The infamous to-do list

Jaye Mathisen mrcpu at
Mon Jun 26 06:21:52 UTC 2000

Wouldn't most dial-in users already be using the built-in modem
compression, rendering it a minimal gain?

And users on faster connections (DSL and stuff), the thing cruises down in
almost no time...

On Mon, 26 Jun 2000, Sven Paulus wrote:

> In article <yl3dm3tmpd.fsf at> you wrote:
> |> Future Projects:
> |> * Consider implementing the HEADERS command as discussed rather
> |>   extensively in  [Greg Andruk has a preliminary
> |>   patch.]
> One thing I've been thinking about is adding a support for downloading
> compressed lists. Since the amount of newsgroups is increasing permanently,
> downloading the active and the newsgroups file - which most newsreaders do
> after connecting to an NNTP server for the first time - takes quite some
> time, especially via dialup lines.
> A solution might be an additional NNTP command like ZLIST (or XZLIST), which
> has the following format
>       ZLIST <compression type> <LIST arguments>
> for example "ZLIST COMPRESS active alt.*".
> The answer is something like "215 73844 bytes follow\r\n", followed by 73844
> octets of binary data. After this, the state is back in command mode,
> awaiting the next command.
> <compression type> might be something like "gzip", "bzip2", "compress" ... 
> After a "LIST FEATURES" (this was the proposed EHLO-like command to list
> NNTP extensions, right?), the server replies with "ZLIST gzip bzip2 freeze"
> (listing all the supported compression types).
> Any comments regarding this idea? I think customers reading news via
> connections without compression on IP- or lower levels would really benefit
> from this. Of course client support is needed for this, but if major NNTP
> server software packages like INN and Diablo provide compressed lists, the
> possibility that clients would pick up this (optional) feature might be
> there.
> Concerning the implementation, various libraries (zlib, ...) provide all the
> functions needed for the actual compressing. The presence of the libraries
> could be detected by autoconf, whether they are used and with which
> parameters (compression level) could be controlled by inn.conf settings.

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