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+# BEGIN BPS TAGGED BLOCK {{{
+#
+# COPYRIGHT:
+#
+# This software is Copyright (c) 1996-2009 Best Practical Solutions, LLC
+# <jesse@bestpractical.com>
+#
+# (Except where explicitly superseded by other copyright notices)
+#
+#
+# LICENSE:
+#
+# This work is made available to you under the terms of Version 2 of
+# the GNU General Public License. A copy of that license should have
+# been provided with this software, but in any event can be snarfed
+# from www.gnu.org.
+#
+# This work is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 or visit their web page on the internet at
+# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
+#
+#
+# CONTRIBUTION SUBMISSION POLICY:
+#
+# (The following paragraph is not intended to limit the rights granted
+# to you to modify and distribute this software under the terms of
+# the GNU General Public License and is only of importance to you if
+# you choose to contribute your changes and enhancements to the
+# community by submitting them to Best Practical Solutions, LLC.)
+#
+# By intentionally submitting any modifications, corrections or
+# derivatives to this work, or any other work intended for use with
+# Request Tracker, to Best Practical Solutions, LLC, you confirm that
+# you are the copyright holder for those contributions and you grant
+# Best Practical Solutions, LLC a nonexclusive, worldwide, irrevocable,
+# royalty-free, perpetual, license to use, copy, create derivative
+# works based on those contributions, and sublicense and distribute
+# those contributions and any derivatives thereof.
+#
+# END BPS TAGGED BLOCK }}}
+
+package RT::EmailParser;
+
+
+use base qw/RT::Base/;
+
+use strict;
+use warnings;
+
+use Email::Address;
+use MIME::Entity;
+use MIME::Head;
+use MIME::Parser;
+use File::Temp qw/tempdir/;
+
+=head1 NAME
+
+ RT::EmailParser - helper functions for parsing parts from incoming
+ email messages
+
+=head1 SYNOPSIS
+
+
+=head1 DESCRIPTION
+
+
+
+
+=head1 METHODS
+
+=head2 new
+
+Returns a new RT::EmailParser object
+
+=cut
+
+sub new {
+ my $proto = shift;
+ my $class = ref($proto) || $proto;
+ my $self = {};
+ bless ($self, $class);
+ return $self;
+}
+
+
+=head2 SmartParseMIMEEntityFromScalar Message => SCALAR_REF [, Decode => BOOL, Exact => BOOL ] }
+
+Parse a message stored in a scalar from scalar_ref.
+
+=cut
+
+sub SmartParseMIMEEntityFromScalar {
+ my $self = shift;
+ my %args = ( Message => undef, Decode => 1, Exact => 0, @_ );
+
+ eval {
+ my ( $fh, $temp_file );
+ for ( 1 .. 10 ) {
+
+ # on NFS and NTFS, it is possible that tempfile() conflicts
+ # with other processes, causing a race condition. we try to
+ # accommodate this by pausing and retrying.
+ last
+ if ( $fh, $temp_file ) =
+ eval { File::Temp::tempfile( undef, UNLINK => 0 ) };
+ sleep 1;
+ }
+ if ($fh) {
+
+ #thank you, windows
+ binmode $fh;
+ $fh->autoflush(1);
+ print $fh $args{'Message'};
+ close($fh);
+ if ( -f $temp_file ) {
+
+ # We have to trust the temp file's name -- untaint it
+ $temp_file =~ /(.*)/;
+ my $entity = $self->ParseMIMEEntityFromFile( $1, $args{'Decode'}, $args{'Exact'} );
+ unlink($1);
+ return $entity;
+ }
+ }
+ };
+
+ #If for some reason we weren't able to parse the message using a temp file
+ # try it with a scalar
+ if ( $@ || !$self->Entity ) {
+ return $self->ParseMIMEEntityFromScalar( $args{'Message'}, $args{'Decode'}, $args{'Exact'} );
+ }
+
+}
+
+
+=head2 ParseMIMEEntityFromSTDIN
+
+Parse a message from standard input
+
+=cut
+
+sub ParseMIMEEntityFromSTDIN {
+ my $self = shift;
+ return $self->ParseMIMEEntityFromFileHandle(\*STDIN, @_);
+}
+
+=head2 ParseMIMEEntityFromScalar $message
+
+Takes either a scalar or a reference to a scalar which contains a stringified MIME message.
+Parses it.
+
+Returns true if it wins.
+Returns false if it loses.
+
+=cut
+
+sub ParseMIMEEntityFromScalar {
+ my $self = shift;
+ return $self->_ParseMIMEEntity( shift, 'parse_data', @_ );
+}
+
+=head2 ParseMIMEEntityFromFilehandle *FH
+
+Parses a mime entity from a filehandle passed in as an argument
+
+=cut
+
+sub ParseMIMEEntityFromFileHandle {
+ my $self = shift;
+ return $self->_ParseMIMEEntity( shift, 'parse', @_ );
+}
+
+=head2 ParseMIMEEntityFromFile
+
+Parses a mime entity from a filename passed in as an argument
+
+=cut
+
+sub ParseMIMEEntityFromFile {
+ my $self = shift;
+ return $self->_ParseMIMEEntity( shift, 'parse_open', @_ );
+}
+
+
+sub _ParseMIMEEntity {
+ my $self = shift;
+ my $message = shift;
+ my $method = shift;
+ my $postprocess = (@_ ? shift : 1);
+ my $exact = shift;
+
+ # Create a new parser object:
+ my $parser = MIME::Parser->new();
+ $self->_SetupMIMEParser($parser);
+ $parser->decode_bodies(0) if $exact;
+
+ # TODO: XXX 3.0 we really need to wrap this in an eval { }
+ unless ( $self->{'entity'} = $parser->$method($message) ) {
+ $RT::Logger->crit("Couldn't parse MIME stream and extract the submessages");
+ # Try again, this time without extracting nested messages
+ $parser->extract_nested_messages(0);
+ unless ( $self->{'entity'} = $parser->$method($message) ) {
+ $RT::Logger->crit("couldn't parse MIME stream");
+ return ( undef);
+ }
+ }
+
+ $self->_PostProcessNewEntity if $postprocess;
+
+ return $self->{'entity'};
+}
+
+sub _DecodeBodies {
+ my $self = shift;
+ return unless $self->{'entity'};
+
+ my @parts = $self->{'entity'}->parts_DFS;
+ $self->_DecodeBody($_) foreach @parts;
+}
+
+sub _DecodeBody {
+ my $self = shift;
+ my $entity = shift;
+
+ my $old = $entity->bodyhandle or return;
+ return unless $old->is_encoded;
+
+ require MIME::Decoder;
+ my $encoding = $entity->head->mime_encoding;
+ my $decoder = new MIME::Decoder $encoding;
+ unless ( $decoder ) {
+ $RT::Logger->error("Couldn't find decoder for '$encoding', switching to binary");
+ $old->is_encoded(0);
+ return;
+ }
+
+ require MIME::Body;
+ # XXX: use InCore for now, but later must switch to files
+ my $new = new MIME::Body::InCore;
+ $new->binmode(1);
+ $new->is_encoded(0);
+
+ my $source = $old->open('r') or die "couldn't open body: $!";
+ my $destination = $new->open('w') or die "couldn't open body: $!";
+ {
+ local $@;
+ eval { $decoder->decode($source, $destination) };
+ $RT::Logger->error($@) if $@;
+ }
+ $source->close or die "can't close: $!";
+ $destination->close or die "can't close: $!";
+
+ $entity->bodyhandle( $new );
+}
+
+=head2 _PostProcessNewEntity
+
+cleans up and postprocesses a newly parsed MIME Entity
+
+=cut
+
+sub _PostProcessNewEntity {
+ my $self = shift;
+
+ #Now we've got a parsed mime object.
+
+ # Unfold headers that are have embedded newlines
+ # Better do this before conversion or it will break
+ # with multiline encoded Subject (RFC2047) (fsck.com #5594)
+ $self->Head->unfold;
+
+ # try to convert text parts into utf-8 charset
+ RT::I18N::SetMIMEEntityToEncoding($self->{'entity'}, 'utf-8');
+}
+
+=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 RT->Config->Get('RTAddressRegexp') matches.
+
+=cut
+
+sub ParseCcAddressesFromHead {
+ my $self = shift;
+ my %args = (
+ QueueObj => undef,
+ CurrentUser => undef,
+ @_
+ );
+
+ my (@Addresses);
+
+ my @ToObjs = Email::Address->parse( $self->Head->get('To') );
+ my @CcObjs = Email::Address->parse( $self->Head->get('Cc') );
+
+ foreach my $AddrObj ( @ToObjs, @CcObjs ) {
+ my $Address = $AddrObj->address;
+ my $user = RT::User->new($RT::SystemUser);
+ $Address = $user->CanonicalizeEmailAddress($Address);
+ next if lc $args{'CurrentUser'}->EmailAddress eq lc $Address;
+ next if $self->IsRTAddress($Address);
+
+ push ( @Addresses, $Address );
+ }
+ return (@Addresses);
+}
+
+
+=head2 IsRTaddress ADDRESS
+
+Takes a single parameter, an email address.
+Returns true if that address matches the C<RTAddressRegexp> config option.
+Returns false, otherwise.
+
+
+=cut
+
+sub IsRTAddress {
+ my $self = shift;
+ my $address = shift;
+
+ if ( my $address_re = RT->Config->Get('RTAddressRegexp') ) {
+ return $address =~ /$address_re/i ? 1 : undef;
+ }
+
+ # we don't warn here, but do in config check
+ if ( my $correspond_address = RT->Config->Get('CorrespondAddress') ) {
+ return 1 if lc $correspond_address eq lc $address;
+ }
+ if ( my $comment_address = RT->Config->Get('CommentAddress') ) {
+ return 1 if lc $comment_address eq lc $address;
+ }
+
+ my $queue = RT::Queue->new( $RT::SystemUser );
+ $queue->LoadByCols( CorrespondAddress => $address );
+ return 1 if $queue->id;
+
+ $queue->LoadByCols( CommentAddress => $address );
+ return 1 if $queue->id;
+
+ return undef;
+}
+
+
+=head2 CullRTAddresses ARRAY
+
+Takes a single argument, an array of email addresses.
+Returns the same array with any IsRTAddress()es weeded out.
+
+
+=cut
+
+sub CullRTAddresses {
+ my $self = shift;
+ my @addresses= (@_);
+ my @addrlist;
+
+ foreach my $addr( @addresses ) {
+ # We use the class instead of the instance
+ # because sloppy code calls this method
+ # without a $self
+ push (@addrlist, $addr) unless RT::EmailParser->IsRTAddress($addr);
+ }
+ return (@addrlist);
+}
+
+
+
+
+
+# LookupExternalUserInfo is a site-definable method for synchronizing
+# incoming users with an external data source.
+#
+# This routine takes a tuple of EmailAddress and FriendlyName
+# EmailAddress is the user's email address, ususally taken from
+# an email message's From: header.
+# FriendlyName is a freeform string, ususally taken from the "comment"
+# portion of an email message's From: header.
+#
+# If you define an AutoRejectRequest template, RT will use this
+# template for the rejection message.
+
+
+=head2 LookupExternalUserInfo
+
+ LookupExternalUserInfo is a site-definable method for synchronizing
+ incoming users with an external data source.
+
+ This routine takes a tuple of EmailAddress and FriendlyName
+ EmailAddress is the user's email address, ususally taken from
+ an email message's From: header.
+ FriendlyName is a freeform string, ususally taken from the "comment"
+ portion of an email message's From: header.
+
+ It returns (FoundInExternalDatabase, ParamHash);
+
+ FoundInExternalDatabase must be set to 1 before return if the user
+ was found in the external database.
+
+ ParamHash is a Perl parameter hash which can contain at least the
+ following fields. These fields are used to populate RT's users
+ database when the user is created.
+
+ EmailAddress is the email address that RT should use for this user.
+ Name is the 'Name' attribute RT should use for this user.
+ 'Name' is used for things like access control and user lookups.
+ RealName is what RT should display as the user's name when displaying
+ 'friendly' names
+
+=cut
+
+sub LookupExternalUserInfo {
+ my $self = shift;
+ my $EmailAddress = shift;
+ my $RealName = shift;
+
+ my $FoundInExternalDatabase = 1;
+ my %params;
+
+ #Name is the RT username you want to use for this user.
+ $params{'Name'} = $EmailAddress;
+ $params{'EmailAddress'} = $EmailAddress;
+ $params{'RealName'} = $RealName;
+
+ # See RT's contributed code for examples.
+ # http://www.fsck.com/pub/rt/contrib/
+ return ($FoundInExternalDatabase, %params);
+}
+
+=head2 Head
+
+Return the parsed head from this message
+
+=cut
+
+sub Head {
+ my $self = shift;
+ return $self->Entity->head;
+}
+
+=head2 Entity
+
+Return the parsed Entity from this message
+
+=cut
+
+sub Entity {
+ my $self = shift;
+ return $self->{'entity'};
+}
+
+
+
+=head2 _SetupMIMEParser $parser
+
+A private instance method which sets up a mime parser to do its job
+
+=cut
+
+
+ ## 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
+
+sub _SetupMIMEParser {
+ my $self = shift;
+ my $parser = shift;
+
+ # Set up output directory for files; we use $RT::VarPath instead
+ # of File::Spec->tmpdir (e.g., /tmp) beacuse it isn't always
+ # writable.
+ my $tmpdir;
+ if ( -w $RT::VarPath ) {
+ $tmpdir = File::Temp::tempdir( DIR => $RT::VarPath, CLEANUP => 1 );
+ } elsif (-w File::Spec->tmpdir) {
+ $tmpdir = File::Temp::tempdir( TMPDIR => 1, CLEANUP => 1 );
+ } else {
+ $RT::Logger->crit("Neither the RT var directory ($RT::VarPath) nor the system tmpdir (@{[File::Spec->tmpdir]}) are writable; falling back to in-memory parsing!");
+ }
+
+ #If someone includes a message, extract it
+ $parser->extract_nested_messages(1);
+ $parser->extract_uuencode(1); ### default is false
+
+ if ($tmpdir) {
+ # If we got a writable tmpdir, write to disk
+ push ( @{ $self->{'AttachmentDirs'} ||= [] }, $tmpdir );
+ $parser->output_dir($tmpdir);
+ $parser->filer->ignore_filename(1);
+
+ # Set up the prefix for files with auto-generated names:
+ $parser->output_prefix("part");
+
+ # From the MIME::Parser docs:
+ # "Normally, tmpfiles are created when needed during parsing, and destroyed automatically when they go out of scope"
+ # Turns out that the default is to recycle tempfiles
+ # Temp files should never be recycled, especially when running under perl taint checking
+
+ $parser->tmp_recycling(0) if $parser->can('tmp_recycling');
+ } else {
+ # Otherwise, fall back to storing it in memory
+ $parser->output_to_core(1);
+ $parser->tmp_to_core(1);
+ $parser->use_inner_files(1);
+ }
+
+}
+
+=head2 ParseEmailAddress string
+
+Returns a list of Email::Address objects
+Works around the bug that Email::Address 1.889 and earlier
+doesn't handle local-only email addresses (when users pass
+in just usernames on the RT system in fields that expect
+Email Addresses)
+
+We don't handle the case of
+bob, fred@bestpractical.com
+because we don't want to fail parsing
+bob, "Falcone, Fred" <fred@bestpractical.com>
+The next release of Email::Address will have a new method
+we can use that removes the bandaid
+
+=cut
+
+sub ParseEmailAddress {
+ my $self = shift;
+ my $address_string = shift;
+
+ $address_string =~ s/^\s+|\s+$//g;
+
+ my @addresses;
+ # if it looks like a username / local only email
+ if ($address_string !~ /@/ && $address_string =~ /^\w+$/) {
+ my $user = RT::User->new( $RT::SystemUser );
+ my ($id, $msg) = $user->Load($address_string);
+ if ($id) {
+ push @addresses, Email::Address->new($user->Name,$user->EmailAddress);
+ } else {
+ $RT::Logger->error("Unable to parse an email address from $address_string: $msg");
+ }
+ } else {
+ @addresses = Email::Address->parse($address_string);
+ }
+
+ return @addresses;
+
+}
+
+
+sub DESTROY {
+ my $self = shift;
+ File::Path::rmtree([@{$self->{'AttachmentDirs'}}],0,1)
+ if $self->{'AttachmentDirs'};
+}
+
+
+
+eval "require RT::EmailParser_Vendor";
+die $@ if ($@ && $@ !~ qr{^Can't locate RT/EmailParser_Vendor.pm});
+eval "require RT::EmailParser_Local";
+die $@ if ($@ && $@ !~ qr{^Can't locate RT/EmailParser_Local.pm});
+
+1;
generated by cgit v1.1 at 2024-06-23 13:01:06 +0000