version 1.1, 2005/05/02 20:37:28 |
version 1.12, 2006/05/15 19:47:04 |
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package BT::OBTMetaInfo; |
# $RedRiver: Cached.pm,v 1.11 2005/05/21 00:05:13 andrew Exp $ |
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use strict; |
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package BT::MetaInfo::Cached; |
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require 5.6.0; |
require 5.6.0; |
use strict; |
use vars qw( $VERSION @ISA ); |
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use Cache::FileCache; |
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use File::Basename; |
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use Digest::MD5; |
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use BT::MetaInfo; |
use BT::MetaInfo; |
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use base 'BT::MetaInfo'; |
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$VERSION = do { my @r = (q$Revision$ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; |
$VERSION = do { my @r = (q$Id$ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; |
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sub new |
sub new |
{ |
{ |
my $classname = shift; |
my $class = shift; |
my $pass = shift; |
my $file = shift; |
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my $cache_settings = shift; |
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my $self = $classname->SUPER::new(@_); |
if (ref $file eq 'HASH') { |
} |
$cache_settings = $file; |
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$file = undef; |
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} |
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$cache_settings->{namespace} ||= 'BT::MetaInfo::Cached'; |
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$cache_settings->{default_expires_in} ||= 7 * 24 * 60 * 60; |
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$cache_settings->{auto_purge_interval} ||= 1 * 1 * 10 * 60; |
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sub info_hash { return(sha1(bencode($_[0]->info))); } |
my $cache = new Cache::FileCache( $cache_settings ); |
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my $obj = (defined($file)) ? _load($file, $cache) : {}; |
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bless($obj, $class); |
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$obj->{cache} = $cache; |
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return $obj; |
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} |
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sub _load { |
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my $file = shift; |
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my $cache = shift; |
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my $basename = basename($file); |
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my $info = $cache->get( $basename ); |
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my $md5; |
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if (defined $info && $info->{'md5'}) { |
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my $old_md5 = delete $info->{'md5'}; |
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my $cur_md5 = _MD5_file($file); |
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if ($old_md5 ne $cur_md5) { |
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$cache->remove( $basename ); |
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$info = undef; |
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} |
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$md5 = $cur_md5; |
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} |
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unless (defined $info) { |
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$info = BT::MetaInfo::_load($file); |
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$info->{'md5'} = $md5; |
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$cache->set( $basename, $info ); |
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delete $info->{'md5'}; |
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} |
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return $info; |
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} |
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sub save |
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{ |
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my $self = shift; |
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my $file = shift; |
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my $basename = basename($file); |
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my $cache = delete $self->{'cache'}; |
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if ( $self->SUPER::save($file, @_) ) { |
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my %info_hash = %$self; # unbless |
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$info_hash{'md5'} = _MD5_file($file); |
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$cache->set($basename, \%info_hash) |
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} |
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$self->{'cache'} = $cache; |
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return 1; |
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} |
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sub _MD5_file |
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{ |
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my $file = shift; |
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my $ctx = Digest::MD5->new; |
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open my $fh, $file or die "Couldn't open FILE '$file': $!"; |
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binmode $fh; |
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$ctx->addfile($fh); |
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close $fh; |
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return $ctx->hexdigest; |
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} |