WCF路由服务IClientMessageInspector --> BeforeSendRequest 未调用

Question

在发送到后端服务之前，我需要为 WCF 路由服务中的每条消息添加 HTTP 标头。我已经实现了下面的课程。但是，当我调试时，不会调用“BeforeSendRequest”，因此不会添加 HTTP 标头 ic。

我注意到调用了“AfterReceiveRequest”，并且添加了 HTTP 标头，但发现标头没有发送到后端服务器。

我需要在调用“BeforeSendRequest”时添加，但是，这不会触发。

public class RouterMessageLogger : BehaviorExtensionElement, IClientMessageInspector, IEndpointBehavior, IDispatchMessageInspector 
{    

    public override Type BehaviorType
    { 
        get 
        {
            return typeof(RouterMessageLogger);
        } 
    }        
    protected override object CreateBehavior()
    {
        return new RouterMessageLogger();
    }


    #region IClientMessageInspector Members
    **public object BeforeSendRequest(ref Message request, IClientChannel channel) 
    {
        Message MyMsg = request;
        this.AddHTTPHeader(ref request);
        //_Logging.LogMessage("Routing message to service");
        return null;
    }**
    public void AfterReceiveReply(ref Message reply, object correlationState)
    {
        Message MyMsg = reply;
        //_Logging.LogMessage("Response from service received");
    }    
    #endregion    

    #region IDispatchMessageInspector Members    
    public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
    {
        Message MyMsg = request;

        this.AddHTTPHeader( ref request);
        //_Logging.LogMessage("Message received from client"); 
        return request;
    }    
    public void BeforeSendReply(ref Message reply, object correlationState)
    {
        Message MyMsg = reply;
        this.AddHTTPHeader(ref reply);
        //_Logging.LogMessage("Sending response to client");
    }    
    #endregion

    #region IEndpointBehavior Members    
    public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
    {
        bindingParameters.Add(this); 
        //return;
    }    
    public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
    {        
        clientRuntime.MessageInspectors.Add(this);
        clientRuntime.CallbackDispatchRuntime.ImpersonateCallerForAllOperations = true;

    }    
    public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
    {        
        endpointDispatcher.DispatchRuntime.MessageInspectors.Add(this);
    }    
    public void Validate(ServiceEndpoint endpoint)
    {
        return;
    }
}

Answer 1

该问题通过以下解决方案解决。

禁用您要路由到的服务或端点（在路由配置中）的 SOAPProcessingBehavior。此链接告诉您如何执行此操作： http://msdn.microsoft.com/ en-us/library/ee816919.aspx