Question

我正在尝试开发一个简单的Windows Forms应用程序，以从最新版本的ESTES ShipmentTracking v1.1 Web服务请求跟踪信息。当我执行请求时，我的程序抛出一个System.ServiceModel.CommunicationException

我正在使用Visual Studio 2019和.NET 4.6.2 C＃Windows Forms应用程序。我使用添加服务引用过程配置了Connected Service，并使用了ESTES_Track命名空间。这是我的基本代码：

ESTES_Track.EstesShipmentTracking_PortTypeClient trackClient = new EstesShipmentTracking_PortTypeClient();
trackClient.ClientCredentials.UserName.UserName = "MYUSERNAME";
trackClient.ClientCredentials.UserName.Password = "MYPASSWORD";
ESTES_Track.search trackSearch = new ESTES_Track.search();
trackSearch.requestID = "TRACK" + DateTime.Now.Ticks.ToString();
trackSearch.pro = "1710394802";
ESTES_Track.shipmentTrackingRequest trackRequest = new shipmentTrackingRequest(trackSearch);
ESTES_Track.shipmentTrackingResponse trackResponse = trackClient.shipmentTracking(trackRequest);

通信异常是：

Error in deserializing body of reply message for operation 'shipmentTracking'
There is an error in XML document (1, 575)
   at System.ServiceModel.Dispatcher.XmlSerializerOperationFormatter.DeserializeBody(XmlDictionaryReader reader, MessageVersion version, XmlSerializer serializer, MessagePartDescription returnPart, MessagePartDescriptionCollection bodyParts, Object[] parameters, Boolean isRequest)
   at System.ServiceModel.Dispatcher.XmlSerializerOperationFormatter.DeserializeBody(XmlDictionaryReader reader, MessageVersion version, String action, MessageDescription messageDescription, Object[] parameters, Boolean isRequest)
   at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeBodyContents(Message message, Object[] parameters, Boolean isRequest)
   at System.ServiceModel.Dispatcher.OperationFormatter.DeserializeReply(Message message, Object[] parameters)
   at System.ServiceModel.Dispatcher.ProxyOperationRuntime.AfterReply(ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   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 EstesTests.ESTES_Track.EstesShipmentTracking_PortType.shipmentTracking(shipmentTrackingRequest request)
   at EstesTests.ESTES_Track.EstesShipmentTracking_PortTypeClient.shipmentTracking(shipmentTrackingRequest request) in C:\tests\EstesTests\Connected Services\ESTES_Track\Reference.cs:line 1394
   at EstesTests.Program.TrackTest() in C:\tests\EstesTests\Program.cs:line 49

-=-=-=-编辑-=-=-=- 我可以使用SoapUI成功处理请求并获得有效的响应。这使我相信我的问题是特定于我的Visual Studio项目的。

我的App.config文件如下：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2" />
    </startup>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="estesrtshipmenttracking_base_ws_provider_soapws_EstesShipmentTracking_Binder">
                  <security mode="Transport">
                    <transport clientCredentialType="Basic"></transport>
                  </security>
                </binding>
            </basicHttpBinding>
        </bindings>
        <client>
            <endpoint address="https://api.estes-express.com:443/ws/estesrtshipmenttracking.base.ws.provider.soapws:EstesShipmentTracking/estesrtshipmenttracking_base_ws_provider_soapws_EstesShipmentTracking_Port"
                binding="basicHttpBinding" bindingConfiguration="estesrtshipmenttracking_base_ws_provider_soapws_EstesShipmentTracking_Binder"
                contract="ESTES_Track.EstesShipmentTracking_PortType" name="estesrtshipmenttracking_base_ws_provider_soapws_EstesShipmentTracking_Port" />
        </client>
    </system.serviceModel>
</configuration>

-=-=-=-编辑-=-=-=- 我将其明确标记为“ ESTES ShipmentTracking v1.1”的原因是，我可以肯定我遇到的问题可能是特定于此特定Web服务的。如果某人已经有使用此Web服务的有效代码示例，则可能包括解决我的问题的方法。另外，我相信其他任何尝试为ESTES开发运输客户端的人也会遇到此问题。

-=-=-=-结论-=-=-=- 我得出结论，响应消息的XML内容不完全符合已发布的v1.1 WSDL模式，并且反序列化异常特定于此Web服务实现版本。我以前的v1.0版本还没有遇到这个问题。

Answer 1

我今天遇到了同样的问题，并将其缩小为几个问题：

eventTimeStamp在时区部分缺少冒号
空字段缺少xsi：nil

我写信给技术支持，但与此同时能够通过使用自定义消息检查器（如此处https://blogs.msdn.microsoft.com/dsnotes/2015/04/14/wcf-simple-way-to-modify-serialized-response/所述）处理响应来使其工作。

您可以像这样将其添加到您的客户端中：

trackClient.Endpoint.Behaviors.Add(new EstesTrackingEndpointBehavior());

希望他们可以在最后解决这个问题。如果出现其他问题，则可以在AfterReceiveReply中为响应添加其他更改：

using System;
using System.IO;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.Xml;

namespace EstesWebService {
    public class EstesTrackingMessageInspector : IClientMessageInspector {
        public void AfterReceiveReply(ref Message reply, object correlationState) {
            var doc = new XmlDocument();
            var ms = new MemoryStream(); 
            var writer = XmlWriter.Create(ms);
            reply.WriteMessage(writer);
            writer.Flush();
            ms.Position = 0;
            doc.Load(ms);

            //fix the XML
            addNil(doc.SelectNodes(".//shipments"));
            foreach (XmlNode node in doc.SelectNodes(".//eventTimeStamp"))
                fixDateTimeFormat(node);

            ms.SetLength(0);
            writer = XmlWriter.Create(ms);
            doc.WriteTo(writer);
            writer.Flush();
            ms.Position = 0;
            var reader = XmlReader.Create(ms);
            reply = Message.CreateMessage(reader, int.MaxValue, reply.Version);
        }

        public object BeforeSendRequest(ref Message request, IClientChannel channel) {
            return null;
        }

        private void addNil(XmlNodeList nodes) {
            foreach (XmlNode node in nodes) {
                if (node.HasChildNodes)
                    addNil(node.ChildNodes);
                else if (string.IsNullOrWhiteSpace(node.InnerText) && node.Attributes != null && node.Attributes.GetNamedItem("xsi:nil") == null) {
                    var attr = node.OwnerDocument.CreateAttribute("xsi", "nil", "http://www.w3.org/2001/XMLSchema-instance");
                    attr.Value = "true";
                    node.Attributes.SetNamedItem(attr);
                }
            }
        }

        private void fixDateTimeFormat(XmlNode node) {
            if (node != null && !string.IsNullOrWhiteSpace(node.InnerText)) {
                DateTimeOffset dt;
                if (DateTimeOffset.TryParse(node.InnerText.Trim(), out dt))
                    node.InnerText = dt.ToString("O");
            }
        }

    }

    public class EstesTrackingEndpointBehavior : IEndpointBehavior {
        public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) {
        }

        public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime) {
            clientRuntime.MessageInspectors.Add(new EstesTrackingMessageInspector());
        }

        public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) {
        }

        public void Validate(ServiceEndpoint endpoint) {
        }
    }
}

ESTES ShipmentTracking v1.1 Web服务，在反序列化操作“ shipmentTracking”的回复消息正文时出错

1 个答案: