学步园

在做项目的performance问题时候，为了方便跟踪各个页面的postback或者callback的花费时间，写了一个简单的httpmodule，用来打印访问花费时间。

使用的时候将下边这个类编译成一个dll，在web.config里配置好，再打开debugview就可以了。

配置

  <httpModules>
      <clear />
   <add name="TracingModule" type="PerformanceTracing.TracingModule,PerformanceTracing"/>

.....

</httpModules>

代码

 

using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Diagnostics;

namespace PerformanceTracing
{
public class TracingModule : IHttpModule
    {
#region IHttpModule Members

public void Dispose()
        {
        }

public void Init(HttpApplication context)
        {
            context.BeginRequest += new EventHandler(context_BeginRequest);
            context.EndRequest += new EventHandler(context_EndRequest);
        }

private string getFilePath(object sender)
        {
string strPath = (((HttpApplication)sender)).Request.FilePath;

if (strPath != null && strPath.EndsWith("aspx"))
            {
return strPath.Substring(strPath.LastIndexOf("/"));
            }

return string.Empty;
        }

void context_EndRequest(object sender, EventArgs e)
        {
string fileName = getFilePath(sender);
if (fileName.EndsWith("aspx"))
            {
                Stopwatch perfmonWatch =
                    HttpContext.Current.Items["Stopwatch"] as Stopwatch;

if (perfmonWatch != null)
                {
                    perfmonWatch.Stop();
string msg = "Page name: " + fileName + ". The total response time: "
+ perfmonWatch.Elapsed.TotalSeconds + "s. IsCallBack: " + 
                                   (HttpContext.Current.Request.Form["__CALLBACKPARAM"] != null).ToString();
                    Trace.Write(msg);
                }
            }
        }

void context_BeginRequest(object sender, EventArgs e)
        {
if ((((HttpApplication)sender)).Request.FilePath.EndsWith("aspx"))
            {
                Stopwatch perfmonWatch = new Stopwatch();
                HttpContext.Current.Items["Stopwatch"] = perfmonWatch;
                perfmonWatch.Start();
            }
        }

#endregion
    }
}