Custom modules : what's the behavior of mod_deflate ?

[Pierre Lindenbaum]

(cross-posted on SO: http://stackoverflow.com/questions/24486594 )


I wrote a custom module for as described in: 
http://httpd.apache.org/docs/2.4/developer/modguide.html

    ap_rprintf(r, "Hello, world!");

I've been asked about the behavior of mod_deflate 
http://httpd.apache.org/docs/2.2/mod/mod_deflate.html .

Will response to the client produced by my module will be compressed by 
mod_deflate if the client accepts the compression with Accept-Encoding: 
gzip ?

If my response is already gzipped , can I prevent mod_deflate to work ?

Do you have any reference/link about this ?

Thanks

Pierre