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# $Header: /home/cvs/cvsroot/freeside/rt/lib/RT/Interface/Email.pm,v 1.1 2002-08-12 06:17:08 ivan Exp $
# RT is (c) 1996-2001 Jesse Vincent <jesse@fsck.com>
package RT::Interface::Email;
use strict;
use Mail::Address;
use MIME::Entity;
BEGIN {
use Exporter ();
use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
# set the version for version checking
$VERSION = do { my @r = (q$Revision: 1.1 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; # must be all one line, for MakeMaker
@ISA = qw(Exporter);
# your exported package globals go here,
# as well as any optionally exported functions
@EXPORT_OK = qw(&CleanEnv
&LoadConfig
&DBConnect
&GetCurrentUser
&GetMessageContent
&CheckForLoops
&CheckForSuspiciousSender
&CheckForAutoGenerated
&ParseMIMEEntityFromSTDIN
&ParseTicketId
&MailError
&ParseCcAddressesFromHead
&ParseSenderAddressFromHead
&ParseErrorsToAddressFromHead
&ParseAddressFromHeader
&debug);
}
=head1 NAME
RT::Interface::CLI - helper functions for creating a commandline RT interface
=head1 SYNOPSIS
use lib "!!RT_LIB_PATH!!";
use lib "!!RT_ETC_PATH!!";
use RT::Interface::Email qw(CleanEnv LoadConfig DBConnect
);
#Clean out all the nasties from the environment
CleanEnv();
#Load etc/config.pm and drop privs
LoadConfig();
#Connect to the database and get RT::SystemUser and RT::Nobody loaded
DBConnect();
#Get the current user all loaded
my $CurrentUser = GetCurrentUser();
=head1 DESCRIPTION
=begin testing
ok(require RT::TestHarness);
ok(require RT::Interface::Email);
=end testing
=head1 METHODS
=cut
=head2 CleanEnv
Removes some of the nastiest nasties from the user\'s environment.
=cut
sub CleanEnv {
$ENV{'PATH'} = '/bin:/usr/bin'; # or whatever you need
$ENV{'CDPATH'} = '' if defined $ENV{'CDPATH'};
$ENV{'SHELL'} = '/bin/sh' if defined $ENV{'SHELL'};
$ENV{'ENV'} = '' if defined $ENV{'ENV'};
$ENV{'IFS'} = '' if defined $ENV{'IFS'};
}
=head2 LoadConfig
Loads RT's config file and then drops setgid privileges.
=cut
sub LoadConfig {
#This drags in RT's config.pm
use config;
}
=head2 DBConnect
Calls RT::Init, which creates a database connection and then creates $RT::Nobody
and $RT::SystemUser
=cut
sub DBConnect {
use RT;
RT::Init();
}
# {{{ sub debug
sub debug {
my $val = shift;
my ($debug);
if ($val) {
$RT::Logger->debug($val."\n");
if ($debug) {
print STDERR "$val\n";
}
}
if ($debug) {
return(1);
}
}
# }}}
# {{{ sub CheckForLoops
sub CheckForLoops {
my $head = shift;
#If this instance of RT sent it our, we don't want to take it in
my $RTLoop = $head->get("X-RT-Loop-Prevention") || "";
chomp ($RTLoop); #remove that newline
if ($RTLoop eq "$RT::rtname") {
return (1);
}
# TODO: We might not trap the case where RT instance A sends a mail
# to RT instance B which sends a mail to ...
return (undef);
}
# }}}
# {{{ sub CheckForSuspiciousSender
sub CheckForSuspiciousSender {
my $head = shift;
#if it's from a postmaster or mailer daemon, it's likely a bounce.
#TODO: better algorithms needed here - there is no standards for
#bounces, so it's very difficult to separate them from anything
#else. At the other hand, the Return-To address is only ment to be
#used as an error channel, we might want to put up a separate
#Return-To address which is treated differently.
#TODO: search through the whole email and find the right Ticket ID.
my ($From, $junk) = ParseSenderAddressFromHead($head);
if (($From =~ /^mailer-daemon/i) or
($From =~ /^postmaster/i)){
return (1);
}
return (undef);
}
# }}}
# {{{ sub CheckForAutoGenerated
sub CheckForAutoGenerated {
my $head = shift;
my $Precedence = $head->get("Precedence") || "" ;
if ($Precedence =~ /^(bulk|junk)/i) {
return (1);
}
else {
return (0);
}
}
# }}}
# {{{ sub ParseMIMEEntityFromSTDIN
sub ParseMIMEEntityFromSTDIN {
# Create a new parser object:
my $parser = new MIME::Parser;
# {{{ Config $parser to store large attacments in temp dir
## TODO: Does it make sense storing to disk at all? After all, we
## need to put each msg as an in-core scalar before saving it to
## the database, don't we?
## At the same time, we should make sure that we nuke attachments
## Over max size and return them
## TODO: Remove the temp dir when we don't need it any more.
my $AttachmentDir = File::Temp::tempdir (TMPDIR => 1, CLEANUP => 1);
# Set up output directory for files:
$parser->output_dir("$AttachmentDir");
#If someone includes a message, don't extract it
$parser->extract_nested_messages(0);
# Set up the prefix for files with auto-generated names:
$parser->output_prefix("part");
# If content length is <= 20000 bytes, store each msg as in-core scalar;
# Else, write to a disk file (the default action):
$parser->output_to_core(20000);
# }}} (temporary directory)
#Ok. now that we're set up, let's get the stdin.
my $entity;
unless ($entity = $parser->read(\*STDIN)) {
die "couldn't parse MIME stream";
}
#Now we've got a parsed mime object.
# Get the head, a MIME::Head:
my $head = $entity->head;
# Unfold headers that are have embedded newlines
$head->unfold;
# TODO - information about the charset is lost here!
$head->decode;
return ($entity, $head);
}
# }}}
# {{{ sub ParseTicketId
sub ParseTicketId {
my $Subject = shift;
my ($Id);
if ($Subject =~ s/\[$RT::rtname \#(\d+)\]//i) {
$Id = $1;
$RT::Logger->debug("Found a ticket ID. It's $Id");
return($Id);
}
else {
return(undef);
}
}
# }}}
# {{{ sub MailError
sub MailError {
my %args = (To => $RT::OwnerEmail,
Bcc => undef,
From => $RT::CorrespondAddress,
Subject => 'There has been an error',
Explanation => 'Unexplained error',
MIMEObj => undef,
LogLevel => 'crit',
@_);
$RT::Logger->log(level => $args{'LogLevel'},
message => $args{'Explanation'}
);
my $entity = MIME::Entity->build( Type =>"multipart/mixed",
From => $args{'From'},
Bcc => $args{'Bcc'},
To => $args{'To'},
Subject => $args{'Subject'},
'X-RT-Loop-Prevention' => $RT::rtname,
);
$entity->attach( Data => $args{'Explanation'}."\n");
my $mimeobj = $args{'MIMEObj'};
if ($mimeobj) {
$mimeobj->sync_headers();
$entity->add_part($mimeobj);
}
if ($RT::MailCommand eq 'sendmailpipe') {
open (MAIL, "|$RT::SendmailPath $RT::SendmailArguments") || return(0);
print MAIL $entity->as_string;
close(MAIL);
}
else {
$entity->send($RT::MailCommand, $RT::MailParams);
}
}
# }}}
# {{{ sub GetCurrentUser
sub GetCurrentUser {
my $head = shift;
my $entity = shift;
my $ErrorsTo = shift;
my %UserInfo = ();
#Suck the address of the sender out of the header
my ($Address, $Name) = ParseSenderAddressFromHead($head);
#This will apply local address canonicalization rules
$Address = RT::CanonicalizeAddress($Address);
#If desired, synchronize with an external database
my $UserFoundInExternalDatabase = 0;
# Username is the 'Name' attribute of the user that RT uses for things
# like authentication
my $Username = undef;
if ($RT::LookupSenderInExternalDatabase) {
($UserFoundInExternalDatabase, %UserInfo) =
RT::LookupExternalUserInfo($Address, $Name);
$Address = $UserInfo{'EmailAddress'};
$Username = $UserInfo{'Name'};
}
my $CurrentUser = RT::CurrentUser->new();
# First try looking up by a username, if we got one from the external
# db lookup. Next, try looking up by email address. Failing that,
# try looking up by users who have this user's email address as their
# username.
if ($Username) {
$CurrentUser->LoadByName($Username);
}
unless ($CurrentUser->Id) {
$CurrentUser->LoadByEmail($Address);
}
#If we can't get it by email address, try by name.
unless ($CurrentUser->Id) {
$CurrentUser->LoadByName($Address);
}
unless ($CurrentUser->Id) {
#If we couldn't load a user, determine whether to create a user
# {{{ If we require an incoming address to be found in the external
# user database, reject the incoming message appropriately
if ( $RT::LookupSenderInExternalDatabase &&
$RT::SenderMustExistInExternalDatabase &&
!$UserFoundInExternalDatabase) {
my $Message = "Sender's email address was not found in the user database.";
# {{{ This code useful only if you've defined an AutoRejectRequest template
require RT::Template;
my $template = new RT::Template($RT::Nobody);
$template->Load('AutoRejectRequest');
$Message = $template->Content || $Message;
# }}}
MailError( To => $ErrorsTo,
Subject => "Ticket Creation failed: user could not be created",
Explanation => $Message,
MIMEObj => $entity,
LogLevel => 'notice'
);
return($CurrentUser);
}
# }}}
else {
my $NewUser = RT::User->new($RT::SystemUser);
my ($Val, $Message) =
$NewUser->Create(Name => ($Username || $Address),
EmailAddress => $Address,
RealName => "$Name",
Password => undef,
Privileged => 0,
Comments => 'Autocreated on ticket submission'
);
unless ($Val) {
# Deal with the race condition of two account creations at once
#
if ($Username) {
$NewUser->LoadByName($Username);
}
unless ($NewUser->Id) {
$NewUser->LoadByEmail($Address);
}
unless ($NewUser->Id) {
MailError( To => $ErrorsTo,
Subject => "User could not be created",
Explanation => "User creation failed in mailgateway: $Message",
MIMEObj => $entity,
LogLevel => 'crit'
);
}
}
}
#Load the new user object
$CurrentUser->LoadByEmail($Address);
unless ($CurrentUser->id) {
$RT::Logger->warning("Couldn't load user '$Address'.". "giving up");
MailError( To => $ErrorsTo,
Subject => "User could not be loaded",
Explanation => "User '$Address' could not be loaded in the mail gateway",
MIMEObj => $entity,
LogLevel => 'crit'
);
}
}
return ($CurrentUser);
}
# }}}
# {{{ ParseCcAddressesFromHead
=head2 ParseCcAddressesFromHead HASHREF
Takes a hashref object containing QueueObj, Head and CurrentUser objects.
Returns a list of all email addresses in the To and Cc
headers b<except> the current Queue\'s email addresses, the CurrentUser\'s
email address and anything that the configuration sub RT::IsRTAddress matches.
=cut
sub ParseCcAddressesFromHead {
my %args = ( Head => undef,
QueueObj => undef,
CurrentUser => undef,
@_ );
my (@Addresses);
my @ToObjs = Mail::Address->parse($args{'Head'}->get('To'));
my @CcObjs = Mail::Address->parse($args{'Head'}->get('Cc'));
foreach my $AddrObj (@ToObjs, @CcObjs) {
my $Address = $AddrObj->address;
$Address = RT::CanonicalizeAddress($Address);
next if ($args{'CurrentUser'}->EmailAddress =~ /^$Address$/i);
next if ($args{'QueueObj'}->CorrespondAddress =~ /^$Address$/i);
next if ($args{'QueueObj'}->CommentAddress =~ /^$Address$/i);
next if (RT::IsRTAddress($Address));
push (@Addresses, $Address);
}
return (@Addresses);
}
# }}}
# {{{ ParseSenderAdddressFromHead
=head2 ParseSenderAddressFromHead
Takes a MIME::Header object. Returns a tuple: (user@host, friendly name)
of the From (evaluated in order of Reply-To:, From:, Sender)
=cut
sub ParseSenderAddressFromHead {
my $head = shift;
#Figure out who's sending this message.
my $From = $head->get('Reply-To') ||
$head->get('From') ||
$head->get('Sender');
return (ParseAddressFromHeader($From));
}
# }}}
# {{{ ParseErrorsToAdddressFromHead
=head2 ParseErrorsToAddressFromHead
Takes a MIME::Header object. Return a single value : user@host
of the From (evaluated in order of Errors-To:,Reply-To:, From:, Sender)
=cut
sub ParseErrorsToAddressFromHead {
my $head = shift;
#Figure out who's sending this message.
foreach my $header ('Errors-To' , 'Reply-To', 'From', 'Sender' ) {
# If there's a header of that name
my $headerobj = $head->get($header);
if ($headerobj) {
my ($addr, $name ) = ParseAddressFromHeader($headerobj);
# If it's got actual useful content...
return ($addr) if ($addr);
}
}
}
# }}}
# {{{ ParseAddressFromHeader
=head2 ParseAddressFromHeader ADDRESS
Takes an address from $head->get('Line') and returns a tuple: user@host, friendly name
=cut
sub ParseAddressFromHeader{
my $Addr = shift;
my @Addresses = Mail::Address->parse($Addr);
my $AddrObj = $Addresses[0];
unless (ref($AddrObj)) {
return(undef,undef);
}
my $Name = ($AddrObj->phrase || $AddrObj->comment || $AddrObj->address);
#Lets take the from and load a user object.
my $Address = $AddrObj->address;
return ($Address, $Name);
}
# }}}
1;
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