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 basic methods of Data adapter? The three most commonly used methods of Dataadapter are as follows:- 1)Fill :- It Executes the SelectCommand to fill the DataSet ob

Project Description: Take a CSV of Canadian street addresses. For every address, translate the address into a GPS coordinate. Use the GPS coordinate to test whether or not the a

Project Description: I have a site that's previously fully developed, and need to fix some small problems (Text editor posting error, and a Server error caused by some Nhibernat

Web Service based application: Aims and Objectives Classics Online is a Web-based book and music retailer specialising in pre-1980s hardback

What are the four workflow principles? According to Microsoft, there are four main principles that define the behavior and working of workflows. Developers can use these princi

As you have probably realized by now, Web pages are much more useful when they are dynamic. In Internet terminology, the word dynamic means several things. Primarily, it refers to

What are benefits and limitations of using Cookies? The benefits of using cookies for state management are as follows:- 1)    There is no server resources required as they a

The SQL cache dependencies is a new characteristic in ASP.NET 2.0 which can automatically invalidate a cached data object (like a Dataset) when the related data is modified in the

What is UDDI? The Full form of the UDDI is Universal Description, Discovery and Integration. The directory that can be used to publish and discover public Web Services. If you

Describe the XmlWriter class. The XmlWriter class is used to write XML to a stream, a file, or a Textwriter object. This class works in a forward-only, non-cached manner. You c