Topic Path: Symbol Reference > Classes > TIdEntityHeaderInfo Class > TIdEntityHeaderInfo Properties > CacheControl Property
ContentsIndexHome
PreviousUpNext
TIdEntityHeaderInfo.CacheControl Property

Specifies the HTTP Cache-Control general message header directives.

property CacheControl: String;

CacheControl is a String property that contains HTTP Cache-Control general message header directives in an HTTP request or response. CacheControl indicates the behavior that prevents a cache from adversely interfering with the request or response, and generally override the default caching algorithms. 

Cache directives are unidirectional, and the presence of a directive in a HTTP request does not imply that the same directive will appear in a HTTP response. 

Some common values for CacheControl in a HTTP request include the following: 

 

'no-cache' 
'no-store' 
'max-age=' [delta-seconds] 
'max-stale=' [delta-seconds] 
'min-fresh=' [delta-seconds] 
'no-transform' 
'only-if-cached' 

 

Some common values for CacheControl in a HTTP response include the following: 

 

'public' 
'private' 
'no-cache' 
'no-store' 
'no-transform' 
'must-revalidate' 
'proxy-revalidate' 
'max-age=' [delta-seconds] 
's-maxage=' [delta-seconds] 
CacheControl is not normally implemented for HTTP/1.0, which might 
contain a header value for storage in the the Pragma property that 
contains the value 'no-cache'. 
Copyright 1993-2006, Chad Z. Hower (aka Kudzu) and the Indy Pit Crew. All rights reserved.
Post feedback to the Indy Docs Newsgroup.