I am trying to replace some nodes value in XML using the XML:LibXML file parser from user input.

Example XML

<header>
   <id x_id="1">
      <a></a>
      <b></b>
      <c>NA</c>
   </id>
</header>

[download]

Code:

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

print "Please specify node c content\n";
my $node_c = <STDIN>;
chomp $node_c;

my $template = "xx.xml";
my $parser = XML::LibXML->new();
my $doc = $parser->parse_file($template);
my($object0) = $doc->findnodes("/header/id/c/text()");
my $text0 = XML::LibXML::Text->new($node_c);
$object0->replaceNode($text0);

[download]

Currently my code is working, but it somehow removed and from the xml when I tried to replace Node b content if both nodes are empty. If there is some value in node a or b, it works fine.

In reply to XML replacenode by michael99

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.