comment on

Hello,
I've been working on an XHTML parser, and for the most part I really like XML::Twig, it's very powerfull yet still fairly easy to use. However, there is still some weirdness that I cannot figure out how to fix.

For example, if I load in a valid XHTML document, add a field to it (such as a form tag), then output the parsed data. I would expect the output would be valid XHTML as well, but it isn't. See example:

This is my valid XHTML document:

<html>
  <head>
    <title>example</title>
  </head>
  <body>
   <text>Foo Bar</text>
  </body>
</html>
[download]

Here is my code, which will insert a form tag into the body.

#!/usr/bin/perl -w
use strict;
use XML::Twig;

sub main() {
        my $filename = $ARGV[0] ? $ARGV[0] : die "specify input filena
+me.\n";
        my @tags = ('input', 'textarea', 'checkbox');

        my $xml = XML::Twig->new(
                        keep_spaces_in => [ 'pre' ],
                        pretty_print => 'indented',
                        twig_roots => { 
                            'body' => \&insert_form_tags,
                        },
                        twig_print_outside_roots => 1,
        );

        $xml->parsefile("$filename");
        $xml->print;
}

sub insert_form_tags() {
        my ($xml, $body) = @_;
        my $form_group = 'process_group';
        my $form_name = 'process_requirements';
        my $form = $body->insert(
                form => {
                        method => "Post",
                        action => "submit.cgi", 
                },
        );
}

&main();
[download]

This is simple code to input form tags, and it works, the form tags are inserted, however the output of XML::Twig generates invalid XHTML. See output:

<html>
  <head>
    <title>example</title>
  </head>

</html>
<html>
  <body>
    <form action="submit.cgi" method="Post">
      <text>Foo Bar</text>
    </form>
  </body>
</html>
[download]

Notice the closing, and then re-opening of the html tag right after the head, and before the body. When I try to parse this outputed file with XML::Twig it gets an error right at that spot. Removing the offending lines resolves the problem.

So my question is, how do I get XML::Twig to output valid XHTML after adding this form tag?

Thanks in advance for any help!


- Nick

In reply to XML::Twig generating invalid XHTML output?? by nick

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