https://bz.apache.org/bugzilla/show_bug.cgi?id=63932

--- Comment #8 from Michael Osipov <micha...@apache.org> ---
(In reply to Konstantin Kolinko from comment #6)
> (In reply to Mark Thomas from comment #5)
> > Please take care, as Julian did, to be specific about whether you are
> > talking about weak or strong validators.
> > 
> > RFC 7232 states (section 2.1)
> > <quote>[...]</quote>
> > 
> > So the Default servlet (that only ever sets a weak ETag) is fine. As is the
> > WebDAV servlet.
> 
> +1
> 
> > Where things get "interesting" is when resources set their own, strong ETag.
> > It looks to me that the simplest solution would be for the container
> > provided compression to check for the presence of a strong ETag and, if it
> > finds one, prepend the weakness indicator to the ETag if it is going to
> > compress the resource.
> 
> Interesting idea. But I think such feature has to be documented. A server
> administrator should be aware that changing a Connector setting will change
> behaviour of a web application in that way as well. (Changing strong ETag to
> a weak one may affect performance of caches.)
> 
> Another possible solution is to do not compress a response if a strong ETag
> is encountered. The same what we do when a response is already compressed.
> 
> https://github.com/apache/tomcat/blob/9.0.29/java/org/apache/coyote/
> CompressionConfig.java#L203

That sounds like an option. WDYT about adding a suffix and removing it on the
fly like mod_deflate should do?


I get the feeling that compression configuration must be moved sooner or later
to a subelement <Compression> beneath a connector.

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