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IHttpServer::AddFragmentToCache Method

  • Article

Adds an HTTP_DATA_CHUNK structure to the cache.

Syntax

virtual HRESULT AddFragmentToCache(  
   HTTP_DATA_CHUNK* pDataChunk,  
   __in WCHAR* pszFragmentName  
) = 0;

Parameters

pDataChunk
[IN] A pointer to an HTTP_DATA_CHUNK structure.

pszFragmentName
[IN] A pointer to a WCHAR value that specifies the fragment to be added to the cache.

Return Value

An HRESULT. Possible values include, but are not limited to, those in the following table.

Value Description
S_OK Indicates that the operation was successful.
E_INVALIDARG Indicates that one of the parameters is not valid.
ERROR_INVALID_PARAMETER Indicates that one of the parameters is not valid.

Remarks

Developers can use the AddFragmentToCache, ReadFragmentFromCache, and RemoveFragmentFromCache methods, respectively, to add HTTP_DATA_CHUNK structures to the fragment cache, or to retrieve and remove HTTP_DATA_CHUNK structures from the cache. These methods give developers a small degree of custom functionality to use the built-in IIS cache for storing and retrieving data fragments in the cache.

Note

Http.sys manages and owns the fragment cache. At any time, Http.sys may override or delete information that you directed to be stored. There is currently no way to lock information in the fragment cache as nonvolatile information.

Requirements

Type Description
Client - IIS 7.0 on Windows Vista
- IIS 7.5 on Windows 7
- IIS 8.0 on Windows 8
- IIS 10.0 on Windows 10
Server - IIS 7.0 on Windows Server 2008
- IIS 7.5 on Windows Server 2008 R2
- IIS 8.0 on Windows Server 2012
- IIS 8.5 on Windows Server 2012 R2
- IIS 10.0 on Windows Server 2016
Product - IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0
- IIS Express 7.5, IIS Express 8.0, IIS Express 10.0
Header Httpserv.h

See Also

IHttpServer Interface
IHttpServer::RemoveFragmentFromCache Method
IHttpServer::ReadFragmentFromCache Method