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| 1 |  |  |  |  |  |  | package WWW::Search::Scrape::Yahoo; | 
| 2 |  |  |  |  |  |  |  | 
| 3 | 2 |  |  | 2 |  | 10 | use warnings; | 
|  | 2 |  |  |  |  | 4 |  | 
|  | 2 |  |  |  |  | 60 |  | 
| 4 | 2 |  |  | 2 |  | 9 | use strict; | 
|  | 2 |  |  |  |  | 4 |  | 
|  | 2 |  |  |  |  | 53 |  | 
| 5 |  |  |  |  |  |  |  | 
| 6 | 2 |  |  | 2 |  | 9 | use Carp; | 
|  | 2 |  |  |  |  | 4 |  | 
|  | 2 |  |  |  |  | 118 |  | 
| 7 | 2 |  |  | 2 |  | 12 | use WWW::Mechanize; | 
|  | 2 |  |  |  |  | 3 |  | 
|  | 2 |  |  |  |  | 49 |  | 
| 8 | 2 |  |  | 2 |  | 11 | use HTML::TreeBuilder; | 
|  | 2 |  |  |  |  | 3 |  | 
|  | 2 |  |  |  |  | 12 |  | 
| 9 | 2 |  |  | 2 |  | 45 | use URI::Escape; | 
|  | 2 |  |  |  |  | 5 |  | 
|  | 2 |  |  |  |  | 975 |  | 
| 10 |  |  |  |  |  |  |  | 
| 11 |  |  |  |  |  |  | =head1 NAME | 
| 12 |  |  |  |  |  |  |  | 
| 13 |  |  |  |  |  |  | WWW::Search::Scrape::Yahoo - Yahoo search engine | 
| 14 |  |  |  |  |  |  |  | 
| 15 |  |  |  |  |  |  | =head1 VERSION | 
| 16 |  |  |  |  |  |  |  | 
| 17 |  |  |  |  |  |  | Version 0.08 | 
| 18 |  |  |  |  |  |  |  | 
| 19 |  |  |  |  |  |  | =cut | 
| 20 |  |  |  |  |  |  |  | 
| 21 |  |  |  |  |  |  | our $VERSION = '0.08'; | 
| 22 |  |  |  |  |  |  |  | 
| 23 |  |  |  |  |  |  | =head1 SYNOPSIS | 
| 24 |  |  |  |  |  |  |  | 
| 25 |  |  |  |  |  |  | You are not expected to use this module directly. Please use WWW::Search::Scrape instead. | 
| 26 |  |  |  |  |  |  |  | 
| 27 |  |  |  |  |  |  | =cut | 
| 28 |  |  |  |  |  |  |  | 
| 29 |  |  |  |  |  |  | =head1 FUNCTIONS | 
| 30 |  |  |  |  |  |  |  | 
| 31 |  |  |  |  |  |  | =head2 search | 
| 32 |  |  |  |  |  |  |  | 
| 33 |  |  |  |  |  |  | search is the most important function in this module. | 
| 34 |  |  |  |  |  |  |  | 
| 35 |  |  |  |  |  |  | Inputs | 
| 36 |  |  |  |  |  |  |  | 
| 37 |  |  |  |  |  |  | +---------------------------+ | 
| 38 |  |  |  |  |  |  | |        keyword            | | 
| 39 |  |  |  |  |  |  | +---------------------------+ | 
| 40 |  |  |  |  |  |  | | desired number of results | | 
| 41 |  |  |  |  |  |  | +---------------------------+ | 
| 42 |  |  |  |  |  |  |  | 
| 43 |  |  |  |  |  |  | =cut | 
| 44 |  |  |  |  |  |  |  | 
| 45 |  |  |  |  |  |  |  | 
| 46 |  |  |  |  |  |  | sub search($$;$) | 
| 47 |  |  |  |  |  |  | { | 
| 48 | 0 |  |  | 0 | 1 |  | my ($keyword, $results_num, $content) = @_; | 
| 49 |  |  |  |  |  |  | ### search Yahoo using | 
| 50 |  |  |  |  |  |  | ###   keyword: $keyword | 
| 51 |  |  |  |  |  |  | ###   results number: $results_num | 
| 52 |  |  |  |  |  |  | ###   content: $content | 
| 53 |  |  |  |  |  |  |  | 
| 54 | 0 |  |  |  |  |  | my $num = 0; | 
| 55 |  |  |  |  |  |  |  | 
| 56 | 0 | 0 |  |  |  |  | if ($results_num > 100) { | 
| 57 | 0 |  |  |  |  |  | carp 'WWW::Search::Scrape::Yahoo can not process results more than 100.'; | 
| 58 | 0 |  |  |  |  |  | return undef; | 
| 59 |  |  |  |  |  |  | } | 
| 60 |  |  |  |  |  |  |  | 
| 61 | 0 |  |  |  |  |  | my @res; | 
| 62 |  |  |  |  |  |  |  | 
| 63 | 0 | 0 |  |  |  |  | unless ($content) | 
| 64 |  |  |  |  |  |  | { | 
| 65 |  |  |  |  |  |  | #yahoo is funny about search result count. Valid values are: 10,15,20,30,40,100 | 
| 66 |  |  |  |  |  |  | # set up the value to provide at least the number required | 
| 67 | 0 |  |  |  |  |  | my $yahoo_result_num; | 
| 68 | 0 | 0 |  |  |  |  | if ($results_num < 10) { | 
|  |  | 0 |  |  |  |  |  | 
|  |  | 0 |  |  |  |  |  | 
|  |  | 0 |  |  |  |  |  | 
|  |  | 0 |  |  |  |  |  | 
|  |  | 0 |  |  |  |  |  | 
| 69 | 0 |  |  |  |  |  | $yahoo_result_num = 10; | 
| 70 |  |  |  |  |  |  | } elsif ($results_num < 15) { | 
| 71 | 0 |  |  |  |  |  | $yahoo_result_num = 15; | 
| 72 |  |  |  |  |  |  | } elsif ($results_num < 20) { | 
| 73 | 0 |  |  |  |  |  | $yahoo_result_num = 20; | 
| 74 |  |  |  |  |  |  | } elsif ($results_num < 30) { | 
| 75 | 0 |  |  |  |  |  | $yahoo_result_num = 30; | 
| 76 |  |  |  |  |  |  | } elsif ($results_num < 40) { | 
| 77 | 0 |  |  |  |  |  | $yahoo_result_num = 40; | 
| 78 |  |  |  |  |  |  | } elsif ($results_num < 100) { | 
| 79 | 0 |  |  |  |  |  | $yahoo_result_num = 100; | 
| 80 |  |  |  |  |  |  | } | 
| 81 |  |  |  |  |  |  |  | 
| 82 | 0 |  |  |  |  |  | my $mech = WWW::Mechanize->new(cookie_jar => {}); | 
| 83 | 0 |  |  |  |  |  | $mech->agent_alias('Windows Mozilla'); | 
| 84 | 0 |  |  |  |  |  | $mech->get('http://search.yahoo.com/'); | 
| 85 |  |  |  |  |  |  | #$mech->dump_forms; | 
| 86 | 0 |  |  |  |  |  | $mech->submit_form( | 
| 87 |  |  |  |  |  |  | form_number => 1, | 
| 88 |  |  |  |  |  |  | fields => { | 
| 89 |  |  |  |  |  |  | p => $keyword, | 
| 90 |  |  |  |  |  |  | 'sb-top' => 'fr2', | 
| 91 |  |  |  |  |  |  | ei => 'UTF-8', | 
| 92 |  |  |  |  |  |  | n => $yahoo_result_num, | 
| 93 |  |  |  |  |  |  | }); | 
| 94 | 0 | 0 |  |  |  |  | if ($mech->success) { | 
| 95 | 0 |  |  |  |  |  | $content = $mech->response->decoded_content; | 
| 96 |  |  |  |  |  |  | } | 
| 97 |  |  |  |  |  |  | } | 
| 98 |  |  |  |  |  |  |  | 
| 99 | 0 |  |  |  |  |  | my $tree = HTML::TreeBuilder->new; | 
| 100 | 0 |  |  |  |  |  | $tree->parse($content); | 
| 101 | 0 |  |  |  |  |  | $tree->eof; | 
| 102 |  |  |  |  |  |  |  | 
| 103 |  |  |  |  |  |  | # yahoo does not show the total result count | 
| 104 |  |  |  |  |  |  |  | 
| 105 | 0 |  |  |  |  |  | my @x = $tree->look_down('_tag', 'h3'); | 
| 106 |  |  |  |  |  |  |  | 
| 107 | 0 |  |  |  |  |  | foreach (@x) { | 
| 108 | 0 |  |  |  |  |  | my ($link) = $_->look_down('_tag', 'a'); | 
| 109 | 0 | 0 |  |  |  |  | if ($link) { | 
| 110 | 0 |  |  |  |  |  | my $obfuscatedHref = $link->attr('href'); | 
| 111 | 0 | 0 |  |  |  |  | if ($obfuscatedHref =~ /.*\*\*(.*)/) { | 
| 112 | 0 |  |  |  |  |  | push @res, uri_unescape($1); | 
| 113 |  |  |  |  |  |  |  | 
| 114 |  |  |  |  |  |  | #if we have reached the max size we originally asked for, leave now | 
| 115 | 0 | 0 |  |  |  |  | last if (scalar(@res) >= $results_num); | 
| 116 |  |  |  |  |  |  |  | 
| 117 |  |  |  |  |  |  | } | 
| 118 |  |  |  |  |  |  | } | 
| 119 |  |  |  |  |  |  | } | 
| 120 |  |  |  |  |  |  |  | 
| 121 | 0 |  |  |  |  |  | return {num => $num, results => \@res}; | 
| 122 |  |  |  |  |  |  | } |