c# - 为什么wsa是:To header in my reply message removed by WCF?

Question

我有一个带有 IDispatchMessageInspector 和 BeforeSendReply 方法的 WCF 服务，它修改消息的 WS-Addressing header 。这适用于所有 header ，wsa:To 除外，它正在从回复中删除...

public void BeforeSendReply(ref Message reply, object correlationState)
{
    reply.Headers.To = new Uri("urn:something:something:something"); // Why won't this show up in the response?

    reply.Headers.From = new EndpointAddress("urn:blabla:blabla");
    reply.Headers.MessageId = MessageIDHelper.CreateNew();
    reply.Headers.ReplyTo = new EndpointAddress(Definitions.WSA_REPLYTO_ANONYMOUS);
    reply.Headers.Action = Definitions.WSA_ACTION_SOMETHING_SOMETHING;
}

这导致:

<s:Envelope xmlns:a="http://www.w3.org/2005/08/addressing" xmlns:s="http://www.w3.org/2003/05/soap-envelope">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://xxx.xx/xxx/Messages/1/Send</a:Action>
    <a:RelatesTo>SOME_ID_WHATEVER</a:RelatesTo>
    <a:From>
      <a:Address>urn:xxx.xx:xxx:xxx</a:Address>
    </a:From>
    <a:MessageID>urn:uuid:083b5fb7-ff45-4944-b881-b4c590577408</a:MessageID>
    <a:ReplyTo>
      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
  </s:Header>
  ...
</s:Envelope>

即使 result.ToString() (result = Message 类型)给我:

<s:Envelope xmlns:a="http://www.w3.org/2005/08/addressing" xmlns:s="http://www.w3.org/2003/05/soap-envelope">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://xxx.xx/xxx/Messages/1/Send</a:Action>
    <a:RelatesTo>SOME_ID_WHATEVER</a:RelatesTo>
    <a:To s:mustUnderstand="1">urn:xxx.xx:xxx:xxx<a:To>
    <a:From>
      <a:Address>urn:xxx.xx:xxx:xxx</a:Address>
    </a:From>
    <a:MessageID>urn:uuid:083b5fb7-ff45-4944-b881-b4c590577408</a:MessageID>
    <a:ReplyTo>
      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
  </s:Header>
  ...
</s:Envelope>

那么...为什么 wsa:To header 从我的回复中删除了？

Answer 1

TransportBindingElement.ManualAddressing 的文档属性提供有关寻址行为的一些信息。 IE。如果 ManuelAddressing 的值设置为 false，则发送 channel 将 channel 上配置为 To: addressee 的 EndpointAddress 应用于传出消息。这意味着 channel 对 To: header 的值有发言权。

现在，BeforeSendReply() 在服务级别修改消息的内容，然后将其交给 channel 进行传输。因此，如果 ManuelAddressing 的值为 false， channel 将在消息头中设置自己的 To: 值。

只要 ManuelAddressing 的值设置为 true， channel 就会假定消息已经被寻址并且不会添加任何附加信息。为了将 ManuelAddressing 设置为 True，可以在 web.config 文件中创建自定义绑定(bind):

<customBinding>
  <binding name="customBinding_manualAddressingEnabled">
    <textMessageEncoding />
    <httpTransport manualAddressing="true"/>
  </binding>
</customBinding>