XML::LibXML complains

Skeeve has asked for the wisdom of the Perl Monks concerning the following question:

Previously I had used (long, long time ago) XML::Twig for parsing XML. Or XML::Simple.

Now I read that XML::Simple shouldn't be used in new code and so I wanted to try the named alternative XML::LibXML.

But I already failed with the simplest code:

use strict;
use warnings;

use XML::LibXML;

my $doc = XML::LibXML->load_xml(
    location => shift,
    validation => 0,
);
print "Done\n";

use Data::Dumper;

print Dumper $doc;
[download]

When I leave out the DOCTYPE, it seems to parse, but as soon as I have

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
[download]

my script stops with:

http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd:1: parser error : Co
+ntent error in the external subset
HTTP/1.0 500 Server Error
[download]

I wouldn't want to remove the doctype, so I'm wondering what could be wrong here. And is there a way to make the parser NOT go out and retrieve the DTD?

s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

Comment on XML::LibXML complains Select or Download Code

Replies are listed 'Best First'.
Re: XML::LibXML complains by ikegami (Patriarch) on Jun 06, 2014 at 16:51 UTC
Better yet, the following provides a local copy of the HTML/XHTML DTDs and has XML::LibXML use them instead of trying to download them. `use XML::Catalogs::HTML -libxml;` [download] `no_network => 1` is a good option to pass to XML::LibXML.	[reply] [d/l] [select]
Re: XML::LibXML complains by Skeeve (Parson) on Jun 06, 2014 at 13:52 UTC
Found it… `my $doc = XML::LibXML->load_xml( location => shift, validation => 0, load_ext_dtd => 0, # <- That's the key );` [download] `s$$([},&%#}/&/]+}%&{});#$&&s&&$^X.($'^"%]=\&(\|?{%` `+`.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e	[reply] [d/l] [select]
Re^2: XML::LibXML complains by Anonymous Monk on Sep 05, 2017 at 10:37 UTC
Thanks so much. That indeed worked for me.	[reply]
Re: XML::LibXML complains by taint (Chaplain) on Jun 06, 2014 at 14:07 UTC
Greetings, Skeeve. I should preface this by stating I haven't used XML::LibXML. That said. Where retrieving the DTD is concerned. As I read it, from the pod, and from your example code, it's (`load_xml`) attempting to load a File Handle. So I think that's what it's choking on. In other words, it's looking for the file you want to parse/manipulate. FWIW, it's also possible (where the DTD is concerned) to modify the location `<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">` [download] could be written as `<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://path/to/my/personal/local/DTD/my-strict-xhtml.dtd">` [download] Best wishes. --Chris UPDATE: OOP's looks like the solution was found while I composed my response. :P ¡λɐp ʇɑəɹ⅁ ɐ əʌɐɥ puɐ ʻꜱdləɥ ꜱᴉɥʇ ədoH	[reply] [d/l] [select]