Handlers Module

HttpContext
- Request
- Response

HttpApplication
- maintaining application-scope methods
- data
- events
- After the HttpApplication object massages the request, it pushes the request through one or more HttpModule objects.

HttpModule

- When an HttpModule is hooked into the pipeline (via an entry in web.config), the ASP.NET runtime calls the module's Init and Dispose methods.
- Init is called when the module attaches itself to the HttpApplication object
- Dispose is called when the module is detached from HttpApplication.

Event	Occurs
AcquireRequestState	When ASP.NET acquires the current state (for example, session state) associated with the current request
AuthenticateRequest	When a security module has established the identity of the user
AuthorizeRequest	When a security module has verified user authorization
BeginRequest	When the first event in the HTTP pipeline chain of execution responds to a request
Disposed	When ASP.NET completes the chain of execution when responding to a request
EndRequest	When the last event in the HTTP pipeline chain of execution responds to a request
Error	When an unhandled exception is thrown
PostRequestHandlerExecute	When the ASP.NET handler (page, XML Web Service) finishes execution
PreRequestHandlerExecute	Just before ASP.NET begins executing a handler such as a page or XML Web Service
PreSendRequestContent	Just before ASP.NET sends content to the client
PreSendRequestHeaders	Just before ASP.NET sends HTTP headers to the client
ReleaseRequestState	After ASP.NET finishes executing all request handlers; also causes state modules to save the current state data
ResolveRequestCache	When ASP.NET completes an authorization event to let the caching modules serve requests from the cache, bypassing execution of the handler (the page or XML Web Service, for example)
UpdateRequestCache	When ASP.NET finishes executing a handler in order to let caching modules store responses that will be used to serve subsequent requests from the cache

<httpmodules>
<add name="MyHttpModule" type="name of the class which implement the interface IHttpModule, path where the class is present, Culture=neutral">

<httpmodules>
<add type="[Namespace.]SeoUrls, [AssemblyName], [Version=x.x.x.x, Culture=neutral, PublicKeyToken=933d439bb833333a]" name="SeoUrls">
</add>

<httpmodules>
<add name="MyHttpModule" type="Secure, App_Code, Culture=neutral">
</add>


<httphandlers>
<add verb="*" path="*.data" type="namespace.classname, assemblyname(I.E. DLL Name)">

<add verb="*" path="xyz.aspx" type="test.MyFactory,HandlerFactoryTest">
</add>

</add></httphandlers></httpmodules></httpmodules></add></httpmodules>