HTTPFilter 的例子

最新推荐文章于 2023-04-02 14:17:55 发布

原创最新推荐文章于 2023-04-02 14:17:55 发布 · 258 阅读

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本文介绍了一个自定义的HTTPFilter模块，该模块通过记录应用程序的初始化、请求开始及错误等事件来实现日志记录功能。文章详细展示了如何创建并使用这个模块来收集客户端信息和异常详情。

using System;
using System.Web;
using System.Diagnostics;

namespace HDI
{
public class HTTPFilter : IHttpModule
{

    System.IO.StreamWriter fileWriter;
    HttpApplication applicationContext;
    EventHandler beginRequestEventHandler;
    String fileName;

    public void Init(HttpApplication context)
    {
      //Store file name for later use.
      fileName = context.Context.Request.PhysicalApplicationPath + "HTTPFilter.txt";

      //Open file and write information.
      fileWriter = new System.IO.StreamWriter(fileName, true);
      fileWriter.WriteLine(System.DateTime.Now.ToString("MM.dd.yyyy HH:mm:ss:ffffff"));
      fileWriter.WriteLine("Init");
      fileWriter.Flush();
      fileWriter.Close();

context.Error += (new EventHandler(this.Application_err));

      //Store for access in other events.
      applicationContext = context;
      beginRequestEventHandler = new System.EventHandler(this.OnBeginRequest);
      applicationContext.BeginRequest += beginRequestEventHandler;
    }

public void Dispose()
{

      //Open file and write information.
      fileWriter = new System.IO.StreamWriter(fileName, true);
      fileWriter.WriteLine(System.DateTime.Now.ToString("MM.dd.yyyy HH:mm:ss:ffffff"));
      fileWriter.WriteLine("Dispose");
      fileWriter.Flush();
      fileWriter.Close();

      //Clean-up.
      applicationContext.BeginRequest -= beginRequestEventHandler;
      beginRequestEventHandler = null;
    }

      protected void OnBeginRequest(object sender, EventArgs e)
      {
          //Open file and write information.
          fileWriter = new System.IO.StreamWriter(fileName, true);
          fileWriter.WriteLine(System.DateTime.Now.ToString("MM.dd.yyyy HH:mm:ss:ffffff"));
          fileWriter.WriteLine("OnBeginRequest");
          fileWriter.WriteLine(applicationContext.Context.Request.UserAgent);
          fileWriter.WriteLine(applicationContext.Context.Request.UserHostAddress);
          fileWriter.WriteLine(applicationContext.Context.Request.Url.ToString());
          fileWriter.Flush();
          fileWriter.Close();
      }

      protected void Application_err(object sender, EventArgs e)
      {
          //Open file and write information.
          fileWriter = new System.IO.StreamWriter(fileName, true);
          fileWriter.WriteLine(System.DateTime.Now.ToString("MM.dd.yyyy HH:mm:ss:ffffff"));
          fileWriter.WriteLine( applicationContext.Context.Error.Message+applicationContext.Context.AllErrors.ToString());

//Context.Server.GetLastError()
          fileWriter.Flush();
          fileWriter.Close();
      }

}
}