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Posted to users@httpd.apache.org by Christophe JAILLET <ch...@wanadoo.fr> on 2019/08/17 19:20:57 UTC
[users@httpd] Re: uncompressing lzw payload
Le 16/08/2019 à 17:33, Mark Lybarger a écrit :
> i'm reading about mod_deflate where it can handle gzipped content sent
> and automatically uncompress the payload. i have embedded clients that
> want to send compressed data over the wire due to bandwidth
> constraints. they can only support LZW compression due to
> library/memory restrictions.
>
> as i read, gzip algroithm can handle lzw content, but before i setup a
> POC to test lzw content decompression via apache mod_deflate, can
> anyone provide insights?
>
> thanks!
> -mark-
Hi,
not sure where you read this, but doc [1] states that "The gzip encoding
is the only one supported".
mod_deflate uses zlib and AFAIK, it does not support LZW.
Where have you read that gzip algroithm can handle lzw content?
CJ
[1]:
http://httpd.apache.org/docs/current/en/mod/mod_deflate.html#supportedencodings
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[users@httpd] Re: uncompressing lzw payload
Posted by Mark Lybarger <ml...@gmail.com>.
Thanks for the reply! I see that deflate only supports gzip algorithm after
looking at the docs and the code. However, gzip utility is able to
uncompress lzw compressed files (.Z). Has there ever been work on an LZW
input filter?
On Sat, Aug 17, 2019 at 3:21 PM Christophe JAILLET <
christophe.jaillet@wanadoo.fr> wrote:
> Le 16/08/2019 à 17:33, Mark Lybarger a écrit :
> > i'm reading about mod_deflate where it can handle gzipped content sent
> > and automatically uncompress the payload. i have embedded clients that
> > want to send compressed data over the wire due to bandwidth
> > constraints. they can only support LZW compression due to
> > library/memory restrictions.
> >
> > as i read, gzip algroithm can handle lzw content, but before i setup a
> > POC to test lzw content decompression via apache mod_deflate, can
> > anyone provide insights?
> >
> > thanks!
> > -mark-
>
> Hi,
>
> not sure where you read this, but doc [1] states that "The gzip encoding
> is the only one supported".
>
> mod_deflate uses zlib and AFAIK, it does not support LZW.
> Where have you read that gzip algroithm can handle lzw content?
>
> CJ
>
> [1]:
>
> http://httpd.apache.org/docs/current/en/mod/mod_deflate.html#supportedencodings
>
>