XML::RSS::LibXML - XML::RSS with XML::LibXML (parse-only)
use XML::RSS::LibXML; my $rss = XML::RSS::LibXML->new; $rss->parsefile($file); print "channel: $rss->{channel}->{title}\n"; foreach my $item (@{ $rss->{items} }) { print " item: $item->{title} ($item->{link})\n"; } # Add custom modules $rss->add_module(uri => $uri, prefix => $prefix);
XML::RSS::LibXML uses XML::LibXML (libxml2) for parsing RSS instead of XML::RSS' XML::Parser (expat), while trying to keep interface compatibility with XML::RSS.
XML::RSS is an extremely handy tool, but it is unfortunately not exactly the most lean or efficient RSS parser, especially in a long-running process. So for a long time I had been using my own version of RSS parser to get the maximum speed and efficiency - this is the re-packaged version of that module, such that it adheres to the XML::RSS interface.
Use this module when you have severe performance requirements in parsing RSS files.
There seems to be a bit of confusion as to how compatible XML::RSS::LibXML is with XML::RSS: XML::RSS::LibXML is NOT 100% compatible with XML::RSS. For example, XML::RSS::LibXML is not capable of outputting RSS in various formats. It also doesn't do complete parsing of the XML document because of the way we deal with XPath and libxml's DOM (see CAVEATS below)
On top of that, I originally wrote XML::RSS::LibXML as sort of a fast replacement for XML::RAI, which looked cool in terms of abstracting the various modules. And therefore versions prior to 0.02 worked more like XML::RAI rather than XML::RSS. That was a mistake in hind sight, so it has been addressed.
From now on XML::RSS::LibXML will try to match XML::RSS's functionality as much as possible in terms of parsing RSS feeds. Please send in patches and any tests that may be useful!
Creates a new instance of XML::RSS::LibXML
Parse a string containing RSS.
Parse an RSS file specified by $filename
Return the string representation of the parsed RSS.
Adds a new module. You should do this before parsing the RSS. XML::RSS::LibXML understands a few modules by default:
rdf => "http://www.w3.org/1999/02/22-rdf-syntax-ns#", dc => "http://purl.org/dc/elements/1.1/", sy => "http://purl.org/rss/1.0/modules/syndication/", admin => "http://webns.net/mvcb/", content => "http://purl.org/rss/1.0/modules/content/", cc => "http://web.resource.org/cc/", taxo => "http://purl.org/rss/1.0/modules/taxonomy/",
So you do not need to add these explicitly.
Here's a simple benchmark using benchmark.pl in this distribution:
daisuke@localhost XML-RSS-LibXML$ perl -Mlib=lib benchmark.pl index.rdf Rate rss rss_libxml rss 8.00/s -- -97% rss_libxml 262/s 3172% --
No support whatsover for writing RSS. No plans to support it either.
Only first level data under <channel> and <item> tags are examined. So if you have complex data, this module will not pick it up. For most of the cases, this will suffice, though.
Tests. Currently tests are simply stolen from XML::RSS. It would be nice to have tests that do more extensive testing for correctness
XML::RSS, XML::LibXML, XML::LibXML::XPathContext
Copyright 2005 Daisuke Maki <dmaki@cpan.org>, Tatsuhiko Miyagawa <miyagawa@bulknews.net>. All rights reserved.
Development partially funded by Brazil, Ltd. <http://b.razil.jp>
To install XML::RSS::LibXML, copy and paste the appropriate command in to your terminal.
cpanm
cpanm XML::RSS::LibXML
CPAN shell
perl -MCPAN -e shell install XML::RSS::LibXML
For more information on module installation, please visit the detailed CPAN module installation guide.