            elements.Add(this.encoding);
            elements.Add(this.transport);
            return elements;
        }
        public override string Scheme
        {
            get { return this.transport.Scheme; }
        }
        private void InitializeValue()
        {
            this.transport = new HttpTransportBindingElement();
            this.encoding = new BinaryMessageEncodingBindingElement();
        }
    }

    public class MyCustomBindingCollectionElement : BindingCollectionElement
    {
        // type of custom binding class
        public override Type BindingType
        {
            get { return typeof(MyCustomBinding); }
        }

       //  override ConfiguredBindings
        public override ReadOnlyCollection<IBindingConfigurationElement> ConfiguredBindings
        {
            get
            {
                return new ReadOnlyCollection<IBindingConfigurationElement>(
                new List<IBindingConfigurationElement>());
            }
        }

        // return Binding class object
        protected override Binding GetDefault()
        {
            return new MyCustomBinding();
        }

        public override bool ContainsKey(string name) {

            return true;
        }

        protected override bool TryAdd(string name, Binding binding, Configuration config)
        {
            return true;
        }
    }