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package WWW::Amazon::BestSeller; |
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20004
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use 5.006; |
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use strict; |
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use warnings; |
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671
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use LWP::UserAgent; |
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37095
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804
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use HTML::TreeBuilder; |
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25335
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use WWW::UserAgent::Random; |
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use Exporter; # 'import'; |
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use vars qw/@EXPORT @EXPORT_OK @ISA $DEBUG $ua/; |
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@ISA = qw/Exporter/; |
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@EXPORT = qw/get_top_category get_sub_category/; # symbols to export on request |
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@EXPORT_OK = @EXPORT; # symbols to export on request |
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=head1 NAME |
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WWW::Amazon::BestSeller - The great new WWW::Amazon::BestSeller! |
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=head1 VERSION |
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Version 0.01 |
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=cut |
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our $VERSION = '0.01'; |
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=head1 SYNOPSIS |
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抓取 Amazon Best Seller 类别列表, 默认是 com 站, |
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可以通过指定完整的url去获得其它网站的 Best Seller |
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use WWW::Amazon::BestSeller; |
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my $top_categorys = get_top_category(); |
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my $top_sub_categorys = get_sub_category( $up_level_url ); |
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=head1 EXPORT |
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默认导出 get_top_category 和 get_sub_category 函数 |
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=head1 SUBROUTINES/METHODS |
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=head2 get_top_category |
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如果不指定 url, 则默认去取 US 的 Top Selles |
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=cut |
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sub get_top_category { |
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my $top_url = shift; |
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$top_url ||= 'http://www.amazon.com/Best-Sellers/zgbs/ref=zg_bs_unv_la_0_la_1'; |
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return _get_with_retry( $top_url ); |
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} |
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=head2 get_sub_category |
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获得指定 url 类别的子类别 |
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=cut |
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66
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sub get_sub_category { |
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my $sub_url = shift; |
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0
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return [] unless $sub_url; |
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return _get_with_retry( $sub_url ); |
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} |
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sub _get_ua { |
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return $ua if $ua; |
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$ua = LWP::UserAgent->new( agent => rand_ua("") ); |
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return $ua; |
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} |
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sub _get_with_retry { |
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my ( $url, $retry ) = @_; |
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$retry ||= 20; |
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my $ua = _get_ua(); |
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$ua->default_header( referer => $url ); |
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86
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my @cs; # 保存得到的 sub category |
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while ( $retry > 0 ) { |
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print "GETING: $url\n" if $DEBUG; |
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my $res = $ua->get( $url ); |
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if ( $res->is_success ) { |
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my $t = HTML::TreeBuilder->new_from_content( $res->content ); |
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my @cates = $t->look_down( _tag => 'ul', id => 'zg_browseRoot' ); |
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@cates = map { $_->look_down( _tag => 'a' ) } @cates; |
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my $index = 1; |
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foreach ( @cates ) { |
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push @cs, { |
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index => $index, |
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name => $_->as_trimmed_text, |
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url => $_->attr( 'href' ) |
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}; |
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$index++; |
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} |
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last; |
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} else { |
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print "Retry: $retry\tGet fails: " . $res->code. "\n" if $DEBUG; |
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$ua->default_header( agent => rand_ua("") ); |
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sleep( 2 ); |
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$retry--; |
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} |
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} |
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return \@cs; |
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} |
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118
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=head1 AUTHOR |
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120
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MC Cheung, C<< >> |
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122
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=head1 BUGS |
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Please report any bugs or feature requests to C, or through |
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the web interface at L. I will be notified, and then you'll |
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automatically be notified of progress on your bug as I make changes. |
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=head1 SUPPORT |
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133
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perldoc WWW::Amazon::BestSeller |
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135
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=over 4 |
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137
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=item * RT: CPAN's request tracker (report bugs here) |
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L |
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141
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=item * AnnoCPAN: Annotated CPAN documentation |
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143
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L |
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145
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=item * CPAN Ratings |
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L |
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=item * Search CPAN |
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L |
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=back |
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=cut |
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1; # End of WWW::Amazon::BestSeller |