Question

我正在使用WCF客户端来使用非WCF SOAP 1.2 Web服务。当收到如下所示的SOAP错误时，我收到一个ProtocolException而不是FaultException。通信绑定没有问题，请求正在成功处理。但我无法访问我的WCF客户端中的错误错误。有什么想法吗？

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" xmlns:SOAP-ENC="http://www.w3.org/2003/05/soap-encoding" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:c14n="http://www.w3.org/2001/10/xml-exc-c14n#" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsa5="http://www.w3.org/2005/08/addressing" xmlns:wsr="http://docs.oasis-open.org/wsrf/r-2" xmlns:xmime5="http://www.w3.org/2005/05/xmlmime" xmlns:xop="http://www.w3.org/2004/08/xop/include" xmlns:tt="http://www.onvif.org/ver10/schema" xmlns:wsbf="http://docs.oasis-open.org/wsrf/bf-2" xmlns:wstop="http://docs.oasis-open.org/wsn/t-1" xmlns:ns10="http://www.onvif.org/ver10/events/wsdl/PausableSubscriptionManagerBinding" xmlns:ns3="http://www.onvif.org/ver10/events/wsdl/PullPointSubscriptionBinding" xmlns:ns4="http://www.onvif.org/ver10/events/wsdl/EventBinding" xmlns:tev="http://www.onvif.org/ver10/events/wsdl" xmlns:ns5="http://www.onvif.org/ver10/events/wsdl/SubscriptionManagerBinding" xmlns:ns6="http://www.onvif.org/ver10/events/wsdl/NotificationProducerBinding" xmlns:ns7="http://www.onvif.org/ver10/events/wsdl/NotificationConsumerBinding" xmlns:ns8="http://www.onvif.org/ver10/events/wsdl/PullPointBinding" xmlns:ns9="http://www.onvif.org/ver10/events/wsdl/CreatePullPointBinding" xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2" xmlns:tds="http://www.onvif.org/ver10/device/wsdl" xmlns:ter="http://www.onvif.org/ver10/error" xmlns:timg="http://www.onvif.org/ver20/imaging/wsdl" xmlns:tptz="http://www.onvif.org/ver20/ptz/wsdl" xmlns:trt="http://www.onvif.org/ver10/media/wsdl">
   <SOAP-ENV:Header/>
   <SOAP-ENV:Body>
      <SOAP-ENV:Fault>
         <SOAP-ENV:Code>
            <SOAP-ENV:Value>SOAP-ENV:Sender</SOAP-ENV:Value>
            <SOAP-ENV:Subcode>
               <SOAP-ENV:Value>ter:InvalidArgVal</SOAP-ENV:Value>
               <SOAP-ENV:Subcode>
                  <SOAP-ENV:Value>ter:NoSource</SOAP-ENV:Value>
               </SOAP-ENV:Subcode>
            </SOAP-ENV:Subcode>
         </SOAP-ENV:Code>
         <SOAP-ENV:Reason>
            <SOAP-ENV:Text xml:lang="en">Not exist</SOAP-ENV:Text>
         </SOAP-ENV:Reason>
         <SOAP-ENV:Detail>
            <SOAP-ENV:Text xml:lang="en">The requested VideoSource does not exist.</SOAP-ENV:Text>
         </SOAP-ENV:Detail>
      </SOAP-ENV:Fault>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

System.ServiceModel.ProtocolException

“远程服务器返回了意外响应：（400）错误请求。

    StackTrace  
    "Server stack trace: 
    at System.ServiceModel.Channels.HttpChannelUtilities.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory factory, WebException responseException, ChannelBinding channelBinding)
    at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
    at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
    at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
    at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
    at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
    at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
    at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

    Exception rethrown at [0]: 
    at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
    at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
    at OnvifProxy.ImagingPort.SetImagingSettings(String VideoSourceToken, ImagingSettings20 ImagingSettings, Boolean ForcePersistence)
    at OnvifProxy.ImagingPortClient.SetImagingSettings(String VideoSourceToken, ImagingSettings20 ImagingSettings, Boolean ForcePersistence) in D:\..\Proxies\OvifServices.cs:line 19005
    at Integral.Common.IPCameras.ONVIF.Services.ImagingService.SetImageSettings(String pVideoSourceToken, ImagingSettings20 pImageSettings) in D:\..\Services\ImagingService.cs:line 375"   string

Answer 1

我建议使用Fiddler拦截原始响应。在这些情况下（互操作），最好完全绕过WCF，并在“线上”到达时读取响应消息。尝试通过WCF调试非WCF错误或反序列化错误只会让您头疼。 =）

大多数情况下，查看原始响应会将问题指出像拇指一样疼痛。

Answer 2

我认为您遇到的问题是服务器返回400 HTTP响应代码。显然，Silverlight客户端无法访问响应代码不是200的消息正文。

如果您拥有对服务器的控制权，则可以对其进行修改以发送200响应代码而不是400，但如果您无法控制服务器，则需要修改客户端以接受200以外的响应代码

我找到了一些指令here来更改客户端以使用备用HTTP堆栈。我有同样的问题（但HTTP响应代码500），这解决了问题。您所要做的就是在Silverlight应用程序的开头添加此代码（例如，在MainPage类的构造函数上）：

bool registerResult = WebRequest.RegisterPrefix("http://", WebRequestCreator.ClientHttp);

Answer 3

在生成的代理类中，是否使用IsOneWay = true属性标记了被调用的方法？

如果是，那么就没有接收到SOAP错误的反向通道，但是WCF可以通过其他方式将其恢复，这显示为ProtocolException。据我所知，你需要让IsOneWay = false来获得SOAP错误。

为什么WCF客户端没有接收SOAP Fault为FaultException？

3 个答案: