1
using System;
2using System.Collections.Generic;
3using System.Text;
4using System.Web;
5namespace HttpModuleTest1
6
{
7
public class Test1Module:IHttpModule
8
{
9 public Test1Module()
10 {
11
}
12 public string ModuleName
13 {
14 get
15 {
16 return "Test1Module";
17 }
18 }
19 public void Init(HttpApplication application)
20 {
21 application.BeginRequest += new EventHandler(myBeginRequest);
22 application.EndRequest += new EventHandler(myEndRequest);
23 application.PreRequestHandlerExecute += new EventHandler(myPreRequestHandlerExecute);
24 application.PostRequestHandlerExecute += new EventHandler(myPostRequestHandlerExecute);
25 application.ReleaseRequestState += new EventHandler(myReleaseRequestState);
26 application.AcquireRequestState += new EventHandler(myAcquireRequestState);
27 application.AuthenticateRequest += new EventHandler(myAuthenticateRequest);
28 application.AuthorizeRequest += new EventHandler(myAuthorizeRequest);
29 application.ResolveRequestCache += new EventHandler(myResolveRequestCache);
30 application.PreSendRequestHeaders += new EventHandler(myPreSendRequestHeaders);
31 application.PreSendRequestContent += new EventHandler(myPreSendRequestContent);
32 }
33 private void myBeginRequest(object source, EventArgs e)
34 {
35 HttpApplication application = (HttpApplication)source;
36 HttpContext context = application.Context;
37 context.Response.Write("Test1Module:Beggining of Request<br>");
38 }
39 private void myEndRequest(object source, EventArgs e)
40 {
41 HttpApplication application = (HttpApplication)source;
42 HttpContext context = application.Context;
43 context.Response.Write("Test1Module:End of Request<br>");
44 }
45 private void myPreRequestHandlerExecute(object source, EventArgs e)
46 {
47 HttpApplication application = (HttpApplication)source;
48 HttpContext context = application.Context;
49 context.Response.Write("Test1Module:Application_RequestHandlerExecute:<br>");
50 }
51 private void myPostRequestHandlerExecute(object source, EventArgs e)
52 {
53 HttpApplication application = (HttpApplication)source;
54 HttpContext context = application.Context;
55 context.Response.Write("Test1Module:Application_PostRequestHandlerExecute:<br>");
56 }
57 private void myReleaseRequestState(object source, EventArgs e)
58 {
59 HttpApplication application = (HttpApplication)source;
60 HttpContext context = application.Context;
61 context.Response.Write("Test1Module:Application_ReleaseRequestState:<br>");
62 }
63 private void myAcquireRequestState(object source, EventArgs e)
64 {
65 HttpApplication application = (HttpApplication)source;
66 HttpContext context = application.Context;
67 context.Response.Write("Test1Module:Application_ReleaseRequestState:<br>");
68 }
69 private void myAuthenticateRequest(object source, EventArgs e)
70 {
71 HttpApplication application = (HttpApplication)source;
72 HttpContext context = application.Context;
73 context.Response.Write("Test1Module:Application_AuthenticateRequest:<br>");
74 }
75 private void myAuthorizeRequest(object source, EventArgs e)
76 {
77 HttpApplication application = (HttpApplication)source;
78 HttpContext context = application.Context;
79 context.Response.Write("Test1Module:Application_AuthorizeRequest:<br>");
80 }
81 private void myResolveRequestCache(object source, EventArgs e)
82 {
83 HttpApplication application = (HttpApplication)source;
84 HttpContext context = application.Context;
85 context.Response.Write("Test1Module:Application_ResolveRequestCache:<br>");
86 }
87 private void myPreSendRequestHeaders(object source, EventArgs e)
88 {
89 HttpApplication application = (HttpApplication)source;
90 HttpContext context = application.Context;
91 context.Response.Write("Test1Module:Application_PreSendRequestHeaders:<br>");
92 }
93 private void myPreSendRequestContent(object source, EventArgs e)
94 {
95 HttpApplication application = (HttpApplication)source;
96 HttpContext context = application.Context;
97 context.Response.Write("Test1Module:Application_PreSendRequestContent:<br>");
98 }
99 public void Dispose()
100 {
101 }
102 }
103
}
然后在web.config里添加，不明白的看注释部分。
<httpModules>
<!--注意我这里的Httplibrary是你添加引用的那个DLL的文件名.Httplibrary.SecurityModules
中前边部分是你那个类的名称空间，后边的是你建的类的名字。-->
<add name=" Test1 " type="Httplibrary.SecurityModules,Httplibrary"/>
<add name=" MultiTest1 " type="HttpModuleTest1.Test1Module, HttpModuleTest1" />
<add name=" MultiTest2" type="HttpModuleTest2.Test2Module, HttpModuleTest2" />
</httpModules>
还是用刚才那个测试页面，我们就可以观察到两个test的执行顺序。
我们具体分析一下就是这样的：
HttpRequest开始->进入HttpModule->HttpModule->
首次截获HttpRequest->HttpModule.BeginRequest->
HttpModule.AuthorizeRequest->HttpModule.ResolveRequestCache->
初始化HttpHandler->建立HttpHandler控制点->HttpModule继续处理。HttpHandler已经建立，此后Session可用->HttpModule.AcquireRequestState
->HttpModule.PreRequestHandlerExecute->进入HttpHandler处理HttpRequest
->HttpHandler->HttpHandler.ProcessRequest->返回HttpModule,HttpHandler结束，Session失效->HttpModule.PostRequestHandlerExecute->HttpModule.ReleaseRequestState->
HttpModule.UpdateRequestCache->HttpModule.EndRequest->HttpModule.PreSendRequestHeaders->HttpModule.PreSendRequestContent->
将处理的数据返回客户端，处理结束。