Koha/misc/cronjobs/rss/README
Galen Charlton f74d63a1e5 bug 2864 [2/2]: move rss/* to misc/cronjobs/rss/*
As rss.pl is not a CGI script, moved it to join the
other cronjobs.  Full documentation of the script
is in misc/cronjobs/rss/rss.pl, but to summarize:

[1] rss.pl is run on the command line to produce
    an RSS XML document.  The output should be
    placed in a directory accessible to the OPAC
    (or staff) web interface so that users can download
    the RSS feed.  An example of usage:

    misc/cronjobs/rss.pl lastAcquired.conf

    Normally rss.pl should be run periodically (e.g., daily)
    to keep the feed up-to-date.

[2] The configuration file (e.g., lastAcquired.conf) lists

    * name of the template file to use
    * path of output file
    * SQL query

    rss.pl runs the SQL query, then feeds the output of the
    query through the template to produce the output file.

[3] The template file (e.g., lastAcquired.tmpl) uses
    HTML::Template syntax like any of the HTML
    templates for the web interface.

Signed-off-by: Galen Charlton <galen.charlton@liblime.com>
2008-12-17 08:02:34 -06:00

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About:
rss.pl is meant to provide an extensible tool for creating RSS 0.91
formatted files suitable for syndication. The script relies on two
external files for configuration information. Rather than trying to
explain how this occurs, I'll show you using the provided lastAcquired
files. There are currently three rss feeds bundled in this tarball
(lastAcquired, longestUnseen, and mostReserved), the config files for
each of these should be modified to suit your local site. A smallish
Koha image (sm-koha-icon.jpg) is included as well.
Dependencies:
rss.pl depends on an installed Koha system, and uses the C4::Context
module it provides.
Details:
rss.pl is meant to be run from cron (probably once a day or so -- more
often at larger libraries depending on the report being generated). It
is invoked like this (in the case of lastAcquired):
rss.pl /path/to/rssKoha/lastAcquired.conf
The basic process is that rss reads the config file
(lastAcquired.conf) to determine RSS header information, the SQL query
used to generate the results, and the HTML::Template style used to
format the output. Since you'll likely to want to create your own RSS
content, or at least modify the ones present here, let's review the
config file and the template file.
A config file is divided into three sections; channel, image, and
config. A section begins with the name of the section occuring alone
on a line, and ends with the beginning of the next section (or the end
of the file). Each of these sections contains series of configuration
options in the form:
name=content
The content section can contain spaces, but not newlines, special
characters, or html mark-up. It's also important that there are no
blank lines within the config file.
Here's the lastAquired.conf by way of example:
channel
title=Recent Koha Acquisitions
link=http://www.koha.org
desc=The 15 most recent acquisitions
lang=en
lastBuild=Fri, 09 May 2003 08:00:00
image
title=Koha, the worlds best Open Source Library System
url=http://www.koha.org/images/foo.jpg
link=http://www.koha.org
config
tmpl=lastAcquired.tmpl
output=lastAcquired.xml
query=select biblioitems.isbn as isbn, biblio.title as title, biblio.author as author from biblio, biblioitems, items where biblioitems.biblionumber = items.biblionumber and biblio.biblionumber = items.biblionumber and items.dateaccessioned is not NULL order by items.dateaccessioned desc
This data (and the data acquired from the query) are then used to fill
in the template. Most of the template is boilerplate and should not
be edited. The section within the <TMPL_LOOP NAME=ITEMS>
... </TMPL_LOOP> is the part which can be modified to create your own
RSS content.
Here's the lastAcquired.tmpl file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE rss PUBLIC "-//Netscape Communications/DTD RSS 0.91/EN"
"http://my.netscape.com/publish/formats/rss-0.91.dtd">
<rss version="0.91">
<channel>
<title><TMPL_VAR CHANNELTITLE></title>
<link><TMPL_VAR CHANNELLINK></link>
<description><TMPL_VAR CHANNELDESC></description>
<language><TMPL_VAR CHANNELLANG></language>
<lastBuildDate><TMPL_VAR CHANNELLASTBUILD></lastBuildDate>
<image>
<title><TMPL_VAR IMAGETITLE></title>
<url><TMPL_VAR IMAGEURL></url>
<link><TMPL_VAR IMAGELINK></link>
</image>
<TMPL_LOOP NAME=ITEMS>
<item>
<title><TMPL_VAR TITLE>, by <TMPL_VAR AUTHOR></title>
<link>http://opac.library.org.nz/cgi-bin/koha/opac-searchresults.pl?isbn=<TMPL_VAR ISBN></link>
</item>
</TMPL_LOOP>
</channel>
</rss>
Credits:
Originally written by Pat Eyler (pate@eylerfamily.org), suggestions,
advice, and help came from 'Content Syndication with RSS', Chris
Cormack, Mike Hansen, Steve Tonnesen and a variety of folks on #koha at
irc.katipo.co.nz.