NAME

       Scrappy::Scraper::Parser - Scrappy Scraper Data Extrator

VERSION

       version 0.94112090

SYNOPSIS

           #!/usr/bin/perl
           use Scrappy::Scraper::Parser;

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->html($html);

               # get all links in all table rows with CSS selector
               my  $links = $parser->scrape('table tr a');

               # select all links in the 2nd table row of all tables with XPATH selector
               my  $links = $parser->scrape('//table/tr[2]/a');

               # percision scraping !
               # select all links in the 2nd table row ONLY with CSS selectors and focus()
               my  $links =
                   $parser->select('table tr')
                      ->focus(2)
                      ->scrape('a');

DESCRIPTION

       Scrappy::Scraper::Parser provides various tools for scraping/extracting information from
       web pages using the Scrappy framework.

   ATTRIBUTES
       The following is a list of object attributes available with every Scrappy::Scraper::Parser
       instance.

       data

       The data attribute gets/sets the extracted data which is returned from the scrape method.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select('table tr');
               $parser->data;

       html

       The html attribute gets/sets the HTML content to be parsed and extracted from.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->html($HTML);

       html_tags

       The html_tags attribute gets a hashref of all known HTML tags and attributes to be used
       with Web::Scraper.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->html_tags;

       worker

       The worker attribute holds the Web::Scraper object which is used to parse HTML and extract
       data.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->worker;

METHODS

   filter
       The filter method allows you to filter the tags returned within the results by supplying
       the filter method with a list of tag attributes that you specifically want to return,
       forsaking all others, including the special text and html tags/keys.

           # filter results and only return meta tags with a content attribute
           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select('meta');
               print $parser->data;

               ...

               {
                   name => '...',
                   text => '...',
                   html => '...',
                   content => '....',
                   http => '...',
                   ....
               }

               print $parser->filter('name', 'content')->data;

               ...

               {
                   name => '...',
                   content => '....',
               }

   focus
       The focus method is used zero-in on specific blocks of HTML so the selectors only extract
       data from within the highlighted block. The focus method is meant to be used after the
       select method extracts rows of data, the focus method is passed an array index which
       zeros-in on that row of data.

           my  $parser = Scrappy::Scraper::Parser->new;

           # percision scraping !
           # select all links in the 2nd table row ONLY
           my  $links =
               $parser->select('table tr')
                  ->focus(2)
                  ->scrape('a');

   scrape
       The scrape method is used to extract data from the specified HTML and return the extracted
       data. This method is dentical to the select method with the exception of what is returned.

           my  $parser = Scrappy::Scraper::Parser->new;
           my  $links = $parser->scrape('a', $from_html); #get all links

   select
       The select method is used to extract data from the specified HTML and return the parser
       object. The data method can be used to access the extracted information.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select('a', $from_html); #get all links

           my  $links = $parser->data;

   first
       The first method is used to return the first element from the extracted dataset.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select('a', $from_html); #get all links

           my  $first_link = $parser->first;

           # equivalent to ...
           my  $first_link = $parser->data->[0];

   last
       The last method is used to return the last element from the extracted dataset.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select('a', $from_html); #get all links

           my  $last_link = $parser->last;

           # equivalent to ...
           my  $last_link = $parser->data->[(@{$parser->data}-1)];

   select_first
       The select_first method is a convenience feature combining the select() and first()
       methods to return the first element from the extracted data.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select_first('a'); #get link text
               $parser->select_first('a', 'href'); #get link URL

   select_last
       The select_last method is a convenience feature combining the select() and last() methods
       to return the last element from the extracted data.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select_last('a'); #get link text
               $parser->select_last('a', 'href'); #get link URL

   each
       The each method is used loop through the extracted dataset. The each method takes one
       argument, a code reference, and is passed the each extracted item.

           my  $parser = Scrappy::Scraper::Parser->new;
               $parser->select('a', $from_html); #get all links

               $parser->each(sub{
                   print shift->{href} . "\n"
               });

   has_html
       The has_html method return a boolean which determine whether HTML content has been set.

           my  $parser = Scrappy::Scraper::Parser->new;
               print 'oh no' unless $parser->has_html;

AUTHOR

       Al Newkirk <awncorp@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2010 by awncorp.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.