What happens when aspx page is requested from browser ?, DOT NET Programming

The steps that occur when we request a ASPX page are as follows:-

1) The browser sends the request to the webserver. Now  assume that the webserver at the other end is IIS.

2) Once the IIS receives the request he looks on which engine the request is served. Whenever I mean engine that means the DLL who can parse this page or compile and send a response back to the browser. Which request is to map is decided by the file extension of the page requested.

Depending on the file extension some mapping are as follows:

1) .aspx, for the ASP.NET Web pages,

2).asmx, for the ASP.NET Web services,

3).config, for the ASP.NET configuration files,

4).ashx, for the custom ASP.NET HTTP handlers

5).rem, for remoting the resources

6)Etc

You also can configure the extension mapping to which engine can route by using the IIS engine.

1833_ASPX page.png

For example an ASP page will be sent to the old classic ASP.DLL to compile. While the .ASPX pages will be routed to the ASP.NET engine for compilation.

7) We will see how an ASP.NET page that is ASPX pages generation sequence occurs. Once IIS passes the Request to the ASP.NET engine page has to go through two section HTTP module section and HTTP handler section. Both of this section has their own work to be completed in order that the page is properly compiled and sent to the IIS. The HTTP modules inspect the incoming request and depending on that they can change their internal workflow of the request. The HTTP handler actually compiles the page and generates the output. If you see your machine.config file you will see the following section of HTTP modules.

d name="OutputCache" type="System.Web.Caching.OutputCacheModule" />

d name="Session" type="System.Web.SessionState.SessionStateModule" />

d name="WindowsAuthentication" type="System.Web.Security.WindowsAuthenticationModule" />

d name="PassportAuthentication" type="System.Web.Security.PassportAuthenticationModule" />

d name="UrlAuthorization" type="System.Web.Security.UrlAuthorizationModule" />

d name="FileAuthorization" type="System.Web.Security.FileAuthorizationModule" />

d name="ErrorHandlerModule" type="System.Web.Mobile.ErrorHandlerModule, System.Web.Mobile, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /

> 

The mapping above will show which functionality is to be handled by which Namespace. For e.g. FormsAthuentication is handled by "System.Web. Security.FormsAuthenticationModule". If you see at the web.config section HTTP module is where the authentication and authorization happens.

d verb="*" path="*.vjsproj" type="System.Web.HttpForbiddenHandler" />

d verb="*" path="*.java" type="System.Web.HttpForbiddenHandler" />

d verb="*" path="*.jsl" type="System.Web.HttpForbiddenHandler" />

d verb="*" path="trace.axd" type="System.Web.Handlers.TraceHandler" />

d verb="*" path="*.aspx" type="System.Web.UI.PageHandlerFactory" />

d verb="*" path="*.ashx" type="System.Web.UI.SimpleHandlerFactory" />

...

Depending on the File extension handler it decides which Namespace will generate the output. e.g.  All .ASPX extension files will be compiled by the System.Web.UI.PageHandlerFactory

Once the file is done it will be send back again to the HTTP modules and from there to IIS and then to the browser.

 698_IIS flow.png

 Figure:-IIS flow from various sections.

Posted Date: 9/22/2012 6:50:08 AM | Location : United States







Related Discussions:- What happens when aspx page is requested from browser ?, Assignment Help, Ask Question on What happens when aspx page is requested from browser ?, Get Answer, Expert's Help, What happens when aspx page is requested from browser ? Discussions

Write discussion on What happens when aspx page is requested from browser ?
Your posts are moderated
Related Questions
What are the advantages of Distributed Processing? Benefits of distributed programming are:- a. Security/Encapsulation b. Faster Problem solving c. Distributed databas

What is the AppFabric component? The AppFabric component is used to make access control and dole out messages across clouds and enterprises. It has a service-oriented architect

ASP.NET/MSSQL/ MVC completing backend solution + integrating with frontend. Project Description: System is used for tracking company's activities through several projects by

Bug Prediction and Correction Project Description: The project is about the prediction of bugs and fixes the bug in the sample program using costriage algorithm. All the requ

Need a K2 Blackpearl workflows help Need a K2 Blackpearl workflows experienced developer to integrate in SharePoint 2010 and 2013. The workflow integrates with Navision 5 provid

In which statement the LINQ query is executed? A LINQ query is executed in the For every statement in Visual Basic and in the for each statement in C#.

show the dot net topic

Develop a Earnings Calculator for my Paid to Click Website Project Description: I want a calculator which will show my members how much they could earn, with value per click,

The Full form of CLR is Common Language Runtime and it is  the heart of the .NET framework. All Languages have its own runtime and its the responsibility of the runtime to take car

What is a cloud? A cloud is a combination of hardware, storage, networks, services, and interfaces that helps in delivering computing as a service. It has generally three users