dspam: fixes for training dspam
process_backticks now writes the entire message (headers + body) to a temp file and had dspam read that. Previously, dspam only read the body. With the new "process, then train on error" method, dspam didn't have access to the DSPAM signature (in the headers). replaced open2 with open3. Same results. Works part of the time, but not consistent, and I haven't been able to figure out why. dspam transaction note is now a hashref (was a string) parsing of dspam response via substring (was regexp)
This commit is contained in:
Matt Simerson
parent
39b1668dda
commit
60470d20a4
148
plugins/dspam
148
plugins/dspam
@ -235,10 +235,12 @@ sub data_post_handler {
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my $response = $self->dspam_process( $filtercmd, $transaction );
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if ( ! $response->{result} ) {
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$self->log(LOGWARN, "skip, no dspam response. Check logs for errors.");
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$self->log(LOGWARN, "error, no dspam response. Check logs for errors.");
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return (DECLINED);
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};
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$transaction->notes('dspam', $response);
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$self->attach_headers( $response, $transaction );
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$self->autolearn( $response, $transaction );
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@ -264,37 +266,78 @@ sub select_username {
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sub assemble_message {
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my ($self, $transaction) = @_;
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$transaction->body_resetpos;
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my $message = "X-Envelope-From: "
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. $transaction->sender->format . "\n"
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. $transaction->header->as_string . "\n\n";
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$transaction->body_resetpos;
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while (my $line = $transaction->body_getline) { $message .= $line; };
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$message = join(CRLF, split/\n/, $message);
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return $message . CRLF;
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};
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sub parse_response {
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my $self = shift;
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my $response = shift or do {
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$self->log( LOGDEBUG, "missing dspam response!" );
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return;
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};
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# example DSPAM results:
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# user@example.com; result="Spam"; class="Spam"; probability=1.0000; confidence=1.00; signature=N/A
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# smtpd; result="Innocent"; class="Innocent"; probability=0.0023; confidence=1.00; signature=4f8dae6a446008399211546
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#return $self->parse_response_regexp( $response ); # probably slower
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my ($user, $result, $class, $prob, $conf, $sig) = split '; ', $response;
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(undef, $result) = split '=', $result;
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(undef, $class ) = split '=', $class;
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(undef, $prob ) = split '=', $prob;
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(undef, $conf ) = split '=', $conf;
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(undef, $sig ) = split '=', $sig;
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$result = substr($result, 1, -1); # strip off quotes
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$class = substr($class, 1, -1);
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return {
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class => $class,
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result => $result,
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probability => $prob,
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confidence => $conf,
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signature => $sig,
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};
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};
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sub parse_response_regexp {
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my ($self, $response) = @_;
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my ($result, $class, $prob, $conf, $sig) = $response =~ /
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result=\"(Spam|Innocent)\";\s
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class=\"(Spam|Innocent)\";\s
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probability=([\d\.]+);\s
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confidence=([\d\.]+);\s
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signature=(.*)
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/x;
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return {
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class => $class,
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result => $result,
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probability => $prob,
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confidence => $conf,
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signature => $sig,
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};
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};
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sub dspam_process {
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my ( $self, $filtercmd, $transaction ) = @_;
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my $dspam_response = $self->dspam_process_backticks( $filtercmd );
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#my $dspam_response = $self->dspam_process_open2( $filtercmd, $transaction );
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#my $dspam_response = $self->dspam_process_fork( $filtercmd );
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my $response = $self->dspam_process_backticks( $filtercmd );
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#my $response = $self->dspam_process_open2( $filtercmd, $transaction );
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#my $response = $self->dspam_process_fork( $filtercmd );
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# X-DSPAM-Result: user@example.com; result="Spam"; class="Spam"; probability=1.0000; confidence=1.00; signature=N/A
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# X-DSPAM-Result: smtpd; result="Innocent"; class="Innocent"; probability=0.0023; confidence=1.00; signature=4f8dae6a446008399211546
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my ($r, $p, $c, $s)
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= $dspam_response
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=~ /result=\"(Spam|Innocent)\";.*?probability=([\d\.]+); confidence=([\d\.]+); signature=(.*)/;
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return {
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result => $r,
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probability => $p,
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confidence => $c,
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signature => $s,
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};
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return $self->parse_response( $response );
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};
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sub dspam_process_fork {
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@ -322,10 +365,22 @@ sub dspam_process_fork {
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sub dspam_process_backticks {
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my ( $self, $filtercmd ) = @_;
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my $filename = $self->qp->transaction->body_filename;
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my $response = `$filtercmd < $filename`; chomp $response;
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$self->log(LOGDEBUG, $response);
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return $response;
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my $transaction = $self->qp->transaction;
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my $message = $self->temp_file();
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open my $fh, '>', $message;
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print $fh "X-Envelope-From: "
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. $transaction->sender->format . CRLF
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. $transaction->header->as_string . CRLF . CRLF;
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$transaction->body_resetpos;
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while (my $line = $transaction->body_getline) { print $fh $line; };
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close $fh;
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my ($line1) = split /[\r|\n]/, `$filtercmd < $message`;
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$self->log(LOGDEBUG, $line1);
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return $line1;
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};
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sub dspam_process_open2 {
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@ -336,16 +391,25 @@ sub dspam_process_open2 {
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# not sure why, but this is not as reliable as I'd like. What's a dspam
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# error -5 mean anyway?
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use FileHandle;
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use IPC::Open2;
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my ($dspam_in, $dspam_out);
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my $pid = open2($dspam_out, $dspam_in, $filtercmd);
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print $dspam_in $message;
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close $dspam_in;
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use IPC::Open3;
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my ($read, $write, $err);
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use Symbol 'gensym'; $err = gensym;
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my $pid = open3($write, $read, $err, $filtercmd);
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print $write $message;
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close $write;
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#my $response = join('', <$dspam_out>); # get full response
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my $response = <$dspam_out>; # get first line only
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my $response = <$read>; # get first line only
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waitpid $pid, 0;
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my $child_exit_status = $? >> 8;
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#$self->log(LOGINFO, "exit status: $child_exit_status");
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if ( $response ) {
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chomp $response;
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$self->log(LOGDEBUG, $response);
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};
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my $err_msg = <$err>;
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if ( $err_msg ) {
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$self->log(LOGDEBUG, $err_msg );
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};
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return $response;
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};
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@ -367,7 +431,7 @@ sub log_and_return {
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};
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if ( $reject eq 'agree' ) {
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return $self->reject_agree( $transaction, $d );
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return $self->reject_agree( $transaction );
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};
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if ( $d->{class} eq 'Innocent' ) {
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@ -394,9 +458,10 @@ sub log_and_return {
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}
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sub reject_agree {
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my ($self, $transaction, $d ) = @_;
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my ($self, $transaction ) = @_;
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my $sa = $transaction->notes('spamassassin' );
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my $d = $transaction->notes('dspam' );
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my $status = "$d->{class}, $d->{confidence} c";
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@ -423,13 +488,14 @@ sub reject_agree {
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if ( $sa->{is_spam} eq 'No' ) {
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if ( $d->{confidence} > .9 ) {
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if ( defined $self->connection->notes('karma') ) {
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$self->connection->notes('karma', $self->connection->notes('karma') + 2);
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$self->connection->notes('karma', ( $self->connection->notes('karma') + 2) );
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};
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};
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$self->log(LOGINFO, "pass, agree, $status");
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return DECLINED;
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};
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$self->log(LOGINFO, "pass, disagree, $status");
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return DECLINED;
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};
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$self->log(LOGINFO, "pass, other $status");
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@ -489,7 +555,13 @@ sub train_error_as_ham {
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my $user = $self->select_username( $transaction );
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my $dspam_bin = $self->{_args}{dspam_bin} || '/usr/local/bin/dspam';
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my $cmd = "$dspam_bin --user $user --mode=toe --source=error --class=innocent --deliver=summary --stdout";
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$self->dspam_process( $cmd, $transaction );
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my $response = $self->dspam_process( $cmd, $transaction );
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if ( $response ) {
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$transaction->notes('dspam', $response);
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}
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else {
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$transaction->notes('dspam', { class => 'Innocent', result => 'Innocent', confidence=>1 } );
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};
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};
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sub train_error_as_spam {
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@ -499,7 +571,13 @@ sub train_error_as_spam {
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my $user = $self->select_username( $transaction );
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my $dspam_bin = $self->{_args}{dspam_bin} || '/usr/local/bin/dspam';
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my $cmd = "$dspam_bin --user $user --mode=toe --source=error --class=spam --deliver=summary --stdout";
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$self->dspam_process( $cmd, $transaction );
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my $response = $self->dspam_process( $cmd, $transaction );
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if ( $response ) {
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$transaction->notes('dspam', $response);
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}
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else {
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$transaction->notes('dspam', { class => 'Spam', result => 'Spam', confidence=>1 } );
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};
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};
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sub autolearn {
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@ -572,12 +650,12 @@ sub autolearn_spamassassin {
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};
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if ( $sa->{is_spam} eq 'Yes' && $sa->{autolearn} eq 'spam' && $response->{result} eq 'Innocent' ) {
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$self->log(LOGINFO, "training spamassassin FN as spam");
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$self->log(LOGINFO, "training SA FN as spam");
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$self->train_error_as_spam( $transaction );
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return 1;
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}
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elsif ( $sa->{is_spam} eq 'No' && $sa->{autolearn} eq 'ham' && $response->{result} eq 'Spam' ) {
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$self->log(LOGINFO, "training spamassassin FP as ham");
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$self->log(LOGINFO, "training SA FP as ham");
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$self->train_error_as_ham( $transaction );
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return 1;
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};
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