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#-*- perl -*-
#
# Copyright (C) 2018 Ken'ichi Fukamachi
# All rights reserved. This program is free software; you can
# redistribute it and/or modify it under the same terms as Perl itself.
#
# $FML$
#
package Mail::Message::Encode::Obsolete;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK $AUTOLOAD);
use Carp;
=head1 NAME
Mail::Message::Encode::Obsolete - obsolete encode/decode routines.
=head1 SYNOPSIS
=head1 DESCRIPTION
Temporarily obsolete functions in Mail::Message::Encode are moved to here.
=head1 MIME ENCODE/DECODE
=head2 encode_mime_string($str, $encode, $out_code, $in_code)
encode string $str to encoding system $encode with output code $out_code.
$in_code is used as a hint.
=cut
# Descriptions: encode string.
# Arguments: OBJ($self) STR($str) STR($encode) STR($out_code) STR($in_code)
# Side Effects: croak() if language is unknown.
# Return Value: STR
sub encode_mime_string
{
my ($self, $str, $encode, $out_code, $in_code) = @_;
my $lang = $self->{ _language };
my $str_orig = $str;
my $str_out = '';
# base64 encoding by default.
$encode ||= 'base64';
# code by default
if ($lang eq 'japanese') {
$out_code ||= 'jis';
$str = $self->convert($str, $out_code, $in_code);
}
else {
croak("Mail::Message::Encode: unknown language");
}
if ($encode eq 'base64') {
eval q{
use IM::Iso2022jp;
$str_out = line_iso2022jp_mimefy($str);
};
}
elsif ($encode eq 'qp') {
eval q{
use IM::Iso2022jp;
$main::HdrQEncoding = 1;
$str_out = line_iso2022jp_mimefy($str);
$main::HdrQEncoding = 0;
};
}
else {
croak("Mail::Message::Encode: unknown encoding");
}
return $str_out ? $str_out : $str_orig;
}
=head2 decode_mime_string(string, [$options])
decode a base64/quoted-printable encoded string to a plain message.
The encoding method is automatically detected.
C<$options> is a HASH REFERENCE.
You can specify the charset of the string to return
by $options->{ charset }.
[reference] RFC1554 says:
reg# character set ESC sequence designated to
------------------------------------------------------------------
6 ASCII ESC 2/8 4/2 ESC ( B G0
42 JIS X 0208-1978 ESC 2/4 4/0 ESC $ @ G0
87 JIS X 0208-1983 ESC 2/4 4/2 ESC $ B G0
14 JIS X 0201-Roman ESC 2/8 4/10 ESC ( J G0
58 GB2312-1980 ESC 2/4 4/1 ESC $ A G0
149 KSC5601-1987 ESC 2/4 2/8 4/3 ESC $ ( C G0
159 JIS X 0212-1990 ESC 2/4 2/8 4/4 ESC $ ( D G0
100 ISO8859-1 ESC 2/14 4/1 ESC . A G2
126 ISO8859-7(Greek) ESC 2/14 4/6 ESC . F G2
=cut
# Descriptions: decode MIME string.
# Arguments: OBJ($self) STR($str) STR($out_code) STR($in_code)
# Side Effects: croak() if language is unknown.
# Return Value: STR
sub decode_mime_string
{
my ($self, $str, $out_code, $in_code) = @_;
my $lang = $self->{ _language };
my $str_out = '';
unless ($str) { return $str;}
if ($lang eq 'japanese') {
if ($str =~ /=\?utf-8\?[bq]\?/i) {
$str_out = $self->decode_mime_utf8_to_euc($str);
}
else {
eval q{
use IM::EncDec;
$str_out = mime_decode_string( $str );
};
return $str if $@;
}
# XXX IM returns "ESC$(B ... " string but
# XXX mule 2.3 cannot read "ESC$(B ... ESC(B" string as JIS.
# XXX ng detects it as ASCII.
# XXX Whereas, w3m looks to be able to read it ?
$str_out =~ s/^\e\$\(B/\e\$B/; # make mule read this string.
# XXX-TODO: use Mail::Message::Charset ?
$in_code = $self->detect_code($str_out);
$out_code |= 'euc-jp'; # euc-jp by default.
}
else {
croak("Mail::Message::Encode: unknown language");
}
return $self->convert($str_out, $out_code, $in_code);
}
# Descriptions: decode mime encoded string for utf8.
# Arguments: OBJ($self) STR($str)
# Side Effects: none
# Return Value: STR
sub decode_mime_utf8_to_euc
{
my ($self, $str) = @_;
if ($str =~ /=\?utf-8\?(\w)\?/i) {
if ($1 =~ /B/i) {
$str =~ s/=\?utf-8\?B\?([A-Za-z0-9+\/]+=*)\?=/$1/gi;
$str = $self->raw_decode_base64($str);
}
elsif ($1 =~ /Q/i) {
$str =~ s/=\?utf-8\?q\?([\x20-\x7e\t]+?)\?=/$1/gi;
$str = $self->raw_decode_qp($str);
}
}
$str =~ s/\n//g;
use Jcode;
return Jcode->new($str,"utf8")->euc;
}
=head1 CODING STYLE
See C<http://www.fml.org/software/FNF/> on fml coding style guide.
=head1 AUTHOR
Ken'ichi Fukamachi
=head1 COPYRIGHT
Copyright (C) 2018 Ken'ichi Fukamachi
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
=head1 HISTORY
Mail::Message::Encode first appeared in fml8 mailing list driver package.
See C<http://www.fml.org/> for more details.
=cut
1;
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