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HTML::TreeBuilder::XPath(3pm) User Contributed Perl Documentation HTML::TreeBuilder::XPath(3pm)
NAME
HTML::TreeBuilder::XPath - add XPath support to HTML::TreeBuilder
SYNOPSIS
use HTML::TreeBuilder::XPath;
my $tree= HTML::TreeBuilder::XPath->new;
$tree->parse_file( "mypage.html");
my $nb=$tree->findvalue( '/html/body//p[@class="section_title"]/span[@class="nb"]');
my $id=$tree->findvalue( '/html/body//p[@class="section_title"]/@id');
my $p= $html->findnodes( '//p[@id="toto"]')->[0];
my $link_texts= $p->findvalue( './a'); # the texts of all a elements in $p
$tree->delete; # to avoid memory leaks, if you parse many HTML documents
DESCRIPTION
This module adds typical XPath methods to HTML::TreeBuilder, to make it easy to query a
document.
METHODS
Extra methods added both to the tree object and to each element:
findnodes ($path)
Returns a list of nodes found by $path. In scalar context returns an
"Tree::XPathEngine::NodeSet" object.
findnodes_as_string ($path)
Returns the text values of the nodes, as one string.
findnodes_as_strings ($path)
Returns a list of the values of the result nodes.
findvalue ($path)
Returns either a "Tree::XPathEngine::Literal", a "Tree::XPathEngine::Boolean" or a
"Tree::XPathEngine::Number" object. If the path returns a NodeSet,
$nodeset->xpath_to_literal is called automatically for you (and thus a
"Tree::XPathEngine::Literal" is returned). Note that for each of the objects
stringification is overloaded, so you can just print the value found, or manipulate it in
the ways you would a normal perl value (e.g. using regular expressions).
findvalues ($path)
Returns the values of the matching nodes as a list. This is mostly the same as
findnodes_as_strings, except that the elements of the list are objects (with overloaded
stringification) instead of plain strings.
exists ($path)
Returns true if the given path exists.
matches($path)
Returns true if the element matches the path.
find ($path)
The find function takes an XPath expression (a string) and returns either a
Tree::XPathEngine::NodeSet object containing the nodes it found (or empty if no nodes
matched the path), or one of XML::XPathEngine::Literal (a string),
XML::XPathEngine::Number, or XML::XPathEngine::Boolean. It should always return something
- and you can use ->isa() to find out what it returned. If you need to check how many
nodes it found you should check $nodeset->size. See XML::XPathEngine::NodeSet.
as_XML_compact
HTML::TreeBuilder's "as_XML" output is not really nice to look at, so I added a new
method, that can be used as a simple replacement for it. It escapes only the '<', '>' and
'&' (plus '"' in attribute values), and wraps CDATA elements in CDATA sections.
Note that the XML is actually not garanteed to be valid at this point. Nothing is done
about the encoding of the string. Patches or just ideas of how it could work are welcome.
as_XML_indented
Same as as_XML, except that the output is indented.
SEE ALSO
HTML::TreeBuilder
XML::XPathEngine
REPOSITORY
<https://github.com/mirod/HTML--TreeBuilder--XPath>
AUTHOR
Michel Rodriguez, <mirod AT cpan.org>
COPYRIGHT AND LICENSE
Copyright (C) 2006-2011 by Michel Rodriguez
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself, either Perl version 5.8.4 or, at your option, any later version of
Perl 5 you may have available.
perl v5.32.0 2021-01-03 HTML::TreeBuilder::XPath(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2025-01-15 08:00 @3.142.54.169 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)