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HTML::HeadParser(3pm) |
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HTML: :HeadParser − Parse < HEAD > section of a HTML document
require HTML::HeadParser; $p = HTML::HeadParser->new; $p->parse($text) and print "not finished"; $p->header(’Title’) # to access <title>....</title> $p->header(’Content-Base’) # to access <base href="http://..."> $p->header(’Foo’) # to access <meta http-equiv="Foo" content="...">
The HTML: :HeadParser is a specialized (and lightweight) HTML: :Parser that will only parse the < HEAD >...</HEAD> section of an HTML document. The parse() method will return a FALSE value as soon as some < BODY > element or body text are found, and should not be called again after this.
The
HTML: :HeadParser keeps a reference
to a header object, and the parser will update this header
object as the various elements of the < HEAD
> section of the HTML document are
recognized. The following header fields are affected:
Content-Base:
The Content-Base header is initialized from the <base href="..."> element.
Title:
The Title header is initialized from the <title>...</title> element.
Isindex:
The Isindex header will be added if there is a <isindex> element in the <head>. The header value is initialized from the prompt attribute if it is present. If no prompt attribute is given it will have ’?’ as the value.
X-Meta-Foo:
All <meta> elements will initialize headers with the prefix ""X−Meta−"" on the name. If the <meta> element contains a "http−equiv" attribute, then it will be honored as the header name.
The
following methods (in addition to those provided by the
superclass) are available:
$hp = HTML: :HeadParser->new( [$header]
)
The object constructor. The optional $header argument should be a reference to an object that implement the header() and push_header() methods as defined by the HTTP: :Headers class. Normally it will be of some class that isa or delegates to the HTTP: :Headers class.
If no $header is given HTML: :HeadParser will create an HTTP: :Header object by itself (initially empty).
$hp->header;
Returns a reference to the header object.
$hp->header( $key )
Returns a header value. It is just a shorter way to write "$hp−>header−>header($key)".
$h = HTTP::Headers->new; $p = HTML::HeadParser->new($h); $p->parse(<<EOT); <title>Stupid example</title> <base href="http://www.linpro.no/lwp/"> Normal text starts here. EOT undef $p; print $h->title; # should print "Stupid example"
the HTML::Parser manpage, the HTTP::Headers manpage
The HTTP: :Headers class is distributed as part of the libwww-perl package.
Copyright 1996−2001 Gisle Aas. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
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HTML::HeadParser(3pm) | |