4 |
use strict; |
use strict; |
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use warnings; |
use warnings; |
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our $VERSION = '0.02'; |
our $VERSION = '0.06'; |
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use Carp; |
use Carp; |
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use File::Temp qw/ tempdir /; |
use File::Temp qw/ tempdir /; |
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#use YAML; |
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=head1 NAME |
=head1 NAME |
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=head1 METHODS |
=head1 METHODS |
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=head2 open |
=head2 new |
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Create new indexing object. |
Create new indexing object. |
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my $i = SWISH::PlusPlus->open( |
my $i = SWISH::PlusPlus->new( |
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index_dir => '/path/to/index', |
index_dir => '/path/to/index', |
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index => 'index++', |
index => 'index++', |
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search => 'search++', |
search => 'search++', |
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debug => 1, |
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meta_in_body => 1, |
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use_stopwords => 1, |
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); |
); |
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Options to open are following: |
Options to new are following: |
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=over 5 |
=over 5 |
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Full or partial path to SWISH++ search executable. By default, it's B<search>. |
Full or partial path to SWISH++ search executable. By default, it's B<search>. |
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=item C<debug> |
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This option (off by default) will produce a lot of debugging output on |
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C<STDERR> prefixed by C<##>. |
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=item C<meta_in_body> |
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This option (off by default) enables to search content of meta fields |
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without specifing them (like they are in body of document). This will |
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somewhat increate index size. |
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=item C<use_stopwords> |
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Use built-in SWISH++ stop words. By default, they are disabled. |
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=back |
=back |
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=cut |
=cut |
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sub open { |
sub new { |
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my $class = shift; |
my $class = shift; |
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my $self = {@_}; |
my $self = {@_}; |
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bless($self, $class); |
bless($self, $class); |
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croak "need $_" unless $self->{$_}; |
croak "need $_" unless $self->{$_}; |
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} |
} |
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if (! -e $self->{'index_dir'}) { |
my $index_dir = $self->{'index_dir'}; |
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mkdir $self->{'index_dir'} || confess "can't create index ",$self->{'index'},": $!"; |
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if ($index_dir !~ m#^/#) { |
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chomp(my $cwd = `pwd`); |
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$index_dir = "$cwd/$index_dir"; |
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print STDERR "## full path to index_dir: $index_dir\n" if ($self->{'debug'}); |
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$self->{'index_dir'} = $index_dir; |
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} |
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if (! -e $index_dir) { |
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mkdir $index_dir || confess "can't create index ",$self->{'index'},": $!"; |
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} |
} |
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|
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# default executables |
# default executables |
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$self->{'index'} ||= 'index'; |
$self->{'index'} ||= 'index'; |
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$self->{'search'} ||= 'search'; |
$self->{'search'} ||= 'search'; |
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print STDERR "## new index_dir: ",$index_dir," index: ",$self->{'index'}, " search: ",$self->{'search'},"\n" if ($self->{'debug'}); |
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$self ? return $self : return undef; |
$self ? return $self : return undef; |
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} |
} |
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=head2 check_bin |
=head2 check_bin |
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Check if swish++ binaries specified in L<open> are available and verify |
Check if swish++ binaries specified in L<new> are available and verify |
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version signature. |
version signature. |
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if ($i->check_bin) { |
if ($i->check_bin) { |
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return 1; |
return 1; |
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} |
} |
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=head2 add |
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Add document with metadata to index. |
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$i->add( |
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path => 'path/to/document', |
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title => 'this is result title', |
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meta => { |
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description => 'this is description meta tag', |
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date => '2004-11-04', |
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author => 'Dobrica Pavlinusic', |
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} |
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body => 'this is text without meta data', |
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); |
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This is thin wrapper round L<_create_doc>. |
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=cut |
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sub add { |
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my $self = shift; |
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$self->_create_doc(@_); |
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return 1; |
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} |
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=head2 search |
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Search your index. |
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my @results = $i->search("swhish query"); |
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Returns array with result IDs. |
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=cut |
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sub search { |
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my $self = shift; |
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my $query = shift || return; |
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$self->_close_index; |
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my @results; |
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# escape double quotes in query for shell |
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$query =~ s/"/\\"/g; |
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my $open_cmd = $self->{'search'}." -i ".$self->{'index_dir'}.'/index "'.$query.'" |'; |
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print STDERR "## search $open_cmd\n" if ($self->{'debug'}); |
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open(SEARCH, $open_cmd) || confess "can't start $open_cmd: $!"; |
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while(<SEARCH>) { |
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next if (/^#/); |
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chomp; |
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print STDERR "## $_\n" if ($self->{'debug'}); |
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my ($rank,$path,$size,$title) = split(/ /,$_,4); |
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push @results, { |
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rank => $rank, |
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path => $path, |
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size => $size, |
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title => $title, |
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} |
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} |
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close(SEARCH) || confess "can't close search"; |
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#print STDERR "## results: ",Dump(@results),"\n" if ($self->{'debug'}); |
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return @results; |
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} |
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=head2 finish_update |
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This method will close index. |
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$i->finish_update; |
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It will be called on DESTROY when $i goes out of scope. |
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=cut |
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sub finish_update { |
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my $self = shift; |
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$self->_close_index; |
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} |
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sub DESTROY { |
268 |
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my $self = shift; |
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$self->finish_update; |
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} |
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=head1 PRIVATE METHODS |
=head1 PRIVATE METHODS |
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Private methods implement internals for creating temporary file needed for |
Private methods implement internals for creating temporary file needed for |
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swish++. You should have no need to call them directly, and they are here |
swish++. You should have no need to call them directly, and they are here |
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just to have documentation. |
just to have documentation. |
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=head2 _init_index |
=head2 _init_indexer |
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Create temporary directory in which files for indexing will be created and |
Create temporary directory in which files for indexing will be created and |
281 |
start index process. |
start index process. |
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my $i->_init_index || die "can't start indexer"; |
my $i->_init_indexer || die "can't start indexer"; |
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It will also create empty file C<_stopwords_> to disable stop words. |
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287 |
=cut |
=cut |
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sub _init_index { |
sub _init_indexer { |
290 |
my $self = shift; |
my $self = shift; |
291 |
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292 |
$self->{'tmp_dir'} = tempdir( CLEANUP => 1 ) || confess "can't create temporary directory: $!"; |
$self->{'tmp_dir'} = tempdir( CLEANUP => 1 ) || confess "can't create temporary directory: $!"; |
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my $opt = "-v 4"; |
chdir $self->{'tmp_dir'} || confess "can't chdir to ".$self->{'tmp_dir'}.": $!"; |
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my $opt = "-v " . ($self->{'debug'} || '0'); |
297 |
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298 |
my $open_cmd = '| index '.$opt.' -e "html:*" -i '.$self->{'index_dir'}.'/index -'; |
unless ($self->{'use_stopwrods'}) { |
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open(STOP, '>', "_stopwords_") || carp "can't create empty stopword file, skipping\n"; |
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print STOP " "; |
301 |
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close(STOP); |
302 |
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$opt .= " -s _stopwords_"; |
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} |
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chdir $self->{'tmp_dir'} || confess "can't chdir to ".$self->{'tmp_dir'}.": $!"; |
my $open_cmd = '| '.$self->{'index'}.' '.$opt.' -e "html:*" -i '.$self->{'index_dir'}.'/index -'; |
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print STDERR "## open index $open_cmd\n" if ($self->{'index'}); |
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open($self->{'index_fh'}, $open_cmd) || confess "can't start index with $open_cmd: $!"; |
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CORE::open($self->{'index_fh'}, $open_cmd) || confess "can't start index with $open_cmd: $!"; |
|
311 |
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return $self->{'index_fh'}; |
return $self->{'index_fh'}; |
313 |
} |
} |
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|
319 |
$i->_create_doc( |
$i->_create_doc( |
320 |
path => 'path/to/store/in/index', |
path => 'path/to/store/in/index', |
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title => 'this is title in results', |
322 |
body => 'data to story in body tag', |
body => 'data to story in body tag', |
323 |
meta => { |
meta => { |
324 |
'meta name' => 'data for this meta', |
'meta name' => 'data for this meta', |
326 |
} |
} |
327 |
); |
); |
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To delete document, just omit body and meta data. |
330 |
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=cut |
=cut |
332 |
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sub _create_doc { |
sub _create_doc { |
336 |
my $arg = {@_}; |
my $arg = {@_}; |
337 |
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|
338 |
# open indexer if needed |
# open indexer if needed |
339 |
$self->{'index_fh'} ||= $self->_init_index; |
$self->{'index_fh'} ||= $self->_init_indexer; |
340 |
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my $path = $self->{'tmp_dir'} || confess "no tmp_dir?"; |
my $path = $self->{'tmp_dir'} || confess "no tmp_dir?"; |
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CORE::open(TMP, '>', $arg->{'path'}) || die "can't create temp file ".$arg->{'path'}.": $!"; |
open(TMP, '>', $arg->{'path'}) || die "can't create temp file ".$arg->{'path'}.": $!"; |
344 |
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345 |
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print TMP '<html><head>'; |
346 |
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|
347 |
print TMP '<html>'; |
$arg->{'body'} ||= ''; |
348 |
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|
349 |
if ($arg->{'meta'}) { |
if ($arg->{'meta'}) { |
350 |
confess "not yet implemented"; |
foreach my $name (keys %{$arg->{'meta'}}) { |
351 |
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my $content = $arg->{'meta'}->{$name}; |
352 |
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print TMP qq{<meta name="$name" content="$content">}; |
353 |
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$arg->{'body'} .= " $content" if ($self->{'meta_in_body'}); |
354 |
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} |
355 |
} |
} |
356 |
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|
357 |
print TMP '<body>' . ($arg->{'body'} || '') . '</body></html>'; |
if (defined($arg->{'title'})) { |
358 |
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print TMP '<title>' . ($arg->{'title'} || '') . '</title>'; |
359 |
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$arg->{'body'} .= " ".$arg->{'title'} if ($self->{'meta_in_body'}); |
360 |
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} |
361 |
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362 |
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print TMP '</head><body>' . $arg->{'body'} . '</body></html>'; |
363 |
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|
364 |
close(TMP) || confess "can't close tmp file ".$arg->{'path'}.": $!"; |
close(TMP) || confess "can't close tmp file ".$arg->{'path'}.": $!"; |
365 |
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|
366 |
print { $self->{'index_fh'} } $arg->{'path'}."\n"; |
print { $self->{'index_fh'} } $arg->{'path'}."\n"; |
367 |
} |
} |
368 |
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|
369 |
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=head2 _close_index |
370 |
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|
371 |
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Close index after indexing. |
372 |
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|
373 |
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$i->_close_index; |
374 |
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|
375 |
|
You have to close index before searching. |
376 |
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|
377 |
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=cut |
378 |
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|
379 |
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sub _close_index { |
380 |
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my $self = shift; |
381 |
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|
382 |
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return unless ($self->{'index_fh'}); |
383 |
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|
384 |
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print STDERR "## close index\n" if ($self->{'debug'}); |
385 |
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|
386 |
|
close($self->{'index_fh'}); |
387 |
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undef $self->{'index_fh'}; |
388 |
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} |
389 |
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|
390 |
1; |
1; |
391 |
__END__ |
__END__ |
392 |
|
|
401 |
Debian version of swish++ is often old (version 5 at moment of this writing |
Debian version of swish++ is often old (version 5 at moment of this writing |
402 |
while version 6 is available in source code), so this module by default |
while version 6 is available in source code), so this module by default |
403 |
uses executable names B<index> and B<search> for self-compiled version |
uses executable names B<index> and B<search> for self-compiled version |
404 |
instead of one from Debian package. See L<open> how to specify Debian |
instead of one from Debian package. See L<new> how to specify Debian |
405 |
default binaries B<index++> and B<search++>. |
default binaries B<index++> and B<search++>. |
406 |
|
|
407 |
=head1 SEE ALSO |
=head2 SWISH++ |
408 |
|
|
409 |
Mention other useful documentation such as the documentation of |
Aside from very good rewrite in C++, SWISH++ is fatster because it has |
410 |
related modules or operating system documentation (such as man pages |
claver heuristics about which data in input files are words to index and |
411 |
in UNIX), or any relevant external documentation such as RFCs or |
which are not. It's based on English language and might be best choice if |
412 |
standards. |
you plan to install large amount of long text documents. |
413 |
|
|
414 |
|
However, if you plan to index all data from structured storage (e.g. RDBMS) |
415 |
|
you might want B<all> words from data to end up in index as opposed to just |
416 |
|
those which look like English words. This is especially important if you |
417 |
|
don't plan to index English texts with this module. |
418 |
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|
419 |
|
With distribution build versions of SWISH++ you might have problems with |
420 |
|
disepearing words. To overcome this problem, you will have to compile and |
421 |
|
configure SWISH++ yourself (because language characteristics are |
422 |
|
compilation-time option). |
423 |
|
|
424 |
|
Compilation of SWISH++ is easy process well described on project's web |
425 |
|
pages. To see my very relaxed sample configuration take a look at C<swish++> |
426 |
|
directory included in distribution. |
427 |
|
|
428 |
|
=head2 SWISH++ config |
429 |
|
|
430 |
|
C<config.h> located in C<swish++> directory of this distribution is relaxed |
431 |
|
SWISH++ configuration that will index all words passed to it. This |
432 |
|
configuration is needed for B<date test> because default configuration |
433 |
|
doesn't recognize 2004-12-05 as date. Have in mind that your index size |
434 |
|
might explode. |
435 |
|
|
436 |
If you have a mailing list set up for your module, mention it here. |
=head1 SEE ALSO |
437 |
|
|
438 |
If you have a web site set up for your module, mention it here. |
C<swish++> web site L<http://homepage.mac.com/pauljlucas/software/swish/> |
439 |
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|
440 |
=head1 AUTHOR |
=head1 AUTHOR |
441 |
|
|
442 |
Dobrica Pavlinusic, E<lt>dpavlin@E<gt> |
Dobrica Pavlinusic, E<lt>dpavlin@rot13.orgE<gt> |
443 |
|
|
444 |
=head1 COPYRIGHT AND LICENSE |
=head1 COPYRIGHT AND LICENSE |
445 |
|
|