This is mod_ftp, a module for special handling of ftp archive subtree in the
Apache daemon. Documentation is not written yet, but will be soon. Check
http://sunsite.mff.cuni.cz/web/local/ from time to time.
To get it working:
You need
a) get a fresh copy of Apache sources
b) edit src/Configuration to suit your needs+add a line
Module ftp_module mod_ftp.o
c) copy from this package src/mod_ftp.c to Apache's src/
d) Configure, make
e) Insert the enclosed conf/srm.conf-ftp into your conf/srm.conf end edit
   it to suit your needs (there are some comments for each directive),
   especially take care to set the second argument in FTPAlias /ftp/ ...
   correctly to your ftp subtree (sometimes it is /archive/, I use /ftp/,
   sometimes it is something else). Of course, you can change the first
   parameter (/ftp/) as well. This is the URI prefix in which the archive
   will be virtually shown
f) if you have not changed the directives much, especially is you use
   the /wwwftp/ alias, copy enclosed wwwftp/ directory to the place
   specified as the second argument in the Alias /wwwftp/ .....
   and edit Prolog.html, Epilog.html and Search.html to suit your needs.
Run httpd
Getting http://yourserver/ftp/ now should get the root directory of the ftp
tree or index file, if there is any and you haven't disabled it.
http://yourserver/ftp/?F should get the root directory of the ftp tree
in any case.
htp://yourserver/ftp/somefile should get somefile, etc., including
conversions, e.g. http://yourserver/ftp/somefile.gz, or you can see all the
possible conversions for the file http://yourserver/ftp/somefile?C (this can
be done easily by clicking on the rightmost icon in the directory listing of
the file. There are some other thing users will find out easily by following
particular hyperlinks in the directory listing. Java enabled version for
Java enabled browsers is currently being written and will be available soon
(it will transfer less data accross the network and have additional
features).

Send all your comments to jj@sunsite.mff.cuni.cz

