WCF CustomBehavior 中的错误 "Cannot set null or blank methods on request."

Question

我正在开发一个插入 BizTalk 2010 SendPort 以调用 JSON/REST 服务的 WCF CustomBehavior。 SendPort 是 WCF/Custom，Binding Type=webHttpBinding。

我需要将四个 headers 添加到请求中。

当我在 BeforeSendRequest 方法中包含此代码时：

var newHttpRequestMessageProperty = new HttpRequestMessageProperty
{
    Method = request.Headers.Action,
    QueryString = string.Empty,
    SuppressEntityBody = false,

};

newHttpRequestMessageProperty.Headers.Add("X-ST-PartnerID", partnerIDFromSSO);
newHttpRequestMessageProperty.Headers.Add("X-ST-Token", tokenIDFromSSO);
newHttpRequestMessageProperty.Headers.Add("X-ST-AuthType", "TOKEN");
newHttpRequestMessageProperty.Headers.Add("Accept-Language", "EN");

request.Properties[HttpRequestMessageProperty.Name] = newHttpRequestMessageProperty;

它给我这个错误：

System.ArgumentException: Cannot set null or blank methods on request.
Parameter name: value

Server stack trace: 
   at System.Net.HttpWebRequest.set_Method(String value)
   at System.ServiceModel.Channels.HttpOutput.WebRequestHttpOutput.PrepareHttpSend(Message message)
   at System.ServiceModel.Channels.HttpOutput.BeginSendCore(HttpResponseMessage httpResponseMessage, TimeSpan timeout, AsyncCallback callback, Object state)
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelAsyncRequest.SendWebRequest()
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelAsyncRequest.OnGetWebRequestCompleted(IAsyncResult result)
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelAsyncRequest.BeginSendRequest(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.BeginRequest(Message message, TimeSpan timeout, AsyncCallback callback, Object state)
   at System.ServiceModel.Dispatcher

当我遗漏该代码时，我从合作伙伴的 Web 服务返回了 415，因此我知道我至少做到了。

我所做的与此类似post：

Answer 1

从同事那里，我更改了：

     //Method = request.Headers.Action,
     Method = "POST",

它奏效了……

原因是，当你有一个无效的 "OperationName" 时，request.Headers.Action 有来自 BizTalk 发送端口的整个 CustomAction 字符串：

<BtsActionMapping xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Operation Name="DELETE" Action="DELETE" />
  <Operation Name="GET" Action="GET" />
  <Operation Name="POST" Action="POST" />
</BtsActionMapping>

我正在根据此处的示例对我的代码进行建模： https://biztalkrest.codeplex.com/discussions/657185

在上述修复之后，我突然想到要在编排的逻辑端口中匹配 "Operation Name"，果然，我有 "Post" 而不是 "POST"。呃……所以很明显，当 OperationName 与 CustomAction 操作不匹配时，BizTalk 只是通过……发送整个 CustomAction XML 块……太神奇了……

下图是我从"Post"改成"POST"的地方。

WCF CustomBehavior 中的错误 "Cannot set null or blank methods on request."

Error "Cannot set null or blank methods on request." in WCF CustomBehavior

rest

wcf

biztalk

biztalk-2010

c#-4.0