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![XML::Liberal Tatsuhiko Miyagawa [email_address] Six Apart, Ltd. / Shibuya Perl Mongers YAPC::NA 2006 Chicago](https://image.slidesharecdn.com/xmlliberal-19124/85/XML-Liberal-1-320.jpg)
![XML::Liberal Tatsuhiko Miyagawa [email_address] Six Apart, Ltd. / Shibuya Perl Mongers YAPC::NA 2006 Chicago](https://image.slidesharecdn.com/xmlliberal-19124/75/XML-Liberal-1-2048.jpg)
Uploaded byTatsuhiko Miyagawa
XML::Liberal
The document discusses XML::Liberal, a Perl module that allows XML parsers to successfully parse XML documents that contain errors. It provides examples of how XML::Liberal can be used to override an existing XML parser like XML::LibXML to make it more liberal in parsing invalid XML. It also shows how XML::Liberal can be used to try parsing XML with a fallback parser if the primary parser fails due to errors in the XML.
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XML::Liberal
- 1. XML::Liberal Tatsuhiko Miyagawa [email_address] Six Apart, Ltd. / Shibuya Perl Mongers YAPC::NA 2006 Chicago
- 2. Quiz: What's wrongwith following XMLs?
- 3. <?xml version="1.0"?> <heroes>Larry& Damian</heroes>
- 4. <?xml version="1.0"?> <heroes>Larry & Damian</heroes>
- 5. <?xml version="1.0"?> <shout>I ♥ Perl & Ruby! </shout>
- 6. <?xml version="1.0"?> <shout>I ♥ Perl & Ruby! </shout>
- 7. <?xml version="1.0"?> <html><body> <a href=foo.html>Foo foo!</a> </body> </html>
- 8. <?xml version="1.0"?> <html><body> <a href= "foo.html" >Foo foo!</a> </body> </html>
- 9. <?xml version="1.0"?> <html><body> <a href="/search?q=YAPC+NA&hl=en">Search for YAPC</a> </body> </html>
- 10. <?xml version="1.0"?> <html><body> <a href="/search?q=YAPC+NA & hl=en">Search for YAPC</a> </body> </html>
- 11. <?xml version="1.0"?> <rssversion="2.0"> <channel> <item> <title>YAPC is love</title> <content:encoded>Here I am!</content:encoded> </item> </channel> </rss>
- 12. <?xml version="1.0"?> <rssversion="2.0 xmlns:content="http://purl.org/rss/1.0/modules/content/" > <channel> <item> <title>YAPC is love</title> <content:encoded>Here I am!</content:encoded> </item> </channel> </rss>
- 13. <?xml version="1.0" encoding="utf-8"?><search> <result> <excerpt>YAPC 最高 ! ...</excerpt> </result> </search>
- 14. <?xml version="1.0" encoding="utf-8"?><search> <result> <excerpt>YAPC 最高 ! □ ...</excerpt> </result> </search>
- 15. If you're afeed publisher, Make sure your feed is valid.
- 16. If you're afeed consumer, Not being able to parse broken feeds might make your users unhappy.
- 17. As we sawin the Quiz
- 18. Detecting XML errorsIs easy and simple (sometimes).
- 19.
- 20.
- 21. Why not XMLparsers doing the same thing?
- 22. XML::Liberal Does itfor you.
- 23.
- 24. Usage #1 Ifyou use XML::LibXML
- 25. use strict; useXML::LibXML; my $parser = XML::LibXML->new; my $doc = $parser->parse_string($xml);
- 26. use strict; useXML::Liberal; my $parser = XML::Liberal->new("LibXML"); my $doc = $parser->parse_string($xml);
- 27. Note: There's NOperformance drawback If the data is valid
- 28.
- 29. Usage #2 Ifyou use XML::LibXML Without control to change the code
- 30. use strict; useXML::Liberal; XML::Liberal->globally_override('LibXML'); # later on … my $parser = XML::LibXML->new;
- 31. Usage #3 Ifyou don't use LibXML
- 32. use strict; useXML::FooParser; $doc = parse_xml($xml);
- 33. use strict; useXML::FooParser; use XML::Liberal; eval { $doc = parse_xml($xml) }; if ($@){ my $p = XML::Liberal->new('LibXML'); my $d = $p->parse_string($xml); $xml = $d->toString(1); $doc = parse_xml($xml); }
- 34. XML::Liberal Came outof Plagger http://plagger.org/
- 35.
- 36.