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package Dezi::Aggregator; |
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use Moose; |
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with 'Dezi::Role'; |
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use Carp; |
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use Types::Standard qw( Bool Str InstanceOf Int Object ); |
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use Dezi::Types qw( DeziFileOrCodeRef DeziEpoch ); |
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use Dezi::Utils; |
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use SWISH::Filter; |
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use Dezi::Indexer::Doc; |
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use Scalar::Util qw( blessed ); |
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use Data::Dump qw( dump ); |
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use namespace::autoclean; |
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our $VERSION = '0.014'; |
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has 'set_parser_from_type' => ( is => 'rw', isa => Bool, default => sub {1} ); |
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has 'indexer' => ( |
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is => 'rw', |
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isa => InstanceOf ['Dezi::Indexer'], |
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); |
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has 'doc_class' => ( |
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is => 'rw', |
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isa => Str, |
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required => 1, |
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default => sub {'Dezi::Indexer::Doc'}, |
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); |
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has 'swish_filter_obj' => ( |
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is => 'rw', |
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isa => InstanceOf ['SWISH::Filter'], |
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default => sub { SWISH::Filter->new } |
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); |
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has 'test_mode' => ( is => 'rw', isa => Bool, default => sub {0} ); |
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has 'filter' => ( is => 'rw', isa => DeziFileOrCodeRef, coerce => 1, ); |
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has 'ok_if_newer_than' => ( is => 'rw', isa => DeziEpoch ); |
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has 'progress' => ( is => 'rw', isa => Object ); # Term::ProgressBar |
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has 'count' => ( is => 'ro', isa => Int ); |
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=pod |
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=head1 NAME |
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Dezi::Aggregator - document aggregation base class |
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=head1 SYNOPSIS |
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package MyAggregator; |
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use Moose; |
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extends 'Dezi::Aggregator'; |
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sub get_doc { |
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my ($self, $url) = @_; |
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# do something to create a Dezi::Indexer::Doc object from $url |
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return $doc; |
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} |
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sub crawl { |
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my ($self, @where) = @_; |
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foreach my $place (@where) { |
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# do something to search $place for docs to pass to get_doc() |
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} |
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} |
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1; |
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=head1 DESCRIPTION |
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Dezi::Aggregator is a base class that defines the basic API for writing |
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an aggregator. Only two methods are required: get_doc() and crawl(). See |
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the SYNOPSIS for the prototypes. |
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See Dezi::Aggregator::FS and Dezi::Aggregator::Spider for examples |
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of aggregators that crawl the filesystem and web, respectively. |
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=head1 METHODS |
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=head2 BUILD |
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Set object flags per Dezi::Class API. These are also accessors, |
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and include: |
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=over |
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=item set_parser_from_type |
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This will set the parser() value in swish_filter() based on the |
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MIME type of the doc_class() object. |
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=item indexer |
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A Dezi::Indexer object. |
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=item doc_class |
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The name of the Dezi::Indexer::Doc-derived class to use in get_doc(). |
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Default is Dezi::Indexer::Doc. |
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=item swish_filter_obj |
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A SWISH::Filter object. If not passed in new() one is created for you. |
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=item test_mode |
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Dry run mode, just prints info on stderr but does not |
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build index. |
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=item filter |
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Value should be a CODE ref. This is passed through to set_filter() |
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internally at BUILD() time. If you need to adjust the filter |
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after the Aggregator object is created, use set_filter(). |
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=item ok_if_newer_than |
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Value should be a Unix timestamp (epoch seconds). Default is undef. |
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If set, aggregators should skip files that have a modification time |
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older than the timestamp. |
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You may get/set the ok_if_newer_than value with the ok_if_newer_than() |
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attribute method, but use set_ok_if_newer_than() to include validation |
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of the supplied I<timestamp> value. |
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=item progress( I<Term::ProgressBar object> ) |
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Get/set a progress object. The default used in the examples/swish3 |
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script is Term::ProgressBar. If set, it will be incremented |
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just like count() is. |
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=back |
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=cut |
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sub BUILD { |
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my $self = shift; |
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$self->{__progress_so_far} = 0; |
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$self->{__progress_next} = 0; |
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if ( $self->filter ) { |
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$self->set_filter( $self->filter ); |
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} |
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} |
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=head2 config |
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Returns the Dezi::Indexer::Config object from the Indexer |
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being used. This is a read-only method (accessor not mutator). |
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=cut |
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sub config { |
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return shift->indexer->config; |
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} |
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=head2 count |
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Returns the total number of doc_class() objects returned by get_doc(). |
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=cut |
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164
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=head2 crawl( I<@where> ) |
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Override this method in your subclass. It does the aggregation, |
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and passes each doc_class() object from get_doc() to indexer->process(). |
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=cut |
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171
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sub crawl { |
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my $self = shift; |
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confess ref($self) . " does not implement crawl()"; |
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} |
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=head2 get_doc( I<url> ) |
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Override this method in your subclass. Should return a doc_class() |
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object. |
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=cut |
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183
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sub get_doc { |
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my $self = shift; |
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confess ref($self) . " does not implement get_doc()"; |
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} |
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188
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=head2 swish_filter( I<doc_class_object> ) |
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Passes the content() of the I<doc_class_object> through SWISH::Filter |
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and transforms it to something index-able. Returns |
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the I<doc_class_object>, filtered. |
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B<NOTE:> This method should be called by all aggregators after |
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get_doc() and before passing to the indexer(). |
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197
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See the SWISH::Filter documentation. |
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=cut |
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201
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sub swish_filter { |
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my $self = shift; |
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my $doc = shift; |
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unless ( $doc && blessed($doc) && $doc->isa('Dezi::Indexer::Doc') ) { |
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croak "Dezi::Indexer::Doc-derived object required"; |
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} |
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208
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if ( $self->debug ) { |
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warn "checking filter for " . $doc->url; |
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} |
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unless ( defined $doc->parser ) { |
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if ( $self->set_parser_from_type ) { |
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my $type = $doc->type || 'default'; |
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$doc->parser( |
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Dezi::Utils->get_parser_for_mime( |
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$type, |
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( $self->indexer ? $self->indexer->swish3 : undef ), |
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) |
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); |
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} |
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} |
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224
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my $sfo = $self->swish_filter_obj; |
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226
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if ( $sfo->can_filter( $doc->type ) ) { |
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228
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if ( $self->debug ) { |
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warn sprintf |
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"debug=%d can_filter true for %s with parser %s for type %s", |
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$self->debug, $doc->url, |
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$doc->parser, $doc->type; |
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} |
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235
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my $content = $doc->content; |
236
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my $url = $doc->url; |
237
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my $type = $doc->type; |
238
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my $f = $sfo->convert( |
239
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document => \$content, |
240
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content_type => $type, |
241
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name => $url |
242
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); |
243
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244
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if ( !$f |
245
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|| !$f->was_filtered |
246
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|| $f->is_binary ) # is is_binary necessary? |
247
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{ |
248
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warn "skipping $url - filtering error\n"; |
249
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return; |
250
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} |
251
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252
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if ( $self->debug > 1 ) { |
253
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warn "$url [$type] was filtered\n"; |
254
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if ( $doc->content ne ${ $f->fetch_doc } ) { |
255
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warn sprintf "content changed:'%s'\n", ${ $f->fetch_doc }; |
256
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} |
257
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} |
258
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259
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$doc->content( ${ $f->fetch_doc } ); |
260
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261
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# leave type and parser as-is |
262
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# since we want to store original mime in indexer. |
263
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# TODO test this. |
264
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# what about parser? |
265
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# since type will have changed ( $f->content_type ) from original |
266
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# the parser type might also have changed? |
267
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268
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$doc->parser( $f->swish_parser_type ) if $self->set_parser_from_type; |
269
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270
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} |
271
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else { |
272
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273
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if ( $self->debug ) { |
274
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warn sprintf( |
275
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"No filter applied to %s - cannot filter %s (parser %s)\n", |
276
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$doc->url, $doc->type, $doc->parser, ); |
277
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warn sprintf( " available filter: %s\n", $_ ) |
278
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for $sfo->filter_list; |
279
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} |
280
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281
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} |
282
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283
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} |
284
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285
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|
=head2 set_filter( I<code_ref> ) |
286
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287
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|
|
Use I<code_ref> as the C<doc_class> filter. This method called by BUILD() if |
288
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|
C<filter> param set in constructor. |
289
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290
|
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|
|
=cut |
291
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292
|
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|
|
sub set_filter { |
293
|
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|
my $self = shift; |
294
|
|
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|
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|
|
my $filter = shift; |
295
|
|
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|
|
|
|
unless ( ref($filter) eq 'CODE' ) { |
296
|
|
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|
|
|
croak "filter must be a CODE ref"; |
297
|
|
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|
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|
|
} |
298
|
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299
|
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|
|
# cheat a little by using this code instead of the default |
300
|
|
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|
|
# method in doc_class |
301
|
|
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|
|
{ |
302
|
|
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|
|
|
|
no strict 'refs'; |
303
|
|
|
|
|
|
|
no warnings 'redefine'; |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
#warn "setting filter as method: " . $self->{doc_class} . '::filter'; |
306
|
|
|
|
|
|
|
*{ $self->{doc_class} . '::filter' } = $filter; |
307
|
|
|
|
|
|
|
} |
308
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
} |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
=head2 set_ok_if_newer_than( I<timestamp> ) |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
Set the ok_if_newer_than attribute. I<timestamp> should be a Unix |
314
|
|
|
|
|
|
|
epoch value. |
315
|
|
|
|
|
|
|
|
316
|
|
|
|
|
|
|
=cut |
317
|
|
|
|
|
|
|
|
318
|
|
|
|
|
|
|
sub set_ok_if_newer_than { |
319
|
|
|
|
|
|
|
my $self = shift; |
320
|
|
|
|
|
|
|
my $ts = shift || 0; |
321
|
|
|
|
|
|
|
if ( $ts =~ m/\D/ ) { |
322
|
|
|
|
|
|
|
croak "timestamp should be an integer"; |
323
|
|
|
|
|
|
|
} |
324
|
|
|
|
|
|
|
$self->ok_if_newer_than($ts); |
325
|
|
|
|
|
|
|
} |
326
|
|
|
|
|
|
|
|
327
|
|
|
|
|
|
|
# |
328
|
|
|
|
|
|
|
# private methods |
329
|
|
|
|
|
|
|
# |
330
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
sub _increment_count { |
332
|
|
|
|
|
|
|
my $self = shift; |
333
|
|
|
|
|
|
|
my $count = shift || 1; |
334
|
|
|
|
|
|
|
$self->{count} += $count; |
335
|
|
|
|
|
|
|
if ( $self->{progress} ) { |
336
|
|
|
|
|
|
|
$self->{__progress_so_far} += $count; |
337
|
|
|
|
|
|
|
if ( $self->{__progress_so_far} >= $self->{__progress_next} ) { |
338
|
|
|
|
|
|
|
$self->{__progress_next} |
339
|
|
|
|
|
|
|
= $self->{progress}->update( $self->{__progress_so_far} ); |
340
|
|
|
|
|
|
|
} |
341
|
|
|
|
|
|
|
} |
342
|
|
|
|
|
|
|
return $self; |
343
|
|
|
|
|
|
|
} |
344
|
|
|
|
|
|
|
|
345
|
|
|
|
|
|
|
sub _apply_file_rules { |
346
|
|
|
|
|
|
|
my ( $self, $file, $file_rules ) = @_; |
347
|
|
|
|
|
|
|
if ( !$file_rules |
348
|
|
|
|
|
|
|
&& !exists $self->{_file_rules} |
349
|
|
|
|
|
|
|
&& $self->config->FileRules ) |
350
|
|
|
|
|
|
|
{ |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
# cache obj |
353
|
|
|
|
|
|
|
$self->{_file_rules} = File::Rules->new( $self->config->FileRules ); |
354
|
|
|
|
|
|
|
} |
355
|
|
|
|
|
|
|
if ( $file_rules or exists $self->{_file_rules} ) { |
356
|
|
|
|
|
|
|
$self->debug and warn "$file [applying DeziFileRules]\n"; |
357
|
|
|
|
|
|
|
my $rules = $file_rules || $self->{_file_rules}; |
358
|
|
|
|
|
|
|
my $match = $rules->match($file); |
359
|
|
|
|
|
|
|
return $match; |
360
|
|
|
|
|
|
|
} |
361
|
|
|
|
|
|
|
return 0; # no rules |
362
|
|
|
|
|
|
|
} |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
sub _apply_file_match { |
365
|
|
|
|
|
|
|
my ( $self, $file ) = @_; |
366
|
|
|
|
|
|
|
|
367
|
|
|
|
|
|
|
# TODO |
368
|
|
|
|
|
|
|
return 0; # no-op for now |
369
|
|
|
|
|
|
|
} |
370
|
|
|
|
|
|
|
|
371
|
|
|
|
|
|
|
__PACKAGE__->meta->make_immutable; |
372
|
|
|
|
|
|
|
|
373
|
|
|
|
|
|
|
1; |
374
|
|
|
|
|
|
|
|
375
|
|
|
|
|
|
|
__END__ |
376
|
|
|
|
|
|
|
|
377
|
|
|
|
|
|
|
=head1 AUTHOR |
378
|
|
|
|
|
|
|
|
379
|
|
|
|
|
|
|
Peter Karman, E<lt>perl@peknet.comE<gt> |
380
|
|
|
|
|
|
|
|
381
|
|
|
|
|
|
|
=head1 BUGS |
382
|
|
|
|
|
|
|
|
383
|
|
|
|
|
|
|
Please report any bugs or feature requests to C<bug-swish-prog at rt.cpan.org>, or through |
384
|
|
|
|
|
|
|
the web interface at L<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Dezi-App>. |
385
|
|
|
|
|
|
|
I will be notified, and then you'll |
386
|
|
|
|
|
|
|
automatically be notified of progress on your bug as I make changes. |
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
=head1 SUPPORT |
389
|
|
|
|
|
|
|
|
390
|
|
|
|
|
|
|
You can find documentation for this module with the perldoc command. |
391
|
|
|
|
|
|
|
|
392
|
|
|
|
|
|
|
perldoc Dezi |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
|
395
|
|
|
|
|
|
|
You can also look for information at: |
396
|
|
|
|
|
|
|
|
397
|
|
|
|
|
|
|
=over 4 |
398
|
|
|
|
|
|
|
|
399
|
|
|
|
|
|
|
=item * Mailing list |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
L<http://lists.swish-e.org/listinfo/users> |
402
|
|
|
|
|
|
|
|
403
|
|
|
|
|
|
|
=item * RT: CPAN's request tracker |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Dezi-App> |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
=item * AnnoCPAN: Annotated CPAN documentation |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
L<http://annocpan.org/dist/Dezi-App> |
410
|
|
|
|
|
|
|
|
411
|
|
|
|
|
|
|
=item * CPAN Ratings |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
L<http://cpanratings.perl.org/d/Dezi-App> |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
=item * Search CPAN |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
L<http://search.cpan.org/dist/Dezi-App/> |
418
|
|
|
|
|
|
|
|
419
|
|
|
|
|
|
|
=back |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
422
|
|
|
|
|
|
|
|
423
|
|
|
|
|
|
|
Copyright 2008-2009 by Peter Karman |
424
|
|
|
|
|
|
|
|
425
|
|
|
|
|
|
|
This library is free software; you can redistribute it and/or modify |
426
|
|
|
|
|
|
|
it under the same terms as Perl itself. |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
=head1 SEE ALSO |
429
|
|
|
|
|
|
|
|
430
|
|
|
|
|
|
|
L<http://swish-e.org/> |