HTML::Tree(3pm) User Contributed Perl Documentation HTML::Tree(3pm)
NAME
HTML::Tree - build and scan parse-trees of HTML
VERSION
This document describes version 5.07 of HTML::Tree, released August 31,
2017 as part of HTML-Tree.
SYNOPSIS
use HTML::TreeBuilder;
my $tree = HTML::TreeBuilder->new();
$tree->parse_file($filename);
# Then do something with the tree, using HTML::Element
# methods -- for example:
$tree->dump
# Finally:
$tree->delete;
DESCRIPTION
HTML-Tree is a suite of Perl modules for making parse trees out of HTML
source. It consists of mainly two modules, whose documentation you
should refer to: HTML::TreeBuilder and HTML::Element.
HTML::TreeBuilder is the module that builds the parse trees. (It uses
HTML::Parser to do the work of breaking the HTML up into tokens.)
The tree that TreeBuilder builds for you is made up of objects of the
class HTML::Element.
If you find that you do not properly understand the documentation for
HTML::TreeBuilder and HTML::Element, it may be because you are
unfamiliar with tree-shaped data structures, or with object-oriented
modules in general. Sean Burke has written some articles for The Perl
Journal ("www.tpj.com") that seek to provide that background. The full
text of those articles is contained in this distribution, as:
HTML::Tree::AboutObjects
"User's View of Object-Oriented Modules" from TPJ17.
HTML::Tree::AboutTrees
"Trees" from TPJ18
HTML::Tree::Scanning
"Scanning HTML" from TPJ19
Readers already familiar with object-oriented modules and tree-shaped
data structures should read just the last article. Readers without that
background should read the first, then the second, and then the third.
METHODS
All these methods simply redirect to the corresponding method in
HTML::TreeBuilder. It's more efficient to use HTML::TreeBuilder
directly, and skip loading HTML::Tree at all.
new
Redirects to "new" in HTML::TreeBuilder.
new_from_file
Redirects to "new_from_file" in HTML::TreeBuilder.
new_from_content
Redirects to "new_from_content" in HTML::TreeBuilder.
new_from_url
Redirects to "new_from_url" in HTML::TreeBuilder.
SUPPORT
You can find documentation for this module with the perldoc command.
perldoc HTML::Tree
You can also look for information at:
• AnnoCPAN: Annotated CPAN documentation
<http://annocpan.org/dist/HTML-Tree>
• CPAN Ratings
<http://cpanratings.perl.org/d/HTML-Tree>
• RT: CPAN's request tracker
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=HTML-Tree>
• Search CPAN
<http://search.cpan.org/dist/HTML-Tree>
• Stack Overflow
<http://stackoverflow.com/questions/tagged/html-tree>
If you have a question about how to use HTML-Tree, Stack Overflow is
the place to ask it. Make sure you tag it both "perl" and
"html-tree".
SEE ALSO
HTML::TreeBuilder, HTML::Element, HTML::Tagset, HTML::Parser,
HTML::DOMbo
The book Perl & LWP by Sean M. Burke published by O'Reilly and
Associates, 2002. ISBN: 0-596-00178-9
It has several chapters to do with HTML processing in general, and HTML-
Tree specifically. There's more info at:
http://www.oreilly.com/catalog/perllwp/
http://www.amazon.com/exec/obidos/ASIN/0596001789
SOURCE REPOSITORY
HTML-Tree is now maintained using Git. The main public repository is
<https://github.com/kentfredric/HTML-Tree>.
The best way to send a patch is to make a pull request there.
ACKNOWLEDGEMENTS
Thanks to Gisle Aas, Sean Burke and Andy Lester for their original work.
Thanks to Chicago Perl Mongers (http://chicago.pm.org) for their patches
submitted to HTML::Tree as part of the Phalanx project
(http://qa.perl.org/phalanx).
Thanks to the following people for additional patches and documentation:
Terrence Brannon, Gordon Lack, Chris Madsen and Ricardo Signes.
AUTHOR
Current maintainers:
• Christopher J. Madsen "<perl AT cjmweb.net>"
• Jeff Fearn "<jfearn AT cpan.org>"
Original HTML-Tree author:
• Gisle Aas
Former maintainers:
• Sean M. Burke
• Andy Lester
• Pete Krawczyk "<petek AT cpan.org>"
You can follow or contribute to HTML-Tree's development at
<https://github.com/kentfredric/HTML-Tree>.
COPYRIGHT AND LICENSE
Copyright 1995-1998 Gisle Aas, 1999-2004 Sean M. Burke, 2005 Andy
Lester, 2006 Pete Krawczyk, 2010 Jeff Fearn, 2012 Christopher J. Madsen.
(Except the articles contained in HTML::Tree::AboutObjects,
HTML::Tree::AboutTrees, and HTML::Tree::Scanning, which are all
copyright 2000 The Perl Journal.)
Except for those three TPJ articles, the whole HTML-Tree distribution,
of which this file is a part, is free software; you can redistribute it
and/or modify it under the same terms as Perl itself.
Those three TPJ articles may be distributed under the same terms as Perl
itself.
The programs in this library are distributed in the hope that they will
be useful, but without any warranty; without even the implied warranty
of merchantability or fitness for a particular purpose.
perl v5.36.0 2022-12-06 HTML::Tree(3pm)
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