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HttpExpires Metabase Property

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Applies To: Windows Server 2003, Windows Server 2003 with SP1

The HttpExpires property specifies the expiration of HTML document content by returning the value to the browser in the HTML file header. The browser compares the given value with the current date to determine whether to display a cached page or to request an updated page from the server. This property can be made relative, or dynamic, by using the format D, #SecondsUntilExpiration, with 0xFFFFFFFF indicating no expiration date. It can also be absolute, with the format S,ValidGMTstring.

Attribute Name Attribute Value

XML Data Type

String

WMI Data Type

String

ADSI Data Type

String

ABO Data Type

String

ABO Metabase Identifier

MD_HTTP_EXPIRES

Attributes

INHERIT

Default Value

d, 0x15180

MetaFlagsEx

CACHE_PROPERTY_MODIFIED

User Type

IIS_MD_UT_FILE

ID

6002

Configurable Locations

You can configure this property at the following locations in the IIS metabase.

Metabase Path IIS Admin Object Type

/LM/W3SVC/n/ROOT /LM/W3SVC/n/ROOT/virtual_directory_name

IIsWebVirtualDir

/LM/W3SVC/n

IIsWebServer

/LM/W3SVC

IIsWebService

/LM/W3SVC/n/ROOT/file_name /LM/W3SVC/n/ROOT/virtual_directory_name/file_name

IIsWebFile

/LM/W3SVC/n/ROOT/physical_directory_name /LM/W3SVC/n/virtual_directory_name/physical_directory_name

IIsWebDirectory

Code Example

For general code examples, see Code Examples to Configure Metabase Properties.