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revision 1.17 by wakaba, Sun Apr 21 04:28:46 2002 UTC revision 1.32 by wakaba, Sat Jul 6 11:37:01 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_uri2package;    ## namespace URI -> Package name
26  method.          our %NS_uri2phpackage;  ## namespace URI -> PH-Package name
27            require Message::Header::Default;       ## Default namespace
28  =head3 capitalize = 0/1  
29    ## Initialize of this class -- called by constructors
30  (First character of) C<field-name> is capitalized  %DEFAULT = (
31  when C<stringify>.  (Default = 1)      -_HASH_NAME => 'value',
32        -_METHODS   => [qw|field field_exist field_type add replace count delete subject id is|],
33  =head3 fold_length = numeric value      -_MEMBERS   => [qw|value|],
34        -_VALTYPE_DEFAULT   => ':default',
35  Length of line used to fold.  (Default = 70)      -by => 'name',
36        -field_format_pattern       => '%s: %s',
37  =head3 mail_from = 0/1      -field_name_case_sensible   => 0,
38        -field_name_unsafe_rule     => 'NON_ftext',
39  Outputs "From " line (known as Un*x From, Mail-From, and so on)      -field_name_validation      => 0,
40  when C<stringify>.  (Default = 0)      -field_sort => 0,
41        -format     => 'mail-rfc2822',
42  =cut      -header_default_charset     => 'iso-2022-int-1',
43        -header_default_charset_input       => 'iso-2022-int-1',
44  =head1 CONSTRUCTORS      -linebreak_strict   => 0,
45        -line_length_max    => 60,  ## For folding
46  The following methods construct new C<Message::Header> objects:      #ns_default_phuri
47        -output_bcc => 0,
48  =over 4      -output_folding     => 1,
49        -output_mail_from   => 0,
50  =cut      #parse_all
51        -translate_underscore       => 1,
52  ## Initialize      #uri_mailto_safe
53  my %DEFAULT = (      -uri_mailto_safe_level      => 4,
54    capitalize    => 1,      -use_folding        => 1,
55    fold  => 1,      #value_type
   fold_length   => 70,  
   field_format_pattern  => '%s: %s',  
   #field_type   => {},  
   format        => 'mail-rfc2822',  
   mail_from     => 0,  
   output_bcc    => 0,  
   parse_all     => 0,  
   sort  => 'none',  
   translate_underscore  => 1,  
   validate      => 1,  
56  );  );
 $DEFAULT{field_type} = {  
         ':DEFAULT'      => 'Message::Field::Unstructured',  
           
         received        => 'Message::Field::Received',  
         'x-received'    => 'Message::Field::Received',  
           
         'content-type'  => 'Message::Field::ContentType',  
         'auto-submitted'        => 'Message::Field::ValueParams',  
         'content-disposition'   => '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'}  
57    
58  ## taken from L<HTTP::Header>  ## taken from L<HTTP::Header>
59  # "Good Practice" order of HTTP message headers:  # "Good Practice" order of HTTP message headers:
# Line 172  my @header_order = qw( Line 85  my @header_order = qw(
85  );  );
86  my %header_order;  my %header_order;
87    
88    =head1 CONSTRUCTORS
89    
90    The following methods construct new C<Message::Header> objects:
91    
92    =over 4
93    
94    =cut
95    
96  sub _init ($;%) {  sub _init ($;%) {
97    my $self = shift;    my $self = shift;
98    my %options = @_;    my %options = @_;
99    $self->{field} = [];    my $DEFAULT = Message::Util::make_clone (\%DEFAULT);
100    $self->{option} = \%DEFAULT;    $self->SUPER::_init (%$DEFAULT, %options);
101      $self->{value} = [];
102      $self->_ns_load_ph ('default');
103      $self->_ns_load_ph ('x-rfc822');
104      $self->_ns_load_ph ('x-http');
105      $self->{option}->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'}
106        unless $self->{option}->{ns_default_phuri};
107      
108      ## For text/rfc822-headers
109      if (ref $options{entity_header}) {
110        $self->{entity_header} = $options{entity_header};
111        delete $options{entity_header};
112      }
113    my @new_fields = ();    my @new_fields = ();
114    for my $name (keys %options) {    for my $name (keys %options) {
115      if (substr ($name, 0, 1) eq '-') {      unless (substr ($name, 0, 1) eq '-') {
       $self->{option}->{substr ($name, 1)} = $options{$name};  
     } else {  
116        push @new_fields, ($name => $options{$name});        push @new_fields, ($name => $options{$name});
117      }      }
118    }    }
119    $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';  
     $self->{option}->{fold} = 0;  
   } elsif ($format =~ /^http/) {  
     $self->{option}->{sort} = 'good-practice';  
   }  
     
120    # Make alternative representations of @header_order.  This is used    # Make alternative representations of @header_order.  This is used
121    # for sorting.    # for sorting.
122    my $i = 1;    my $i = 1;
123    for (@header_order) {    for (@header_order) {
124        $header_order{$_} = $i++ unless $header_order{$_};        $header_order{$_} = $i++ unless $header_order{$_};
125    }    }
126      
127      $self->add (@new_fields, -parse => $self->{option}->{parse_all})
128        if $#new_fields > -1;
129    }
130    
131    sub _init_by_format ($$\%) {
132      my $self = shift;
133      my ($format, $option) = @_;
134      if ($format =~ /http/) {
135        $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-http'};
136        if ($format =~ /cgi/) {
137          unshift @header_order, qw(content-type location);
138          $option->{field_sort} = 'good-practice';
139          $option->{use_folding} = 0;
140        } else {
141          $option->{field_sort} = 'good-practice';
142        }
143      } else {      ## RFC 822
144        $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'};
145      }
146      if ($format =~ /uri-url-mailto/) {
147        $option->{output_bcc} = 0;
148        $option->{field_format_pattern} = '%s=%s';
149        $option->{output_folding} = sub {
150          $_[1] =~ s/([^:@+\$A-Za-z0-9\-_.!~*])/sprintf('%%%02X', ord $1)/ge;
151          $_[1];
152        };  ## Yes, this is not folding!
153      }
154  }  }
155    
156  =item Message::Header->new ([%initial-fields/options])  =item $msg = Message::Header->new ([%initial-fields/options])
157    
158  Constructs a new C<Message::Headers> object.  You might pass some initial  Constructs a new C<Message::Headers> object.  You might pass some initial
159  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 221  Example: Line 169  Example:
169    
170  =cut  =cut
171    
172  sub new ($;%) {  ## Inherited
   my $class = shift;  
   my $self = bless {}, $class;  
   $self->_init (@_);  
   $self;  
 }  
173    
174  =item Message::Header->parse ($header, [%initial-fields/options])  =item $msg = Message::Header->parse ($header, [%initial-fields/options])
175    
176  Parses given C<header> and constructs a new C<Message::Headers>  Parses given C<header> and constructs a new C<Message::Headers>
177  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 241  sub parse ($$;%) { Line 184  sub parse ($$;%) {
184    my $header = shift;    my $header = shift;
185    my $self = bless {}, $class;    my $self = bless {}, $class;
186    $self->_init (@_);    $self->_init (@_);
187    $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos;     ## unfold    if ($self->{option}->{linebreak_strict}) {
188        $header =~ s/\x0D\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
189      } else {
190        $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
191      }
192      my %option = (%{ $self->{option} });
193      $option{parse_all} = 0;
194    for my $field (split /\x0D?\x0A/, $header) {    for my $field (split /\x0D?\x0A/, $header) {
195      if ($field =~ /$REG{M_fromline}/) {      if ($field =~ /$REG{M_fromline}/) {
196        my $body = $1;        my ($s,undef,$value) = $self->_value_to_arrayitem
197        $body = $self->_field_body ($body, 'mail-from')          ('mail-from' => $1, \%option);
198          if $self->{option}->{parse_all};        push @{$self->{value}}, $value if $s;
       push @{$self->{field}}, {name => 'mail-from', body => $body};  
199      } elsif ($field =~ /$REG{M_field}/) {      } elsif ($field =~ /$REG{M_field}/) {
200        my ($name, $body) = (lc $1, $2);        my ($name, $body) = ($1, $2);
       $name =~ s/$REG{WSP}+$//;  
201        $body =~ s/$REG{WSP}+$//;        $body =~ s/$REG{WSP}+$//;
202        $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};        my ($s,undef,$value) = $self->_value_to_arrayitem
203        push @{$self->{field}}, {name => $name, body => $body};          ($name => $body, \%option);
204      }        push @{$self->{value}}, $value if $s;
205        } elsif (length $field) {
206          my ($s,undef,$value) = $self->_value_to_arrayitem
207            ('x-unknown' => $field, \%option);
208          push @{$self->{value}}, $value if $s;
209        }
210      }
211      $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
212      for (@{ $self->{value} }) {
213        no strict 'refs';
214        $_->{name}
215          = &{ ${ &_NS_uri2package ($_->{ns}).'::OPTION' }{n11n_name} }
216          ($self, &_NS_uri2package ($_->{ns}), $_->{name});
217        $_->{body} = $self->_parse_value ($_->{name} => $_->{body}, ns => $_->{ns})
218          if $self->{option}->{parse_all};
219    }    }
220    $self;    $self;
221  }  }
222    
223  =item Message::Header->parse_array (\@header, [%initial-fields/options])  =item $msg = Message::Header->parse_array (\@header, [%initial-fields/options])
224    
225  Parses given C<header> and constructs a new C<Message::Headers>  Parses given C<header> and constructs a new C<Message::Headers>
226  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 278  sub parse_array ($\@;%) { Line 239  sub parse_array ($\@;%) {
239    $self->_init (@_);    $self->_init (@_);
240    while (1) {    while (1) {
241      my $field = shift @$header;      my $field = shift @$header;
242      while (1) {      if ($self->{option}->{use_folding}) {
243        if ($$header[0] =~ /^$REG{WSP}/) {        while (1) {
244          $field .= shift @$header;          if ($$header[0] =~ /^$REG{WSP}/) {
245        } else {last}            $field .= shift @$header;
246            } else {last}
247          }
248        }
249        if ($self->{option}->{linebreak_strict}) {
250          $field =~ s/\x0D\x0A//g;
251        } else {
252          $field =~ tr/\x0D\x0A//d;
253      }      }
254      $field =~ tr/\x0D\x0A//d;   ## BUG: not safe for bar CR/LF      local $self->{option}->{parse} = $self->{option}->{parse_all};
255      if ($field =~ /$REG{M_fromline}/) {      if ($field =~ /$REG{M_fromline}/) {
256        my $body = $1;        my ($s,undef,$value) = $self->_value_to_arrayitem
257        $body = $self->_field_body ($body, 'mail-from')          ('mail-from' => $1, $self->{option});
258          if $self->{option}->{parse_all};        push @{$self->{value}}, $value if $s;
       push @{$self->{field}}, {name => 'mail-from', body => $body};  
259      } elsif ($field =~ /$REG{M_field}/) {      } elsif ($field =~ /$REG{M_field}/) {
260        my ($name, $body) = (lc $1, $2);        my ($name, $body) = ($self->_n11n_field_name ($1), $2);
       $name =~ s/$REG{WSP}+$//;  
261        $body =~ s/$REG{WSP}+$//;        $body =~ s/$REG{WSP}+$//;
262        $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};        my ($s,undef,$value) = $self->_value_to_arrayitem
263        push @{$self->{field}}, {name => $name, body => $body};          ($name => $body, $self->{option});
264          push @{$self->{value}}, $value if $s;
265        } elsif (length $field) {
266          my ($s,undef,$value) = $self->_value_to_arrayitem
267            ('x-unknown' => $field, $self->{option});
268          push @{$self->{value}}, $value if $s;
269      }      }
270      last if $#$header < 0;      last if $#$header < 0;
271    }    }
272      $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
273    $self;    $self;
274  }  }
275    
# Line 314  context, only first one is returned.) Line 286  context, only first one is returned.)
286    
287  =cut  =cut
288    
289  sub field ($$) {  sub field ($@) {shift->SUPER::item (@_)}
290    sub field_exist ($@) {shift->SUPER::item_exist (@_)}
291    
292    ## item-by?, \$checked-item, {item-key => 1}, \%option
293    sub _item_match ($$\$\%\%) {
294    my $self = shift;    my $self = shift;
295    my $name = lc shift;    my ($by, $i, $list, $option) = @_;
296    my @ret;    return 0 unless ref $$i;  ## Already removed
297    for my $field (@{$self->{field}}) {    if ($by eq 'name') {
298      if ($field->{name} eq $name) {      my %o = %$option; #$o{parse} = 0;
299        unless (wantarray) {      my %l;
300          $field->{body} = $self->_field_body ($field->{body}, $name);      for (keys %$list) {
301          return $field->{body};        my ($s, undef, $v) = $self->_value_to_arrayitem ($_, '', %o);
302          if ($s) {
303            $l{$v->{name} . ':' . ( $option->{ns} || $v->{ns} ) } = 1;
304        } else {        } else {
305          $field->{body} = $self->_field_body ($field->{body}, $name);          $l{$v->{name} .':'. ( $option->{ns} || $self->{option}->{ns_default_phuri} ) } = 1;
306          push @ret, $field->{body};        }
307        }
308        return 1 if $l{$$i->{name} . ':' . $$i->{ns}};
309      } elsif ($by eq 'ns') {
310        return 1 if $list->{ $$i->{ns} };
311      } elsif ($by eq 'http-ns-define') {
312        if ($$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
313         || $$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
314          my $n = $$i->{name};
315          if ($n eq 'opt' || $n eq 'c-opt' || $n eq 'man' || $n eq 'c-man') {
316            $option->{parse} = 0;
317            $$i->{body} = $self->_parse_value ($$i->{name} => $$i->{body}, ns => $$i->{ns});
318            for my $j (0..$$i->{body}->count-1) {
319              return 1 if $list->{ ($$i->{body}->value ($j))[0]->value };
320            }
321        }        }
322      }      }
323    }    }
324    if ($#ret < 0) {    0;
     return $self->add ($name);  
   }  
   @ret;  
325  }  }
326    *_delete_match = \&_item_match;
327    
328  sub field_exist ($$) {  ## Returns returned item value    \$item-value, \%option
329    my $self = shift;  sub _item_return_value ($\$\%) {
330    my $name = lc shift;    if (ref ${$_[1]}->{body}) {
331    my @ret;      ${$_[1]}->{body};
332    for my $field (@{$self->{field}}) {    } else {
333      return 1 if ($field->{name} eq $name);      ${$_[1]}->{body} = $_[0]->_parse_value (${$_[1]}->{name} => ${$_[1]}->{body},
334          ns => ${$_[1]}->{ns});
335        ${$_[1]}->{body};
336      }
337    }
338    *_add_return_value = \&_item_return_value;
339    *_replace_return_value = \&_item_return_value;
340    
341    ## Returns returned (new created) item value    $name, \%option
342    sub _item_new_value ($$\%) {
343      my $self = shift;
344      my ($name, $option) = @_;
345      if ($option->{by} eq 'http-ns-define') {
346        my $value = $self->_parse_value (opt => '', ns => $self->{ns}->{phname2uri}->{'x-http'});
347        ($value->value (0))[0]->value ($name);
348        {name => 'opt', body => $value, ns => $self->{ns}->{phname2uri}->{'x-http'}};
349      } else {
350        my ($s,undef,$value) = $self->_value_to_arrayitem
351            ($name => '', $option);
352        $s? $value: undef;
353    }    }
   0;  
354  }  }
355    
 =head2 $self->field_name ($index)  
   
 Returns C<field-name> of $index'th C<field>.  
   
 =head2 $self->field_body ($index)  
356    
 Returns C<field-body> of $index'th C<field>.  
357    
358  =cut  ## $self->_parse_value ($type, $value, %options);
359    sub _parse_value ($$$;%) {
360  sub field_name ($$) {    my $self = shift;
361    my $self = shift;    my $name = shift ;#|| $self->{option}->{_VALTYPE_DEFAULT};
362    $self->{field}->[shift]->{name};    my $value = shift;  return $value if ref $value;
363  }    my %option = @_;
364  sub field_body ($$) {    my $vtype; { no strict 'refs';
365    my $self = shift;      my $vt = ${&_NS_uri2package ($option{ns}).'::OPTION'}{value_type};
366    my $i = shift;      if (ref $vt) {
367    $self->{field}->[$i]->{body}        $vtype = $vt->{$name} || $vt->{$self->{option}->{_VALTYPE_DEFAULT}};
368     = $self->_field_body ($self->{field}->[$i]->{body}, $self->{field}->[$i]->{name});      }
369    $self->{field}->[$i]->{body};      ## For compatiblity.
370  }      unless (ref $vtype) { $vtype = $self->{option}->{value_type}->{$name}
371          || $self->{option}->{value_type}->{$self->{option}->{_VALTYPE_DEFAULT}} }
372  sub _field_body ($$$) {    }
373    my $self = shift;    my $vpackage = $vtype->[0];
374    my ($body, $name) = @_;    my %vopt = %{$vtype->[1]} if ref $vtype->[1];
375    unless (ref $body) {    if ($vpackage eq ':none:') {
376      my $type = $self->{option}->{field_type}->{$name}      return $value;
377              || $self->{option}->{field_type}->{':DEFAULT'};    } elsif (defined $value) {
378      eval "require $type" or Carp::croak ("_field_body: $type: $@");      eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
379      unless ($body) {      return $vpackage->parse ($value,
380        $body = $type->new (-field_name => $name,        -format   => $self->{option}->{format},
381          -format => $self->{option}->{format}        -field_ns => $option{ns},
382          , field_name => $name, format => $self->{option}->{format});        -field_name       => $name,
383      } else {      -header_default_charset     => $self->{option}->{header_default_charset},
384        $body = $type->parse ($body, -field_name => $name,      -header_default_charset_input       => $self->{option}->{header_default_charset_input},
385          -format => $self->{option}->{format},        -parse_all        => $self->{option}->{parse_all},
386           field_name => $name,format => $self->{option}->{format});      %vopt);
387      }    } else {
388        eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
389        return $vpackage->new (
390          -format   => $self->{option}->{format},
391          -field_ns => $option{ns},
392          -field_name       => $name,
393        -header_default_charset     => $self->{option}->{header_default_charset},
394        -header_default_charset_input       => $self->{option}->{header_default_charset_input},
395          -parse_all        => $self->{option}->{parse_all},
396        %vopt);
397      }
398    }
399    
400    ## Defined for text/rfc822-headers
401    sub entity_header ($;$) {
402      my $self = shift;
403      my $new_header = shift;
404      if (ref $new_header) {
405        $self->{header} = $new_header;
406    }    }
407    $body;    $self->{header};
408  }  }
409    
410  =head2 $self->field_name_list ()  =head2 $self->field_name_list ()
# Line 397  returns ALL names.) Line 417  returns ALL names.)
417    
418  sub field_name_list ($) {  sub field_name_list ($) {
419    my $self = shift;    my $self = shift;
420    $self->_delete_empty_field ();    $self->_delete_empty ();
421    map {$_->{name}} @{$self->{field}};    map { $_->{name} . ':' . $_->{ns} } @{$self->{value}};
422    }
423    
424    sub namespace_ph_default ($;$) {
425      my $self = shift;
426      if (defined $_[0]) {
427        no strict 'refs';
428        $self->{option}->{ns_default_phuri} = $_[0];
429        $self->_ns_load_ph (${&_NS_uri2package ($self->{option}->{ns_default_phuri}).'::OPTION'}{namespace_phname});
430      }
431      $self->{option}->{ns_default_phuri};
432  }  }
433    
434  =item $hdr->add ($field-name, $field-body, [$name, $body, ...])  =item $hdr->add ($field-name, $field-body, [$name, $body, ...])
# Line 424  C<-validate>: Checks whether C<field-nam Line 454  C<-validate>: Checks whether C<field-nam
454    
455  =cut  =cut
456    
457  sub add ($%) {  ## [Name: Value] pair -> internal array item
458    my $self = shift;  ## $self->_value_to_arrayitem ($name => $value, {%options})
459    my %fields = @_;  ## or
460    my %option = %{$self->{option}};  ## $self->_value_to_arrayitem ($name => [$value, %value_options], {%options})
461    $option{parse} = defined wantarray unless defined $option{parse};  ##
462    for (grep {/^-/} keys %fields) {$option{substr ($_, 1)} = $fields{$_}}  ## Return: ((1 = success / 0 = failue), $full_name, $arrayitem)
463    my $body;  sub _value_to_arrayitem ($$$\%) {
464    for (grep {/^[^-]/} keys %fields) {    my $self = shift;
465      my $name = lc $_;  $body = $fields{$_};    my ($name, $value, $option) = @_;
466      $name =~ tr/_/-/ if $option{translate_underscore};    my $value_option = {};
467      Carp::croak "add: $name: invalid field-name"    if (ref $value eq 'ARRAY') {
468        if $option{validate} && $name =~ /$REG{UNSAFE_field_name}/;      ($value, %$value_option) = @$value;
469      $body = $self->_field_body ($body, $name) if $option{parse};    }
470      if ($option{prepend}) {    my $nsuri = $self->{option}->{ns_default_phuri};
471        unshift @{$self->{field}}, {name => $name, body => $body};    $name =~ s/^$REG{WSP}+//;  $name =~ s/$REG{WSP}+$//;
472      } else {    
473        push @{$self->{field}}, {name => $name, body => $body};    no strict 'refs';
474      if ($value_option->{ns}) {
475        $nsuri = $value_option->{ns};
476      } elsif ($option->{ns}) {
477        $nsuri = $option->{ns};
478      } elsif (($option->{ns_default_phuri} eq $self->{ns}->{uri2phname}->{'x-http'}
479           && $name =~ s/^([0-9]+)-//)
480        || ($name =~ s/^x-http-([0-9]+)-//i)) {     ## Numric namespace prefix, RFC 2774
481        my $prefix = 0+$1;
482        $nsuri = $self->{ns}->{number2uri}->{ $prefix };
483        unless ($nsuri) {
484          $self->{ns}->{number2uri}->{ $prefix } = 'urn:x-suika-fam-cx:msgpm:header:x-temp:'.$prefix;
485          $nsuri = $self->{ns}->{number2uri}->{ $prefix };
486        }
487      } elsif (($name =~ s/^([Xx]-[A-Za-z]+|[A-YZa-yz][A-Za-z]*)-
488                           ([Xx]-[A-Za-z]+|[A-YZa-yz][A-Za-z]*)-//x)
489        || $name =~ s/^([Xx]-[A-Za-z]+|[A-Za-z]+)-//) {
490        my ($prefix1, $prefix2) = ($1, $2);
491        my $original_prefix = $&;  my $one_prefix = 0;
492        unless ($prefix2) {
493          $prefix2 = $prefix1;
494          $prefix1 = $self->{ns}->{uri2phname}->{ $option->{ns_default_phuri} };
495          $one_prefix = 1;
496        }
497        my $prefix
498          = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_prefix} }
499            ($self, &_NS_uri2package ($nsuri), $prefix1.'-'.$prefix2);
500        $self->_ns_load_ph ($prefix);
501        $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
502        unless ($nsuri) {
503          $nsuri = $self->{option}->{ns_default_phuri};
504          $prefix
505            = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_prefix} }
506              ($self, &_NS_uri2package ($nsuri), $one_prefix? $prefix2: $prefix1);
507          $self->_ns_load_ph ($prefix);
508          $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
509          if ($nsuri) {
510            $name = $prefix2 . '-' . $name unless $one_prefix;
511          } else {
512            $name = $original_prefix . $name;
513            $nsuri = $self->{option}->{ns_default_phuri};
514          }
515      }      }
516    }    }
517    $body if $option{parse};    $name
518        = &{${&_NS_uri2package ($nsuri).'::OPTION'}{n11n_name}}
519          ($self, &_NS_uri2package ($nsuri), $name);
520      Carp::croak "$name: invalid field-name"
521        if $option->{field_name_validation}
522          && $name =~ /$REG{$option->{field_name_unsafe_rule}}/;
523      $value = $self->_parse_value ($name => $value, ns => $nsuri)
524        if $$option{parse} || $$option{parse_all};
525      $$option{parse} = 0;
526      (1, $name.':'.$nsuri => {name => $name, body => $value, ns => $nsuri});
527  }  }
528    *_add_hash_check = \&_value_to_arrayitem;
529    *_replace_hash_check = \&_value_to_arrayitem;
530    
531  =head2 $self->relace ($field_name, $field_body)  =head2 $self->relace ($field_name, $field_body)
532    
# Line 456  first one is used and the others are not Line 538  first one is used and the others are not
538    
539  =cut  =cut
540    
541  sub replace ($%) {  sub _replace_hash_shift ($\%$\%) {
542    my $self = shift;    shift; my $r = shift;  my $n = $_[0]->{name} . ':' . $_[0]->{ns};
543    my %params = @_;    if ($$r{$n}) {
544    my %option = %{$self->{option}};      my $d = $$r{$n};
545    $option{parse} = defined wantarray unless defined $option{parse};      delete $$r{$n};
546    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}      return $d;
   my (%new_field);  
   for (grep {/^[^-]/} keys %params) {  
     my $name = lc $_;  
     $name =~ tr/_/-/ if $option{translate_underscore};  
     Carp::croak "replace: $name: invalid field-name"  
       if $option{validate} && $name =~ /$REG{UNSAFE_field_name}/;  
     $params{$_} = $self->_field_body ($params{$_}, $name) if $option{parse};  
     $new_field{$name} = $params{$_};  
   }  
   my $body = (%new_field)[-1];  
   for my $field (@{$self->{field}}) {  
     if (defined $new_field{$field->{name}}) {  
       $field->{body} = $new_field {$field->{name}};  
       $new_field{$field->{name}} = undef;  
     }  
547    }    }
548    for (keys %new_field) {    undef;
     push @{$self->{field}}, {name => $_, body => $new_field{$_}};  
   }  
   $body if $option{parse};  
549  }  }
550    
551  =head2 $self->delete ($field-name, [$name, ...])  =head2 $self->delete ($field-name, [$name, ...])
# Line 490  Deletes C<field> named as $field_name. Line 554  Deletes C<field> named as $field_name.
554    
555  =cut  =cut
556    
 sub delete ($@) {  
   my $self = shift;  
   my %delete;  for (@_) {$delete{lc $_} = 1}  
   for my $field (@{$self->{field}}) {  
     undef $field if $delete{$field->{name}};  
   }  
 }  
557    
558  =head2 $self->count ([$field_name])  =head2 $self->count ([$field_name])
559    
# Line 506  of fields.  (Same as $#$self+1) Line 563  of fields.  (Same as $#$self+1)
563    
564  =cut  =cut
565    
566  sub count ($;$) {  sub _count_by_name ($$\%) {
567    my $self = shift;    my $self = shift;
568    my ($name) = (lc shift);    my ($array, $option) = @_;
569    unless ($name) {    my $name = $self->_n11n_field_name ($$option{-name});
570      $self->_delete_empty_field ();    my @a = grep {$_->{name} eq $name} @{$self->{$array}};
571      return $#{$self->{field}}+1;    $#a + 1;
572    }  }
573    my $count = 0;  
574    for my $field (@{$self->{field}}) {  ## Delete empty items
575      if ($field->{name} eq $name) {  sub _delete_empty ($) {
576        $count++;    my $self = shift;
577      }    my $array = $self->{option}->{_HASH_NAME};
578    }    $self->{$array} = [grep {ref $_ && length $_->{name}} @{$self->{$array}}];
   $count;  
579  }  }
580    
581  =head2 $self->rename ($field-name, $new-name, [$old, $new,...])  =head2 $self->rename ($field-name, $new-name, [$old, $new,...])
# Line 535  sub rename ($%) { Line 591  sub rename ($%) {
591    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
592    my %new_name;    my %new_name;
593    for (grep {/^[^-]/} keys %params) {    for (grep {/^[^-]/} keys %params) {
594      my ($old => $new) = (lc $_ => lc $params{$_});      my ($old => $new)
595          = ($self->_n11n_field_name ($_) => $self->_n11n_field_name ($params{$_}));
596        $old =~ tr/_/-/ if $option{translate_underscore};
597      $new =~ tr/_/-/ if $option{translate_underscore};      $new =~ tr/_/-/ if $option{translate_underscore};
598      Carp::croak "rename: $new: invalid field-name"      Carp::croak "rename: $new: invalid field-name"
599        if $option{validate} && $new =~ /$REG{UNSAFE_field_name}/;        if $option{field_name_validation}
600            && $new =~ /$REG{$option{field_name_unsafe_rule}}/;
601      $new_name{$old} = $new;      $new_name{$old} = $new;
602    }    }
603    for my $field (@{$self->{field}}) {    for my $field (@{$self->{value}}) {
604      if (length $new_name{$field->{name}}) {      if (length $new_name{$field->{name}}) {
605        $field->{name} = $new_name{$field->{name}};        $field->{name} = $new_name{$field->{name}};
606      }      }
# Line 559  for each value. Line 618  for each value.
618    
619  =cut  =cut
620    
621  sub scan ($&) {  sub _scan_sort ($\@\%) {
622    my ($self, $sub) = @_;    my $self = shift;
623      my ($array, $option) = @_;
624    my $sort;    my $sort;
625    $sort = \&_header_cmp if $self->{option}->{sort} eq 'good-practice';    $sort = \&_header_cmp if $option->{field_sort} eq 'good-practice';
626    $sort = {$a cmp $b} if $self->{option}->{sort} eq 'alphabetic';    $sort = {$a cmp $b} if $option->{field_sort} eq 'alphabetic';
627    my @field = @{$self->{field}};    return ( sort $sort @$array ) if ref $sort;
628    if (ref $sort) {    @$array;
629      @field = sort $sort @{$self->{field}};  }
630    }  
631    for my $field (@field) {  sub _n11n_field_name ($$) {
632      next if $field->{name} =~ /^_/;    no strict 'refs';
633      &$sub($field->{name} => $field->{body});    my $self = shift;
634    }    my $s = shift;
635      $s =~ s/^$REG{WSP}+//; $s =~ s/$REG{WSP}+$//;
636      $s = lc $s unless ${&_NS_uri2package ($self->{option}->{ns_default_phuri}).'::OPTION'}{case_sensible};
637      $s;
638  }  }
639    
640  # Compare function which makes it easy to sort headers in the  # Compare function which makes it easy to sort headers in the
# Line 599  sub stringify ($;%) { Line 662  sub stringify ($;%) {
662    my $self = shift;    my $self = shift;
663    my %params = @_;    my %params = @_;
664    my %option = %{$self->{option}};    my %option = %{$self->{option}};
665      $option{format} = $params{-format} if $params{-format};
666      $self->_init_by_format ($option{format}, \%option);
667    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
668    my @ret;    my @ret;
669    if ($option{mail_from}) {    ## RFC 2774 numerical field name prefix
670      my $fromline = $self->field ('mail-from');    my %nprefix;
671      push @ret, 'From '.$fromline if $fromline;    {no strict 'refs';
672    }      %nprefix = reverse %{ $self->{ns}->{number2uri} };
673    $self->scan (sub {      my $i = (sort { $a <=> $b } keys %{ $self->{ns}->{number2uri} })[-1] + 1;
674      my ($name, $body) = (@_);      $i = 10 if $i < 10;
675      return unless length $name;      my $hprefix = ${ &_NS_uri2package
676      return if $option{mail_from} && $name eq 'mail-from';                         ($self->{ns}->{phname2uri}->{'x-http'})
677      return if !$option{output_bcc} && ($name eq 'bcc' || $name eq 'resent-bcc');                         .'::OPTION' } {namespace_phname_goodcase};
678      my $fbody;      for my $uri (keys %nprefix) {
679      if (ref $body) {        if ($nprefix{ $uri } < 10) {
680        $fbody = $body->stringify (-format => $option{format});          $nprefix{ $uri } = $i++;
681      } else {        }
682        $fbody = $body;        my $nsfs = $self->item ($uri, -by => 'http-ns-define');
683          for my $i (0..$nsfs->count-1) {
684            my $nsf = ($nsfs->value ($i))[0];
685            if ($nsf->value eq $uri) {
686              $nsf->replace (ns => $nprefix{ $uri });
687              $nprefix{ $uri } = $hprefix . '-' . $nprefix{ $uri };
688              last;
689            }
690          }
691      }      }
692      return unless length $fbody;    }
693      $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;    my $_stringify = sub {
694      $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;      no strict 'refs';
695      $name =~ s/((?:^|-)[a-z])/uc($1)/ge if $option{capitalize};        my ($name, $body, $nsuri) = ($_[1]->{name}, $_[1]->{body}, $_[1]->{ns});
696      $fbody = $self->_fold ($fbody) if $self->{option}->{fold};        return unless length $name;
697      push @ret, sprintf $self->{option}->{field_format_pattern}, $name, $fbody;        return if $option{output_mail_from} && $name eq 'mail-from';
698    });        $body = '' if !$option{output_bcc} && $name eq 'bcc';
699    my $ret = join ("\n", @ret);        my $nspackage = &_NS_uri2package ($nsuri);
700    $ret? $ret."\n": '';        my $oname;        ## Outputed field-name
701          my $prefix = $nprefix{ $nsuri }
702                    || ${$nspackage.'::OPTION'} {namespace_phname_goodcase}
703                    || $self->{ns}->{uri2phname}->{ $nsuri };
704          my $default_prefix = ${ &_NS_uri2package ($option{ns_default_phuri})
705                                  .'::OPTION'} {namespace_phname_goodcase};
706          $prefix = '' if $prefix eq $default_prefix;
707          $prefix =~ s/^\Q$default_prefix\E-//;
708          my $gc = ${$nspackage.'::OPTION'} {to_be_goodcase};
709          if (ref $gc) { $oname = &$gc ($self, $nspackage, $name, \%option) }
710          else { $oname = $name }
711          if ($prefix) { $oname = $prefix . '-' . $oname }
712          if ($option{format} =~ /uri-url-mailto/) {
713            return if (( ${$nspackage.'::OPTION'} {uri_mailto_safe}->{$name}
714                      || ${$nspackage.'::OPTION'} {uri_mailto_safe}->{':default'})
715                      < $option{uri_mailto_safe_level});
716            if ($name eq 'to') {
717              $body = $self->field ('to', -new_item_unless_exist => 0);
718              if (ref $body && $body->have_group) {
719                #
720              } elsif (ref $body && $body->count > 1) {
721                $body = $body->clone;
722                $body->delete ({-by => 'index'}, 0);
723              }
724            }
725          }
726          my $fbody;
727          if (ref $body) {
728            $fbody = $body->stringify (-format => $option{format});
729          } else {
730            $fbody = $body;
731          }
732          unless (${$nspackage.'::OPTION'} {field}->{$name}->{empty_body}) {
733            return unless length $fbody;
734          }
735          unless ($option{linebreak_strict}) {
736            ## bare \x0D and bare \x0A are unsafe
737            $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;
738            $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;
739          } else {
740            $fbody =~ s/\x0D\x0A(?=[^\x09\x20])/\x0D\x0A\x20/g;
741          }
742          if ($option{use_folding}) {
743            if (ref $option{output_folding}) {
744              $fbody = &{$option{output_folding}} ($self, $fbody,
745                -initial_length => length ($oname) +2);
746            } elsif ($option{output_folding}) {
747              $fbody = $self->_fold ($fbody, -initial_length => length ($oname) +2);
748            }
749          }
750          push @ret, sprintf $option{field_format_pattern}, $oname, $fbody;
751        };
752      if ($option{format} =~ /uri-url-mailto/) {
753        if ($option{format} =~ /uri-url-mailto-to/) {
754          my $to = $self->field ('to', -new_item_unless_exist => 0);
755          if ($to) {
756            unless ($to->have_group) {
757              my $fbody = $to->stringify (-format => $option{format}, -max => 1);
758              return &{$option{output_folding}} ($self, $fbody);
759            }
760          }
761          '';
762        } elsif ($option{format} =~ /uri-url-mailto-rfc1738/) {
763          my $to = $self->field ('to', -new_item_unless_exist => 0);
764          if ($to) {
765            my $fbody = $to->addr_spec (-format => $option{format});
766            return &{$option{output_folding}} ($self, $fbody);
767          }
768          '';
769        } else {
770          $self->scan ($_stringify);
771          my $ret = join ('&', @ret);
772          $ret;
773        }
774      } else {
775        if ($option{output_mail_from}) {
776          my $fromline = $self->field ('mail-from', -new_item_unless_exist => 0);
777          push @ret, 'From '.$fromline if $fromline;
778        }
779        $self->scan ($_stringify);
780        my $ret = join ("\x0D\x0A", @ret);
781        $ret? $ret."\x0D\x0A": '';
782      }
783  }  }
784  *as_string = \&stringify;  *as_string = \&stringify;
785    
# Line 640  sub option ($@) { Line 795  sub option ($@) {
795      return $self->{option}->{ shift (@_) };      return $self->{option}->{ shift (@_) };
796    }    }
797    while (my ($name, $value) = splice (@_, 0, 2)) {    while (my ($name, $value) = splice (@_, 0, 2)) {
     $name =~ s/^-//;  
798      $self->{option}->{$name} = $value;      $self->{option}->{$name} = $value;
799      if ($name eq 'format') {      if ($name eq 'format') {
800        for my $f (@{$self->{field}}) {        for my $f (@{$self->{field}}) {
# Line 652  sub option ($@) { Line 806  sub option ($@) {
806    }    }
807  }  }
808    
809  sub field_type ($$;$) {  sub field_type ($@) {shift->SUPER::value_type (@_)}
810    
811    ## $self->_fold ($string, %option = (-max, -initial_length(for field-name)) )
812    sub _fold ($$;%) {
813    my $self = shift;    my $self = shift;
814    my $field_name = shift;    my $string = shift;
815    my $new_field_type = shift;    my %option = @_;
816    if ($new_field_type) {    my $max = $self->{option}->{line_length_max};
817      $self->{option}->{field_type}->{$field_name} = $new_field_type;    $max = 20 if $max < 20;
818    }    
819    $self->{option}->{field_type}->{$field_name}    my $l = $option{-initial_length} || 0;
820    || $self->{option}->{field_type}->{':DEFAULT'};    $l += length $1 if $string =~ /^([^\x09\x20]+)/;
821      $string =~ s{([\x09\x20][^\x09\x20]+)}{
822        my $s = $1;
823        if (($l + length $s) > $max) {
824          $s = "\x0D\x0A\x20" . $s;
825          $l = 1 + length $s;
826        } else { $l += length $s }
827        $s;
828      }gex;
829      $string;
830  }  }
831    
832  sub _delete_empty_field ($) {  sub _ns_load_ph ($$) {
833    my $self = shift;    my $self = shift;
834    my @ret;    my $name = shift;     ## normalized prefix (without HYPHEN-MINUS)
835    for my $field (@{$self->{field}}) {    return if $self->{ns}->{phname2uri}->{$name};
836      push @ret, $field if $field->{name};    $self->{ns}->{phname2uri}->{$name} = $NS_phname2uri{$name};
837    }    return unless $self->{ns}->{phname2uri}->{$name};
838    $self->{field} = \@ret;    $self->{ns}->{uri2phname}->{$self->{ns}->{phname2uri}->{$name}} = $name;
839    $self;  }
840    
841    sub _ns_associate_numerical_prefix ($) {
842      my $self = shift;
843      $self->scan (sub {shift;
844        my $f = shift;  return unless $f->{name};
845        if ($f->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
846         || $f->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
847          my $fn = $f->{name};
848          if ($fn eq 'opt' || $fn eq 'man') {
849            $f->{body} = $self->_parse_value ($fn => $f->{body}, ns => $f->{ns});
850            for ($f->{body}->value (0..$f->{body}->count-1)) {
851              my ($nsuri, $number) = ($_->value, $_->item ('ns'));
852              if ($number && $nsuri) {
853                $self->{ns}->{number2uri}->{ $number } = $nsuri;
854              }
855            }
856          }
857        }
858      });
859      $self->scan (sub {shift;
860        my $f = shift;
861        if ($f->{ns} =~ /urn:x-suika-fam-cx:msgpm:header:x-temp:([0-9]+)$/ && $self->{ns}->{number2uri}->{ $1 }) {
862          $f->{ns} = $self->{ns}->{number2uri}->{ $1 };
863        }
864      });
865  }  }
866    
867  sub _fold ($$;$) {  ## $package_name = Message::Header::_NS_uri2phpackage ($nsuri)
868    my $self = shift;  ## (For internal use of Message::* modules)
869    my $string = shift;  sub _NS_uri2phpackage ($) {
870    my $len = shift || $self->{option}->{fold_length};    $NS_uri2phpackage{$_[0]}
871    $len = 60 if $len < 60;    || $NS_uri2phpackage{$Message::Header::Default::OPTION{namespace_uri}};
872      }
873    ## This code is taken from Mail::Header 1.43 in MailTools,  sub _NS_uri2package ($) {
874    ## by Graham Barr (Maintained by Mark Overmeer <mailtools@overmeer.net>).    $NS_uri2package{$_[0]}
875    my $max = int($len - 5);         # 4 for leading spcs + 1 for [\,\;]    || $NS_uri2phpackage{$_[0]}
876    my $min = int($len * 4 / 5) - 4;    || $NS_uri2phpackage{$Message::Header::Default::OPTION{namespace_uri}};
   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;  
877  }  }
878    
879  =head2 $self->clone ()  =head2 $self->clone ()
# Line 713  Returns a copy of Message::Header object Line 882  Returns a copy of Message::Header object
882    
883  =cut  =cut
884    
885  sub clone ($) {  ## 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;  
 }  
886    
887  =head1 NOTE  =head1 NOTE
888    
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