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package SWISH::Filters::ImageToMD5Xml; |
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use strict; |
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use warnings; |
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use base 'SWISH::Filters::Base'; |
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use Digest::MD5 qw(md5); |
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use XML::Simple; |
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=head1 NAME |
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SWISH::Filters::ImageToMD5Xml - Adds MD5 information when filtering an image for SWISHE. |
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=head1 VERSION |
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Version 0.04 |
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=cut |
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our $VERSION = '0.04'; |
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=head1 SYNOPSIS |
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A L that takes an incoming image XML and applies a MD5 checksum |
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against the binary content of the image. |
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The XML structure this filter expects includes an C element containing |
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the Base64 string representing the image. If that element (tag) is not found, |
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no filter is applied. |
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=head1 METHODS |
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=head2 new ( $class ) |
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Constructor. |
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=cut |
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sub new { |
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my ( $class ) = @_; |
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$class = ref $class || $class; |
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my $self = bless { }, $class; |
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return $self->_init; |
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} |
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sub _init { |
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my ( $self ) = @_; |
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$self->use_modules(qw/MIME::Base64 Search::Tools::XML XML::Simple/); |
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my @mimetypes = ( |
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'application/xml' |
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); |
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$self->{mimetypes} = \@mimetypes; |
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return $self; |
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} |
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sub _parse_xml { |
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my ( $self, $xml ) = @_; |
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if ( $xml ) { |
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return XMLin($xml); |
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} |
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} |
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=head2 filter( $self, $doc ) |
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Generates XML meta data for indexing. If I<$doc> contains the C element (tag) |
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then a MD5 checksum string will be added to the XML and returned with a new root element C. |
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=cut |
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sub filter { |
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my ( $self, $doc ) = @_; |
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return if $doc->is_binary; |
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if ( my $xml = $doc->fetch_filename ) { |
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if ( my $ds = $self->_parse_xml($xml) ) { |
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return unless exists $ds->{b64_data}; |
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$ds->{md5} = md5($ds->{b64_data}); |
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my $xml = Search::Tools::XML->perl_to_xml($ds, { root => 'image_data' }); |
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$doc->set_content_type('application/xml'); |
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return ( \$xml ); |
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} |
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} |
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return; |
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} |
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=head1 AUTHOR |
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Logan Bell, C<< >> |
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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 SWISH::Filters::ImageToMD5Xml |
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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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=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 ACKNOWLEDGEMENTS |
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=head1 LICENSE AND COPYRIGHT |
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Copyright 2011 Logan Bell. |
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This program is free software; you can redistribute it and/or modify it |
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under the terms of either: the GNU General Public License as published |
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by the Free Software Foundation; or the Artistic License. |
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See http://dev.perl.org/licenses/ for more information. |
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=cut |
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1; # End of SWISH::Filters::ImageToMD5Xml |