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package WWW::OpenSearch; |
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64915
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use strict; |
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use warnings; |
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use base qw( Class::Accessor::Fast ); |
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use Carp; |
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use WWW::OpenSearch::Agent; |
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use WWW::OpenSearch::Request; |
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use WWW::OpenSearch::Description; |
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use Encode (); |
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__PACKAGE__->mk_accessors( qw( description_url agent description ) ); |
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our $VERSION = '0.17'; |
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=head1 NAME |
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WWW::OpenSearch - Search A9 OpenSearch compatible engines |
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=head1 SYNOPSIS |
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use WWW::OpenSearch; |
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my $url = "http://bulkfeeds.net/opensearch.xml"; |
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my $engine = WWW::OpenSearch->new($url); |
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my $name = $engine->description->ShortName; |
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my $tags = $engine->description->Tags; |
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# Perform search for "iPod" |
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my $response = $engine->search("iPod"); |
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for my $item (@{$response->feed->items}) { |
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print $item->{description}; |
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} |
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# Retrieve the next page of results |
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my $next_page = $response->next_page; |
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for my $item (@{$next_page->feed->items}) { |
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print $item->{description}; |
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} |
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=head1 DESCRIPTION |
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WWW::OpenSearch is a module to search A9's OpenSearch compatible search |
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engines. See http://opensearch.a9.com/ for details. |
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=head1 CONSTRUCTOR |
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=head2 new( $url ) |
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Constructs a new instance of WWW::OpenSearch using the given |
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URL as the location of the engine's OpenSearch Description |
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document (retrievable via the description_url accessor). |
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=head1 METHODS |
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=head2 fetch_description( [ $url ] ) |
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Fetches the OpenSearch Descsription found either at the given URL |
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or at the URL specified by the description_url accessor. Fetched |
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description may be accessed via the description accessor. |
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=head2 search( $query [, \%params] ) |
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Searches the engine for the given query using the given |
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search parameters. Valid search parameters include: |
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=over 4 |
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=item * startPage |
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=item * totalResults |
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=item * startIndex |
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=item * itemsPerPage |
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=back |
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See http://opensearch.a9.com/spec/1.1/response/#elements for details. |
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=head2 do_search( $url [, $method] ) |
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Performs a request for the given URL and returns a |
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WWW::OpenSearch::Response object. Method defaults to 'GET'. |
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=head1 ACCESSORS |
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=head2 description_url( [$description_url] ) |
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=head2 agent( [$agent] ) |
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=head2 description( [$description] ) |
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=head1 AUTHOR |
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Brian Cassidy Ebricas@cpan.orgE |
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Tatsuhiko Miyagawa Emiyagawa@bulknews.netE |
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=head1 COPYRIGHT AND LICENSE |
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Copyright 2005-2013 by Tatsuhiko Miyagawa and Brian Cassidy |
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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. |
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=cut |
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sub new { |
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my ( $class, $url ) = @_; |
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croak( "No OpenSearch Description url provided" ) unless $url; |
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my $self = $class->SUPER::new; |
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$self->description_url( $url ); |
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$self->agent( WWW::OpenSearch::Agent->new() ); |
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$self->fetch_description; |
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return $self; |
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} |
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sub fetch_description { |
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my ( $self, $url ) = @_; |
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$url ||= $self->description_url; |
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$self->description_url( $url ); |
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my $response = $self->agent->get( $url ); |
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unless ( $response->is_success ) { |
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croak "Error while fetching $url: " . $response->status_line; |
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} |
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$self->description( |
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WWW::OpenSearch::Description->new( $response->content ) ); |
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} |
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sub search { |
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my ( $self, $query, $params, $url ) = @_; |
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$params ||= {}; |
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$params->{ searchTerms } = $query; |
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Encode::_utf8_off( $params->{ searchTerms } ); |
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$url ||= $self->description->get_best_url; |
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return $self->agent->search( |
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WWW::OpenSearch::Request->new( $url, $params ) ); |
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} |
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1; |