Message/Body/Multipart.pm


=head1 NAME

Message::Body::Multipart --- Perl module
for "multipart/*" Internet Media Types

=cut

package Message::Body::Multipart;
use strict;
use vars qw(%DEFAULT @ISA $VERSION);
$VERSION=do{my @r=(q$Revision: 1.1 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};

require Message::Body::Text;
push @ISA, qw(Message::Body::Text);

my @BCHARS = ('0'..'9', 'A'..'Z', 'a'..'z', qw#+ _ , - . / : =#);
#my @BCHARS = ('0'..'9', 'A'..'Z', 'a'..'z', qw#' ( ) + _ , - . / : = ?#, ' '); ## RFC 2046
my %REG;
$REG{NON_bchars} = qr#[^0-9A-Za-z'()+_,-./:=?\x20]#;

%DEFAULT = (
        ## "#i" : only inherited from parent Entity and inherits to child Entity
  -_ARRAY_NAME  => 'value',
  -_METHODS     => [qw|entity_header add delete count item preamble epilogue|],
  -_MEMBERS     => [qw|boundary preamble epilogue|],
  #i accept_cte
  #i body_default_charset
  #i body_default_charset_input
  #i cte_default
  -default_media_type   => 'text',
  -default_media_subtype        => 'plain',
  -media_type   => 'multipart',
  -media_subtype        => 'mixed',
  #output_epilogue
  -parse_all    => 0,
  #i text_coderange
  #use_normalization    => 0,
  #use_param_charset    => 0,
  -value_type   => {},
);

=head1 CONSTRUCTORS

The following methods construct new objects:

=over 4

=cut

## Initialize of this class -- called by constructors
sub _init ($;%) {
  my $self = shift;
  my $DEFAULT = Message::Util::make_clone (\%DEFAULT);
  my %option = @_;
  $self->SUPER::_init (%$DEFAULT, %option);
  
  unless (defined $self->{option}->{output_epilogue}) {
    $self->{option}->{output_epilogue} = $self->{option}->{format} !~ /http/;
  }
  $self->{option}->{value_type}->{body_part}->[1]->{-format}
    = 
  my @ilist = qw/accept_coderange body_default_charset body_default_charset_input cte_default text_coderange/;
  $self->{option}->{value_type}->{preamble} = ['Message::Body::TextPlain',
    {-media_type => 'text', -media_subtype => '/multipart-preamble'},
    \@ilist];
  $self->{option}->{value_type}->{body_part} = sub {['Message::Entity',
    {-format => $_[0]->{option}->{format} . '/' . 'mime-entity',
    -body_default_media_type => $_[0]->{option}->{default_media_type},
    -body_default_media_subtype => $_[0]->{option}->{default_media_subtype}},
    \@ilist]};
  $self->{option}->{value_type}->{epilogue} = ['Message::Body::TextPlain',
    {-media_type => 'text', -media_subtype => '/multipart-epilogue'},
    \@ilist];
  
  $self->{boundary} = $option{boundary};
  if (!length $self->{boundary} && ref $self->{header}) {
    my $ct = $self->{header}->field ('content-type', -new_item_unless_exist => 0);
    $self->{boundary} = $ct->parameter ('boundary') if ref $ct;
  }
}

=item $body = Message::Body::Multipart->new ([%options])

Constructs a new object.  You might pass some options as parameters 
to the constructor.

=cut

## Inherited

=item $body = Message::Body::Multipart->parse ($body, [%options])

Constructs a new object with given field body.  You might pass 
some options as parameters to the constructor.

=cut

sub parse ($$;%) {
  my $class = shift;
  my $self = bless {}, $class;
  my $body = shift;
  $self->_init (@_);
  my $b = $self->{boundary};
  if (length $b) {
    $self->{value} = [ split /\x0D\x0A--\Q$b\E[\x09\x20]*\x0D\x0A/, $body ];
    if (length $self->{value}->[0]) {
      my @p = split /(?:\x0D\x0A)?--\Q$b\E[\x09\x20]*\x0D\x0A/, $self->{value}->[0], 2;
      $self->{preamble} = $p[0];
      if (length $p[1]) {
        $self->{value}->[0] = $p[1];
      } else { shift (@{$self->{value}}) }
    }
    if (length $self->{value}->[-1]) {
      my @p = split /\x0D\x0A--\Q$b\E--[\x09\x20]*(?:\x0D\x0A)?/, $self->{value}->[-1], 2;
      $self->{value}->[-1] = $p[0];
      $self->{epilogue} = $p[1];
    }
  } else {
    $self->{preamble} = [ $body ];
  }
  if ($self->{option}->{parse_all}) {
    $self->{value} = [map {
      $self->_parse_value (body_part => $_);
    } @{$self->{value}}];
    $self->{preamble} = $self->_parse_value (preamble => $self->{preamble});
    $self->{epilogue} = $self->_parse_value (epilogue => $self->{epilogue});
  }
  $self;
}

=back

=cut

## add, item, delete, count

## item-by?, \$checked-item, {item-key => 1}, \%option
sub _item_match ($$\$\%\%) {
  my $self = shift;
  my ($by, $i, $list, $option) = @_;
  return 0 unless ref $$i;  ## Already removed
  if ($by eq 'content-type') {
    $$i = $self->_parse_value (body_part => $$i);
    return 1 if ref $$i && $$list{$$i->content_type};
  } elsif ($by eq 'content-id') {
    $$i = $self->_parse_value (body_part => $$i);
    return 1 if ref $$i && ( $$list{$$i->id} || $$list{'<'.$$i->id.'>'} );
  }
  0;
}
*_delete_match = \&_item_match;

## Returns returned item value    \$item-value, \%option
sub _item_return_value ($\$\%) {
  unless (ref ${$_[1]}) {
    ${$_[1]} = $_[0]->_parse_value (body_part => ${$_[1]});
  }
  ${$_[1]};
}
*_add_return_value = \&_item_return_value;

## Returns returned (new created) item value    $name, \%option
sub _item_new_value ($$\%) {
  my $v = shift->_parse_value (body_part => '');
  my ($key, $option) = @_;
  if ($option->{by} eq 'content-type') {
    $v->header->field ('content-type')->media_type ($key);
  } elsif ($option->{by} eq 'content-id') {
    $v->header->add ('content-id' => $key);
  }
  $v;
}

sub _add_array_check ($$\%) {
  my $self = shift;
  my ($value, $option) = @_;
  my $value_option = {};
  if (ref $value eq 'ARRAY') {
    ($value, %$value_option) = @$value;
  }
  $value = $self->_parse_value (body_part => $value) if $$option{parse};
  $$option{parse} = 0;
  (1, value => $value);
}

## entity_header: Inherited

sub preamble ($;$) {
  my $self = shift;
  my $np = shift;
  if (defined $np) {
    $np = $self->_parse_value (preamble => $np) if $self->{option}->{parse_all};
    $self->{preamble} = $np;
  }
  $self->{preamble};
}
sub epilogue ($;$) {
  my $self = shift;
  my $np = shift;
  if (defined $np) {
    $np = $self->_parse_value (epilogue => $np) if $self->{option}->{parse_all};
    $self->{epilogue} = $np;
  }
  $self->{epilogue};
}

=head2 $self->stringify ([%option])

Returns the C<body> as a string.

=cut

sub stringify ($;%) {
  my $self = shift;
  my %o = @_;  my %option = %{$self->{option}};
  for (grep {/^-/} keys %o) {$option{substr ($_, 1)} = $o{$_}}
  my $max = $option{max} || $#{$self->{value}}+1;  $max--;
  $max = $#{$self->{value}} if $max > $#{$self->{value}};
  my @parts = map { ''. $_ } @{$self->{value}}[0..$max];
  my $b = $self->{boundary};
  if ($b =~ $REG{NON_bchars} || length ($b) > 70) {
    undef $b;
  } elsif (substr ($b, -1, 1) eq "\x20") {
    $b .= 'B';
  }
  my $blength = 45;
  $b ||= $self->_generate_boundary ($blength);
  my $i = 1; while ($i++) {
    my @t = grep {/\Q--$b\E/} @parts;
    last if @t == 0;
    $b = $self->_generate_boundary ($blength);
    if ($i > @BCHARS ** $blength) {
      $blength++; $i = 1;
    }
  }
  if (ref $self->{header}) {
    $self->{header}->field ('content-type')->parameter (boundary => $b);
  }
  $self->{preamble}."\x0D\x0A--".$b."\x0D\x0A".
  join ("\x0D\x0A--".$b."\x0D\x0A", @parts)
  ."\x0D\x0A--$b--\x0D\x0A".
  ($option{output_epilogue}? $self->{epilogue}: '');
}
*as_string = \&stringify;

## Inherited: option, clone

## $self->_option_recursive (\%argv)
sub _option_recursive ($\%) {
  my $self = shift;
  my $o = shift;
  for (@{$self->{value}}) {
    $_->option (%$o) if ref $_;
  }
  $self->{preamble}->option (%$o) if ref $self->{preamble};
  $self->{epilogue}->option (%$o) if ref $self->{epilogue};
}

sub _generate_boundary ($$) {
  my $self = shift;
  my $blength = shift || 45;    ## Length of boundary
  join('', map($BCHARS[rand @BCHARS], 1..$blength));
}

=head1 SEE ALSO

RFC 2046 <urn:ietf:rfc:2046>

=head1 LICENSE

Copyright 2002 wakaba E<lt>w@suika.fam.cxE<gt>.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

=head1 CHANGE

See F<ChangeLog>.
$Date: 2002/06/09 10:57:16 $

=cut

1;
1	wakaba	1.1
2			=head1 NAME
3
4			Message::Body::Multipart --- Perl module
5			for "multipart/*" Internet Media Types
6
7			=cut
8
9			package Message::Body::Multipart;
10			use strict;
11			use vars qw(%DEFAULT @ISA $VERSION);
12			$VERSION=do{my @r=(q$Revision: 1.1 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
13
14			require Message::Body::Text;
15			push @ISA, qw(Message::Body::Text);
16
17			my @BCHARS = ('0'..'9', 'A'..'Z', 'a'..'z', qw#+ _ , - . / : =#);
18			#my @BCHARS = ('0'..'9', 'A'..'Z', 'a'..'z', qw#' ( ) + _ , - . / : = ?#, ' '); ## RFC 2046
19			my %REG;
20			$REG{NON_bchars} = qr#[^0-9A-Za-z'()+_,-./:=?\x20]#;
21
22			%DEFAULT = (
23			## "#i" : only inherited from parent Entity and inherits to child Entity
24			-_ARRAY_NAME => 'value',
25	wakaba	1.2	-_METHODS => [qw\|entity_header add delete count item preamble epilogue\|],
26			-_MEMBERS => [qw\|boundary preamble epilogue\|],
27	wakaba	1.1	#i accept_cte
28			#i body_default_charset
29			#i body_default_charset_input
30			#i cte_default
31			-default_media_type => 'text',
32			-default_media_subtype => 'plain',
33			-media_type => 'multipart',
34			-media_subtype => 'mixed',
35			#output_epilogue
36			-parse_all => 0,
37			#i text_coderange
38			#use_normalization => 0,
39			#use_param_charset => 0,
40			-value_type => {},
41			);
42
43			=head1 CONSTRUCTORS
44
45			The following methods construct new objects:
46
47			=over 4
48
49			=cut
50
51			## Initialize of this class -- called by constructors
52			sub _init ($;%) {
53			my $self = shift;
54			my $DEFAULT = Message::Util::make_clone (\%DEFAULT);
55			my %option = @_;
56			$self->SUPER::_init (%$DEFAULT, %option);
57
58			unless (defined $self->{option}->{output_epilogue}) {
59			$self->{option}->{output_epilogue} = $self->{option}->{format} !~ /http/;
60			}
61			$self->{option}->{value_type}->{body_part}->[1]->{-format}
62			=
63			my @ilist = qw/accept_coderange body_default_charset body_default_charset_input cte_default text_coderange/;
64			$self->{option}->{value_type}->{preamble} = ['Message::Body::TextPlain',
65			{-media_type => 'text', -media_subtype => '/multipart-preamble'},
66			\@ilist];
67			$self->{option}->{value_type}->{body_part} = sub {['Message::Entity',
68			{-format => $_[0]->{option}->{format} . '/' . 'mime-entity',
69			-body_default_media_type => $_[0]->{option}->{default_media_type},
70			-body_default_media_subtype => $_[0]->{option}->{default_media_subtype}},
71			\@ilist]};
72			$self->{option}->{value_type}->{epilogue} = ['Message::Body::TextPlain',
73			{-media_type => 'text', -media_subtype => '/multipart-epilogue'},
74			\@ilist];
75
76			$self->{boundary} = $option{boundary};
77			if (!length $self->{boundary} && ref $self->{header}) {
78			my $ct = $self->{header}->field ('content-type', -new_item_unless_exist => 0);
79			$self->{boundary} = $ct->parameter ('boundary') if ref $ct;
80			}
81			}
82
83			=item $body = Message::Body::Multipart->new ([%options])
84
85			Constructs a new object. You might pass some options as parameters
86			to the constructor.
87
88			=cut
89
90			## Inherited
91
92			=item $body = Message::Body::Multipart->parse ($body, [%options])
93
94			Constructs a new object with given field body. You might pass
95			some options as parameters to the constructor.
96
97			=cut
98
99			sub parse ($$;%) {
100			my $class = shift;
101			my $self = bless {}, $class;
102			my $body = shift;
103			$self->_init (@_);
104			my $b = $self->{boundary};
105			if (length $b) {
106			$self->{value} = [ split /\x0D\x0A--\Q$b\E[\x09\x20]*\x0D\x0A/, $body ];
107			if (length $self->{value}->[0]) {
108			my @p = split /(?:\x0D\x0A)?--\Q$b\E[\x09\x20]*\x0D\x0A/, $self->{value}->[0], 2;
109			$self->{preamble} = $p[0];
110			if (length $p[1]) {
111			$self->{value}->[0] = $p[1];
112			} else { shift (@{$self->{value}}) }
113			}
114			if (length $self->{value}->[-1]) {
115			my @p = split /\x0D\x0A--\Q$b\E--[\x09\x20]*(?:\x0D\x0A)?/, $self->{value}->[-1], 2;
116			$self->{value}->[-1] = $p[0];
117			$self->{epilogue} = $p[1];
118			}
119			} else {
120			$self->{preamble} = [ $body ];
121			}
122			if ($self->{option}->{parse_all}) {
123			$self->{value} = [map {
124			$self->_parse_value (body_part => $_);
125			} @{$self->{value}}];
126			$self->{preamble} = $self->_parse_value (preamble => $self->{preamble});
127			$self->{epilogue} = $self->_parse_value (epilogue => $self->{epilogue});
128			}
129			$self;
130			}
131
132			=back
133
134			=cut
135
136	wakaba	1.2	## add, item, delete, count
137
138			## item-by?, \$checked-item, {item-key => 1}, \%option
139			sub _item_match ($$\$\%\%) {
140			my $self = shift;
141			my ($by, $i, $list, $option) = @_;
142			return 0 unless ref $$i; ## Already removed
143			if ($by eq 'content-type') {
144			$$i = $self->_parse_value (body_part => $$i);
145			return 1 if ref $$i && $$list{$$i->content_type};
146			} elsif ($by eq 'content-id') {
147			$$i = $self->_parse_value (body_part => $$i);
148			return 1 if ref $$i && ( $$list{$$i->id} \|\| $$list{'<'.$$i->id.'>'} );
149			}
150			0;
151			}
152			*_delete_match = \&_item_match;
153
154			## Returns returned item value \$item-value, \%option
155			sub _item_return_value ($\$\%) {
156			unless (ref ${$_[1]}) {
157			${$_[1]} = $_[0]->_parse_value (body_part => ${$_[1]});
158			}
159			${$_[1]};
160			}
161			*_add_return_value = \&_item_return_value;
162
163			## Returns returned (new created) item value $name, \%option
164			sub _item_new_value ($$\%) {
165			my $v = shift->_parse_value (body_part => '');
166			my ($key, $option) = @_;
167			if ($option->{by} eq 'content-type') {
168			$v->header->field ('content-type')->media_type ($key);
169			} elsif ($option->{by} eq 'content-id') {
170			$v->header->add ('content-id' => $key);
171			}
172			$v;
173			}
174
175			sub _add_array_check ($$\%) {
176			my $self = shift;
177			my ($value, $option) = @_;
178			my $value_option = {};
179			if (ref $value eq 'ARRAY') {
180			($value, %$value_option) = @$value;
181			}
182			$value = $self->_parse_value (body_part => $value) if $$option{parse};
183			$$option{parse} = 0;
184			(1, value => $value);
185			}
186
187	wakaba	1.1	## entity_header: Inherited
188
189	wakaba	1.2	sub preamble ($;$) {
190			my $self = shift;
191			my $np = shift;
192			if (defined $np) {
193			$np = $self->_parse_value (preamble => $np) if $self->{option}->{parse_all};
194			$self->{preamble} = $np;
195			}
196			$self->{preamble};
197			}
198			sub epilogue ($;$) {
199			my $self = shift;
200			my $np = shift;
201			if (defined $np) {
202			$np = $self->_parse_value (epilogue => $np) if $self->{option}->{parse_all};
203			$self->{epilogue} = $np;
204			}
205			$self->{epilogue};
206			}
207
208	wakaba	1.1	=head2 $self->stringify ([%option])
209
210			Returns the C<body> as a string.
211
212			=cut
213
214			sub stringify ($;%) {
215			my $self = shift;
216			my %o = @_; my %option = %{$self->{option}};
217			for (grep {/^-/} keys %o) {$option{substr ($_, 1)} = $o{$_}}
218			my $max = $option{max} \|\| $#{$self->{value}}+1; $max--;
219			$max = $#{$self->{value}} if $max > $#{$self->{value}};
220			my @parts = map { ''. $_ } @{$self->{value}}[0..$max];
221			my $b = $self->{boundary};
222			if ($b =~ $REG{NON_bchars} \|\| length ($b) > 70) {
223			undef $b;
224			} elsif (substr ($b, -1, 1) eq "\x20") {
225			$b .= 'B';
226			}
227			my $blength = 45;
228			$b \|\|= $self->_generate_boundary ($blength);
229			my $i = 1; while ($i++) {
230			my @t = grep {/\Q--$b\E/} @parts;
231			last if @t == 0;
232			$b = $self->_generate_boundary ($blength);
233			if ($i > @BCHARS ** $blength) {
234			$blength++; $i = 1;
235			}
236			}
237			if (ref $self->{header}) {
238			$self->{header}->field ('content-type')->parameter (boundary => $b);
239			}
240			$self->{preamble}."\x0D\x0A--".$b."\x0D\x0A".
241			join ("\x0D\x0A--".$b."\x0D\x0A", @parts)
242			."\x0D\x0A--$b--\x0D\x0A".
243			($option{output_epilogue}? $self->{epilogue}: '');
244			}
245			*as_string = \&stringify;
246
247			## Inherited: option, clone
248
249			## $self->_option_recursive (\%argv)
250			sub _option_recursive ($\%) {
251			my $self = shift;
252			my $o = shift;
253			for (@{$self->{value}}) {
254			$_->option (%$o) if ref $_;
255			}
256			$self->{preamble}->option (%$o) if ref $self->{preamble};
257			$self->{epilogue}->option (%$o) if ref $self->{epilogue};
258			}
259
260			sub _generate_boundary ($$) {
261			my $self = shift;
262			my $blength = shift \|\| 45; ## Length of boundary
263			join('', map($BCHARS[rand @BCHARS], 1..$blength));
264			}
265
266			=head1 SEE ALSO
267
268			RFC 2046 <urn:ietf:rfc:2046>
269
270			=head1 LICENSE
271
272			Copyright 2002 wakaba E<lt>w@suika.fam.cxE<gt>.
273
274			This program is free software; you can redistribute it and/or modify
275			it under the terms of the GNU General Public License as published by
276			the Free Software Foundation; either version 2 of the License, or
277			(at your option) any later version.
278
279			This program is distributed in the hope that it will be useful,
280			but WITHOUT ANY WARRANTY; without even the implied warranty of
281			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
282			GNU General Public License for more details.
283
284			You should have received a copy of the GNU General Public License
285			along with this program; see the file COPYING. If not, write to
286			the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
287			Boston, MA 02111-1307, USA.
288
289			=head1 CHANGE
290
291			See F<ChangeLog>.
292	wakaba	1.2	$Date: 2002/06/09 10:57:16 $
293	wakaba	1.1
294			=cut
295
296			1;