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HTML::PullParser(3) User Contributed Perl Documentation HTML::PullParser(3)
NAME
HTML::PullParser - Alternative HTML::Parser interface
SYNOPSIS
use HTML::PullParser;
$p = HTML::PullParser->new(file => "index.html",
start => 'event, tagname, @attr',
end => 'event, tagname',
ignore_elements => [qw(script style)],
) || die "Can't open: $!";
while (my $token = $p->get_token) {
#...do something with $token
}
DESCRIPTION
The HTML::PullParser is an alternative interface to the HTML::Parser class. It basically
turns the HTML::Parser inside out. You associate a file (or any IO::Handle object or
string) with the parser at construction time and then repeatedly call $parser->get_token
to obtain the tags and text found in the parsed document.
The following methods are provided:
$p = HTML::PullParser->new( file => $file, %options )
$p = HTML::PullParser->new( doc => \$doc, %options )
A "HTML::PullParser" can be made to parse from either a file or a literal document
based on whether the "file" or "doc" option is passed to the parser's constructor.
The "file" passed in can either be a file name or a file handle object. If a file
name is passed, and it can't be opened for reading, then the constructor will return
an undefined value and $! will tell you why it failed. Otherwise the argument is
taken to be some object that the "HTML::PullParser" can read() from when it needs more
data. The stream will be read() until EOF, but not closed.
A "doc" can be passed plain or as a reference to a scalar. If a reference is passed
then the value of this scalar should not be changed before all tokens have been
extracted.
Next the information to be returned for the different token types must be set up.
This is done by simply associating an argspec (as defined in HTML::Parser) with the
events you have an interest in. For instance, if you want "start" tokens to be
reported as the string 'S' followed by the tagname and the attributes you might pass
an "start"-option like this:
$p = HTML::PullParser->new(
doc => $document_to_parse,
start => '"S", tagname, @attr',
end => '"E", tagname',
);
At last other "HTML::Parser" options, like "ignore_tags", and "unbroken_text", can be
passed in. Note that you should not use the event_h options to set up parser
handlers. That would confuse the inner logic of "HTML::PullParser".
$token = $p->get_token
This method will return the next token found in the HTML document, or "undef" at the
end of the document. The token is returned as an array reference. The content of
this array match the argspec set up during "HTML::PullParser" construction.
$p->unget_token( @tokens )
If you find out you have read too many tokens you can push them back, so that they are
returned again the next time $p->get_token is called.
EXAMPLES
The 'eg/hform' script shows how we might parse the form section of HTML::Documents using
HTML::PullParser.
SEE ALSO
HTML::Parser, HTML::TokeParser
COPYRIGHT
Copyright 1998-2001 Gisle Aas.
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
perl v5.16.3 2013-03-25 HTML::PullParser(3)
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
2024-04-20 02:09 @3.142.199.138 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)