Re: XML::LibXML hangs on document w/ DTD

Michael Ludwig <[email protected]> Tue, 15 Nov 2011 20:08:35 +0100
Newsgroups	gmane.comp.lang.perl.xml
Message-ID	<20111115190835.GA4556@Dago>
Vaclav Barta schrieb am 15.11.2011 um 19:33 (+0100):
> Hi,
> 
> in response to a user bug report, I tried testing my module
> (XML::DifferenceMarkup) again and found that its testsuite hangs on my
> machine :-( - which isn't necessarily anybody else's problem, :-) but
> I've isolated it to a test case that isn't using XML::DifferenceMarkup
> at all:

Well done! It hangs on everybody's machine, that's the W3C's way of
telling people not to download the DTD from their servers but use a
local copy instead.

> my $b = $parser->load_xml(string => <<'BDOC');
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
>    "http://www.w3.org/TR/html4/loose.dtd">
> <html>
> </html>
> BDOC

Try load_html, works for me (but see below):

use strict;
use warnings;
use XML::LibXML;

print "$_\n" for
 $XML::LibXML::VERSION,
  XML::LibXML::LIBXML_DOTTED_VERSION,
  XML::LibXML::LIBXML_VERSION,
  XML::LibXML::LIBXML_RUNTIME_VERSION;

my %opt = (
#       load_ext_dtd => 0,
#       validation => 0,
#       no_network => 1,
#       recover => 1,
);

my $parser = XML::LibXML->new( %opt );

my $b = $parser->load_html(string => <<'BDOC'); # load_xml/load_html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
<html></html>
BDOC
print "parsed b\n";

> prints "parsed a" but hangs when parsing b... It could still be a
> problem with my local configuration (although AFAIK I didn't do
> anything special to resolve DTDs)

The doc for XML::LibXML::Parser says it'll do so by default.
Check the load_ext_dtd option.

http://search.cpan.org/dist/XML-LibXML/

The fact that load_xml does not seem to honour the load_ext_dtd option
looks like a bug me. But I might be wrong.

> but xmllint handles the "b" doc fine - adds xml declaration but
> doesn't complain about anything and ends normally. libxml2 is 2.7.8,
> XML::LibXML 1.70 (I also tried 1.88, with the same result) on gentoo.

My versions are:

1.70
2.7.7
20707
20708

-- 
Michael Ludwig
_______________________________________________
Perl-XML mailing list
[email protected]
To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs