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561 lines
20 KiB
Perl
561 lines
20 KiB
Perl
#!/usr/bin/perl -w
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#
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# Virtual Vacation 4.0
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# $Revision$
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# Originally by Mischa Peters <mischa at high5 dot net>
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#
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# Copyright (c) 2002 - 2005 High5!
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# Licensed under GPL for more info check GPL-LICENSE.TXT
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#
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# Additions:
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# 2004/07/13 David Osborn <ossdev at daocon.com>
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# strict, processes domain level aliases, more
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# subroutines, send reply from original to address
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#
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# 2004/11/09 David Osborn <ossdev at daocon.com>
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# Added syslog support
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# Slightly better logging which includes messageid
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# Avoid infinite loops with domain aliases
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#
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# 2005-01-19 Troels Arvin <troels@arvin.dk>
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# PostgreSQL-version.
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# Normalized DB schema from one vacation table ("vacation")
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# to two ("vacation", "vacation_notification"). Uses
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# referential integrity CASCADE action to simplify cleanup
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# when a user is no longer on vacation.
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# Inserting variables into queries stricly by prepare()
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# to try to avoid SQL injection.
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# International characters are now handled well.
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#
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# 2005-01-21 Troels Arvin <troels@arvin.dk>
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# Uses the Email::Valid package to avoid sending notices
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# to obviously invalid addresses.
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#
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# 2007-08-15 David Goodwin <david@palepurple.co.uk>
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# Use the Perl Mail::Sendmail module for sending mail
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# Check for headers that start with blank lines (patch from forum)
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#
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# 2007-08-20 Martin Ambroz <amsys@trustica.cz>
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# Added initial Unicode support
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#
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# 2008-05-09 Fabio Bonelli <fabiobonelli@libero.it>
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# Properly handle failed queries to vacation_notification.
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# Fixed log reporting.
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#
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# 2008-07-29 Patch from Luxten to add repeat notification after timeout. See:
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# https://sourceforge.net/tracker/index.php?func=detail&aid=2031631&group_id=191583&atid=937966
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#
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# 2008-08-01 Luigi Iotti <luigi at iotti dot biz>
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# Use envelope sender/recipient instead of using
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# From: and To: header fields;
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# Support to good vacation behavior as in
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# http://www.irbs.net/internet/postfix/0707/0954.html
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# (needs to be tested);
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#
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# 2008-08-04 David Goodwin <david at palepurple dot co dot uk>
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# Use Log4Perl
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# Added better testing (and -t option)
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#
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# Requirements - the following perl modules are required:
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# DBD::Pg or DBD::mysql
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# Mail::Sendmail, Email::Valid MIME::Charset, Log::Log4perl, Log::Dispatch, MIME::EncWords and GetOpt::Std
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#
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# You may install these via CPAN, or through your package tool.
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# CPAN: 'perl -MCPAN -e shell', then 'install Module::Whatever'
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#
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# On Debian based systems :
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# libmail-sendmail-perl
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# libdbd-pg-perl
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# libemail-valid-perl
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# libmime-perl
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# liblog-log4perl-perl
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# liblog-dispatch-perl
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# libgetopt-argvfile-perl
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# libmime-charset-perl (currently in testing, see instructions below)
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# libmime-encwords-perl (currently in testing, see instructions below)
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#
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# Note: When you use this module, you may start seeing error messages
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# like "Cannot insert a duplicate key into unique index
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# vacation_notification_pkey" in your system logs. This is expected
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# behavior, and not an indication of trouble (see the "already_notified"
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# subroutine for an explanation).
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#
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# You must also have the Email::Valid and MIME-tools perl-packages
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# installed. They are available in some package collections, under the
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# names 'perl-Email-Valid' and 'perl-MIME-tools', respectively.
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# One such package collection (for Linux) is:
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# http://dag.wieers.com/home-made/apt/packages.php
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#
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# ========== begin configuration ==========
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# IMPORTANT: If you put passwords into this script, then remember
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# to restrict access to the script, so that only the vacation user
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# can read it.
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# db_type - uncomment one of these
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our $db_type = 'Pg';
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#my $db_type = 'mysql';
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# leave empty for connection via UNIX socket
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our $db_host = '';
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# connection details
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our $db_username = 'dg';
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our $db_password = 'gingerdog';
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our $db_name = 'postfix';
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our $vacation_domain = 'autoreply.example.org';
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# smtp server used to send vacation e-mails
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our $smtp_server = 'localhost';
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# Set to 1 to enable logging to syslog.
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our $syslog = 0;
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# path to logfile, when empty logging is supressed
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# change to e.g. /dev/null if you want nothing logged.
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# if we can't write to this, we try /tmp/vacation.log instead
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our $logfile='/var/spool/vacation/vacation.log';
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# 2 = debug + info, 1 = info only, 0 = error only
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our $log_level = 2;
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# notification interval, in seconds
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# set to 0 to notify only once
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# e.g. 1 day ...
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#my $interval = 60*60*24;
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# disabled by default
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our $interval = 0;
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# instead of changing this script, you can put your settings to /etc/mail/postfixadmin/vacation.conf
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# just use perl syntax there to fill the variables listed above (without the "our" keyword). Example:
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# $db_username = 'mail';
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if (-f "/etc/mail/postfixadmin/vacation.conf") {
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require "/etc/mail/postfixadmin/vacation.conf";
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}
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# =========== end configuration ===========
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if ( ! -w $logfile ) {
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$logfile = "/tmp/vacation.log";
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}
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use DBI;
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use MIME::Base64;
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use MIME::EncWords qw(:all);
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use Email::Valid;
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use strict;
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use Mail::Sendmail;
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use Getopt::Std;
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use Log::Log4perl qw(get_logger :levels);
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my ($from, $to, $cc, $replyto , $subject, $messageid, $lastheader, $smtp_sender, $smtp_recipient, %opts, $spam, $test_mode, $logger);
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$subject='';
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$messageid='unknown';
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# Setup a logger...
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#
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getopts('f:t:', \%opts) or die "Usage: $0 [-t yes] -f sender -- recipient\n -t for testing only\n";
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$opts{f} and $smtp_sender = $opts{f} or die "-f sender not present on command line";
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$test_mode = 0;
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$opts{t} and $test_mode = 1;
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$smtp_recipient = shift or die "recipient not given on command line";
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my $log_layout = Log::Log4perl::Layout::PatternLayout->new("%d %p> %F:%L %M - %m%n");
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if($test_mode == 1) {
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$logger = get_logger();
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# log to stdout
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my $appender = Log::Log4perl::Appender->new('Log::Dispatch::Screen');
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$appender->layout($log_layout);
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$logger->add_appender($appender);
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$logger->debug("Test mode enabled");
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}
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else {
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# log to file.
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my $appender = Log::Log4perl::Appender->new(
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'Log::Dispatch::File',
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filename => $logfile,
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mode => 'append');
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$logger = get_logger();
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$appender->layout($log_layout);
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$logger->add_appender($appender);
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if($syslog == 1) {
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my $syslog_appender = Log::Log4perl::Appender->new(
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'Log::Dispatch::Syslog',
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Facility => 'user',
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);
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$logger->add_appender($syslog_appender);
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}
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}
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# change to $DEBUG, $INFO or $ERROR depending on how much logging you want.
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$logger->level($ERROR);
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if($log_level == 1) {
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$logger->level($INFO);
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}
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if($log_level == 2) {
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$logger->level($DEBUG);
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}
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binmode (STDIN,':utf8');
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my $dbh;
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if ($db_host) {
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$dbh = DBI->connect("DBI:$db_type:dbname=$db_name;host=$db_host","$db_username", "$db_password", { RaiseError => 1 });
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} else {
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$dbh = DBI->connect("DBI:$db_type:dbname=$db_name","$db_username", "$db_password", { RaiseError => 1 });
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}
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if (!$dbh) {
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$logger->error("Could not connect to database"); # eval { } etc better here?
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exit(0);
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}
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my $db_true; # MySQL and PgSQL use different values for TRUE, and unicode support...
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if ($db_type eq "mysql") {
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$dbh->do("SET CHARACTER SET utf8;");
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$db_true = '1';
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} else { # Pg
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$dbh->do("SET CLIENT_ENCODING TO 'UTF8'");
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$db_true = 'True';
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}
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# used to detect infinite address lookup loops
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my $loopcount=0;
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sub already_notified {
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my ($to, $from) = @_;
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my $logger = get_logger();
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my $query = qq{INSERT into vacation_notification (on_vacation,notified) values (?,?)};
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my $stm = $dbh->prepare($query);
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if (!$stm) {
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$logger->error("Could not prepare query '$query' to: $to, from:$from");
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return 1;
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}
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$stm->{'PrintError'} = 0;
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$stm->{'RaiseError'} = 0;
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if (!$stm->execute($to,$from)) {
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my $e=$dbh->errstr;
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# Violation of a primay key constraint may happen here, and that's
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# fine. All other error conditions are not fine, however.
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if ($e !~ /(?:_pkey|^Duplicate entry)/) {
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$logger->error("Failed to insert into vacation_notification table (to:$to from:$from error:'$e' query:'$query')");
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# Let's play safe and notify anyway
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return 1;
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}
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if ($interval) {
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$query = qq{SELECT NOW()-notified_at FROM vacation_notification WHERE on_vacation=? AND notified=?};
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$stm = $dbh->prepare($query) or panic_prepare($query);
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$stm->execute($to,$from) or panic_execute($query,"on_vacation='$to', notified='$from'");
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my @row = $stm->fetchrow_array;
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my $int = $row[0];
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if ($int > $interval) {
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$logger->debug("[Interval elapsed, sending the message]: From: $from To:$to");
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$query = qq{UPDATE vacation_notification SET notified_at=NOW() WHERE on_vacation=? AND notified=?};
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$stm = $dbh->prepare($query);
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if (!$stm) {
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$logger->error("Could not prepare query '$query' (to: '$to', from: '$from')");
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return 0;
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}
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if (!$stm->execute($to,$from)) {
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$e=$dbh->errstr;
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$logger->error("Error from running query '$query' (to: '$to', from: '$from', error: '$e')");
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}
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return 0;
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} else {
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$logger->debug("Notification interval not elapsed; not sending vacation reply (to: '$to', from: '$from')");
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return 1;
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}
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} else {
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return 1;
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}
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}
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return 0;
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}
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# try and determine if email address has vacation turned on; we
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# have to do alias searching, and domain aliasing resolution for this.
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# If found, return ($num_matches, $real_email);
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sub find_real_address {
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my ($email) = @_;
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my $logger = get_logger();
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if (++$loopcount > 20) {
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$logger->error("find_real_address loop! (more than 20 attempts!) currently: $email");
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exit(1);
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}
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my $realemail = '';
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my $query = qq{SELECT email FROM vacation WHERE email=? and active=$db_true};
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my $stm = $dbh->prepare($query) or panic_prepare($query);
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$stm->execute($email) or panic_execute($query,"email='$email'");
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my $rv = $stm->rows;
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# Recipient has vacation
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if ($rv == 1) {
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$realemail = $email;
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$logger->debug("Found $email has vacation active");
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} else {
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# XXX why aren't we doing a join here?
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$logger->debug("Looking for alias records that $email resolves to with vacation turned on");
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$query = qq{SELECT goto FROM alias WHERE address=?};
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$stm = $dbh->prepare($query) or panic_prepare($query);
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$stm->execute($email) or panic_execute($query,"address='$email'");
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$rv = $stm->rows;
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# Recipient is an alias, check if mailbox has vacation
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if ($rv == 1) {
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my @row = $stm->fetchrow_array;
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my $alias = $row[0];
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$query = qq{SELECT email FROM vacation WHERE email=? and active=$db_true};
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$stm = $dbh->prepare($query) or panic_prepare($query);
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$stm->execute($alias) or panic_prepare($query,"email='$alias'");
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$rv = $stm->rows;
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# Alias has vacation
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if ($rv == 1) {
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$realemail = $alias;
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}
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# We still have to look for domain level aliases...
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} else {
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my ($user, $domain) = split(/@/, $email);
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$query = qq{SELECT goto FROM alias WHERE address=?};
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$stm = $dbh->prepare($query) or panic_prepare($query);
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$stm->execute("\@$domain") or panic_execute($query,"address='\@$domain'");
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$rv = $stm->rows;
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$logger->debug("Looking for domain level aliases for $domain / $email / $user");
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# The receipient has a domain level alias
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if ($rv == 1) {
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my @row = $stm->fetchrow_array;
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my $wildcard_dest = $row[0];
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my ($wilduser, $wilddomain) = split(/@/, $wildcard_dest);
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# Check domain alias
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if ($wilduser) {
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($rv, $realemail) = find_real_address ($wildcard_dest);
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} else {
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my $new_email = $user . '@' . $wilddomain;
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($rv, $realemail) = find_real_address ($new_email);
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}
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}
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else {
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$logger->debug("No domain level alias present for $domain / $email / $user");
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}
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}
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}
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return ($rv, $realemail);
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}
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# sends the vacation mail to the original sender.
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#
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sub send_vacation_email {
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my ($email, $orig_from, $orig_to, $orig_messageid, $test_mode) = @_;
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my $logger = get_logger();
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$logger->debug("Asked to send vacation reply to $email thanks to $orig_messageid");
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my $query = qq{SELECT subject,body FROM vacation WHERE email=?};
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my $stm = $dbh->prepare($query) or panic_prepare($query);
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$stm->execute($email) or panic_execute($query,"email='$email'");
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my $rv = $stm->rows;
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if ($rv == 1) {
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my @row = $stm->fetchrow_array;
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if (already_notified($email, $orig_from) == 1) {
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$logger->debug("Already notified $email, or some error prevented us from doing so");
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return;
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}
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$logger->debug("Will send vacation response for $orig_messageid: FROM: $email (orig_to: $orig_to), TO: $orig_from; VACATION SUBJECT: $row[0] ; VACATION BODY: $row[1]");
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my $subject = $row[0];
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my $body = $row[1];
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my $from = $email;
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my $to = $orig_from;
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my $vacation_subject = encode_mimewords($subject, 'Encoding'=> 'q', 'Charset'=>'utf-8', 'Field'=>'Subject');
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my %mail;
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%mail = (
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'smtp' => $smtp_server,
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'Subject' => $vacation_subject,
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'From' => $from,
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'To' => $to,
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'MIME-Version' => '1.0',
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'Content-Type' => 'text/plain; charset=UTF-8',
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'Content-Transfer-Encoding' => 'base64',
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'Precedence' => 'junk',
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'X-Loop' => 'Postfix Admin Virtual Vacation',
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'Message' => encode_base64($body)
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);
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if($test_mode == 1) {
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$logger->info("** TEST MODE ** : Vacation response sent to $to from $from subject $subject (not) sent\n");
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$logger->info(%mail);
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return 0;
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}
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sendmail(%mail) or $logger->error("Failed to send vacation response: " . $Mail::Sendmail::error);
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$logger->debug("Vacation response sent, Mail::Sendmail said : " . $Mail::Sendmail::log);
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}
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}
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# Remove textual stuff from a (list of) email address(es)
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# e.g. convert: "aardvark" <a@b.com>, "Danger Mouse" <c@d.com>, e@f.com to
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# a@b.com, c@d.com, e@f.com
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sub strip_address {
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my ($arg) = @_;
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if(!$arg) {
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return '';
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}
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my @ok;
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$logger = get_logger();
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my @list;
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@list = $arg =~ m/([\w\.\-\']+\@[\w\.\-]+\w+)/g;
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foreach(@list) {
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#$logger->debug("Checking: $_");
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my $temp = Email::Valid->address( -address => $_, -mxcheck => 0);
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if($temp) {
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push(@ok, $temp);
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}
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else {
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$logger->debug("Email not valid : $Email::Valid::Details");
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}
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}
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# remove duplicates
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my %seen = ();
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my @uniq;
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my $item;
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foreach $item (@ok) {
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push(@uniq, $item) unless $seen{$item}++
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}
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my $result = join(", ", @uniq);
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#$logger->debug("Result: $result");
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return $result;
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}
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sub panic_prepare {
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my ($arg) = @_;
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my $logger = get_logger();
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$logger->error("Could not prepare sql statement: '$arg'");
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exit(0);
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}
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sub panic_execute {
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my ($arg,$param) = @_;
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my $logger = get_logger();
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$logger->error("Could not execute sql statement - '$arg' with parameters '$param'");
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exit(0);
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}
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# Make sure the email wasn't sent by someone who could be a mailing list etc; if it was,
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# then we abort after appropriate logging.
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sub check_and_clean_from_address {
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my ($address) = @_;
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my $logger = get_logger();
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if($address =~ /^(noreply|postmaster|mailer-daemon|listserv|majordomo|owner-|request-|bounces-)/i ||
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$address =~ /-(owner|request|bounces)\@/i ) {
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$logger->debug("sender $address contains $1 - will not send vacation message");
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exit(0);
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}
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$address = strip_address($address);
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if($address eq "") {
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$logger->error("Address $address is not valid; exiting");
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exit(0);
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|
}
|
|
#$logger->debug("Address cleaned up to $address");
|
|
return $address;
|
|
}
|
|
########################### main #################################
|
|
|
|
# Take headers apart
|
|
$cc = '';
|
|
$replyto = '';
|
|
|
|
$logger->debug("Script argument SMTP recipient is : '$smtp_recipient' and smtp_sender : '$smtp_sender'");
|
|
while (<STDIN>) {
|
|
last if (/^$/);
|
|
if (/^\s+(.*)/ and $lastheader) { $$lastheader .= " $1"; next; }
|
|
elsif (/^from:\s*(.*)\n$/i) { $from = $1; $lastheader = \$from; }
|
|
elsif (/^to:\s*(.*)\n$/i) { $to = $1; $lastheader = \$to; }
|
|
elsif (/^cc:\s*(.*)\n$/i) { $cc = $1; $lastheader = \$cc; }
|
|
elsif (/^Reply-to:\s*(.*)\s*\n$/i) { $replyto = $1; $lastheader = \$replyto; }
|
|
elsif (/^subject:\s*(.*)\n$/i) { $subject = $1; $lastheader = \$subject; }
|
|
elsif (/^message-id:\s*(.*)\s*\n$/i) { $messageid = $1; $lastheader = \$messageid; }
|
|
elsif (/^x-spam-(flag|status):\s+yes/i) { $logger->debug("x-spam-$1: yes found; exiting"); exit (0); }
|
|
elsif (/^x-facebook-notify:/i) { $logger->debug('Mail from facebook, ignoring'); exit(0); }
|
|
elsif (/^precedence:\s+(bulk|list|junk)/i) { $logger->debug("precedence: $1 found; exiting"); exit (0); }
|
|
elsif (/^x-loop:\s+postfix\ admin\ virtual\ vacation/i) { $logger->debug("x-loop: postfix admin virtual vacation found; exiting"); exit (0); }
|
|
elsif (/^Auto-Submitted:\s*no/i) { next; }
|
|
elsif (/^Auto-Submitted:/i) { $logger->debug("Auto-Submitted: something found; exiting"); exit (0); }
|
|
elsif (/^List-(Id|Post):/i) { $logger->debug("List-$1: found; exiting"); exit (0); }
|
|
else {$lastheader = "" ; }
|
|
}
|
|
|
|
|
|
if($smtp_recipient =~ /\@$vacation_domain/) {
|
|
# the regexp used here could probably be improved somewhat, for now hope that people won't use # as a valid mailbox character.
|
|
my $tmp = $smtp_recipient;
|
|
$tmp =~ s/\@$vacation_domain//;
|
|
$tmp =~ s/#/\@/;
|
|
$logger->debug("Converted autoreply mailbox back to normal style - from $smtp_recipient to $tmp");
|
|
$smtp_recipient = $tmp;
|
|
undef $tmp;
|
|
}
|
|
|
|
|
|
# If either From: or To: are not set, exit
|
|
if(!$from || !$to || !$messageid || !$smtp_sender || !$smtp_recipient) {
|
|
$logger->info("One of from=$from, to=$to, messageid=$messageid, smtp sender=$smtp_sender, smtp recipient=$smtp_recipient empty");
|
|
exit(0);
|
|
}
|
|
$logger->debug("Email headers have to: '$to' and From: '$from'");
|
|
$to = strip_address($to);
|
|
$from = lc ($from);
|
|
$from = check_and_clean_from_address($from);
|
|
if($replyto ne "") {
|
|
# if reply-to is invalid, or looks like a mailing list, then we probably don't want to send a reply.
|
|
$replyto = check_and_clean_from_address($replyto);
|
|
}
|
|
$smtp_sender = check_and_clean_from_address($smtp_sender);
|
|
$smtp_recipient = check_and_clean_from_address($smtp_recipient);
|
|
|
|
|
|
if ($smtp_sender eq $smtp_recipient) {
|
|
$logger->debug("smtp sender $smtp_sender and recipient $smtp_recipient are the same; aborting");
|
|
exit(0);
|
|
}
|
|
|
|
my $recipfound = 0;
|
|
for (split(/,\s*/, lc($to)), split(/,\s*/, lc($cc))) {
|
|
my $destinatario = strip_address($_);
|
|
if ($smtp_sender eq $destinatario) {
|
|
$logger->debug("sender header $smtp_sender contains recipient $destinatario (mailing myself?)");
|
|
exit(0);
|
|
}
|
|
if ($smtp_recipient eq $destinatario) { $recipfound++; }
|
|
}
|
|
if (!$recipfound) {
|
|
$logger->debug("smtp envelope recipient $smtp_recipient not found in the header recipients ($to & $cc) (therefore they were bcc'ed, so won't send vacation message)");
|
|
exit (0);
|
|
}
|
|
|
|
|
|
|
|
my ($rv, $email) = find_real_address($smtp_recipient);
|
|
if ($rv == 1) {
|
|
$logger->debug("Attempting to send vacation response for: $messageid to: $smtp_sender, $smtp_recipient, $email (test_mode = $test_mode)");
|
|
send_vacation_email($email, $smtp_sender, $smtp_recipient, $messageid, $test_mode);
|
|
}
|
|
else {
|
|
$logger->debug("SMTP recipient $smtp_recipient which resolves to $email does not have an active vacation (rv: $rv, email: $email)");
|
|
}
|
|
|
|
0;
|
|
|
|
#/* vim: set expandtab softtabstop=3 tabstop=3 shiftwidth=3: */
|