asp.net - 如何跟踪 ScriptService WebService 请求？

Question

我有一个 SoapExtension，用于记录所有 SOAP 请求和响应。对于来自使用 MS Soap Toolkit(OnBase 工作流)的应用程序的调用，它工作得很好。但它不适用于 html 页面上的 $.ajax() 调用。这是一个例子:

$.ajax({
    type: "POST",
    url: url,
    data: data,
    contentType: "application/json; charset=utf-8",
    dataType: "json"
});

它正在调用标有 WebService 和 ScriptService 属性的 ASP.NET 3.5 WebService:

[WebService(Namespace = XmlSerializationService.DefaultNamespace)]
[ScriptService]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class DepartmentAssigneeService : WebService
{
    private readonly DepartmentAssigneeController _controller = new DepartmentAssigneeController();

    /// <summary>
    /// Fetches the role items.
    /// </summary>
    /// <returns></returns>
    [WebMethod]
    [SoapLog]
    public ListItem[] FetchDepartmentItems()
    {
        return CreateListItems(_controller.FetchDepartments());
    }
}

以下是 SoapExtension 和 SoapExtensionAttribute 的基础知识:

public class LoggingSoapExtension : SoapExtension, IDisposable { /*...*/ }

[AttributeUsage(AttributeTargets.Method)]
public sealed class SoapLogAttribute : SoapExtensionAttribute { /*...*/ }

我是否缺少一些允许 LoggingSoapExtension 在 $.ajax() 请求上执行的内容？

更新

@克里斯·布兰德斯玛

It might be because you are requesting Json results instead of XML via your web service (dataType: "json"). So the ScriptService attribute is being activated, but you are not sending SOAP messages.

这就解释了为什么 SoapExtension 不起作用。对于使用 ScriptService 进行跟踪有什么建议吗？唯一想到的是 ScriptService 基类，它提供了记录请求的方法。但随后我必须在每个 ScriptService WebService 的每个 WebMethod 中调用该方法(我有很多)。如果可能的话，我想使用像 SoapExtension 属性这样干净简单的东西。

Answer 1

我找到了解决方案。通过使用 IHttpModule，我可以记录来自任何内容(SOAP、JSON、表单等)的请求。在下面的实现中，我选择记录所有 .asmx 和 .ashx 请求。这替换了问题中的 LoggingSoapExtension。

public class ServiceLogModule : IHttpModule
{
    private HttpApplication _application;
    private bool _isWebService;
    private int _requestId;
    private string _actionUrl;

    #region IHttpModule Members

    public void Dispose()
    {
    }

    public void Init(HttpApplication context)
    {
        _application = context;
        _application.BeginRequest += ContextBeginRequest;
        _application.PreRequestHandlerExecute += ContextPreRequestHandlerExecute;
        _application.PreSendRequestContent += ContextPreSendRequestContent;
    }

    #endregion

    private void ContextPreRequestHandlerExecute(object sender, EventArgs e)
    {
        _application.Response.Filter = new CapturedStream(_application.Response.Filter,
                                                          _application.Response.ContentEncoding);
    }

    private void ContextBeginRequest(object sender, EventArgs e)
    {
        string ext = VirtualPathUtility.GetExtension(_application.Request.FilePath).ToLower();
        _isWebService = ext == ".asmx" || ext == ".ashx";

        if (_isWebService)
        {
            ITraceLog traceLog = TraceLogFactory.Create();
            _actionUrl = _application.Request.Url.PathAndQuery;

            StreamReader reader = new StreamReader(_application.Request.InputStream);
            string message = reader.ReadToEnd();
            _application.Request.InputStream.Position = 0;

            _requestId = traceLog.LogRequest(_actionUrl, message);
        }
    }

    private void ContextPreSendRequestContent(object sender, EventArgs e)
    {
        if (_isWebService)
        {
            CapturedStream stream = _application.Response.Filter as CapturedStream;
            if (stream != null)
            {
                ITraceLog traceLog = TraceLogFactory.Create();
                traceLog.LogResponse(_actionUrl, stream.StreamContent, _requestId);
            }
        }
    }
}

我从Capturing HTML generated from ASP.NET借了很多钱.