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revision 1.16 by wakaba, Fri Apr 19 12:00:36 2002 UTC revision 1.31 by wakaba, Sat Jul 6 10:30:10 2002 UTC
# Line 1  Line 1 
1    
2  =head1 NAME  =head1 NAME
3    
4  Message::Header Perl module  Message::Header --- A Perl Module for Internet Message Headers
   
 =head1 DESCRIPTION  
   
 Perl module for RFC 822/2822 message C<header>.  
5    
6  =cut  =cut
7    
8  package Message::Header;  package Message::Header;
9  use strict;  use strict;
10  use vars qw($VERSION %REG);  use vars qw(%DEFAULT @ISA %REG $VERSION);
11  $VERSION = '1.00';  $VERSION=do{my @r=(q$Revision$=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
12  use Carp ();  require Message::Field::Structured;     ## This may seem silly:-)
13  use overload '@{}' => sub { shift->_delete_empty_field->{field} },  push @ISA, qw(Message::Field::Structured);
14               '""' => sub { shift->stringify },  
15               fallback => 1;  %REG = %Message::Util::REG;
16            $REG{M_field} = qr/^([^\x3A]+):$REG{FWS}([\x00-\xFF]*)$/;
17  $REG{WSP}     = qr/[\x09\x20]/;          $REG{M_fromline} = qr/^\x3E?From$REG{WSP}+([\x00-\xFF]*)$/;
18  $REG{FWS}     = qr/[\x09\x20]*/;          $REG{ftext} = qr/[\x21-\x39\x3B-\x7E]+/;        ## [2]822
19  $REG{M_field} = qr/^([^\x3A]+):$REG{FWS}([\x00-\xFF]*)$/;          $REG{NON_ftext} = qr/[^\x21-\x39\x3B-\x7E]/;    ## [2]822
20  $REG{M_fromline} = qr/^\x3E?From$REG{WSP}+([\x00-\xFF]*)$/;          $REG{NON_ftext_usefor} = qr/[^0-9A-Za-z-]/;     ## name-character
21  $REG{UNSAFE_field_name} = qr/[\x00-\x20\x3A\x7F-\xFF]/;          $REG{NON_ftext_http} = $REG{NON_http_token};
22    
23  =head2 options  ## Namespace support
24            our %NS_phname2uri;     ## PH-namespace name -> namespace URI
25  These options can be getten/set by C<get_option>/C<set_option>          our %NS_uri2phpackage;  ## namespace URI -> PH-package name
26  method.          require Message::Header::Default;       ## Default namespace
27    
28  =head3 capitalize = 0/1  ## Initialize of this class -- called by constructors
29    %DEFAULT = (
30  (First character of) C<field-name> is capitalized      -_HASH_NAME => 'value',
31  when C<stringify>.  (Default = 1)      -_METHODS   => [qw|field field_exist field_type add replace count delete subject id is|],
32        -_MEMBERS   => [qw|value|],
33  =head3 fold_length = numeric value      -_VALTYPE_DEFAULT   => ':default',
34        -by => 'name',
35  Length of line used to fold.  (Default = 70)      -field_format_pattern       => '%s: %s',
36        -field_name_case_sensible   => 0,
37  =head3 mail_from = 0/1      -field_name_unsafe_rule     => 'NON_ftext',
38        -field_name_validation      => 0,
39  Outputs "From " line (known as Un*x From, Mail-From, and so on)      -field_sort => 0,
40  when C<stringify>.  (Default = 0)      -format     => 'mail-rfc2822',
41        -header_default_charset     => 'iso-2022-int-1',
42  =cut      -header_default_charset_input       => 'iso-2022-int-1',
43        -linebreak_strict   => 0,
44  =head1 CONSTRUCTORS      -line_length_max    => 60,  ## For folding
45        #ns_default_phuri
46  The following methods construct new C<Message::Header> objects:      -output_bcc => 0,
47        -output_folding     => 1,
48  =over 4      -output_mail_from   => 0,
49        #parse_all
50  =cut      -translate_underscore       => 1,
51        #uri_mailto_safe
52  ## Initialize      -uri_mailto_safe_level      => 4,
53  my %DEFAULT = (      -use_folding        => 1,
54    capitalize    => 1,      #value_type
   fold_length   => 70,  
   #field_type   => {},  
   format        => 'mail-rfc2822',  
   mail_from     => 0,  
   output_bcc    => 0,  
   parse_all     => 0,  
   sort  => 'none',  
   translate_underscore  => 1,  
   validate      => 1,  
55  );  );
 $DEFAULT{field_type} = {  
         ':DEFAULT'      => 'Message::Field::Unstructured',  
           
         received        => 'Message::Field::Received',  
         'x-received'    => 'Message::Field::Received',  
           
         'content-type'  => 'Message::Field::ContentType',  
         'content-disposition'   => 'Message::Field::ContentDisposition',  
         'auto-submitted'        => 'Message::Field::ValueParams',  
         link    => 'Message::Field::ValueParams',  
         archive => 'Message::Field::ValueParams',  
         'x-face-type'   => 'Message::Field::ValueParams',  
           
         subject => 'Message::Field::Subject',  
         'x-nsubject'    => 'Message::Field::Subject',  
           
         'list-software' => 'Message::Field::UA',  
         'user-agent'    => 'Message::Field::UA',  
         server  => 'Message::Field::UA',  
           
         ## Numeric value  
         'content-length'        => 'Message::Field::Numval',  
         lines   => 'Message::Field::Numval',  
         'max-forwards'  => 'Message::Field::Numval',  
         'mime-version'  => 'Message::Field::Numval',  
         'x-jsmail-priority'     => 'Message::Field::Numval',  
         'x-mail-count'  => 'Message::Field::Numval',  
         'x-ml-count'    => 'Message::Field::Numval',  
         'x-priority'    => 'Message::Field::Numval',  
           
         path    => 'Message::Field::Path',  
 };  
 for (qw(archive cancel-lock content-features content-md5  
   disposition-notification-options encoding  
   importance injector-info  
   pics-label posted-and-mailed precedence list-id message-type  
   original-recipient priority  
   sensitivity status x-face x-msmail-priority xref))  
   {$DEFAULT{field_type}->{$_} = 'Message::Field::Structured'}  
         ## Not supported yet, but to be supported...  
 for (qw(abuse-reports-to apparently-to approved approved-by bcc cc complaints-to  
   delivered-to disposition-notification-to envelope-to  
   errors-to  from mail-copies-to mail-followup-to mail-reply-to  
   notice-requested-upon-delivery-to read-receipt-to register-mail-reply-requested-by  
   reply-to resent-bcc  
   resent-cc resent-to resent-from resent-sender return-path  
   return-receipt-to return-receipt-requested-to sender to x-abuse-reports-to  
   x-admin x-approved  
   x-beenthere  
   x-confirm-reading-to  
   x-complaints-to x-envelope-from x-envelope-sender  
   x-envelope-to x-ml-address x-ml-command x-ml-to x-nfrom x-nto  
   x-rcpt-to x-sender x-x-sender))  
   {$DEFAULT{field_type}->{$_} = 'Message::Field::Address'}  
 for (qw(date date-received delivery-date expires  
   expire-date nntp-posting-date posted posted-date reply-by resent-date  
   x-originalarrivaltime x-tcup-date))  
   {$DEFAULT{field_type}->{$_} = 'Message::Field::Date'}  
 for (qw(article-updates client-date content-id in-reply-to message-id  
   obsoletes references replaces resent-message-id see-also supersedes))  
   {$DEFAULT{field_type}->{$_} = 'Message::Field::MsgID'}  
 for (qw(accept accept-charset accept-encoding accept-language  
   content-language  
   content-transfer-encoding encrypted followup-to keywords  
   list-archive list-digest list-help list-owner  
   list-post list-subscribe list-unsubscribe list-url uri newsgroups  
   posted-to  
   x-brother x-daughter x-respect x-moe x-syster x-wife))  
   {$DEFAULT{field_type}->{$_} = 'Message::Field::CSV'}  
 for (qw(content-alias content-base content-location location referer  
   url x-home-page x-http_referer  
   x-info x-pgp-key x-ml-url x-uri x-url x-web))  
   {$DEFAULT{field_type}->{$_} = 'Message::Field::URI'}  
56    
57  ## taken from L<HTTP::Header>  ## taken from L<HTTP::Header>
58  # "Good Practice" order of HTTP message headers:  # "Good Practice" order of HTTP message headers:
# Line 170  my @header_order = qw( Line 84  my @header_order = qw(
84  );  );
85  my %header_order;  my %header_order;
86    
87    =head1 CONSTRUCTORS
88    
89    The following methods construct new C<Message::Header> objects:
90    
91    =over 4
92    
93    =cut
94    
95  sub _init ($;%) {  sub _init ($;%) {
96    my $self = shift;    my $self = shift;
97    my %options = @_;    my %options = @_;
98    $self->{field} = [];    my $DEFAULT = Message::Util::make_clone (\%DEFAULT);
99    $self->{option} = \%DEFAULT;    $self->SUPER::_init (%$DEFAULT, %options);
100      $self->{value} = [];
101      $self->_ns_load_ph ('default');
102      $self->_ns_load_ph ('x-rfc822');
103      $self->_ns_load_ph ('x-http');
104      $self->{option}->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'}
105        unless $self->{option}->{ns_default_phuri};
106      
107      ## For text/rfc822-headers
108      if (ref $options{entity_header}) {
109        $self->{entity_header} = $options{entity_header};
110        delete $options{entity_header};
111      }
112    my @new_fields = ();    my @new_fields = ();
113    for my $name (keys %options) {    for my $name (keys %options) {
114      if (substr ($name, 0, 1) eq '-') {      unless (substr ($name, 0, 1) eq '-') {
       $self->{option}->{substr ($name, 1)} = $options{$name};  
     } else {  
115        push @new_fields, ($name => $options{$name});        push @new_fields, ($name => $options{$name});
116      }      }
117    }    }
118    $self->add (@new_fields, -parse => $self->{option}->{parse_all})    $self->_init_by_format ($self->{option}->{format}, $self->{option});
     if $#new_fields > -1;  
     
   my $format = $self->{option}->{format};  
   if ($format =~ /^cgi/) {  
     unshift @header_order, qw(content-type location);  
     $self->{option}->{sort} = 'good-practice';  
   } elsif ($format =~ /^http/) {  
     $self->{option}->{sort} = 'good-practice';  
   }  
     
119    # Make alternative representations of @header_order.  This is used    # Make alternative representations of @header_order.  This is used
120    # for sorting.    # for sorting.
121    my $i = 1;    my $i = 1;
122    for (@header_order) {    for (@header_order) {
123        $header_order{$_} = $i++ unless $header_order{$_};        $header_order{$_} = $i++ unless $header_order{$_};
124    }    }
125      
126      $self->add (@new_fields, -parse => $self->{option}->{parse_all})
127        if $#new_fields > -1;
128    }
129    
130    sub _init_by_format ($$\%) {
131      my $self = shift;
132      my ($format, $option) = @_;
133      if ($format =~ /http/) {
134        $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-http'};
135        if ($format =~ /cgi/) {
136          unshift @header_order, qw(content-type location);
137          $option->{field_sort} = 'good-practice';
138          $option->{use_folding} = 0;
139        } else {
140          $option->{field_sort} = 'good-practice';
141        }
142      } else {      ## RFC 822
143        $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'};
144      }
145      if ($format =~ /uri-url-mailto/) {
146        $option->{output_bcc} = 0;
147        $option->{field_format_pattern} = '%s=%s';
148        $option->{output_folding} = sub {
149          $_[1] =~ s/([^:@+\$A-Za-z0-9\-_.!~*])/sprintf('%%%02X', ord $1)/ge;
150          $_[1];
151        };  ## Yes, this is not folding!
152      }
153  }  }
154    
155  =item Message::Header->new ([%initial-fields/options])  =item $msg = Message::Header->new ([%initial-fields/options])
156    
157  Constructs a new C<Message::Headers> object.  You might pass some initial  Constructs a new C<Message::Headers> object.  You might pass some initial
158  C<field-name>-C<field-body> pairs and/or options as parameters to the constructor.  C<field-name>-C<field-body> pairs and/or options as parameters to the constructor.
# Line 218  Example: Line 168  Example:
168    
169  =cut  =cut
170    
171  sub new ($;%) {  ## Inherited
   my $class = shift;  
   my $self = bless {}, $class;  
   $self->_init (@_);  
   $self;  
 }  
172    
173  =item Message::Header->parse ($header, [%initial-fields/options])  =item $msg = Message::Header->parse ($header, [%initial-fields/options])
174    
175  Parses given C<header> and constructs a new C<Message::Headers>  Parses given C<header> and constructs a new C<Message::Headers>
176  object.  You might pass some additional C<field-name>-C<field-body> pairs  object.  You might pass some additional C<field-name>-C<field-body> pairs
# Line 238  sub parse ($$;%) { Line 183  sub parse ($$;%) {
183    my $header = shift;    my $header = shift;
184    my $self = bless {}, $class;    my $self = bless {}, $class;
185    $self->_init (@_);    $self->_init (@_);
186    $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos;     ## unfold    if ($self->{option}->{linebreak_strict}) {
187        $header =~ s/\x0D\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
188      } else {
189        $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
190      }
191    for my $field (split /\x0D?\x0A/, $header) {    for my $field (split /\x0D?\x0A/, $header) {
192      if ($field =~ /$REG{M_fromline}/) {      if ($field =~ /$REG{M_fromline}/) {
193        my $body = $1;        my ($s,undef,$value) = $self->_value_to_arrayitem
194        $body = $self->_field_body ($body, 'mail-from')          ('mail-from' => $1, $self->{option});
195          if $self->{option}->{parse_all};        push @{$self->{value}}, $value if $s;
       push @{$self->{field}}, {name => 'mail-from', body => $body};  
196      } elsif ($field =~ /$REG{M_field}/) {      } elsif ($field =~ /$REG{M_field}/) {
197        my ($name, $body) = (lc $1, $2);        my ($name, $body) = ($1, $2);
       $name =~ s/$REG{WSP}+$//;  
198        $body =~ s/$REG{WSP}+$//;        $body =~ s/$REG{WSP}+$//;
199        $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};        my ($s,undef,$value) = $self->_value_to_arrayitem
200        push @{$self->{field}}, {name => $name, body => $body};          ($name => $body, $self->{option});
201          push @{$self->{value}}, $value if $s;
202        } elsif (length $field) {
203          my ($s,undef,$value) = $self->_value_to_arrayitem
204            ('x-unknown' => $field, $self->{option});
205          push @{$self->{value}}, $value if $s;
206      }      }
207    }    }
208      $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
209    $self;    $self;
210  }  }
211    
212  =item Message::Header->parse_array (\@header, [%initial-fields/options])  =item $msg = Message::Header->parse_array (\@header, [%initial-fields/options])
213    
214  Parses given C<header> and constructs a new C<Message::Headers>  Parses given C<header> and constructs a new C<Message::Headers>
215  object.  Same as C<Message::Header-E<lt>parse> but this method  object.  Same as C<Message::Header-E<lt>parse> but this method
# Line 275  sub parse_array ($\@;%) { Line 228  sub parse_array ($\@;%) {
228    $self->_init (@_);    $self->_init (@_);
229    while (1) {    while (1) {
230      my $field = shift @$header;      my $field = shift @$header;
231      while (1) {      if ($self->{option}->{use_folding}) {
232        if ($$header[0] =~ /^$REG{WSP}/) {        while (1) {
233          $field .= shift @$header;          if ($$header[0] =~ /^$REG{WSP}/) {
234        } else {last}            $field .= shift @$header;
235            } else {last}
236          }
237        }
238        if ($self->{option}->{linebreak_strict}) {
239          $field =~ s/\x0D\x0A//g;
240        } else {
241          $field =~ tr/\x0D\x0A//d;
242      }      }
243      $field =~ tr/\x0D\x0A//d;   ## BUG: not safe for bar CR/LF      local $self->{option}->{parse} = $self->{option}->{parse_all};
244      if ($field =~ /$REG{M_fromline}/) {      if ($field =~ /$REG{M_fromline}/) {
245        my $body = $1;        my ($s,undef,$value) = $self->_value_to_arrayitem
246        $body = $self->_field_body ($body, 'mail-from')          ('mail-from' => $1, $self->{option});
247          if $self->{option}->{parse_all};        push @{$self->{value}}, $value if $s;
       push @{$self->{field}}, {name => 'mail-from', body => $body};  
248      } elsif ($field =~ /$REG{M_field}/) {      } elsif ($field =~ /$REG{M_field}/) {
249        my ($name, $body) = (lc $1, $2);        my ($name, $body) = ($self->_n11n_field_name ($1), $2);
       $name =~ s/$REG{WSP}+$//;  
250        $body =~ s/$REG{WSP}+$//;        $body =~ s/$REG{WSP}+$//;
251        $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};        my ($s,undef,$value) = $self->_value_to_arrayitem
252        push @{$self->{field}}, {name => $name, body => $body};          ($name => $body, $self->{option});
253          push @{$self->{value}}, $value if $s;
254        } elsif (length $field) {
255          my ($s,undef,$value) = $self->_value_to_arrayitem
256            ('x-unknown' => $field, $self->{option});
257          push @{$self->{value}}, $value if $s;
258      }      }
259      last if $#$header < 0;      last if $#$header < 0;
260    }    }
261      $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
262    $self;    $self;
263  }  }
264    
# Line 311  context, only first one is returned.) Line 275  context, only first one is returned.)
275    
276  =cut  =cut
277    
278  sub field ($$) {  sub field ($@) {shift->SUPER::item (@_)}
279    sub field_exist ($@) {shift->SUPER::item_exist (@_)}
280    
281    ## item-by?, \$checked-item, {item-key => 1}, \%option
282    sub _item_match ($$\$\%\%) {
283    my $self = shift;    my $self = shift;
284    my $name = lc shift;    my ($by, $i, $list, $option) = @_;
285    my @ret;    return 0 unless ref $$i;  ## Already removed
286    for my $field (@{$self->{field}}) {    if ($by eq 'name') {
287      if ($field->{name} eq $name) {      my %o = %$option; #$o{parse} = 0;
288        unless (wantarray) {      my %l;
289          $field->{body} = $self->_field_body ($field->{body}, $name);      for (keys %$list) {
290          return $field->{body};        my ($s, undef, $v) = $self->_value_to_arrayitem ($_, '', %o);
291          if ($s) {
292            $l{$v->{name} . ':' . ( $option->{ns} || $v->{ns} ) } = 1;
293        } else {        } else {
294          $field->{body} = $self->_field_body ($field->{body}, $name);          $l{$v->{name} .':'. ( $option->{ns} || $self->{option}->{ns_default_phuri} ) } = 1;
295          push @ret, $field->{body};        }
296        }
297        return 1 if $l{$$i->{name} . ':' . $$i->{ns}};
298      } elsif ($by eq 'ns') {
299        return 1 if $list->{ $$i->{ns} };
300      } elsif ($by eq 'http-ns-define') {
301        if ($$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
302         || $$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
303          my $n = $$i->{name};
304          if ($n eq 'opt' || $n eq 'c-opt' || $n eq 'man' || $n eq 'c-man') {
305            $option->{parse} = 0;
306            $$i->{body} = $self->_parse_value ($$i->{name} => $$i->{body}, ns => $$i->{ns});
307            for my $j (0..$$i->{body}->count-1) {
308              return 1 if $list->{ ($$i->{body}->value ($j))[0]->value };
309            }
310        }        }
311      }      }
312    }    }
313    if ($#ret < 0) {    0;
     return $self->add ($name);  
   }  
   @ret;  
314  }  }
315    *_delete_match = \&_item_match;
316    
317  sub field_exist ($$) {  ## Returns returned item value    \$item-value, \%option
318    my $self = shift;  sub _item_return_value ($\$\%) {
319    my $name = lc shift;    if (ref ${$_[1]}->{body}) {
320    my @ret;      ${$_[1]}->{body};
321    for my $field (@{$self->{field}}) {    } else {
322      return 1 if ($field->{name} eq $name);      ${$_[1]}->{body} = $_[0]->_parse_value (${$_[1]}->{name} => ${$_[1]}->{body},
323          ns => ${$_[1]}->{ns});
324        ${$_[1]}->{body};
325      }
326    }
327    *_add_return_value = \&_item_return_value;
328    *_replace_return_value = \&_item_return_value;
329    
330    ## Returns returned (new created) item value    $name, \%option
331    sub _item_new_value ($$\%) {
332      my $self = shift;
333      my ($name, $option) = @_;
334      if ($option->{by} eq 'http-ns-define') {
335        my $value = $self->_parse_value (opt => '', ns => $self->{ns}->{phname2uri}->{'x-http'});
336        ($value->value (0))[0]->value ($name);
337        {name => 'opt', body => $value, ns => $self->{ns}->{phname2uri}->{'x-http'}};
338      } else {
339        my ($s,undef,$value) = $self->_value_to_arrayitem
340            ($name => '', $option);
341        $s? $value: undef;
342    }    }
   0;  
343  }  }
344    
 =head2 $self->field_name ($index)  
   
 Returns C<field-name> of $index'th C<field>.  
   
 =head2 $self->field_body ($index)  
345    
 Returns C<field-body> of $index'th C<field>.  
346    
347  =cut  ## $self->_parse_value ($type, $value, %options);
348    sub _parse_value ($$$;%) {
349  sub field_name ($$) {    my $self = shift;
350    my $self = shift;    my $name = shift ;#|| $self->{option}->{_VALTYPE_DEFAULT};
351    $self->{field}->[shift]->{name};    my $value = shift;  return $value if ref $value;
352  }    my %option = @_;
353  sub field_body ($$) {    my $vtype; { no strict 'refs';
354    my $self = shift;      my $vt = ${&_NS_uri2phpackage ($option{ns}).'::OPTION'}{value_type};
355    my $i = shift;      if (ref $vt) {
356    $self->{field}->[$i]->{body}        $vtype = $vt->{$name} || $vt->{$self->{option}->{_VALTYPE_DEFAULT}};
357     = $self->_field_body ($self->{field}->[$i]->{body}, $self->{field}->[$i]->{name});      }
358    $self->{field}->[$i]->{body};      ## For compatiblity.
359  }      unless (ref $vtype) { $vtype = $self->{option}->{value_type}->{$name}
360          || $self->{option}->{value_type}->{$self->{option}->{_VALTYPE_DEFAULT}} }
361  sub _field_body ($$$) {    }
362    my $self = shift;    my $vpackage = $vtype->[0];
363    my ($body, $name) = @_;    my %vopt = %{$vtype->[1]} if ref $vtype->[1];
364    unless (ref $body) {    if ($vpackage eq ':none:') {
365      my $type = $self->{option}->{field_type}->{$name}      return $value;
366              || $self->{option}->{field_type}->{':DEFAULT'};    } elsif (defined $value) {
367      eval "require $type" or Carp::croak ("_field_body: $type: $@");      eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
368      unless ($body) {      return $vpackage->parse ($value,
369        $body = $type->new (-field_name => $name,        -format   => $self->{option}->{format},
370          -format => $self->{option}->{format}        -field_ns => $option{ns},
371          , field_name => $name, format => $self->{option}->{format});        -field_name       => $name,
372      } else {      -header_default_charset     => $self->{option}->{header_default_charset},
373        $body = $type->parse ($body, -field_name => $name,      -header_default_charset_input       => $self->{option}->{header_default_charset_input},
374          -format => $self->{option}->{format},        -parse_all        => $self->{option}->{parse_all},
375           field_name => $name,format => $self->{option}->{format});      %vopt);
376      }    } else {
377        eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
378        return $vpackage->new (
379          -format   => $self->{option}->{format},
380          -field_ns => $option{ns},
381          -field_name       => $name,
382        -header_default_charset     => $self->{option}->{header_default_charset},
383        -header_default_charset_input       => $self->{option}->{header_default_charset_input},
384          -parse_all        => $self->{option}->{parse_all},
385        %vopt);
386      }
387    }
388    
389    ## Defined for text/rfc822-headers
390    sub entity_header ($;$) {
391      my $self = shift;
392      my $new_header = shift;
393      if (ref $new_header) {
394        $self->{header} = $new_header;
395    }    }
396    $body;    $self->{header};
397  }  }
398    
399  =head2 $self->field_name_list ()  =head2 $self->field_name_list ()
# Line 394  returns ALL names.) Line 406  returns ALL names.)
406    
407  sub field_name_list ($) {  sub field_name_list ($) {
408    my $self = shift;    my $self = shift;
409    $self->_delete_empty_field ();    $self->_delete_empty ();
410    map {$_->{name}} @{$self->{field}};    map { $_->{name} . ':' . $_->{ns} } @{$self->{value}};
411    }
412    
413    sub namespace_ph_default ($;$) {
414      my $self = shift;
415      if (defined $_[0]) {
416        no strict 'refs';
417        $self->{option}->{ns_default_phuri} = $_[0];
418        $self->_ns_load_ph (${&_NS_uri2phpackage ($self->{option}->{ns_default_phuri}).'::OPTION'}{namespace_phname});
419      }
420      $self->{option}->{ns_default_phuri};
421  }  }
422    
423  =item $hdr->add ($field-name, $field-body, [$name, $body, ...])  =item $hdr->add ($field-name, $field-body, [$name, $body, ...])
# Line 421  C<-validate>: Checks whether C<field-nam Line 443  C<-validate>: Checks whether C<field-nam
443    
444  =cut  =cut
445    
446  sub add ($%) {  ## [Name: Value] pair -> internal array item
447    my $self = shift;  ## $self->_value_to_arrayitem ($name => $value, {%options})
448    my %fields = @_;  ## or
449    my %option = %{$self->{option}};  ## $self->_value_to_arrayitem ($name => [$value, %value_options], {%options})
450    $option{parse} = defined wantarray unless defined $option{parse};  ##
451    for (grep {/^-/} keys %fields) {$option{substr ($_, 1)} = $fields{$_}}  ## Return: ((1 = success / 0 = failue), $full_name, $arrayitem)
452    my $body;  sub _value_to_arrayitem ($$$\%) {
453    for (grep {/^[^-]/} keys %fields) {    my $self = shift;
454      my $name = lc $_;  $body = $fields{$_};    my ($name, $value, $option) = @_;
455      $name =~ tr/_/-/ if $option{translate_underscore};    my $value_option = {};
456      Carp::croak "add: $name: invalid field-name"    if (ref $value eq 'ARRAY') {
457        if $option{validate} && $name =~ /$REG{UNSAFE_field_name}/;      ($value, %$value_option) = @$value;
458      $body = $self->_field_body ($body, $name) if $option{parse};    }
459      if ($option{prepend}) {    my $nsuri = $self->{option}->{ns_default_phuri};
460        unshift @{$self->{field}}, {name => $name, body => $body};    $name =~ s/^$REG{WSP}+//;  $name =~ s/$REG{WSP}+$//;
461      } else {    
462        push @{$self->{field}}, {name => $name, body => $body};    no strict 'refs';
463      if ($value_option->{ns}) {
464        $nsuri = $value_option->{ns};
465      } elsif ($option->{ns}) {
466        $nsuri = $option->{ns};
467      } elsif (($option->{ns_default_phuri} eq $self->{ns}->{uri2phname}->{'x-http'}
468           && $name =~ s/^([0-9]+)-//)
469        || ($name =~ s/^x-http-([0-9]+)-//i)) {     ## Numric namespace prefix, RFC 2774
470        my $prefix = 0+$1;
471        $nsuri = $self->{ns}->{number2uri}->{ $prefix };
472        unless ($nsuri) {
473          $self->{ns}->{number2uri}->{ $prefix } = 'urn:x-suika-fam-cx:msgpm:header:x-temp:'.$prefix;
474          $nsuri = $self->{ns}->{number2uri}->{ $prefix };
475        }
476      } elsif (($name =~ s/^([Xx]-[A-Za-z]+|[A-YZa-yz][A-Za-z]*)-
477                           ([Xx]-[A-Za-z]+|[A-YZa-yz][A-Za-z]*)-//x)
478        || $name =~ s/^([Xx]-[A-Za-z]+|[A-Za-z]+)-//) {
479        my ($prefix1, $prefix2) = ($1, $2);
480        my $original_prefix = $&;  my $one_prefix = 0;
481        unless ($prefix2) {
482          $prefix2 = $prefix1;
483          $prefix1 = $self->{ns}->{uri2phname}->{ $option->{ns_default_phuri} };
484          $one_prefix = 1;
485        }
486        my $prefix
487          = &{ ${ &_NS_uri2phpackage ($nsuri).'::OPTION' }{n11n_prefix} }
488            ($self, &_NS_uri2phpackage ($nsuri), $prefix1.'-'.$prefix2);
489        $self->_ns_load_ph ($prefix);
490        $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
491        unless ($nsuri) {
492          $nsuri = $self->{option}->{ns_default_phuri};
493          $prefix
494            = &{ ${ &_NS_uri2phpackage ($nsuri).'::OPTION' }{n11n_prefix} }
495              ($self, &_NS_uri2phpackage ($nsuri), $one_prefix? $prefix2: $prefix1);
496          $self->_ns_load_ph ($prefix);
497          $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
498          if ($nsuri) {
499            $name = $prefix2 . '-' . $name unless $one_prefix;
500          } else {
501            $name = $original_prefix . $name;
502            $nsuri = $self->{option}->{ns_default_phuri};
503          }
504      }      }
505    }    }
506    $body if $option{parse};    $name
507        = &{${&_NS_uri2phpackage ($nsuri).'::OPTION'}{n11n_name}}
508          ($self, &_NS_uri2phpackage ($nsuri), $name);
509      Carp::croak "$name: invalid field-name"
510        if $option->{field_name_validation}
511          && $name =~ /$REG{$option->{field_name_unsafe_rule}}/;
512      $value = $self->_parse_value ($name => $value, ns => $nsuri)
513        if $$option{parse} || $$option{parse_all};
514      $$option{parse} = 0;
515      (1, $name.':'.$nsuri => {name => $name, body => $value, ns => $nsuri});
516  }  }
517    *_add_hash_check = \&_value_to_arrayitem;
518    *_replace_hash_check = \&_value_to_arrayitem;
519    
520  =head2 $self->relace ($field_name, $field_body)  =head2 $self->relace ($field_name, $field_body)
521    
# Line 453  first one is used and the others are not Line 527  first one is used and the others are not
527    
528  =cut  =cut
529    
530  sub replace ($%) {  sub _replace_hash_shift ($\%$\%) {
531    my $self = shift;    shift; my $r = shift;  my $n = $_[0]->{name} . ':' . $_[0]->{ns};
532    my %params = @_;    if ($$r{$n}) {
533    my %option = %{$self->{option}};      my $d = $$r{$n};
534    $option{parse} = defined wantarray unless defined $option{parse};      delete $$r{$n};
535    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}      return $d;
   my (%new_field);  
   for (grep {/^[^-]/} keys %params) {  
     my $name = lc $_;  
     $name =~ tr/_/-/ if $option{translate_underscore};  
     Carp::croak "replace: $name: invalid field-name"  
       if $option{validate} && $name =~ /$REG{UNSAFE_field_name}/;  
     $params{$_} = $self->_field_body ($params{$_}, $name) if $option{parse};  
     $new_field{$name} = $params{$_};  
   }  
   my $body = (%new_field)[-1];  
   for my $field (@{$self->{field}}) {  
     if (defined $new_field{$field->{name}}) {  
       $field->{body} = $new_field {$field->{name}};  
       $new_field{$field->{name}} = undef;  
     }  
536    }    }
537    for (keys %new_field) {    undef;
     push @{$self->{field}}, {name => $_, body => $new_field{$_}};  
   }  
   $body if $option{parse};  
538  }  }
539    
540  =head2 $self->delete ($field-name, [$name, ...])  =head2 $self->delete ($field-name, [$name, ...])
# Line 487  Deletes C<field> named as $field_name. Line 543  Deletes C<field> named as $field_name.
543    
544  =cut  =cut
545    
 sub delete ($@) {  
   my $self = shift;  
   my %delete;  for (@_) {$delete{lc $_} = 1}  
   for my $field (@{$self->{field}}) {  
     undef $field if $delete{$field->{name}};  
   }  
 }  
546    
547  =head2 $self->count ([$field_name])  =head2 $self->count ([$field_name])
548    
# Line 503  of fields.  (Same as $#$self+1) Line 552  of fields.  (Same as $#$self+1)
552    
553  =cut  =cut
554    
555  sub count ($;$) {  sub _count_by_name ($$\%) {
556    my $self = shift;    my $self = shift;
557    my ($name) = (lc shift);    my ($array, $option) = @_;
558    unless ($name) {    my $name = $self->_n11n_field_name ($$option{-name});
559      $self->_delete_empty_field ();    my @a = grep {$_->{name} eq $name} @{$self->{$array}};
560      return $#{$self->{field}}+1;    $#a + 1;
561    }  }
562    my $count = 0;  
563    for my $field (@{$self->{field}}) {  ## Delete empty items
564      if ($field->{name} eq $name) {  sub _delete_empty ($) {
565        $count++;    my $self = shift;
566      }    my $array = $self->{option}->{_HASH_NAME};
567    }    $self->{$array} = [grep {ref $_ && length $_->{name}} @{$self->{$array}}];
   $count;  
568  }  }
569    
570  =head2 $self->rename ($field-name, $new-name, [$old, $new,...])  =head2 $self->rename ($field-name, $new-name, [$old, $new,...])
# Line 532  sub rename ($%) { Line 580  sub rename ($%) {
580    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
581    my %new_name;    my %new_name;
582    for (grep {/^[^-]/} keys %params) {    for (grep {/^[^-]/} keys %params) {
583      my ($old => $new) = (lc $_ => lc $params{$_});      my ($old => $new)
584          = ($self->_n11n_field_name ($_) => $self->_n11n_field_name ($params{$_}));
585        $old =~ tr/_/-/ if $option{translate_underscore};
586      $new =~ tr/_/-/ if $option{translate_underscore};      $new =~ tr/_/-/ if $option{translate_underscore};
587      Carp::croak "rename: $new: invalid field-name"      Carp::croak "rename: $new: invalid field-name"
588        if $option{validate} && $new =~ /$REG{UNSAFE_field_name}/;        if $option{field_name_validation}
589            && $new =~ /$REG{$option{field_name_unsafe_rule}}/;
590      $new_name{$old} = $new;      $new_name{$old} = $new;
591    }    }
592    for my $field (@{$self->{field}}) {    for my $field (@{$self->{value}}) {
593      if (length $new_name{$field->{name}}) {      if (length $new_name{$field->{name}}) {
594        $field->{name} = $new_name{$field->{name}};        $field->{name} = $new_name{$field->{name}};
595      }      }
# Line 556  for each value. Line 607  for each value.
607    
608  =cut  =cut
609    
610  sub scan ($&) {  sub _scan_sort ($\@\%) {
611    my ($self, $sub) = @_;    my $self = shift;
612      my ($array, $option) = @_;
613    my $sort;    my $sort;
614    $sort = \&_header_cmp if $self->{option}->{sort} eq 'good-practice';    $sort = \&_header_cmp if $option->{field_sort} eq 'good-practice';
615    $sort = {$a cmp $b} if $self->{option}->{sort} eq 'alphabetic';    $sort = {$a cmp $b} if $option->{field_sort} eq 'alphabetic';
616    my @field = @{$self->{field}};    return ( sort $sort @$array ) if ref $sort;
617    if (ref $sort) {    @$array;
618      @field = sort $sort @{$self->{field}};  }
619    }  
620    for my $field (@field) {  sub _n11n_field_name ($$) {
621      next if $field->{name} =~ /^_/;    no strict 'refs';
622      &$sub($field->{name} => $field->{body});    my $self = shift;
623    }    my $s = shift;
624      $s =~ s/^$REG{WSP}+//; $s =~ s/$REG{WSP}+$//;
625      $s = lc $s unless ${&_NS_uri2phpackage ($self->{option}->{ns_default_phuri}).'::OPTION'}{case_sensible};
626      $s;
627  }  }
628    
629  # Compare function which makes it easy to sort headers in the  # Compare function which makes it easy to sort headers in the
# Line 596  sub stringify ($;%) { Line 651  sub stringify ($;%) {
651    my $self = shift;    my $self = shift;
652    my %params = @_;    my %params = @_;
653    my %option = %{$self->{option}};    my %option = %{$self->{option}};
654      $option{format} = $params{-format} if $params{-format};
655      $self->_init_by_format ($option{format}, \%option);
656    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
657    my @ret;    my @ret;
658    if ($option{mail_from}) {    ## RFC 2774 numerical field name prefix
659      my $fromline = $self->field ('mail-from');    my %nprefix;
660      push @ret, 'From '.$fromline if $fromline;    {no strict 'refs';
661    }      %nprefix = reverse %{ $self->{ns}->{number2uri} };
662    $self->scan (sub {      my $i = (sort { $a <=> $b } keys %{ $self->{ns}->{number2uri} })[-1] + 1;
663      my ($name, $body) = (@_);      $i = 10 if $i < 10;
664      return unless length $name;      my $hprefix = ${ &_NS_uri2phpackage
665      return if $option{mail_from} && $name eq 'mail-from';                         ($self->{ns}->{phname2uri}->{'x-http'})
666      return if !$option{output_bcc} && ($name eq 'bcc' || $name eq 'resent-bcc');                         .'::OPTION' } {namespace_phname_goodcase};
667      my $fbody;      for my $uri (keys %nprefix) {
668      if (ref $body) {        if ($nprefix{ $uri } < 10) {
669        $fbody = $body->stringify (-format => $option{format});          $nprefix{ $uri } = $i++;
670      } else {        }
671        $fbody = $body;        my $nsfs = $self->item ($uri, -by => 'http-ns-define');
672          for my $i (0..$nsfs->count-1) {
673            my $nsf = ($nsfs->value ($i))[0];
674            if ($nsf->value eq $uri) {
675              $nsf->replace (ns => $nprefix{ $uri });
676              $nprefix{ $uri } = $hprefix . '-' . $nprefix{ $uri };
677              last;
678            }
679          }
680      }      }
681      return unless length $fbody;    }
682      $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;    my $_stringify = sub {
683      $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;      no strict 'refs';
684      $name =~ s/((?:^|-)[a-z])/uc($1)/ge if $option{capitalize};        my ($name, $body, $nsuri) = ($_[1]->{name}, $_[1]->{body}, $_[1]->{ns});
685      push @ret, $name.': '.$self->fold ($fbody);        return unless length $name;
686    });        return if $option{output_mail_from} && $name eq 'mail-from';
687    my $ret = join ("\n", @ret);        $body = '' if !$option{output_bcc} && $name eq 'bcc';
688    $ret? $ret."\n": '';        my $nspackage = &_NS_uri2phpackage ($nsuri);
689          my $oname;        ## Outputed field-name
690          my $prefix = $nprefix{ $nsuri }
691                    || ${$nspackage.'::OPTION'} {namespace_phname_goodcase}
692                    || $self->{ns}->{uri2phname}->{ $nsuri };
693          my $default_prefix = ${ &_NS_uri2phpackage ($option{ns_default_phuri})
694                                  .'::OPTION'} {namespace_phname_goodcase};
695          $prefix = '' if $prefix eq $default_prefix;
696          $prefix =~ s/^\Q$default_prefix\E-//;
697          #$prefix = undef if $nsuri eq $option{ns_default_phuri};
698          #if ($prefix && $prefix eq $nprefix{ $nsuri }) {  ## RFC 2774 prefix
699          #  $prefix = ${ &_NS_uri2phpackage ($self->{ns}->{phname2uri}->{'x-http'})
700          #               .'::OPTION' } {namespace_phname_goodcase} . '-' . $prefix
701          #  unless $option{ns_default_phuri} eq $self->{ns}->{phname2uri}->{'x-http'};
702          #}
703          my $gc = ${$nspackage.'::OPTION'} {to_be_goodcase};
704          if (ref $gc) { $oname = &$gc ($self, $nspackage, $name, \%option) }
705          else { $oname = $name }
706          if ($prefix) { $oname = $prefix . '-' . $oname }
707          if ($option{format} =~ /uri-url-mailto/) {
708            return if (( ${$nspackage.'::OPTION'} {uri_mailto_safe}->{$name}
709                      || ${$nspackage.'::OPTION'} {uri_mailto_safe}->{':default'})
710                      < $option{uri_mailto_safe_level});
711            if ($name eq 'to') {
712              $body = $self->field ('to', -new_item_unless_exist => 0);
713              if (ref $body && $body->have_group) {
714                #
715              } elsif (ref $body && $body->count > 1) {
716                $body = $body->clone;
717                $body->delete ({-by => 'index'}, 0);
718              }
719            }
720          }
721          my $fbody;
722          if (ref $body) {
723            $fbody = $body->stringify (-format => $option{format});
724          } else {
725            $fbody = $body;
726          }
727          unless (${$nspackage.'::OPTION'} {field}->{$name}->{empty_body}) {
728            return unless length $fbody;
729          }
730          unless ($option{linebreak_strict}) {
731            ## bare \x0D and bare \x0A are unsafe
732            $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;
733            $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;
734          } else {
735            $fbody =~ s/\x0D\x0A(?=[^\x09\x20])/\x0D\x0A\x20/g;
736          }
737          if ($option{use_folding}) {
738            if (ref $option{output_folding}) {
739              $fbody = &{$option{output_folding}} ($self, $fbody,
740                -initial_length => length ($oname) +2);
741            } elsif ($option{output_folding}) {
742              $fbody = $self->_fold ($fbody, -initial_length => length ($oname) +2);
743            }
744          }
745          push @ret, sprintf $option{field_format_pattern}, $oname, $fbody;
746        };
747      if ($option{format} =~ /uri-url-mailto/) {
748        if ($option{format} =~ /uri-url-mailto-to/) {
749          my $to = $self->field ('to', -new_item_unless_exist => 0);
750          if ($to) {
751            unless ($to->have_group) {
752              my $fbody = $to->stringify (-format => $option{format}, -max => 1);
753              return &{$option{output_folding}} ($self, $fbody);
754            }
755          }
756          '';
757        } elsif ($option{format} =~ /uri-url-mailto-rfc1738/) {
758          my $to = $self->field ('to', -new_item_unless_exist => 0);
759          if ($to) {
760            my $fbody = $to->addr_spec (-format => $option{format});
761            return &{$option{output_folding}} ($self, $fbody);
762          }
763          '';
764        } else {
765          $self->scan ($_stringify);
766          my $ret = join ('&', @ret);
767          $ret;
768        }
769      } else {
770        if ($option{output_mail_from}) {
771          my $fromline = $self->field ('mail-from', -new_item_unless_exist => 0);
772          push @ret, 'From '.$fromline if $fromline;
773        }
774        $self->scan ($_stringify);
775        my $ret = join ("\x0D\x0A", @ret);
776        $ret? $ret."\x0D\x0A": '';
777      }
778  }  }
779  *as_string = \&stringify;  *as_string = \&stringify;
780    
# Line 636  sub option ($@) { Line 790  sub option ($@) {
790      return $self->{option}->{ shift (@_) };      return $self->{option}->{ shift (@_) };
791    }    }
792    while (my ($name, $value) = splice (@_, 0, 2)) {    while (my ($name, $value) = splice (@_, 0, 2)) {
     $name =~ s/^-//;  
793      $self->{option}->{$name} = $value;      $self->{option}->{$name} = $value;
794      if ($name eq 'format') {      if ($name eq 'format') {
795        for my $f (@{$self->{field}}) {        for my $f (@{$self->{field}}) {
# Line 648  sub option ($@) { Line 801  sub option ($@) {
801    }    }
802  }  }
803    
804  sub field_type ($$;$) {  sub field_type ($@) {shift->SUPER::value_type (@_)}
805    
806    ## $self->_fold ($string, %option = (-max, -initial_length(for field-name)) )
807    sub _fold ($$;%) {
808    my $self = shift;    my $self = shift;
809    my $field_name = shift;    my $string = shift;
810    my $new_field_type = shift;    my %option = @_;
811    if ($new_field_type) {    my $max = $self->{option}->{line_length_max};
812      $self->{option}->{field_type}->{$field_name} = $new_field_type;    $max = 20 if $max < 20;
813    }    
814    $self->{option}->{field_type}->{$field_name}    my $l = $option{-initial_length} || 0;
815    || $self->{option}->{field_type}->{':DEFAULT'};    $l += length $1 if $string =~ /^([^\x09\x20]+)/;
816      $string =~ s{([\x09\x20][^\x09\x20]+)}{
817        my $s = $1;
818        if (($l + length $s) > $max) {
819          $s = "\x0D\x0A\x20" . $s;
820          $l = 1 + length $s;
821        } else { $l += length $s }
822        $s;
823      }gex;
824      $string;
825  }  }
826    
827  sub _delete_empty_field ($) {  sub _ns_load_ph ($$) {
828    my $self = shift;    my $self = shift;
829    my @ret;    my $name = shift;     ## normalized prefix (without HYPHEN-MINUS)
830    for my $field (@{$self->{field}}) {    return if $self->{ns}->{phname2uri}->{$name};
831      push @ret, $field if $field->{name};    $self->{ns}->{phname2uri}->{$name} = $NS_phname2uri{$name};
832    }    return unless $self->{ns}->{phname2uri}->{$name};
833    $self->{field} = \@ret;    $self->{ns}->{uri2phname}->{$self->{ns}->{phname2uri}->{$name}} = $name;
834    $self;  }
835    
836    sub _ns_associate_numerical_prefix ($) {
837      my $self = shift;
838      $self->scan (sub {shift;
839        my $f = shift;  return unless $f->{name};
840        if ($f->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
841         || $f->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
842          my $fn = $f->{name};
843          if ($fn eq 'opt' || $fn eq 'man') {
844            $f->{body} = $self->_parse_value ($fn => $f->{body}, ns => $f->{ns});
845            for ($f->{body}->value (0..$f->{body}->count-1)) {
846              my ($nsuri, $number) = ($_->value, $_->item ('ns'));
847              if ($number && $nsuri) {
848                $self->{ns}->{number2uri}->{ $number } = $nsuri;
849              }
850            }
851          }
852        }
853      });
854      $self->scan (sub {shift;
855        my $f = shift;
856        if ($f->{ns} =~ /urn:x-suika-fam-cx:msgpm:header:x-temp:([0-9]+)$/ && $self->{ns}->{number2uri}->{ $1 }) {
857          $f->{ns} = $self->{ns}->{number2uri}->{ $1 };
858        }
859      });
860  }  }
861    
862  sub fold ($$;$) {  ## $package_name = Message::Header::_NS_uri2phpackage ($nsuri)
863    my $self = shift;  ## (For internal use of Message::* modules)
864    my $string = shift;  sub _NS_uri2phpackage ($) {
865    my $len = shift || $self->{option}->{fold_length};    $NS_uri2phpackage{$_[0]}
866    $len = 60 if $len < 60;    || $NS_uri2phpackage{$Message::Header::Default::OPTION{namespace_uri}};
     
   ## This code is taken from Mail::Header 1.43 in MailTools,  
   ## by Graham Barr (Maintained by Mark Overmeer <mailtools@overmeer.net>).  
   my $max = int($len - 5);         # 4 for leading spcs + 1 for [\,\;]  
   my $min = int($len * 4 / 5) - 4;  
   my $ml = $len;  
     
   if (length($string) > $ml) {  
      #Split the line up  
      # first bias towards splitting at a , or a ; >4/5 along the line  
      # next split a whitespace  
      # else we are looking at a single word and probably don't want to split  
      my $x = "";  
      $x .= "$1\n "  
        while($string =~ s/^$REG{WSP}*(  
                           [^"]{$min,$max}?[\,\;]  
                           |[^"]{1,$max}$REG{WSP}  
                           |[^\s"]*(?:"[^"]*"[^\s"]*)+$REG{WSP}  
                           |[^\s"]+$REG{WSP}  
                           )  
                         //x);  
      $x .= $string;  
      $string = $x;  
      $string =~ s/(\A$REG{WSP}+|$REG{WSP}+\Z)//sog;  
      $string =~ s/\s+\n/\n/sog;  
   }  
   $string;  
867  }  }
868    
869  =head2 $self->clone ()  =head2 $self->clone ()
# Line 709  Returns a copy of Message::Header object Line 872  Returns a copy of Message::Header object
872    
873  =cut  =cut
874    
875  sub clone ($) {  ## Inhreited
   my $self = shift;  
   my $clone = new Message::Header;  
   for my $name (%{$self->{option}}) {  
     if (ref $self->{option}->{$name} eq 'HASH') {  
       $clone->{option}->{$name} = {%{$self->{option}->{$name}}};  
     } elsif (ref $self->{option}->{$name} eq 'ARRAY') {  
       $clone->{option}->{$name} = [@{$self->{option}->{$name}}];  
     } else {  
       $clone->{option}->{$name} = $self->{option}->{$name};  
     }  
   }  
   for (@{$self->{field}}) {  
     $clone->add ($_->{name}, scalar $_->{body});  
   }  
   $clone;  
 }  
876    
877  =head1 NOTE  =head1 NOTE
878    
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