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From "Steve Bardsley" <SBards...@rlwinc.com>
Subject RE: [users@httpd] resubmit: mod_deflate with chunked gzipped input
Date Sat, 13 Oct 2007 04:43:16 GMT


> -----Original Message-----
> From: Steve Bardsley [mailto:SBardsley@rlwinc.com]
> Sent: Friday, October 12, 2007 6:23 PM
> > -----Original Message-----
> > From: Nick Kew [mailto:nick@webthing.com]
> > Sent: Friday, October 12, 2007 5:54 AM
> >
> > On Thu, 11 Oct 2007, William A. Rowe, Jr. wrote:
> > > Nick Kew wrote:
> > > > On Thu, 11 Oct 2007, Steve Bardsley wrote:
> > > >
> > > >> [Here's a cleaned up resubmittal hoping it's more digestible.]
> > > >>
> > > >> Is mod_deflate.c unreliable for inflating gzipped and chunked
> input?
> > > >
> > > > Chunked is irrelevant: the dechunking filter runs in font of
> > mod_deflate.
> > > > It's possible there's a bug, but we don't know it.
> > >
> > > UHM... Nick, you just fixed this bug yourself 2 weeks ago :)
> >
> > Erm, that was a bug in the inflate output filter.  OP here spoke
> > of inflating incoming POSTed data.  Different filter.  Also unlikely
> > the same bug would manifest in a pull filter.
> >
> 
> I've attached a patch for mod_deflate.c (version 581198 in SVN).  Let
me
> know if you want a different format, but
>     patch -p0 <mod_deflate_581198.patch
> should do the trick.
> 
> We strongly suggest there is a problem handling the gzip footer while
> inflating input data. The original code does not seem to acquire the
> footer properly in all cases. The changes ensure the footer is
properly
> acquired.
> 
> This patch has run for over 24 hours without error.  The previous
> version would only run from 2-5 hours before errors occurred under
> identical conditions (loading, data, etc).  Again, the errors *always*
> occurred coincident with the "FIXME" section of code (line 953).
> 

Guys, please ignore the previous patch. There's still a problem. It's
possibly due to cleansing of debug messages. I'll be sure we get the
next one right. Sorry for the wasted bandwidth.

Regards,
Steve


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