如何获取 WCF Web 服务请求的 XML SOAP 请求？

我认为您的意思是您希望在客户端查看 XML，而不是在服务器上跟踪它。在这种情况下，您的答案在我上面链接的问题中，也在 How to Inspect or Modify Messages on the Client 中。但是，由于那篇文章的 .NET 4 版本缺少其 C#，并且 .NET 3.5 示例中存在一些混淆（如果不是错误的话），因此这里为了您的目的对其进行了扩展。

您可以使用 IClientMessageInspector 在消息发出之前截取消息：

using System.ServiceModel.Dispatcher;
public class MyMessageInspector : IClientMessageInspector
{ }

该接口中的方法 BeforeSendRequest 和 AfterReceiveReply 允许您访问请求和回复。要使用检查器，您需要将其添加到 IEndpointBehavior：

using System.ServiceModel.Description;
public class InspectorBehavior : IEndpointBehavior
{
    public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
    {
        clientRuntime.MessageInspectors.Add(new MyMessageInspector());
    }
}

您可以将该接口的其他方法保留为空实现，除非您也想使用它们的功能。阅读操作指南以获取更多详细信息。

实例化客户端后，将行为添加到端点。使用示例 WCF 项目中的默认名称：

ServiceReference1.Service1Client client = new ServiceReference1.Service1Client();
client.Endpoint.Behaviors.Add(new InspectorBehavior());
client.GetData(123);

在 MyMessageInspector.BeforeSendRequest() 中设置断点； request.ToString() 被重载以显示 XML。

如果您要操作消息，则必须处理消息的副本。有关详细信息，请参阅 Using the Message Class。

感谢 Zach Bonham's answer 在另一个问题上找到这些链接。

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选项1

使用消息跟踪/记录。

看看 here 和 here。

选项 2

您始终可以使用 Fiddler 查看 HTTP 请求和响应。

选项 3

使用 System.Net tracing。

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我只是想将此添加到金伯利的答案中。也许它可以节省一些时间并避免因未实现 IEndpointBehaviour 接口所需的所有方法而导致的编译错误。

此致

尼基

    /*
        // This is just to illustrate how it can be implemented on an imperative declarared binding, channel and client.

        string url = "SOME WCF URL";
        BasicHttpBinding wsBinding = new BasicHttpBinding();                
        EndpointAddress endpointAddress = new EndpointAddress(url);

        ChannelFactory<ISomeService> channelFactory = new ChannelFactory<ISomeService>(wsBinding, endpointAddress);
        channelFactory.Endpoint.Behaviors.Add(new InspectorBehavior());
        ISomeService client = channelFactory.CreateChannel();
    */    
        public class InspectorBehavior : IEndpointBehavior
        {
            public void AddBindingParameters(ServiceEndpoint endpoint, System.ServiceModel.Channels.BindingParameterCollection bindingParameters)
            {
                // No implementation necessary  
            }

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

            public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
            {
                // No implementation necessary  
            }

            public void Validate(ServiceEndpoint endpoint)
            {
                // No implementation necessary  
            }  

        }

        public class MyMessageInspector : IClientMessageInspector
        {
            public object BeforeSendRequest(ref Message request, IClientChannel channel)
            {
                // Do something with the SOAP request
                string request = request.ToString();
                return null;
            }

            public void AfterReceiveReply(ref System.ServiceModel.Channels.Message reply, object correlationState)
            {
                // Do something with the SOAP reply
                string replySoap = reply.ToString();
            }
        }

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OperationContext.Current.RequestContext.RequestMessage 

在处理请求期间，此上下文是可访问的服务器端。这不适用于单向操作

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我们可以简单地跟踪请求消息。

OperationContext context = OperationContext.Current;

if (context != null && context.RequestContext != null)

{

Message msg = context.RequestContext.RequestMessage;

string reqXML = msg.ToString();

}

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我在 ASP.NET 兼容模式下使用以下 IIS 托管解决方案。归功于 Rodney Viana 的MSDN blog。

在 appSettings 下的 web.config 中添加以下内容：

<add key="LogPath" value="C:\\logpath" />
<add key="LogRequestResponse" value="true" />

将您的 global.asax.cs 替换为以下内容（同时修复命名空间名称）：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;

using System.Text;
using System.IO;
using System.Configuration;

namespace Yournamespace
{
    public class Global : System.Web.HttpApplication
    {
        protected static bool LogFlag;
        protected static string fileNameBase;
        protected static string ext = "log";

        // One file name per day
        protected string FileName
        {
            get
            {
                return String.Format("{0}{1}.{2}", fileNameBase, DateTime.Now.ToString("yyyy-MM-dd"), ext);
            }
        }

        protected void Application_Start(object sender, EventArgs e)
        {
            LogFlag = bool.Parse(ConfigurationManager.AppSettings["LogRequestResponse"].ToString());
            fileNameBase = ConfigurationManager.AppSettings["LogPath"].ToString() + @"\C5API-";   
        }

        protected void Session_Start(object sender, EventArgs e)
        {

        }

        protected void Application_BeginRequest(object sender, EventArgs e)
        {
            if (LogFlag) 
            {                
                // Creates a unique id to match Rquests with Responses
                string id = String.Format("Id: {0} Uri: {1}", Guid.NewGuid(), Request.Url);
                FilterSaveLog input = new FilterSaveLog(HttpContext.Current, Request.Filter, FileName, id);
                Request.Filter = input;
                input.SetFilter(false);
                FilterSaveLog output = new FilterSaveLog(HttpContext.Current, Response.Filter, FileName, id);
                output.SetFilter(true);
                Response.Filter = output;
            }
        }

        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {

        }

        protected void Application_Error(object sender, EventArgs e)
        {

        }

        protected void Session_End(object sender, EventArgs e)
        {

        }

        protected void Application_End(object sender, EventArgs e)
        {

        }
    }

    class FilterSaveLog : Stream
    {

        protected static string fileNameGlobal = null;
        protected string fileName = null;

        protected static object writeLock = null;
        protected Stream sinkStream;
        protected bool inDisk;
        protected bool isClosed;
        protected string id;
        protected bool isResponse;
        protected HttpContext context;

        public FilterSaveLog(HttpContext Context, Stream Sink, string FileName, string Id)
        {
            // One lock per file name
            if (String.IsNullOrWhiteSpace(fileNameGlobal) || fileNameGlobal.ToUpper() != fileNameGlobal.ToUpper())
            {
                fileNameGlobal = FileName;
                writeLock = new object();
            }
            context = Context;
            fileName = FileName;
            id = Id;
            sinkStream = Sink;
            inDisk = false;
            isClosed = false;
        }

        public void SetFilter(bool IsResponse)
        {


            isResponse = IsResponse;
            id = (isResponse ? "Reponse " : "Request ") + id;

            //
            // For Request only read the incoming stream and log it as it will not be "filtered" for a WCF request
            //
            if (!IsResponse)
            {
                AppendToFile(String.Format("at {0} --------------------------------------------", DateTime.Now));
                AppendToFile(id);

                if (context.Request.InputStream.Length > 0)
                {
                    context.Request.InputStream.Position = 0;
                    byte[] rawBytes = new byte[context.Request.InputStream.Length];
                    context.Request.InputStream.Read(rawBytes, 0, rawBytes.Length);
                    context.Request.InputStream.Position = 0;

                    AppendToFile(rawBytes);
                }
                else
                {
                    AppendToFile("(no body)");
                }
            }

        }

        public void AppendToFile(string Text)
        {
            byte[] strArray = Encoding.UTF8.GetBytes(Text);
            AppendToFile(strArray);

        }

        public void AppendToFile(byte[] RawBytes)
        {
            bool myLock = System.Threading.Monitor.TryEnter(writeLock, 100);


            if (myLock)
            {
                try
                {

                    using (FileStream stream = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                    {
                        stream.Position = stream.Length;
                        stream.Write(RawBytes, 0, RawBytes.Length);
                        stream.WriteByte(13);
                        stream.WriteByte(10);

                    }

                }
                catch (Exception ex)
                {
                    string str = string.Format("Unable to create log. Type: {0} Message: {1}\nStack:{2}", ex, ex.Message, ex.StackTrace);
                    System.Diagnostics.Debug.WriteLine(str);
                    System.Diagnostics.Debug.Flush();


                }
                finally
                {
                    System.Threading.Monitor.Exit(writeLock);


                }
            }


        }


        public override bool CanRead
        {
            get { return sinkStream.CanRead; }
        }

        public override bool CanSeek
        {
            get { return sinkStream.CanSeek; }
        }

        public override bool CanWrite
        {
            get { return sinkStream.CanWrite; }
        }

        public override long Length
        {
            get
            {
                return sinkStream.Length;
            }
        }

        public override long Position
        {
            get { return sinkStream.Position; }
            set { sinkStream.Position = value; }
        }

        //
        // For WCF this code will never be reached
        //
        public override int Read(byte[] buffer, int offset, int count)
        {
            int c = sinkStream.Read(buffer, offset, count);
            return c;
        }

        public override long Seek(long offset, System.IO.SeekOrigin direction)
        {
            return sinkStream.Seek(offset, direction);
        }

        public override void SetLength(long length)
        {
            sinkStream.SetLength(length);
        }

        public override void Close()
        {

            sinkStream.Close();
            isClosed = true;
        }

        public override void Flush()
        {

            sinkStream.Flush();
        }

        // For streamed responses (i.e. not buffered) there will be more than one Response (but the id will match the Request)
        public override void Write(byte[] buffer, int offset, int count)
        {
            sinkStream.Write(buffer, offset, count);
            AppendToFile(String.Format("at {0} --------------------------------------------", DateTime.Now));
            AppendToFile(id);
            AppendToFile(buffer);
        }

    }
}

它应该使用请求和响应 XML 在文件夹 LogPath 中创建日志文件。

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还有另一种查看 XML SOAP 的方法 - custom MessageEncoder。与 IClientMessageInspector 的主要区别在于它在较低级别上工作，因此它捕获原始字节内容，包括任何格式错误的 xml。

为了使用这种方法实现跟踪，您需要将标准 textMessageEncoding 与 custom message encoder 包装为新的 binding element，并将该自定义绑定应用到 config 中的端点。

您还可以查看我在项目中的示例 - wrapping textMessageEncoding、日志记录 encoder、自定义绑定 element 和 config。

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