使用IClientMessageInspector从WCF soap请求中删除操作节点mustUnderstand

Question

我正在使用我无法访问的WSDL来访问WCF服务,无法修改.对于其中一个请求远程服务正在死亡,因为我们正在发送:

<Action s:mustUnderstand="1"....>

广泛搜索后,我无法找到解决问题的简单方法.所以,在一个典型的消息中:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Header>
    <Action s:mustUnderstand="1" xmlns="http://schemas.microsoft.com/ws/2005/05/addressing/none" />
  </s:Header>
  <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <retrieveBooking xmlns="http://services.rccl.com/Interfaces/RetrieveBooking">
      <OTA_ReadRQ TransactionActionCode="RetrievePrice" SequenceNmbr="1" Version="1" xmlns="http://www.opentravel.org/OTA/2003/05/alpha">

我想我可以删除此节点作为消息检查器的一部分:

internal class MyMessageInspector : IClientMessageInspector
{
   public object BeforeSendRequest(ref Message aRequest, IClientChannel aChannel)
   {
        //Get rid of mustUnderstand Action node
        foreach (MessageHeaderInfo headerInfo in aRequest.Headers.UnderstoodHeaders)
        {
            aRequest.Headers.UnderstoodHeaders.Remove(headerInfo);
        }

        return null;
   }
} 

但是,即使删除了所有元素后aRequest.Headers.UnderstoodHeaders为空,我仍然看到在XML中发出了Action节点.

1. 我需要做些什么来完成这项工作？
2. 我如何获取消息内容,以便在这种情况下我可以检查body标签retrieveBooking的第一个节点的名称？(我只需要针对特定​​消息执行此操作,而不是所有消息)

Answer 1

答案最终非常简单。

public object BeforeSendRequest(ref Message aRequest, IClientChannel aChannel)
{
   //For the CabinDetail message the API provider has requested that we REMOVE the XML action node from the header as it causes their end to fail
   //<s:Header>
   //<Action s:mustUnderstand="1" xmlns="http://schemas.microsoft.com/ws/2005/05/addressing/none" />
   //</s:Header>
   if (aRequest.ToString().Contains("CabinDetail"))
   {
       int headerIndexOfAction = aRequest.Headers.FindHeader("Action", "http://schemas.microsoft.com/ws/2005/05/addressing/none");
       aRequest.Headers.RemoveAt(headerIndexOfAction);
   }

   return null;
}

Answer 2

代替

[System.ServiceModel.OperationContractAttribute(Action ="", ReplyAction="*")]

经过

[System.ServiceModel.OperationContractAttribute(Action ="*", ReplyAction="*")]