httpModules Element (ASP.NET Settings Schema)

Configures the HTTP modules within an application. This element can be declared at any level in the configuration hierarchy.

<httpModules> 
   <add... />
   <remove... />
   <clear/>
</httpModules>

Attributes and Elements

The following sections describe attributes, child elements, and parent elements.

Attributes

None.

Child Elements

Element	Description
add	Optional element. Adds an httpModules element to an application.
clear	Optional element. Removes all httpModules element from an application.
remove	Optional element. Removes a reference to an httpModules element. The value must exactly match that of a previous add directive.

Parent Elements

Element	Description
configuration	Specifies the required root element in every configuration file that is used by the common language runtime and the .NET Framework applications.
system.web	Specifies the root element for the ASP.NET configuration section.

Remarks

Default Configuration

The following default httpModules element is configured in the Machine.config file in the .NET Framework version 1.1.

<httpModules>
     <add name="OutputCache" type="System.Web.Caching.OutputCacheModule"/>
     <add name="Session" type="System.Web.SessionState.SessionStateModule"/>
     <add name="WindowsAuthentication" type="System.Web.Security.WindowsAuthenticationModule"/>
     <add name="FormsAuthentication" type="System.Web.Security.FormsAuthenticationModule"/>
     <add name="PassportAuthentication" type="System.Web.Security.PassportAuthenticationModule"/>
     <add name="UrlAuthorization" type="System.Web.Security.UrlAuthorizationModule"/>
     <add name="FileAuthorization" type="System.Web.Security.FileAuthorizationModule"/>
     <add name="ErrorHandlerModule" type="System.Web.Mobile.ErrorHandlerModule, System.Web.Mobile, 
          Version=1.0.5000.0, Culture=neutral, 
          PublicKeyToken=b03f5f7f11d50a3a"/>
</httpModules>

The following default httpModules element is configured in the Machine.config file in the .NET Framework version 1.0.

<httpModules>
     <add name="OutputCache" type="System.Web.Caching.OutputCacheModule" />
     <add name="Session" type="System.Web.SessionState.SessionStateModule" />
     <add name="WindowsAuthentication" type="System.Web.Security.WindowsAuthenticationModule" />
     <add name="FormsAuthentication" type="System.Web.Security.FormsAuthenticationModule" />
     <add name="PassportAuthentication" type="System.Web.Security.PassportAuthenticationModule" />
     <add name="UrlAuthorization" type="System.Web.Security.UrlAuthorizationModule" />
     <add name="FileAuthorization" type="System.Web.Security.FileAuthorizationModule" />
</httpModules>

The following default httpModules element is configured in the root Web.config file in the .NET Framework version 2.0.

<httpModules>
     <add name="OutputCache" type="System.Web.Caching.OutputCacheModule" />
     <add name="Session" type="System.Web.SessionState.SessionStateModule" />
     <add name="WindowsAuthentication" type="System.Web.Security.WindowsAuthenticationModule" />
     <add name="FormsAuthentication" type="System.Web.Security.FormsAuthenticationModule" />
     <add name="PassportAuthentication" type="System.Web.Security.PassportAuthenticationModule" />
     <add name="RoleManager" type="System.Web.Security.RoleManagerModule" />
     <add name="UrlAuthorization" type="System.Web.Security.UrlAuthorizationModule" />
     <add name="FileAuthorization" type="System.Web.Security.FileAuthorizationModule" />
     <add name="AnonymousIdentification" type="System.Web.Security.AnonymousIdentificationModule" />
     <add name="Profile" type="System.Web.Profile.ProfileModule" />
</httpModules>

Example

The following code example demonstrates how to add three HttpModule references to the ASP.NET application.

<configuration>
   <system.web>
      <httpModules>
         <add type="System.Web.Caching.OutputCacheModule" 
              name="OutputCache"/>
         <add type="System.Web.SessionState.SessionStateModule" 
              name="Session"/>
         <add type=Selector, selector.dll"
              name="Selector"/>
      </httpModules>
   </system.web>
</configuration>

Element Information

Configuration section handler	System.Web.Configuration.HttpModulesSection
Configuration member	System.Web.Configuration.SystemWebSectionGroup.HttpModules
Configurable locations	Machine.config Root-level Web.config Application-level Web.config Virtual or physical directory–level Web.config
Requirements	Microsoft Internet Information Services (IIS) version 5.0, 5.1, or 6.0 The .NET Framework version 1.0, 1.1, or 2.0 Microsoft Visual Studio 2003 or Visual Studio 2005

See Also

Tasks

How to: Lock ASP.NET Configuration Settings

Reference

system.web Element (ASP.NET Settings Schema)
<configuration> Element
add Element for httpModules (ASP.NET Settings Schema)
clear Element for httpModules (ASP.NET Settings Schema)
remove Element for httpModules (ASP.NET Settings Schema)
System.Configuration
System.Web.Configuration

Concepts

ASP.NET Configuration Overview
ASP.NET Web Server Controls and Browser Capabilities
Securing ASP.NET Configuration
ASP.NET Configuration Scenarios

Other Resources

ASP.NET Configuration Files
ASP.NET Configuration Settings
General Configuration Settings (ASP.NET)
ASP.NET Configuration API