ASP.NET IHttpModule

IHttpModule接口的定义:向实现类提供模块初始化和处置事件。它包含2个方法:Dispose()和Init();

自定义IHttpModule接口
实现一个自定义的IHttpModule接口需要2个步骤:

1)实现一个继承了IHttpModule接口的类

2)在Web.config文件中注册这个自定义HttpModule

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print?01 public class CustomerModule:IHttpModule

02    {

03        #region IHttpModule 成员

04        public void Dispose()

05        {

06              

07        }

08        public void Init(HttpApplication context)

09        {

10            context.BeginRequest += new EventHandler(context_BeginRequest);

11            context.EndRequest += new EventHandler(context_EndRequest);

12        }

13        void context_BeginRequest(object sender, EventArgs e)

14        {

15            HttpApplication application = (HttpApplication)sender;

16            application.Context.Response.Write("自定义ModuleRequest开始");

17        }

18        void context_EndRequest(object sender, EventArgs e)

19        {

20            HttpApplication application = (HttpApplication)sender;

21            application.Context.Response.Write("自定义ModuleRequest结束");

22        }

23        #endregion

24    }

 

web.config

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print?1 <httpModules>

2   <add name="customerModule" type="WebApplication3.CustomerModule, WebApplication3"/>

3 </httpModules>

ASP.NET 内置的HttpModule
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print?1 <FONT color=#7b7d62>在C:\Windows\Microsoft.NET\Framework\v2.0.50727\CONFIG\web.config下有很多ASP.NET内置的HttpMoudle默认是加载的如果你不想加载其中的一些可以Remove掉这样可以提高一些性能如:</FONT>

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print?1 <remove name="WindowsAuthentication"/>

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print?1 内置的如下:

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print?01 <httpModules>

02     <add name="OutputCache" type="System.Web.Caching.OutputCacheModule"/>

03     <add name="Session" type="System.Web.SessionState.SessionStateModule"/>

04     <add name="WindowsAuthentication" type="System.Web.Security.WindowsAuthenticationModule"/>

05     <add name="FormsAuthentication" type="System.Web.Security.FormsAuthenticationModule"/>

06     <add name="PassportAuthentication" type="System.Web.Security.PassportAuthenticationModule"/>

07     <add name="RoleManager" type="System.Web.Security.RoleManagerModule"/>

08     <add name="UrlAuthorization" type="System.Web.Security.UrlAuthorizationModule"/>

09     <add name="FileAuthorization" type="System.Web.Security.FileAuthorizationModule"/>

10     <add name="AnonymousIdentification" type="System.Web.Security.AnonymousIdentificationModule"/>

11     <add name="Profile" type="System.Web.Profile.ProfileModule"/>

12     <add name="ErrorHandlerModule" type="System.Web.Mobile.ErrorHandlerModule, System.Web.Mobile, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>

13     <add name="ServiceModel" type="System.ServiceModel.Activation.HttpModule, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

14 </httpModules>

Global.asax与HttpModule
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print?1 <FONT color=#7b7d62>在ASP.NET中Global.asax是一个全局文件,他可以注册应用程序和Session事件,还可以注册HttpModule中暴露的事件(包括内置的HttpModule和自定义的HttpModule),有2点注意事项:</FONT>

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print?1 <FONT color=#7b7d62>1)每当一个Http Request到达时,应用程序事件都要出发遍,但是Application_Start和Application_End仅在第一个资源文件被访问时触发。</FONT>

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print?1 <FONT color=#7b7d62>2)HttpModule无法注册和响应Session 事件,Session事件只能在Global.asax中注册</FONT>

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print?01 public class CustomerModule:IHttpModule

02 {

03     //自定义暴露的事件

04     public event EventHandler ExposedEvent;

05     

06     #region IHttpModule 成员

07     public void Dispose()

08     {

09           

10     }

11     public void Init(HttpApplication context)

12     {

13         context.BeginRequest += new EventHandler(context_BeginRequest);

14         context.EndRequest += new EventHandler(context_EndRequest);

15     }

16     void context_BeginRequest(object sender, EventArgs e)

17     {

18         HttpApplication application = (HttpApplication)sender;

19         application.Context.Response.Write("自定义ModuleRequest开始");

20     }

21     void context_EndRequest(object sender, EventArgs e)

22     {

23         HttpApplication application = (HttpApplication)sender;

24         application.Context.Response.Write("自定义ModuleRequest结束");

25         //触发事件

26         OnExposedEvent(new EventArgs());

27     }

28     #endregion

29       

30     protected void OnExposedEvent( EventArgs e)

31     {

32         if (ExposedEvent!=null)

33         {

34             ExposedEvent(this, e);

35         }

36     }

37 }

 

在Global.asax中添加这样的代码

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print?1 protected void customerModule_ExposedEvent(object sender, EventArgs e)

2 {

3     Response.Write("来自Global.asax");

4 }

 

其中Global.asax中事件名的定义是:模块名_事件名。其中模块名是你在Web.config中注册的模块名称

posted @ 2012-08-07 00:58  沐雪架构师  阅读(211)  评论(0编辑  收藏  举报