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package WWW::RobotRules::AnyDBM_File; |
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require WWW::RobotRules; |
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@ISA = qw(WWW::RobotRules); |
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$VERSION = "6.00"; |
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use Carp (); |
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use AnyDBM_File; |
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use Fcntl; |
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use strict; |
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1247
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=head1 NAME |
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WWW::RobotRules::AnyDBM_File - Persistent RobotRules |
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=head1 SYNOPSIS |
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require WWW::RobotRules::AnyDBM_File; |
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require LWP::RobotUA; |
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# Create a robot useragent that uses a diskcaching RobotRules |
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my $rules = WWW::RobotRules::AnyDBM_File->new( 'my-robot/1.0', 'cachefile' ); |
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my $ua = WWW::RobotUA->new( 'my-robot/1.0', 'me@foo.com', $rules ); |
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# Then just use $ua as usual |
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$res = $ua->request($req); |
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=head1 DESCRIPTION |
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This is a subclass of I that uses the AnyDBM_File |
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package to implement persistent diskcaching of F and host |
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visit information. |
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The constructor (the new() method) takes an extra argument specifying |
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the name of the DBM file to use. If the DBM file already exists, then |
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you can specify undef as agent name as the name can be obtained from |
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the DBM database. |
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=cut |
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sub new |
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{ |
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my ($class, $ua, $file) = @_; |
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Carp::croak('WWW::RobotRules::AnyDBM_File filename required') unless $file; |
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my $self = bless { }, $class; |
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$self->{'filename'} = $file; |
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tie %{$self->{'dbm'}}, 'AnyDBM_File', $file, O_CREAT|O_RDWR, 0640 |
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or Carp::croak("Can't open $file: $!"); |
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if ($ua) { |
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$self->agent($ua); |
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} |
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else { |
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# Try to obtain name from DBM file |
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$ua = $self->{'dbm'}{"|ua-name|"}; |
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2
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100
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Carp::croak("No agent name specified") unless $ua; |
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} |
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3
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10
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$self; |
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} |
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sub agent { |
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1
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my($self, $newname) = @_; |
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my $old = $self->{'dbm'}{"|ua-name|"}; |
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5
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100
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if (defined $newname) { |
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2
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$newname =~ s!/?\s*\d+.\d+\s*$!!; # loose version |
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2
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unless ($old && $old eq $newname) { |
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# Old info is now stale. |
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2
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6
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my $file = $self->{'filename'}; |
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2
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3
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untie %{$self->{'dbm'}}; |
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72
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2
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tie %{$self->{'dbm'}}, 'AnyDBM_File', $file, O_TRUNC|O_RDWR, 0640; |
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183
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73
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2
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%{$self->{'dbm'}} = (); |
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2
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$self->{'dbm'}{"|ua-name|"} = $newname; |
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} |
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} |
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5
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15
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$old; |
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} |
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sub no_visits { |
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0
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my ($self, $netloc) = @_; |
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my $t = $self->{'dbm'}{"$netloc|vis"}; |
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100
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return 0 unless $t; |
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4
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(split(/;\s*/, $t))[0]; |
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} |
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87
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sub last_visit { |
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my ($self, $netloc) = @_; |
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my $t = $self->{'dbm'}{"$netloc|vis"}; |
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2
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return undef unless $t; |
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2
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(split(/;\s*/, $t))[1]; |
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} |
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sub fresh_until { |
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0
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my ($self, $netloc, $fresh) = @_; |
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my $old = $self->{'dbm'}{"$netloc|exp"}; |
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100
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if ($old) { |
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3
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$old =~ s/;.*//; # remove cleartext |
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} |
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6
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if (defined $fresh) { |
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2
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$fresh .= "; " . localtime($fresh); |
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$self->{'dbm'}{"$netloc|exp"} = $fresh; |
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} |
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6
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$old; |
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} |
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107
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sub visit { |
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4
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0
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my($self, $netloc, $time) = @_; |
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66
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15
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$time ||= time; |
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111
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my $count = 0; |
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my $old = $self->{'dbm'}{"$netloc|vis"}; |
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100
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if ($old) { |
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my $last; |
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($count,$last) = split(/;\s*/, $old); |
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2
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100
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$time = $last if $last > $time; |
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} |
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$count++; |
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$self->{'dbm'}{"$netloc|vis"} = "$count; $time; " . localtime($time); |
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} |
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122
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sub push_rules { |
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4
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0
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my($self, $netloc, @rules) = @_; |
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6
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my $cnt = 1; |
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$cnt++ while $self->{'dbm'}{"$netloc|r$cnt"}; |
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127
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foreach (@rules) { |
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$self->{'dbm'}{"$netloc|r$cnt"} = $_; |
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$cnt++; |
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} |
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} |
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133
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sub clear_rules { |
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4
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4
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0
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my($self, $netloc) = @_; |
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4
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8
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my $cnt = 1; |
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4
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while ($self->{'dbm'}{"$netloc|r$cnt"}) { |
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4
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133
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delete $self->{'dbm'}{"$netloc|r$cnt"}; |
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$cnt++; |
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} |
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} |
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142
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sub rules { |
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4
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4
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0
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18
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my($self, $netloc) = @_; |
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4
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8
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my @rules = (); |
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4
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4
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my $cnt = 1; |
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4
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6
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while (1) { |
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63
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my $rule = $self->{'dbm'}{"$netloc|r$cnt"}; |
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12
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100
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35
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last unless $rule; |
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14
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push(@rules, $rule); |
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12
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$cnt++; |
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} |
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4
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127
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@rules; |
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} |
154
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155
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sub dump |
156
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0
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0
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0
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{ |
157
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} |
158
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159
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1; |
160
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161
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=head1 SEE ALSO |
162
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163
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L, L |
164
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165
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=head1 AUTHORS |
166
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167
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Hakan Ardo Ehakan@munin.ub2.lu.se>, Gisle Aas Eaas@sn.no> |
168
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169
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=cut |
170
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