[Log]ASP.NET之HttpModule 事件执行顺序

Posted 2020-08-03 D&J

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ASP.Net下的HttpModule是基于事件的处理模型，这使得我们在选择事件监听和处理的时候有更多选择。下面是对HttpModule有关事件被触发的监测：

有关代码如下

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.htmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Web.SessionState;
using System.Threading;

/// 

///EventTest 的摘要说明
/// 
public class EventTest : IHttpModule, IRequiresSessionState
{
    public EventTest()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    void IHttpModule.Dispose()
    {
        return;
    }

    void IHttpModule.Init(HttpApplication App)
    {
        App.AcquireRequestState += new EventHandler(AcquireRequestState);
        App.BeginRequest += new EventHandler(BeginRequest);
        App.AuthenticateRequest += new EventHandler(AuthenticateRequest);
        App.AuthorizeRequest += new EventHandler(AuthorizeRequest);
        App.Disposed += new EventHandler(Disposed);
        App.EndRequest += new EventHandler(EndRequest);
        App.Error += new EventHandler(Error);
        //App.MapRequestHandler += new EventHandler(MapRequestHandler);
        App.PostAcquireRequestState += new EventHandler(PostAcquireRequestState);
        App.PostAuthenticateRequest += new EventHandler(PostAuthenticateRequest);
        App.PostAuthorizeRequest += new EventHandler(PostAuthorizeRequest);
        //App.PostLogRequest += new EventHandler(PostLogRequest);
        App.PostMapRequestHandler += new EventHandler(PostMapRequestHandler);
        App.PostReleaseRequestState += new EventHandler(PostReleaseRequestState);
        App.PostRequestHandlerExecute += new EventHandler(PostRequestHandlerExecute);
        App.PostResolveRequestCache += new EventHandler(PostResolveRequestCache);
        App.PostUpdateRequestCache += new EventHandler(PostUpdateRequestCache);
        App.PreRequestHandlerExecute += new EventHandler(PreRequestHandlerExecute);
        App.PreSendRequestHeaders += new EventHandler(PreSendRequestHeaders);
        App.PreSendRequestContent += new EventHandler(PreSendRequestContent);
        App.ReleaseRequestState += new EventHandler(ReleaseRequestState);
        App.ResolveRequestCache += new EventHandler(ResolveRequestCache);
        App.UpdateRequestCache += new EventHandler(UpdateRequestCache);
    }

    private void BeginRequest(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：BeginRequest（执行Http请求管线链中第一个事件时发生）");
    }

    private void AcquireRequestState(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：AcquireRequestState(与当前建立会话时发生)");
        if (context.Session["T"] != null)
        {
            response.Write(" + " + context.Session["T"].ToString());
        }
        else
        {
            response.Write(" Session未收到!");
        }
    }

    private void AuthenticateRequest(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：AuthenticateRequest(安全模块建立用户标记时发生)");

    }

    private void AuthorizeRequest(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：AuthorizeRequest(安全模块验证用户授权时发生)");

    }

    private void Disposed(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：Disposed(释放应用时发生)");

    }


    private void EndRequest(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：EndRequest(执行Http请求管线链中最后一个事件时发生)");

    }

    private void Error(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + Error(Error事件时发生)");
    }

    private void PostAcquireRequestState(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PostAcquireRequestState(已经获得当前请求状态时发生)");
        if (context.Session["T"] != null)
        {
            response.Write(" + " + context.Session["T"].ToString());
        }
        else
        {
            response.Write(" Session未收到!");
        }
    }

    private void PostAuthenticateRequest(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PostAuthenticateRequest(已建立用户标识时发生)");
    }

    private void PostAuthorizeRequest(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PostAuthorizeRequest(当前请求的用户已获得授权时发生)");
    }

    private void PostMapRequestHandler(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PostMapRequestHandler(当前请求事件映射到相应事件后发生)");

    }

    private void PostReleaseRequestState(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + PostReleaseRequestState(完成请求事件并且请求状态已存储时发生)");
    }

    private void PostRequestHandlerExecute(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PostRequestHandlerExecute(ASP.Net事件执行完毕时发生)");
    }

    private void PostResolveRequestCache(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PostResolveRequestCache(跳过当前请求并接受来自缓存数据时发生)");
    }

    private void PostUpdateRequestCache(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PostUpdateRequestCache(事件缓存被更新时发生)");

    }

    private void PreRequestHandlerExecute(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PreRequestHandlerExecute(页面事件执行前发生)");

        if (context.Session["T"] != null)
        {
            response.Write(" + " + context.Session["T"].ToString());
        }
        else
        {
            response.Write(" Session未收到!");
        }
    }

    private void PreSendRequestContent(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        //response.Write("
" + time + "  + IHttpModule：PreSendRequestContent(向客户端发送内容之前发生)");

    }

    private void PreSendRequestHeaders(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：PreSendRequestHeaders(向客户端发送HttP头之前发生)");
    }

    private void ReleaseRequestState(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：ReleaseRequestState(事件执行完成之后状态处理)");
    }

    private void ResolveRequestCache(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：ResolveRequestCache(从缓存中发生数据请求时)");
    }
    private void UpdateRequestCache(object sender, EventArgs e)
    {
        HttpApplication application = (HttpApplication)sender;
        HttpContext context = application.Context;
        HttpRequest request = application.Request;
        HttpResponse response = application.Response;
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        response.Write("
" + time + "  + IHttpModule：UpdateRequestCache(时间执行完毕，为缓存新的事件准备)");
    }

}

View Code

需要在web.Config加入

<httpModules>
         
        <add name="Haha" type="EventTest"/>  
<httpModules>

View Code

任意Page的代码（aspx）

protected void Page_Load(object sender, EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_Load");
    }
    protected void TextBox1_TextChanged(object sender, EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：TextBox1_TextChanged");
        Label1.Text = TextBox1.Text;
    }
    protected void TextBox2_TextChanged(object sender, EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：TextBox2_TextChanged");
        Label2.Text = TextBox2.Text;
    }

    private void Page_LoadComplete(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_LoadComplete");
    }

    private void Page_Unload(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        //Response.Write("
" + time + "  + Page_Unload");
    }

    private void Page_PreInit(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_PreInit");
    }

    private void Page_Init(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Session["T"] = "来自Page级：Page_Init" + time;
        Response.Write("
" + time + "  + Page：Page_Init");
    }


    private void Page_InitComplete(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_InitComplete");
    }

    private void Page_PreLoad(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_PreLoad");
    }

    private void Page_PreRender(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_PreRender");
    }

    private void Page_PreRenderComplete(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_PreRenderComplete");
    }

    private void Page_SaveStateComplete(object sender, System.EventArgs e)
    {
        string time = DateTime.Now.ToString() + ":" + DateTime.Now.Millisecond.ToString("000");
        Response.Write("
" + time + "  + Page：Page_SaveStateComplete");
    }

View Code

当Page（aspx）页面事件被加载（首次）被加载后的信息

2009-11-22 18:02:35:828 + IHttpModule：BeginRequest（执行Http请求管线链中第一个事件时发生）
2009-11-22 18:02:35:828 + IHttpModule：AuthenticateRequest(安全模块建立用户标记时发生)
2009-11-22 18:02:35:828 + IHttpModule：PostAuthenticateRequest(已建立用户标识时发生)
2009-11-22 18:02:35:828 + IHttpModule：AuthorizeRequest(安全模块验证用户授权时发生)
2009-11-22 18:02:35:828 + IHttpModule：PostAuthorizeRequest(当前请求的用户已获得授权时发生)
2009-11-22 18:02:35:828 + IHttpModule：ResolveRequestCache(从缓存中发生数据请求时)
2009-11-22 18:02:35:828 + IHttpModule：PostResolveRequestCache(跳过当前请求并接受来自缓存数据时发生)
2009-11-22 18:02:35:859 + IHttpModule：PostMapRequestHandler(当前请求事件映射到相应事件后发生)
2009-11-22 18:02:35:859 + IHttpModule：AcquireRequestState(与当前建立会话时发生) Session未收到!
2009-11-22 18:02:35:859 + IHttpModule：PostAcquireRequestState(已经获得当前请求状态时发生) Session未收到!
2009-11-22 18:02:35:859 + IHttpModule：PreRequestHandlerExecute(页面事件执行前发生) Session未收到!
2009-11-22 18:02:35:875 + Page：Page_PreInit
2009-11-22 18:02:35:875 + Page：Page_Init
2009-11-22 18:02:35:875 + Page：Page_InitComplete
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