qpsmtpd/plugins/spamassassin

#
#  Requires the spamd patch attached to this spamassassin bug:
#    http://bugzilla.spamassassin.org/show_bug.cgi?id=660    
#
#  The patch is going to be included in SpamAssassin 2.40.
#
#  ... or you can change REPORT_IFSPAM to REPORT below; but the headers
#      will be a bit different than you are used to.
#
#

use Socket qw(:DEFAULT :crlf);
use IO::Handle;

sub register {
  my ($self, $qp) = @_;
  $self->register_hook("data_post", "check_spam");
}

#my $rv = check_spam();
#die "failure!" unless defined $rv;
#print "rv: $rv\n";

sub check_spam {
  my ($self, $transaction) = @_;

  return (DECLINED) if $transaction->body_size > 500_000;

  my $remote  = 'localhost';
  my $port    = 783;
  if ($port =~ /\D/) { $port = getservbyname($port, 'tcp') }
  die "No port" unless $port;
  my $iaddr   = inet_aton($remote) or 
    $self->log(1, "Could not resolve host: $remote") and return (DECLINED);
  my $paddr   = sockaddr_in($port, $iaddr);
  
  my $proto   = getprotobyname('tcp');
  socket(SPAMD, PF_INET, SOCK_STREAM, $proto)
    or $self->log(1, "Could not open socket: $!") and return (DECLINED);

  connect(SPAMD, $paddr) 
    or $self->log(1, "Could not connect to spamassassin daemon: $!") and return DECLINED;

  SPAMD->autoflush(1);
  
  $transaction->body_resetpos;
  
  print SPAMD "REPORT_IFSPAM SPAMC/1.0" . CRLF;
  # or CHECK or REPORT or SYMBOLS

  print SPAMD join CRLF, split /\n/, $transaction->header->as_string;
  print SPAMD CRLF;

  while (my $line = $transaction->body_getline) {
    chomp $line;
    print SPAMD $line, CRLF;
  }
  print SPAMD CRLF;
  shutdown(SPAMD, 1);
  my $line0 = <SPAMD>; # get the first protocol lines out
  if ($line0) {
    $transaction->header->add("X-Spam-Check-By", $self->qp->config('me'));
  }
  while (<SPAMD>) {
    warn "GOT FROM SPAMD1: $_";
    next unless m/\S/;
    s/\r?\n$/\n/;
    my @h = split /: /, $_, 2;

    $transaction->header->add(@h);
    last if $h[0] eq "Spam" and $h[1] =~ m/^False/;

  }
  return (DECLINED);
}