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package WWW::RSSFeed; |
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23061
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use 5.006; |
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use strict; |
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use warnings; |
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use threads qw(stringify); |
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use threads::shared; |
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use WWW::Mechanize; |
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use Domain::PublicSuffix; |
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use XML::RSS; |
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use HTML::Summary; |
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use HTML::TreeBuilder; |
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use HTML::Scrubber; |
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require Exporter; |
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our @ISA = qw(Exporter); |
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our %EXPORT_TAGS = ( 'all' => [ qw( |
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%feed_content_hr |
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) ] ); |
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our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } ); |
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our @EXPORT = qw( |
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getFeed |
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); |
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our $VERSION = '0.01'; |
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our %feed_content_hr : shared; |
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=head1 NAME |
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WWW::RSSFeed - Perl extension for creating RSS feeds from website(s). |
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=head1 VERSION |
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Version 0.01 |
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=head1 SYNOPSIS |
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use strict; |
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use WWW::RSSFeed; |
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my %input = ( |
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'url' => 'http://www.yahoo.com/', # required |
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'max_items' => 100, #optional |
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'min_description_word_limit' => 50, #optional |
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); |
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my $feedObj = new WWW::RSSFeed(\%input); |
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my $feedFile = $feedObj->getFeed(); |
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54
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=head1 DESCRIPTION |
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RSSFeed module can be used to create RSS feeds from website(s). This |
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module is provided as it is, the user is responsible if this module is used |
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to aggresively spider websites other than that of owner's. This activity may cause legal |
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obligations, so the user is hereby made aware. Use this on your own website. |
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=head2 METHODS |
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new() - The new subroutine. |
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getFeed() - Returns feed as a scalar. |
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__get_url_contents() - Returns global hash with title, link, description, links to other pages |
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in same domain and serial number. Increments global item count and |
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adds links to global hash. |
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=head1 SEE ALSO |
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This module is used at http://www.feedify.me/ ; a not for profit service from author |
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for webmasters. |
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=head1 AUTHOR |
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Kunal Jaiswal |
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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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You can find documentation for this module with the perldoc command. |
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perldoc WWW::RSSFeed |
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You can also look for information at: |
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=over 4 |
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=item * RT: CPAN's request tracker (report bugs here) |
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L |
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102
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=item * AnnoCPAN: Annotated CPAN documentation |
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L |
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=item * CPAN Ratings |
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=item * Search CPAN |
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=back |
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=head1 COPYRIGHT AND LICENSE |
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118
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Copyright (C) 2012 by Kunal Jaiswal |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself, either Perl version 5.12.4 or, |
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at your option, any later version of Perl 5 you may have available. |
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=cut |
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###################################################################### |
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###################################################################### |
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####### ######### |
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####### new subroutine to define basic information. ######### |
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####### ######### |
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###################################################################### |
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###################################################################### |
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sub new{ |
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my ( $pkg, $input ) = @_; |
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my $obj = $input; |
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@_=(); |
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140
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## Set optional parameter if not supplied. |
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if(!$obj->{'max_items'}){ |
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$obj->{'max_items'} = 20; |
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} |
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145
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if(!$obj->{'min_description_word_limit'}){ |
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$obj->{'min_description_word_limit'} = 50; |
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} |
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149
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$feed_content_hr{'counter'} = 1; |
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151
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bless( $obj, ref($pkg) || $pkg ); |
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153
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return $obj; |
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} |
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157
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###################################################################### |
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###################################################################### |
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####### ######### |
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####### Returns feed filename or feed as a scalar. ######### |
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####### ######### |
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###################################################################### |
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###################################################################### |
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165
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sub getFeed{ |
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167
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my ( $self ) = @_; |
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@_=(); |
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threads->create(\&__get_url_contents, $self)->join(); |
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172
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return $self->__create_rss(); |
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} |
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###################################################################### |
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###################################################################### |
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####### ######### |
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####### Returns global hash with title, link, description, ######### |
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####### links to other pages in same domain and serial ######### |
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####### number. Increments global item count and adds ######### |
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####### links to global hash. Only to be called with ######### |
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####### threads. ######### |
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####### ######### |
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###################################################################### |
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###################################################################### |
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187
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sub __get_url_contents{ |
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my $self; |
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($self) = @_ if(@_); |
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undef @_; |
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195
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if($feed_content_hr{$self->{'url'}}){ return ; } |
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my $mech = WWW::Mechanize->new( timeout => 0.99 ); |
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$mech->get($self->{'url'}); |
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200
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my $tree = new HTML::TreeBuilder; |
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my $html_content = $mech->content(); |
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203
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my $scrubber = HTML::Scrubber->new; |
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$scrubber->default(1); |
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$scrubber->deny(qw[script style]); |
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208
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$html_content = $scrubber->scrub($html_content); |
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210
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$tree->parse( $html_content ); |
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my $summarizer = new HTML::Summary( |
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LENGTH => 1500, |
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USE_META => 1, |
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); |
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my $summary = $summarizer->generate($tree); |
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218
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$feed_content_hr{$self->{'url'}} = &share({}); |
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$feed_content_hr{$self->{'url'}}{'title'} = $mech->title(); |
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$feed_content_hr{$self->{'url'}}{'description'} = $summary; |
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222
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my $unwanted_files = 'css|js|jpg|jpeg|png|bmp|gif|tif|tiff|svg'; |
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my @links = $mech->find_all_links( tag_regex => qr/^a$/, |
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url_regex => qr/[^$unwanted_files]$/); |
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226
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my $suffix = new Domain::PublicSuffix ({}); |
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228
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@links = $self->__get_valid_links($suffix->get_root_domain($self->__root_domain($self->{'url'})), $suffix, @links); |
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230
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foreach my $link(@links){ |
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if (($feed_content_hr{'counter'} < $self->{'max_items'}) && ($link)){ |
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$self->{'url'} = $link; |
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$feed_content_hr{'counter'}++; |
234
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my $thread = threads->new(\&__get_url_contents, $self); |
235
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$thread->join(); |
236
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} |
237
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} |
238
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} |
239
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###################################################################### |
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###################################################################### |
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####### ######### |
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####### Gives the root domain from a given url. ######### |
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####### ######### |
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sub __root_domain{ |
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my ( $self, $url ) = @_; |
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@_=(); |
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$url =~ /([^:]*:\/\/)?([^\/]+)/g; |
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return $2; |
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} |
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###################################################################### |
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###################################################################### |
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####### ######### |
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####### Gives the root domain from a given url. ######### |
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####### ######### |
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###################################################################### |
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sub __get_valid_links{ |
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my ( $self, $url, $suffix, @links ) = @_; |
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@_=(); |
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@links = map { $_ = $self->__get_inbound_links($url, $suffix, $_->url()); } @links; |
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##Send unique links |
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@links = keys %{{ map { $_ => 1 } @links }}; |
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return @links; |
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} |
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###################################################################### |
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###################################################################### |
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####### ######### |
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####### Gives the root domain from a given url. ######### |
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####### ######### |
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###################################################################### |
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###################################################################### |
285
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286
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sub __get_inbound_links{ |
287
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288
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my ($self, $url, $suffix, $current_link) = @_; |
289
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@_=(); |
290
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291
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if(($current_link =~ /^http/) |
292
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&& ($suffix->get_root_domain($self->__root_domain($current_link)) ne $url)){ |
293
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return ''; |
294
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} |
295
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296
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if($current_link =~ /$url/){ return $current_link; } |
297
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298
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if($current_link !~ /^mailto:|javascript|\#/g){ |
299
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300
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if($current_link !~ /^\//){ $current_link = '/'.$current_link; } |
301
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$current_link = "http://".$url.$current_link; |
302
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303
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}else{ |
304
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$current_link = ''; |
305
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} |
306
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307
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return $current_link; |
308
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309
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} |
310
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311
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###################################################################### |
312
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###################################################################### |
313
|
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|
|
|
|
####### ######### |
314
|
|
|
|
|
|
|
####### Gives the root domain from a given url. ######### |
315
|
|
|
|
|
|
|
####### ######### |
316
|
|
|
|
|
|
|
###################################################################### |
317
|
|
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|
|
###################################################################### |
318
|
|
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|
319
|
|
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|
|
sub __create_rss{ |
320
|
|
|
|
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|
|
321
|
|
|
|
|
|
|
my ($self) = @_; |
322
|
|
|
|
|
|
|
@_=(); |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
my $rss = XML::RSS->new (version => '2.0'); |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
foreach my $url(keys %feed_content_hr){ |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
if($url ne 'counter'){ |
329
|
|
|
|
|
|
|
$rss->add_item(title => $feed_content_hr{$url}{'title'}, |
330
|
|
|
|
|
|
|
link => $url, |
331
|
|
|
|
|
|
|
description => $feed_content_hr{$url}{'description'}); |
332
|
|
|
|
|
|
|
} |
333
|
|
|
|
|
|
|
} |
334
|
|
|
|
|
|
|
|
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
return $rss->as_string; |
337
|
|
|
|
|
|
|
} |
338
|
|
|
|
|
|
|
|
339
|
|
|
|
|
|
|
1; # End of WWW::RSSFeed |
340
|
|
|
|
|
|
|
__END__ |