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package Bogofilter;
#
# Copyright (c) 2004, 2005 Josh Harding <josh@statewidesoftware.com>
# http://www.statewidesoftware.com/projects.shtml
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
use strict;
use Mail::SpamAssassin;
use Mail::SpamAssassin::Plugin;
our @ISA = qw(Mail::SpamAssassin::Plugin);
sub new {
my ( $class, $mailsa ) = @_;
$class = ref($class) || $class;
my $self = $class->SUPER::new($mailsa);
bless( $self, $class );
$self->register_eval_rule("check_bogofilter");
return $self;
}
sub check_bogofilter {
my ( $self, $permsgstatus, $fulltext, $min, $max ) = @_;
my $isspam = 0;
my $header = "";
my $return = "";
Mail::SpamAssassin::Plugin::dbg("BOGOFILTER: lookin at the mail");
Mail::SpamAssassin::Plugin::dbg("BOGOFILTER: min: $min max: $max");
if ( ! exists $permsgstatus->{bogoscore} ) {
my $tmpfile = $permsgstatus->create_fulltext_tmpfile($fulltext);
Mail::SpamAssassin::dbg("BOGOFILTER: permsgstatus $permsgstatus");
my $to = $permsgstatus->get('Received');
$to =~ /for (\S+\@\S+);/;
my $received = $1;
$received = lc($received);
$received = $self->stripUser($received);
my $cmd = "bogofilter -d /var/lib/bogofilter/$received -v < $tmpfile";
$return = `$cmd`;
Mail::SpamAssassin::dbg("BOGOFILTER: ran $cmd for $received");
Mail::SpamAssassin::dbg("BOGOFILTER: returned $return");
$permsgstatus->delete_fulltext_tmpfile();
$return =~ /spamicity\=([0-9\.]+)/;
$permsgstatus->{bogoscore} = $1;
if ($permsgstatus->{bogoscore} =~ /[A-Za-z]/)
{
$permsgstatus->{bogoscore} = 0.5;
}
}
else {
if ($permsgstatus->{bogoscore} =~ /[A-Za-z]/)
{
$permsgstatus->{bogoscore} = 0.5;
}
Mail::SpamAssassin::dbg("BOGOFILTER: already had a score!");
Mail::SpamAssassin::dbg("BOGOFILTER: the score is: " .
$permsgstatus->{bogoscore});
}
Mail::SpamAssassin::dbg("BOGOFILTER: spamicity=" . $permsgstatus->{bogoscore});
if ( $permsgstatus->{bogoscore} >= $min && $permsgstatus->{bogoscore} <= $max ) {
$isspam = 1;
}
$permsgstatus->{main}->{conf}->{headers_spam}->{"SA-Bogofilter"} = $permsgstatus->{bogoscore};
$permsgstatus->{main}->{conf}->{headers_ham}->{"SA-Bogofilter"} = $permsgstatus->{bogoscore};
return $isspam;
}
sub createUserDir {
my $self = shift;
my $user = shift;
my $dir = '/var/lib/bogofilter/' . $user;
if ( !-e $dir ) {
Mail::SpamAssassin::dbg("BOGOFILTER: gotta create directory! $dir");
mkdir $dir;
}
}
sub stripUser {
my $self = shift;
my $email = shift;
$email =~ /([A-Za-z\-\_]+?)\@/;
return $1;
}
sub autolearn {
my ( $self, $opts ) = @_;
my $isspam = $opts->{isspam};
Mail::SpamAssassin::Plugin::dbg(
"BOGOFILTER: message being learned as $isspam");
my $to = $opts->{permsgstatus}->get('Received');
Mail::SpamAssassin::Plugin::dbg("BOGOFILTER: Received $to");
$to =~ /for (\S+\@\S+);/;
my $received = $1;
$received = lc($received);
Mail::SpamAssassin::Plugin::dbg("BOGOFILTER: delivery to: $received");
$to = $self->stripUser($received);
Mail::SpamAssassin::Plugin::dbg("BOGOFILTER: message was sent to: $to");
$self->createUserDir($to);
my $msg = $opts->{permsgstatus}->get_message();
my $fulltext = $msg->get_pristine();
my $tmpfile = $opts->{permsgstatus}->create_fulltext_tmpfile($fulltext);
Mail::SpamAssassin::Plugin::dbg("BOGOFILTER: outut to $tmpfile");
my $bogofilterargs = "-d /var/lib/bogofilter/$to ";
if ($isspam) {
$bogofilterargs .= "-s";
}
else {
$bogofilterargs .= "-n";
}
my $command = "bogofilter $bogofilterargs < $tmpfile";
Mail::SpamAssassin::Plugin::dbg("BOGOFILTER: would run $command");
system $command;
$opts->{permsgstatus}->delete_fulltext_tmpfile();
}
1;
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