small-hacks/remove-spam-high-confidence-maildir.plx

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#!/usr/bin/perl
# Copyright (C) 2010, Bradley M. Kuhn
#
# This program gives you software freedom; you can copy, modify, convey,
# and/or redistribute it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3 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 in a file called 'GPLv3'. If not, write to the:
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor
# Boston, MA 02110-1301, USA.
use strict;
use warnings;
use Mail::Header;
#use File::Copy;
if (@ARGV < 3) {
print STDERR "usage: $0 <MAILDIR_DIRECTORY> <DSPAM_PROBABILITY_MIN> <DSPAM_CONFIDENCE_LEVEL_MIN>\n";
exit 1;
}
my($MAILDIR_FOLDER, $DSPAM_PROB_MIN, $DSPAM_CONF_MIN) = @ARGV;
my($total, $countDeleted) = (0, 0);
my @msgDirs = ("$MAILDIR_FOLDER/cur", "$MAILDIR_FOLDER/new");
foreach my $dir (@msgDirs) {
die "$MAILDIR_FOLDER must not be a maildir folder (or is unreadable by you), since $dir isn't a readable directory: $!"
unless (-d $dir);
}
foreach my $dir (@msgDirs) {
opendir(MAILDIR, $dir) or die "Unable to open directory $dir for reading: $!";
while (my $file = readdir MAILDIR) {
next if -d $file; # skip directories
my $existing_file = "$dir/$file";
open(MAIL_MESSAGE, "<", $existing_file) or
die "unable to open $existing_file for reading: $!";
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my $header = new Mail::Header(\*MAIL_MESSAGE);
my $fields = $header->header_hashref;
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my %dspamVal;
foreach my $val ('Confidence', 'Probability') {
foreach my $dv (@{$fields{"X-DSPAM-$val"}}) {
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if (not defined $dspamVal{$val}) {
$dspamVal{$val} = $dv;
} else {
$dspamVal = $dv if $dv < $dspamVal{$val};
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}
}
if (not defined $dspamVal{$val}) {
print STDERR "File $file has no X-DSPAM-$val header. Skipping.\n";
next;
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}
}
$total++;
if ($dspamVal{Confidence} >= $DSPAM_PROB_MIN and
$dspamVal{Probability} >= $DSPAM_CONF_MIN) {
$countDeleted++;
}
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close MAIL_MESSAGE;
}
close MAILDIR;
}
print "$countDeleted of $total would be deleted\n";
###############################################################################
#
# Local variables:
# compile-command: "perl -c remove-spam-high-confidence-maildir.plx"
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# End: