NAME

WWW::HTMLTagAttributeCounter - access a webpage and count number of tags or attributes

SYNOPSIS

use strict;
use warnings;

use WWW::HTMLTagAttributeCounter;

my $c = WWW::HTMLTagAttributeCounter->new;

$c->count('zoffix.com', [ qw/a span div/ ] )
    or die "Error: " . $c->error . "\n";

print "I counted $c tags on zoffix.com\n";

DESCRIPTION

The module was developed for use in an IRC bot thus you may find it useless for anything else.

The module simply accesses a given webpage and counts either HTML tags or HTML element attributes.

CONSTRUCTOR

new

my $c = WWW::HTMLTagAttributeCounter->new;

my $c = WWW::HTMLTagAttributeCounter->new(
    ua => LWP::UserAgent->new( timeout => 10 ),
);

Contructs and returns a fresh WWW::HTMLTagAttributeCounter object. Takes the following arguments in a key/value fashion:

ua

my $c = WWW::HTMLTagAttributeCounter->new(
    ua => LWP::UserAgent->new( timeout => 10 ),
);

Optional. The ua argument takes an LWP::UserAgent-like object as a value, the object must have a get() method that returns HTTP::Response object and takes a URI to fetch as the first argument. Default to:

LWP::UserAgent->new(
    timeout => 30,
    agent   => 'Opera 9.5',
);

METHODS

count

my $result = $c->count( 'http://zoffix.com/', 'div' )
    or die $c->error;

my $result = $c->count( 'http://zoffix.com/', [ qw/div span a/ ] )
    or die $c->error;

my $result = $c->count( 'http://zoffix.com/', [ qw/href class id/ ], 'attr' )
    or die $c->error;

Instructs the object to count tags or attributes. Takes two or three arguments that are as follows:

first argument

$c->count( 'http://zoffix.com/', 'div' )

$c->count( \ '<div></div><div></div>, 'div' )

Mandatory. The first argument must be either a string with URI to access or a reference to a scalar containing the actual HTML code. If the URI is passed the object will fetch the URI and the contents of will be treated as HTML code.

second argument

$c->count( 'http://zoffix.com/', 'div' )

$c->count( 'http://zoffix.com/', [ qw/div span a/ ] )

$c->count( 'http://zoffix.com/', 'href', 'attr' )

$c->count( 'http://zoffix.com/', [ qw/href id class/ ], 'attr' )

Mandatory. The second argument takes either a string or an arrayref as a value. Specifying a string is the same as specifying an arrayref with just that string in it. The argument represents what to count, i.e. this would be either tag names or attribute names.

third argument

$c->count( 'http://zoffix.com/', 'div' )

$c->count( 'http://zoffix.com/', 'div', 'tag' )

$c->count( 'http://zoffix.com/', 'href', 'attr' )

Optional. The third argument (if specified) must be either string tag or string attr. The argument specifies what to count, if it's tag then the object will count tags (specified in the second argument) if the value is attr then the object will count attributes. Defaults to: tag

return value

my $result = $c->count( 'http://zoffix.com/', [ qw/div a span/ ], )
    or die $c->error;

$VAR1 = {
    'div' => 6,
    'a' => 15,
    'span' => 8
};

In case of an error the count() method returns either undef or an empty list, depending on the context, and the description of the error will be available via error() method. On success returns a hashref where keys are either tags or attributes that you were counting and values are the actual count numbers.

result

$c->count( 'http://zoffix.com/', [ qw/div a span/ ], )
    or die $c->error;

my $result = $c->result;

Must be called after a successful call to count() method. Returns the exact same hashref last call to count() method returned.

result_readable

$c->count( 'http://zoffix.com/', [ qw/div a span/ ], )
    or die $c->error;

print "I counted $c tags on zoffix.com\n";
# or
print "I counted " . $c->result_readable . " tags on zoffix.com\n"
## prints:   I counted 15 a, 6 div and 8 span tags on zoffix.com

Must be called after a successful call to count() method. Returns count results as a string, e.g.:

15 a, 6 div and 8 span
6 div and 8 span
8 span

This method is overloaded on "", therefore you can simply use the object in a string to get the return of this method.

error

$c->count( 'http://zoffix.com/', [ qw/div a span/ ], )
    or die $c->error;

If count() method fails it will return either undef or an empty list, depending on the context, and the error will be available via error() method. Takes no arguments, returns human parsable error message explaing the failure.

ua

my $ua = $c->ua;
$ua->proxy( 'http', 'http://foo.com' );
$c->ua( $ua );

Returns currently used object that used for fetching URIs - see constructor's ua argument for details. Takes one optional argument - the new object to use for fetching.

REPOSITORY

BUGS

AUTHOR

ZOFFIX

LICENSE

You can use and distribute this module under the same terms as Perl itself. See the LICENSE file included in this distribution for complete details.