我有一个附加自定义IServiceBehavior的WCF服务,用于返回客户端的特定错误 . 当我使用TCP消息安全性启用此代码时,我收到服务超时 .
您可以在下面看到完整的客户端和服务器代码,以重现错误 .
服务器代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.ServiceModel.Channels;
namespace TestWCFServer
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("SERVER");
NetTcpBinding binding = new NetTcpBinding();
binding.Security.Mode = SecurityMode.Message; //If you remove this line the code works!!!!
Uri address = new Uri("net.tcp://localhost:8184/");
// Create the ServiceHost.
using (ServiceHost host = new ServiceHost(typeof(HelloWorldService)))
{
host.AddServiceEndpoint(typeof(IHelloWorldService), binding, address);
host.Description.Behaviors.Add(new MyErrorhandlerBehavior());
host.Open();
Console.WriteLine("The service is ready at {0}", address);
Console.WriteLine("Press to stop the service.");
Console.ReadLine();
// Close the ServiceHost.
host.Close();
}
}
}
[ServiceContract]
public interface IHelloWorldService
{
[OperationContract]
string SayHello(string name);
}
public class HelloWorldService : IHelloWorldService
{
public string SayHello(string name)
{
if (name == null)
throw new ArgumentNullException("name");
return string.Format("Hello, {0}", name);
}
}
class MyErrorhandlerBehavior : IServiceBehavior, IErrorHandler
{
#region IServiceBahvior
public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, System.Collections.ObjectModel.Collection endpoints, BindingParameterCollection bindingParameters)
{
}
public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
foreach (ChannelDispatcher chanDisp in serviceHostBase.ChannelDispatchers)
{
chanDisp.ErrorHandlers.Add(this);
}
}
public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
}
#endregion
#region IErrorHandler Members
public bool HandleError(Exception error)
{
return true;
}
public void ProvideFault(Exception error,MessageVersion ver, ref Message msg)
{
FaultException fe = new FaultException(error.Message);
MessageFault fault = fe.CreateMessageFault();
msg = Message.CreateMessage(ver, fault, "net.tcp://localhost:8184/fault");
}
#endregion
}
}
客户代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
namespace TestWCFClient
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("CLIENT");
try
{
NetTcpBinding binding = new NetTcpBinding();
binding.Security.Mode = SecurityMode.Message; //If you remove this line the code works!!!!
Uri address = new Uri("net.tcp://localhost:8184/");
EndpointAddress endpoint = new EndpointAddress(address);
HelloWorldServiceClient client = new HelloWorldServiceClient(binding, endpoint);
Console.WriteLine("Calling client with a valid parameter...");
Console.WriteLine(client.SayHello("Davide"));
Console.WriteLine("OK");
Console.WriteLine("Calling client with an invalid parameter...");
Console.WriteLine(client.SayHello(null)); //This call causes the timeout when Security is set to Message
Console.WriteLine("OK");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.WriteLine("Press enter to exit");
Console.ReadLine();
}
}
[ServiceContract]
public interface IHelloWorldService
{
[OperationContract]
string SayHello(string name);
}
class HelloWorldServiceClient : System.ServiceModel.ClientBase, IHelloWorldService
{
public HelloWorldServiceClient(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress address) :
base(binding, address)
{ }
public string SayHello(string name)
{
return base.Channel.SayHello(name);
}
}
}
如果我删除客户端和服务器上的 binding.Security.Mode = SecurityMode.Message;
行,则异常被正确转换,客户端可以正常查看它 .
在WCF日志中,我看到以下消息:
没有为具有'net.tcp://localhost:8184/fault'操作的消息指定签名消息部分 .
安全协议无法保护传出消息 .
有关如何解决这个问题的任何想法?似乎我必须签署/加密错误消息,但我不知道如何...
如果我使用传输安全性,代码将按预期工作 .
谢谢!
2 回答
回复可能有点迟,但我有同样的问题,我想出来了:
您需要在接口方法上定义
FaultContract
以及OperationContract
. 看看here .此外,您的错误 Contract 对象需要与Action命名空间具有相同的命名空间 .
Sooooooooooo痛苦但终于想通了,现在就开始工作了 .
就我而言,问题出在名称空间中 . 我用这个替换了ProvideFault方法:
请注意
null
参数 .还要考虑使用错误的命名空间,异常未正确序列化 .