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Posted to docs@httpd.apache.org by Eric Covener <co...@gmail.com> on 2013/08/23 22:31:57 UTC
drop canned deflate config?
Is there any sense in maintaining the netscape 4 workarounds in the
sample deflate config in 2.4 and later?
They end up setting a Vary on User-Agent which is terrible on caches.
I recently assisted a user who skipped the Vary and they ended up
corrupting caches instead.
http://httpd.apache.org/docs/2.4/mod/mod_deflate.html
# Netscape 4.x has some problems...
BrowserMatch ^Mozilla/4 gzip-only-text/html
# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4\.0[678] no-gzip
# MSIE masquerades as Netscape, but it is fine
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
# Don't compress images
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
# Make sure proxies don't deliver the wrong content
Header append Vary User-Agent env=!dont-vary
In 2.2, I would add a warning about caches, but leave the canned example.
--
Eric Covener
covener@gmail.com
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Re: drop canned deflate config?
Posted by Igor Galić <i....@brainsware.org>.
+1
----- Original Message -----
> Am Montag, 26. August 2013, 10:15:19 schrieb Daniel Lescohier:
> > This article recommends not doing BrowserMatches for http
> > compression any more. E.g., IE was fixed in XP Service Pack 2 in
> > year 2004.
> >
> > http://zoompf.com/blog/2012/02/lose-the-wait-http-compression
> >
> > It is also interesting to read about the problem with the 'deflate'
> > codec, with the result being to always use 'gzip' codec, not
> > 'deflate' codec.
>
> I have seen deflate related problems with fully patched IE6 much later
> than 2004, more like 2009 or so. But I would still think that the time
> to add work-arounds for IE6 or even older browsers is long past. I am
> +1 to removing them all from 2.4.
>
> > On Fri, Aug 23, 2013 at 4:31 PM, Eric Covener <co...@gmail.com>
> wrote:
> > > Is there any sense in maintaining the netscape 4 workarounds in
> > > the
> > > sample deflate config in 2.4 and later?
> > >
> > > They end up setting a Vary on User-Agent which is terrible on
> > > caches. I recently assisted a user who skipped the Vary and they
> > > ended up corrupting caches instead.
> > >
> > > http://httpd.apache.org/docs/2.4/mod/mod_deflate.html
> > >
> > > # Netscape 4.x has some problems...
> > > BrowserMatch ^Mozilla/4 gzip-only-text/html
> > >
> > > # Netscape 4.06-4.08 have some more problems
> > > BrowserMatch ^Mozilla/4\.0[678] no-gzip
> > >
> > > # MSIE masquerades as Netscape, but it is fine
> > > BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
> > > # Don't compress images
> > > SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip
> > > dont-vary
> > >
> > > # Make sure proxies don't deliver the wrong content
> > > Header append Vary User-Agent env=!dont-vary
> > >
> > > In 2.2, I would add a warning about caches, but leave the canned
> > > example.
> > >
> > > --
> > > Eric Covener
> > > covener@gmail.com
>
--
Igor Galić
Tel: +43 (0) 664 886 22 883
Mail: i.galic@brainsware.org
URL: http://brainsware.org/
GPG: 6880 4155 74BD FD7C B515 2EA5 4B1D 9E08 A097 C9AE
Re: drop canned deflate config?
Posted by Stefan Fritsch <sf...@sfritsch.de>.
Am Montag, 26. August 2013, 10:15:19 schrieb Daniel Lescohier:
> This article recommends not doing BrowserMatches for http
> compression any more. E.g., IE was fixed in XP Service Pack 2 in
> year 2004.
>
> http://zoompf.com/blog/2012/02/lose-the-wait-http-compression
>
> It is also interesting to read about the problem with the 'deflate'
> codec, with the result being to always use 'gzip' codec, not
> 'deflate' codec.
I have seen deflate related problems with fully patched IE6 much later
than 2004, more like 2009 or so. But I would still think that the time
to add work-arounds for IE6 or even older browsers is long past. I am
+1 to removing them all from 2.4.
> On Fri, Aug 23, 2013 at 4:31 PM, Eric Covener <co...@gmail.com>
wrote:
> > Is there any sense in maintaining the netscape 4 workarounds in
> > the
> > sample deflate config in 2.4 and later?
> >
> > They end up setting a Vary on User-Agent which is terrible on
> > caches. I recently assisted a user who skipped the Vary and they
> > ended up corrupting caches instead.
> >
> > http://httpd.apache.org/docs/2.4/mod/mod_deflate.html
> >
> > # Netscape 4.x has some problems...
> > BrowserMatch ^Mozilla/4 gzip-only-text/html
> >
> > # Netscape 4.06-4.08 have some more problems
> > BrowserMatch ^Mozilla/4\.0[678] no-gzip
> >
> > # MSIE masquerades as Netscape, but it is fine
> > BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
> > # Don't compress images
> > SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip
> > dont-vary
> >
> > # Make sure proxies don't deliver the wrong content
> > Header append Vary User-Agent env=!dont-vary
> >
> > In 2.2, I would add a warning about caches, but leave the canned
> > example.
> >
> > --
> > Eric Covener
> > covener@gmail.com
Re: drop canned deflate config?
Posted by Daniel Lescohier <da...@cbsi.com>.
This article recommends not doing BrowserMatches for http compression any
more. E.g., IE was fixed in XP Service Pack 2 in year 2004.
http://zoompf.com/blog/2012/02/lose-the-wait-http-compression
It is also interesting to read about the problem with the 'deflate' codec,
with the result being to always use 'gzip' codec, not 'deflate' codec.
On Fri, Aug 23, 2013 at 4:31 PM, Eric Covener <co...@gmail.com> wrote:
> Is there any sense in maintaining the netscape 4 workarounds in the
> sample deflate config in 2.4 and later?
>
> They end up setting a Vary on User-Agent which is terrible on caches.
> I recently assisted a user who skipped the Vary and they ended up
> corrupting caches instead.
>
> http://httpd.apache.org/docs/2.4/mod/mod_deflate.html
>
> # Netscape 4.x has some problems...
> BrowserMatch ^Mozilla/4 gzip-only-text/html
>
> # Netscape 4.06-4.08 have some more problems
> BrowserMatch ^Mozilla/4\.0[678] no-gzip
>
> # MSIE masquerades as Netscape, but it is fine
> BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
> # Don't compress images
> SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary
>
> # Make sure proxies don't deliver the wrong content
> Header append Vary User-Agent env=!dont-vary
>
> In 2.2, I would add a warning about caches, but leave the canned example.
>
> --
> Eric Covener
> covener@gmail.com
>