c# - 从请求上下文中添加和检索数据

Question

我正在尝试将 api key 附加到 OperationContext 传出消息 header ，如下所示:

    public static void AddApikeyToHeader(string apikey, IContextChannel channel, string address)
    {
        using (OperationContextScope scope = new OperationContextScope(channel))
        {
            MessageHeader header = MessageHeader.CreateHeader("apikey", address, apikey);
            OperationContext.Current.OutgoingMessageHeaders.Add(header);

        }
    }

但是我不知道如何在服务器端检索 header 。我正在使用服务授权管理器，我获得了当前的操作上下文并尝试像这样检索 header :

    public string GetApiKey(OperationContext operationContext)
    {
        var request = operationContext.RequestContext.RequestMessage;

        var prop = (HttpRequestMessageProperty)request.Properties[HttpRequestMessageProperty.Name];

        return prop.Headers["apikey"];
    }

但那里没有附加 apikey header 。此外，在调试时，当我检查 operationContext 时，我似乎无法在任何地方看到我的 apikey header 。谁能看出我哪里出错了？

Answer 1

您可以通过这种方式添加自定义 header :

using (ChannelFactory<IMyServiceChannel> factory = 
       new ChannelFactory<IMyServiceChannel>(new NetTcpBinding()))
      {
       using (IMyServiceChannel proxy = factory.CreateChannel(...))
       {
          using ( OperationContextScope scope = new OperationContextScope(proxy) )
          {
             Guid apiKey = Guid.NewGuid();
             MessageHeader<Guid> mhg = new MessageHeader<Guid>(apiKey);
             MessageHeader untyped = mhg.GetUntypedHeader("apiKey", "ns");
             OperationContext.Current.OutgoingMessageHeaders.Add(untyped);

             proxy.DoOperation(...);
          }
       }                    
    }

和服务端，你可以得到这样的标题:

Guid apiKey = 
OperationContext.Current.IncomingMessageHeaders.GetHeader<Guid>("apiKey", "ns");