<p>The contents of any file with a <code>.asis</code> extension
will then be sent by Apache to the client with almost no
- changes. Clients will need HTTP headers to be attached, so do
- not forget them. A Status: header is also required; the data
- should be the 3-digit HTTP response code, followed by a textual
- message.</p>
+ changes. In particular, HTTP headers are derived from the file
+ itself according to <module>mod_cgi</module> rules, so an asis
+ file must include valid headers, and may also use the CGI
+ Status: header to determine the HTTP response code.</p>
<p>Here's an example of a file whose contents are sent <em>as
is</em> so as to tell the client that a file has