Replace the Text of an XML Element Using LibXML and DOM

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

Hello,

Warning XML and Perl newbie. I've created a DOM tree from XML::LibXML::SAX::Builder and the structure is roughly as follows:

<Message>
  <Body>...Base64_Encoded_Text...</Body>
</Message>
[download]

I need to replace the Base64 encode text with its decoded value. So far I've been able to decode the contents of the Body with the following:

.
.
.
my $dom = $generator->execute("exec $opt_hash{sp} \'$opt_dates{start}\
+', \'$opt_dates{end}\'");
my $root = $dom->getDocumentElement;
my @bodies = $root->getElementsByTagName('Body');

for (my $i = 0; $i < scalar(@bodies); $i++) {
    print decode_base64($bodies[$i]->getFirstChild->getData); 
}
.
.
.
[download]

However, I'd like to modify the tree directly and not just the list that gets returned from getElementsByName. Can anyone help?

Thanks,
Jay

Comment on Replace the Text of an XML Element Using LibXML and DOM Select or Download Code

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Re: Replace the Text of an XML Element Using LibXML and DOM by lestrrat (Deacon) on Jul 01, 2002 at 23:09 UTC
How about: `foreach my $node ( $dom->findnodes( '/Message/Body' ) ) { my $decoded = decode_base64($node->textContent()); $node->removeChild( $node->firstChild() ); $node->appendTextNode( $decoded ); }` [download]	[reply] [d/l]
Re: Re: Replace the Text of an XML Element Using LibXML and DOM by jmurphy (Acolyte) on Jul 02, 2002 at 18:40 UTC
Thanks so much for the reply, Hopefully this can help someone else. I ended up implementing as follows: `my $root = $dom->getDocumentElement; my $bodies = $root->getElementsByTagName( "MessageBody" ); foreach my $body ( $bodies->get_nodelist() ) { my $encoded_node = $body->firstChild(); $encoded_node->replaceDataString( $encoded_node->data(), decode_ba +se64( $encoded_node->data() )); }` [download] Again thanks. You got me going on the right path. Take care, Jay	[reply] [d/l]
Re: Re: Re: Replace the Text of an XML Element Using LibXML and DOM by lestrrat (Deacon) on Jul 02, 2002 at 20:28 UTC
I learned something new, too :) ( didn't know about replaceDataString() )	[reply]


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