qpsmtpd/plugins/content_log

#!perl -w

=head1 NAME

content_log - record incoming mail to a file

=head1 DESCRIPTION

A simple example of a plugin that logs all incoming mail to a file.
Useful for debugging other plugins or keeping an archive of things.

=head1 CONFIG

=head2 content_log_enabled <true|false>

Used to enable and disable content logging

Default: true

=head2 content_log_file <pattern>

Path to the content log file.

This option is passed through strftime(); see
http://man7.org/linux/man-pages/man3/strftime.3.html
or the appropriate documentation for your operating system)

Default: mail/%Y%m%d
=cut

use POSIX qw:strftime:;

sub register {
    my ( $self ) = @_;
    return if ! $self->content_log_enabled;
    $self->register_hook('data_post', 'data_post_handler');
}

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

    return DECLINED, 'excluded from content logging'
        if $self->exclude();

    open my $out, '>>',  $self->content_log_file
      or return DECLINED, "Could not open log file.. continuing anyway";

    $transaction->header->print($out);
    $transaction->body_resetpos;
    while (my $line = $transaction->body_getline) {
        print $out $line;
    }

    close $out;

    return DECLINED, "successfully saved message.. continuing";
}

sub content_log_file {
    my ( $self ) = @_;
    # as a decent default, log on a per-day-basis
    my $path = $self->qp->config('content_log_file');
    $path ||= 'mail/%Y%m%d';
    return strftime($path, localtime(time));
}

sub content_log_enabled {
    my ( $self ) = @_;
    my $enabled = $self->qp->config('content_log_enabled');
    $enabled = 'true' if ! defined $enabled;
    return 1 if $enabled =~ /^(?:true|1|yes)\s*$/i;
    return 0;
}

sub exclude {
    # override this method to exclude some messages from content logging
    return 0;
}