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From Joshua Slive <>
Subject Re: [users@httpd] environment variable
Date Wed, 04 Sep 2002 22:32:20 GMT
Werner Schalk wrote:
> Hello,
> what does the environment variable
> HTTP_CACHE_CONTROL exactly mean? Where
> can I find additional information about
> the environment variables in general?
> I have already searched the rfc 2616 but
> I did not really find something about this.

The CGI specification will tell you that any environment variable 
starting in HTTP is simply the value of an HTTP Request Header.  So 
HTTP_CACHE_CONTROL contains whatever the client sent in the 
Cache-Control HTTP Header.  For what that contains, see section 14.9 of 


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