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.
