[thelist] mod_gzip

[Peter VanDijck]

Thanks!
Peter

MarsHall wrote:
>
> Peter...
>
> When mod_gzip is installed and enabled, the HTTP server will send the
> content encoded with gzip compression ONLY IF the requesting user-agent
> has gzip listed in it's "Accept-Encoding" header. Otherwise, the
> connection will proceed without compression. Most modern browsers do
> support gzip.
>
> AFAIK, the module works fine with PHP. It seems like output buffering
> in PHP would be a good practice if your expecting the pages to be
> gzipped on-the-fly...
>
> You need to understand how to install new Apache modules, if mod_gzip
> is not already installed, and edit the httpd.conf file in order to make
> it work (see doc links below). If you only have user-level access to a
> virtual server, this may be a problem... modules must be installed by
> root.
>
> The drawbacks are:
>
> --- processing overhead --- which is minor in most cases and can be
> completely circumvented by pre-gziping files, so that the server just
> sends the compressed file instead of compressing on-the-fly. This
> technique would only work for static files [i.e. not PHP], though.
>
> --- proxy/cache issues --- Apparently, some proxies and caches (that
> read actual HTML content such as meta-tags) do not play well with
> gzip-compressed HTTP content. I am left wondering if those devices
> would munge the page, drop the connection or throw an error?
>
> For unofficial documentation, see:
>         http://www.schroepl.net/projekte/mod_gzip/
>         http://www.darkmere.gen.nz/2000/1105.html
>
> Mars :)
>
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