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revision 1.17 by wakaba, Sun Apr 21 04:28:46 2002 UTC revision 1.35 by wakaba, Mon Jul 8 12:39:39 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      -hook_init_fill_options     => sub {},
45        -hook_stringify_fill_fields => sub {},
46  The following methods construct new C<Message::Header> objects:      -linebreak_strict   => 0,
47        -line_length_max    => 60,  ## For folding
48  =over 4      #ns_default_phuri
49        -output_bcc => 0,
50  =cut      -output_folding     => 1,
51        -output_mail_from   => 0,
52  ## Initialize      #parse_all
53  my %DEFAULT = (      -translate_underscore       => 1,
54    capitalize    => 1,      #uri_mailto_safe
55    fold  => 1,      -uri_mailto_safe_level      => 4,
56    fold_length   => 70,      -use_folding        => 1,
57    field_format_pattern  => '%s: %s',      #value_type
   #field_type   => {},  
   format        => 'mail-rfc2822',  
   mail_from     => 0,  
   output_bcc    => 0,  
   parse_all     => 0,  
   sort  => 'none',  
   translate_underscore  => 1,  
   validate      => 1,  
58  );  );
 $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'}  
59    
60  ## taken from L<HTTP::Header>  ## taken from L<HTTP::Header>
61  # "Good Practice" order of HTTP message headers:  # "Good Practice" order of HTTP message headers:
# Line 172  my @header_order = qw( Line 87  my @header_order = qw(
87  );  );
88  my %header_order;  my %header_order;
89    
90    =head1 CONSTRUCTORS
91    
92    The following methods construct new C<Message::Header> objects:
93    
94    =over 4
95    
96    =cut
97    
98  sub _init ($;%) {  sub _init ($;%) {
99    my $self = shift;    my $self = shift;
100    my %options = @_;    my %options = @_;
101    $self->{field} = [];    my $DEFAULT = Message::Util::make_clone (\%DEFAULT);
102    $self->{option} = \%DEFAULT;    $self->SUPER::_init (%$DEFAULT, %options);
103      $self->{value} = [];
104      $self->_ns_load_ph ('default');
105      $self->_ns_load_ph ('x-rfc822');
106      $self->_ns_load_ph ('x-http');
107      $self->{option}->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'}
108        unless $self->{option}->{ns_default_phuri};
109      
110      ## For text/rfc822-headers
111      if (ref $options{entity_header}) {
112        $self->{entity_header} = $options{entity_header};
113        delete $options{entity_header};
114      }
115    my @new_fields = ();    my @new_fields = ();
116    for my $name (keys %options) {    for my $name (keys %options) {
117      if (substr ($name, 0, 1) eq '-') {      unless (substr ($name, 0, 1) eq '-') {
       $self->{option}->{substr ($name, 1)} = $options{$name};  
     } else {  
118        push @new_fields, ($name => $options{$name});        push @new_fields, ($name => $options{$name});
119      }      }
120    }    }
121    $self->add (@new_fields, -parse => $self->{option}->{parse_all})    &{ $self->{option}->{hook_init_fill_options} } ($self, $self->{option});
122      if $#new_fields > -1;    $self->_init_by_format ($self->{option}->{format}, $self->{option});
     
   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';  
   }  
     
123    # Make alternative representations of @header_order.  This is used    # Make alternative representations of @header_order.  This is used
124    # for sorting.    # for sorting.
125    my $i = 1;    my $i = 1;
126    for (@header_order) {    for (@header_order) {
127        $header_order{$_} = $i++ unless $header_order{$_};        $header_order{$_} = $i++ unless $header_order{$_};
128    }    }
129      
130      $self->add (@new_fields, -parse => $self->{option}->{parse_all})
131        if $#new_fields > -1;
132    }
133    
134    sub _init_by_format ($$\%) {
135      my $self = shift;
136      my ($format, $option) = @_;
137      return if $format eq $option->{format};
138      if ($format =~ /http/) {
139        $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-http'};
140        if ($format =~ /cgi/) {
141          unshift @header_order, qw(content-type location);
142          $option->{field_sort} = 'good-practice';
143          $option->{use_folding} = 0;
144        } else {
145          $option->{field_sort} = 'good-practice';
146        }
147      } elsif ($format =~ /mail|news/) {    ## RFC 822
148        $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'};
149      }
150      if ($format =~ /uri-url-mailto/) {
151        $option->{output_bcc} = 0;
152        $option->{field_format_pattern} = '%s=%s';
153        $option->{output_folding} = sub {
154          $_[1] =~ s/([^:@+\$A-Za-z0-9\-_.!~*])/sprintf('%%%02X', ord $1)/ge;
155          $_[1];
156        };  ## Yes, this is not folding!
157      }
158  }  }
159    
160  =item Message::Header->new ([%initial-fields/options])  =item $msg = Message::Header->new ([%initial-fields/options])
161    
162  Constructs a new C<Message::Headers> object.  You might pass some initial  Constructs a new C<Message::Headers> object.  You might pass some initial
163  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 173  Example:
173    
174  =cut  =cut
175    
176  sub new ($;%) {  ## Inherited
   my $class = shift;  
   my $self = bless {}, $class;  
   $self->_init (@_);  
   $self;  
 }  
177    
178  =item Message::Header->parse ($header, [%initial-fields/options])  =item $msg = Message::Header->parse ($header, [%initial-fields/options])
179    
180  Parses given C<header> and constructs a new C<Message::Headers>  Parses given C<header> and constructs a new C<Message::Headers>
181  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 188  sub parse ($$;%) {
188    my $header = shift;    my $header = shift;
189    my $self = bless {}, $class;    my $self = bless {}, $class;
190    $self->_init (@_);    $self->_init (@_);
191    $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos;     ## unfold    if ($self->{option}->{linebreak_strict}) {
192        $header =~ s/\x0D\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
193      } else {
194        $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
195      }
196      my %option = (%{ $self->{option} });
197      $option{parse_all} = 0;
198    for my $field (split /\x0D?\x0A/, $header) {    for my $field (split /\x0D?\x0A/, $header) {
199      if ($field =~ /$REG{M_fromline}/) {      if ($field =~ /$REG{M_fromline}/) {
200        my $body = $1;        my ($s,undef,$value) = $self->_value_to_arrayitem
201        $body = $self->_field_body ($body, 'mail-from')          ('mail-from' => $1, \%option);
202          if $self->{option}->{parse_all};        push @{$self->{value}}, $value if $s;
       push @{$self->{field}}, {name => 'mail-from', body => $body};  
203      } elsif ($field =~ /$REG{M_field}/) {      } elsif ($field =~ /$REG{M_field}/) {
204        my ($name, $body) = (lc $1, $2);        my ($name, $body) = ($1, $2);
       $name =~ s/$REG{WSP}+$//;  
205        $body =~ s/$REG{WSP}+$//;        $body =~ s/$REG{WSP}+$//;
206        $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};        my ($s,undef,$value) = $self->_value_to_arrayitem
207        push @{$self->{field}}, {name => $name, body => $body};          ($name => $body, \%option);
208      }        push @{$self->{value}}, $value if $s;
209        } elsif (length $field) {
210          my ($s,undef,$value) = $self->_value_to_arrayitem
211            ('x-unknown' => $field, \%option);
212          push @{$self->{value}}, $value if $s;
213        }
214      }
215      $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
216      for (@{ $self->{value} }) {
217        no strict 'refs';
218        $_->{name}
219          = &{ ${ &_NS_uri2package ($_->{ns}).'::OPTION' }{n11n_name} }
220          ($self, &_NS_uri2package ($_->{ns}), $_->{name});
221        $_->{body} = $self->_parse_value ($_->{name} => $_->{body}, ns => $_->{ns})
222          if $self->{option}->{parse_all};
223    }    }
224    $self;    $self;
225  }  }
226    
227  =item Message::Header->parse_array (\@header, [%initial-fields/options])  =item $msg = Message::Header->parse_array (\@header, [%initial-fields/options])
228    
229  Parses given C<header> and constructs a new C<Message::Headers>  Parses given C<header> and constructs a new C<Message::Headers>
230  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 243  sub parse_array ($\@;%) {
243    $self->_init (@_);    $self->_init (@_);
244    while (1) {    while (1) {
245      my $field = shift @$header;      my $field = shift @$header;
246      while (1) {      if ($self->{option}->{use_folding}) {
247        if ($$header[0] =~ /^$REG{WSP}/) {        while (1) {
248          $field .= shift @$header;          if ($$header[0] =~ /^$REG{WSP}/) {
249        } else {last}            $field .= shift @$header;
250            } else {last}
251          }
252      }      }
253      $field =~ tr/\x0D\x0A//d;   ## BUG: not safe for bar CR/LF      if ($self->{option}->{linebreak_strict}) {
254          $field =~ s/\x0D\x0A//g;
255        } else {
256          $field =~ tr/\x0D\x0A//d;
257        }
258        local $self->{option}->{parse} = $self->{option}->{parse_all};
259      if ($field =~ /$REG{M_fromline}/) {      if ($field =~ /$REG{M_fromline}/) {
260        my $body = $1;        my ($s,undef,$value) = $self->_value_to_arrayitem
261        $body = $self->_field_body ($body, 'mail-from')          ('mail-from' => $1, $self->{option});
262          if $self->{option}->{parse_all};        push @{$self->{value}}, $value if $s;
       push @{$self->{field}}, {name => 'mail-from', body => $body};  
263      } elsif ($field =~ /$REG{M_field}/) {      } elsif ($field =~ /$REG{M_field}/) {
264        my ($name, $body) = (lc $1, $2);        my ($name, $body) = ($self->_n11n_field_name ($1), $2);
       $name =~ s/$REG{WSP}+$//;  
265        $body =~ s/$REG{WSP}+$//;        $body =~ s/$REG{WSP}+$//;
266        $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};        my ($s,undef,$value) = $self->_value_to_arrayitem
267        push @{$self->{field}}, {name => $name, body => $body};          ($name => $body, $self->{option});
268          push @{$self->{value}}, $value if $s;
269        } elsif (length $field) {
270          my ($s,undef,$value) = $self->_value_to_arrayitem
271            ('x-unknown' => $field, $self->{option});
272          push @{$self->{value}}, $value if $s;
273      }      }
274      last if $#$header < 0;      last if $#$header < 0;
275    }    }
276      $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
277    $self;    $self;
278  }  }
279    
# Line 314  context, only first one is returned.) Line 290  context, only first one is returned.)
290    
291  =cut  =cut
292    
293  sub field ($$) {  sub field ($@) {shift->SUPER::item (@_)}
294    sub field_exist ($@) {shift->SUPER::item_exist (@_)}
295    
296    ## item-by?, \$checked-item, {item-key => 1}, \%option
297    sub _item_match ($$\$\%\%) {
298    my $self = shift;    my $self = shift;
299    my $name = lc shift;    my ($by, $i, $list, $option) = @_;
300    my @ret;    return 0 unless ref $$i;  ## Already removed
301    for my $field (@{$self->{field}}) {    if ($by eq 'name') {
302      if ($field->{name} eq $name) {      my %o = %$option; #$o{parse} = 0;
303        unless (wantarray) {      my %l;
304          $field->{body} = $self->_field_body ($field->{body}, $name);      for (keys %$list) {
305          return $field->{body};        my ($s, undef, $v) = $self->_value_to_arrayitem ($_, '', \%o);
306          if ($s) {
307            $l{$v->{name} . ':' . ( $option->{ns} || $v->{ns} ) } = 1;
308        } else {        } else {
309          $field->{body} = $self->_field_body ($field->{body}, $name);          $l{$v->{name} .':'. ( $option->{ns} || $self->{option}->{ns_default_phuri} ) } = 1;
310          push @ret, $field->{body};        }
311        }
312        return 1 if $l{$$i->{name} . ':' . $$i->{ns}};
313      } elsif ($by eq 'ns') {
314        return 1 if $list->{ $$i->{ns} };
315      } elsif ($by eq 'http-ns-define') {
316        if ($$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
317         || $$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
318          my $n = $$i->{name};
319          if ($n eq 'opt' || $n eq 'c-opt' || $n eq 'man' || $n eq 'c-man') {
320            $option->{parse} = 0;
321            $$i->{body} = $self->_parse_value ($$i->{name} => $$i->{body}, ns => $$i->{ns});
322            for my $j (0..$$i->{body}->count-1) {
323              return 1 if $list->{ ($$i->{body}->value ($j))[0]->value };
324            }
325        }        }
326      }      }
327    }    }
328    if ($#ret < 0) {    0;
     return $self->add ($name);  
   }  
   @ret;  
329  }  }
330    *_delete_match = \&_item_match;
331    
332  sub field_exist ($$) {  ## Returns returned item value    \$item-value, \%option
333    my $self = shift;  sub _item_return_value ($\$\%) {
334    my $name = lc shift;    if (ref ${$_[1]}->{body}) {
335    my @ret;      ${$_[1]}->{body};
336    for my $field (@{$self->{field}}) {    } else {
337      return 1 if ($field->{name} eq $name);      ${$_[1]}->{body} = $_[0]->_parse_value (${$_[1]}->{name} => ${$_[1]}->{body},
338          ns => ${$_[1]}->{ns});
339        ${$_[1]}->{body};
340      }
341    }
342    *_add_return_value = \&_item_return_value;
343    *_replace_return_value = \&_item_return_value;
344    
345    ## Returns returned (new created) item value    $name, \%option
346    sub _item_new_value ($$\%) {
347      my $self = shift;
348      my ($name, $option) = @_;
349      if ($option->{by} eq 'http-ns-define') {
350        my $value = $self->_parse_value (opt => '', ns => $self->{ns}->{phname2uri}->{'x-http'});
351        ($value->value (0))[0]->value ($name);
352        {name => 'opt', body => $value, ns => $self->{ns}->{phname2uri}->{'x-http'}};
353      } else {
354        my ($s,undef,$value) = $self->_value_to_arrayitem
355            ($name => '', $option);
356        $s? $value: undef;
357    }    }
   0;  
358  }  }
359    
 =head2 $self->field_name ($index)  
   
 Returns C<field-name> of $index'th C<field>.  
360    
 =head2 $self->field_body ($index)  
361    
362  Returns C<field-body> of $index'th C<field>.  ## $self->_parse_value ($type, $value, %options);
363    sub _parse_value ($$$;%) {
364  =cut    my $self = shift;
365      my $name = shift ;#|| $self->{option}->{_VALTYPE_DEFAULT};
366  sub field_name ($$) {    my $value = shift;  return $value if ref $value;
367    my $self = shift;    my %option = @_;
368    $self->{field}->[shift]->{name};    my $vtype; { no strict 'refs';
369  }      my $vt = ${&_NS_uri2package ($option{ns}).'::OPTION'}{value_type};
370  sub field_body ($$) {      if (ref $vt) {
371    my $self = shift;        $vtype = $vt->{$name} || $vt->{$self->{option}->{_VALTYPE_DEFAULT}};
372    my $i = shift;      }
373    $self->{field}->[$i]->{body}      ## For compatiblity.
374     = $self->_field_body ($self->{field}->[$i]->{body}, $self->{field}->[$i]->{name});      unless (ref $vtype) { $vtype = $self->{option}->{value_type}->{$name}
375    $self->{field}->[$i]->{body};        || $self->{option}->{value_type}->{$self->{option}->{_VALTYPE_DEFAULT}} }
376  }    }
377      my $vpackage = $vtype->[0];
378  sub _field_body ($$$) {    my %vopt = %{$vtype->[1]} if ref $vtype->[1];
379    my $self = shift;    if ($vpackage eq ':none:') {
380    my ($body, $name) = @_;      return $value;
381    unless (ref $body) {    } elsif (defined $value) {
382      my $type = $self->{option}->{field_type}->{$name}      eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
383              || $self->{option}->{field_type}->{':DEFAULT'};      return $vpackage->parse ($value,
384      eval "require $type" or Carp::croak ("_field_body: $type: $@");        -format   => $self->{option}->{format},
385      unless ($body) {        -field_ns => $option{ns},
386        $body = $type->new (-field_name => $name,        -field_name       => $name,
387          -format => $self->{option}->{format}      -header_default_charset     => $self->{option}->{header_default_charset},
388          , field_name => $name, format => $self->{option}->{format});      -header_default_charset_input       => $self->{option}->{header_default_charset_input},
389      } else {        -parse_all        => $self->{option}->{parse_all},
390        $body = $type->parse ($body, -field_name => $name,      %vopt);
391          -format => $self->{option}->{format},    } else {
392           field_name => $name,format => $self->{option}->{format});      eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
393      }      return $vpackage->new (
394          -format   => $self->{option}->{format},
395          -field_ns => $option{ns},
396          -field_name       => $name,
397        -header_default_charset     => $self->{option}->{header_default_charset},
398        -header_default_charset_input       => $self->{option}->{header_default_charset_input},
399          -parse_all        => $self->{option}->{parse_all},
400        %vopt);
401      }
402    }
403    
404    ## Defined for text/rfc822-headers
405    sub entity_header ($;$) {
406      my $self = shift;
407      my $new_header = shift;
408      if (ref $new_header) {
409        $self->{header} = $new_header;
410    }    }
411    $body;    $self->{header};
412  }  }
413    
414  =head2 $self->field_name_list ()  =head2 $self->field_name_list ()
# Line 397  returns ALL names.) Line 421  returns ALL names.)
421    
422  sub field_name_list ($) {  sub field_name_list ($) {
423    my $self = shift;    my $self = shift;
424    $self->_delete_empty_field ();    $self->_delete_empty ();
425    map {$_->{name}} @{$self->{field}};    map { $_->{name} . ':' . $_->{ns} } @{$self->{value}};
426    }
427    
428    sub namespace_ph_default ($;$) {
429      my $self = shift;
430      if (defined $_[0]) {
431        no strict 'refs';
432        $self->{option}->{ns_default_phuri} = $_[0];
433        $self->_ns_load_ph (${&_NS_uri2package ($self->{option}->{ns_default_phuri}).'::OPTION'}{namespace_phname});
434      }
435      $self->{option}->{ns_default_phuri};
436  }  }
437    
438  =item $hdr->add ($field-name, $field-body, [$name, $body, ...])  =item $hdr->add ($field-name, $field-body, [$name, $body, ...])
# Line 424  C<-validate>: Checks whether C<field-nam Line 458  C<-validate>: Checks whether C<field-nam
458    
459  =cut  =cut
460    
461  sub add ($%) {  ## [Name: Value] pair -> internal array item
462    my $self = shift;  ## $self->_value_to_arrayitem ($name => $value, {%options})
463    my %fields = @_;  ## or
464    my %option = %{$self->{option}};  ## $self->_value_to_arrayitem ($name => [$value, %value_options], {%options})
465    $option{parse} = defined wantarray unless defined $option{parse};  ##
466    for (grep {/^-/} keys %fields) {$option{substr ($_, 1)} = $fields{$_}}  ## Return: ((1 = success / 0 = failue), $full_name, $arrayitem)
467    my $body;  sub _value_to_arrayitem ($$$\%) {
468    for (grep {/^[^-]/} keys %fields) {    my $self = shift;
469      my $name = lc $_;  $body = $fields{$_};    my ($name, $value, $option) = @_;
470      $name =~ tr/_/-/ if $option{translate_underscore};    my $value_option = {};
471      Carp::croak "add: $name: invalid field-name"    if (ref $value eq 'ARRAY') {
472        if $option{validate} && $name =~ /$REG{UNSAFE_field_name}/;      ($value, %$value_option) = @$value;
473      $body = $self->_field_body ($body, $name) if $option{parse};    }
474      if ($option{prepend}) {    my $default_ns = $option->{ns_default_phuri};
475        unshift @{$self->{field}}, {name => $name, body => $body};    my $nsuri = $default_ns;
476      } else {    $name =~ s/^$REG{WSP}+//;  $name =~ s/$REG{WSP}+$//;
477        push @{$self->{field}}, {name => $name, body => $body};    
478      no strict 'refs';
479      if ($value_option->{ns}) {
480        $nsuri = $value_option->{ns};
481      } elsif ($option->{ns}) {
482        $nsuri = $option->{ns};
483      } elsif (($default_ns eq $self->{ns}->{uri2phname}->{'x-http'}
484           && $name =~ s/^([0-9]+)-//)
485        || ($name =~ s/^x-http-([0-9]+)-//i)) {     ## Numric namespace prefix, RFC 2774
486        my $prefix = 0+$1;
487        $nsuri = $self->{ns}->{number2uri}->{ $prefix };
488        unless ($nsuri) {
489          $self->{ns}->{number2uri}->{ $prefix } = 'urn:x-suika-fam-cx:msgpm:header:x-temp:'.$prefix;
490          $nsuri = $self->{ns}->{number2uri}->{ $prefix };
491        }
492      } elsif (
493        ${ &_NS_uri2package ($default_ns).'::OPTION' }{use_ph_namespace}
494        && (
495           ($name =~ s/^([Xx]-[A-Za-z0-9]+|[A-Za-z]*[A-WYZa-wyz0-9][A-Za-z0-9]*)-
496                        ([Xx]-[A-Za-z0-9]+|[A-Za-z0-9]*[A-WYZa-wyz0-9][A-Za-z0-9]*)-//x)
497         || $name =~ s/^([Xx]-[A-Za-z0-9]+|[A-Za-z0-9]*[A-WYZa-wyz0-9][A-Za-z0-9]*)-//
498        )) {
499        my ($prefix1, $prefix2) = ($1, $2);
500        my $original_prefix = $&;  my $one_prefix = 0;
501        unless ($prefix2) {
502          $prefix2 = $prefix1;
503          $prefix1 = $self->{ns}->{uri2phname}->{ $default_ns };
504          $one_prefix = 1;
505        }
506        my $prefix
507          = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_prefix} }
508            ($self, &_NS_uri2package ($nsuri), $prefix1.'-'.$prefix2);
509        $self->_ns_load_ph ($prefix);
510        $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
511        unless ($nsuri) {
512          $nsuri = $default_ns;
513          $prefix
514            = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_prefix} }
515              ($self, &_NS_uri2package ($nsuri), $one_prefix? $prefix2: $prefix1);
516          $self->_ns_load_ph ($prefix);
517          $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
518          if ($nsuri) {
519            $name = $prefix2 . '-' . $name unless $one_prefix;
520          } else {
521            $name = $original_prefix . $name;
522            $nsuri = $default_ns;
523          }
524      }      }
525    }    }
526    $body if $option{parse};    $name
527        = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_name} }
528          ($self, &_NS_uri2package ($nsuri), $name);
529      Carp::croak "$name: invalid field-name"
530        if $option->{field_name_validation}
531          && $name =~ /$REG{ $option->{field_name_unsafe_rule} }/;
532      $value = $self->_parse_value ($name => $value, ns => $nsuri)
533        if $option->{parse} || $option->{parse_all};
534      $option->{parse} = 0;
535      (1, $name.':'.$nsuri => {name => $name, body => $value, ns => $nsuri});
536  }  }
537    *_add_hash_check = \&_value_to_arrayitem;
538    *_replace_hash_check = \&_value_to_arrayitem;
539    
540  =head2 $self->relace ($field_name, $field_body)  =head2 $self->relace ($field_name, $field_body)
541    
# Line 456  first one is used and the others are not Line 547  first one is used and the others are not
547    
548  =cut  =cut
549    
550  sub replace ($%) {  sub _replace_hash_shift ($\%$\%) {
551    my $self = shift;    shift; my $r = shift;  my $n = $_[0]->{name} . ':' . $_[0]->{ns};
552    my %params = @_;    if ($$r{$n}) {
553    my %option = %{$self->{option}};      my $d = $$r{$n};
554    $option{parse} = defined wantarray unless defined $option{parse};      delete $$r{$n};
555    for (grep {/^-/} keys %params) {$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;  
     }  
556    }    }
557    for (keys %new_field) {    undef;
     push @{$self->{field}}, {name => $_, body => $new_field{$_}};  
   }  
   $body if $option{parse};  
558  }  }
559    
560  =head2 $self->delete ($field-name, [$name, ...])  =head2 $self->delete ($field-name, [$name, ...])
# Line 490  Deletes C<field> named as $field_name. Line 563  Deletes C<field> named as $field_name.
563    
564  =cut  =cut
565    
 sub delete ($@) {  
   my $self = shift;  
   my %delete;  for (@_) {$delete{lc $_} = 1}  
   for my $field (@{$self->{field}}) {  
     undef $field if $delete{$field->{name}};  
   }  
 }  
566    
567  =head2 $self->count ([$field_name])  =head2 $self->count ([$field_name])
568    
# Line 506  of fields.  (Same as $#$self+1) Line 572  of fields.  (Same as $#$self+1)
572    
573  =cut  =cut
574    
575  sub count ($;$) {  sub _count_by_name ($$\%) {
576    my $self = shift;    my $self = shift;
577    my ($name) = (lc shift);    my ($array, $option) = @_;
578    unless ($name) {    my $name = $self->_n11n_field_name ($$option{-name});
579      $self->_delete_empty_field ();    my @a = grep {$_->{name} eq $name} @{$self->{$array}};
580      return $#{$self->{field}}+1;    $#a + 1;
581    }  }
582    my $count = 0;  
583    for my $field (@{$self->{field}}) {  ## Delete empty items
584      if ($field->{name} eq $name) {  sub _delete_empty ($) {
585        $count++;    my $self = shift;
586      }    my $array = $self->{option}->{_HASH_NAME};
587    }    $self->{$array} = [grep {ref $_ && length $_->{name}} @{$self->{$array}}];
   $count;  
588  }  }
589    
590  =head2 $self->rename ($field-name, $new-name, [$old, $new,...])  =head2 $self->rename ($field-name, $new-name, [$old, $new,...])
# Line 535  sub rename ($%) { Line 600  sub rename ($%) {
600    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
601    my %new_name;    my %new_name;
602    for (grep {/^[^-]/} keys %params) {    for (grep {/^[^-]/} keys %params) {
603      my ($old => $new) = (lc $_ => lc $params{$_});      my ($old => $new)
604          = ($self->_n11n_field_name ($_) => $self->_n11n_field_name ($params{$_}));
605        $old =~ tr/_/-/ if $option{translate_underscore};
606      $new =~ tr/_/-/ if $option{translate_underscore};      $new =~ tr/_/-/ if $option{translate_underscore};
607      Carp::croak "rename: $new: invalid field-name"      Carp::croak "rename: $new: invalid field-name"
608        if $option{validate} && $new =~ /$REG{UNSAFE_field_name}/;        if $option{field_name_validation}
609            && $new =~ /$REG{$option{field_name_unsafe_rule}}/;
610      $new_name{$old} = $new;      $new_name{$old} = $new;
611    }    }
612    for my $field (@{$self->{field}}) {    for my $field (@{$self->{value}}) {
613      if (length $new_name{$field->{name}}) {      if (length $new_name{$field->{name}}) {
614        $field->{name} = $new_name{$field->{name}};        $field->{name} = $new_name{$field->{name}};
615      }      }
# Line 559  for each value. Line 627  for each value.
627    
628  =cut  =cut
629    
630  sub scan ($&) {  sub _scan_sort ($\@\%) {
631    my ($self, $sub) = @_;    my $self = shift;
632      my ($array, $option) = @_;
633    my $sort;    my $sort;
634    $sort = \&_header_cmp if $self->{option}->{sort} eq 'good-practice';    $sort = \&_header_cmp if $option->{field_sort} eq 'good-practice';
635    $sort = {$a cmp $b} if $self->{option}->{sort} eq 'alphabetic';    $sort = {$a cmp $b} if $option->{field_sort} eq 'alphabetic';
636    my @field = @{$self->{field}};    return ( sort $sort @$array ) if ref $sort;
637    if (ref $sort) {    @$array;
638      @field = sort $sort @{$self->{field}};  }
639    }  
640    for my $field (@field) {  sub _n11n_field_name ($$) {
641      next if $field->{name} =~ /^_/;    no strict 'refs';
642      &$sub($field->{name} => $field->{body});    my $self = shift;
643    }    my $s = shift;
644      $s =~ s/^$REG{WSP}+//; $s =~ s/$REG{WSP}+$//;
645      $s = lc $s unless ${&_NS_uri2package ($self->{option}->{ns_default_phuri}).'::OPTION'}{case_sensible};
646      $s;
647  }  }
648    
649  # 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 671  sub stringify ($;%) {
671    my $self = shift;    my $self = shift;
672    my %params = @_;    my %params = @_;
673    my %option = %{$self->{option}};    my %option = %{$self->{option}};
674      $option{format} = $params{-format} if $params{-format};
675      $self->_init_by_format ($option{format}, \%option);
676    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
677      ## Fill required fields
678        my %exist;
679        for ($self->field_name_list) {$exist{$_} = 1}
680        &{ $option{hook_stringify_fill_fields} } ($self, \%exist, \%option);
681    my @ret;    my @ret;
682    if ($option{mail_from}) {    ## RFC 2774 numerical field name prefix
683      my $fromline = $self->field ('mail-from');    my %nprefix;
684      push @ret, 'From '.$fromline if $fromline;    {no strict 'refs';
685    }      %nprefix = reverse %{ $self->{ns}->{number2uri} };
686    $self->scan (sub {      my $i = (sort { $a <=> $b } keys %{ $self->{ns}->{number2uri} })[-1] + 1;
687      my ($name, $body) = (@_);      $i = 10 if $i < 10;
688      return unless length $name;      my $hprefix = ${ &_NS_uri2package
689      return if $option{mail_from} && $name eq 'mail-from';                         ($self->{ns}->{phname2uri}->{'x-http'})
690      return if !$option{output_bcc} && ($name eq 'bcc' || $name eq 'resent-bcc');                         .'::OPTION' } {namespace_phname_goodcase};
691      my $fbody;      for my $uri (keys %nprefix) {
692      if (ref $body) {        if ($nprefix{ $uri } < 10) {
693        $fbody = $body->stringify (-format => $option{format});          $nprefix{ $uri } = $i++;
694      } else {        }
695        $fbody = $body;        my $nsfs = $self->item ($uri, -by => 'http-ns-define');
696          for my $i (0..$nsfs->count-1) {
697            my $nsf = ($nsfs->value ($i))[0];
698            if ($nsf->value eq $uri) {
699              $nsf->replace (ns => $nprefix{ $uri });
700              $nprefix{ $uri } = $hprefix . '-' . $nprefix{ $uri };
701              last;
702            }
703          }
704      }      }
705      return unless length $fbody;    }
706      $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;    my $_stringify = sub {
707      $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;      no strict 'refs';
708      $name =~ s/((?:^|-)[a-z])/uc($1)/ge if $option{capitalize};        my ($name, $body, $nsuri) = ($_[1]->{name}, $_[1]->{body}, $_[1]->{ns});
709      $fbody = $self->_fold ($fbody) if $self->{option}->{fold};        return unless length $name;
710      push @ret, sprintf $self->{option}->{field_format_pattern}, $name, $fbody;        return if $option{output_mail_from} && $name eq 'mail-from';
711    });        $body = '' if !$option{output_bcc} && $name eq 'bcc';
712    my $ret = join ("\n", @ret);        my $nspackage = &_NS_uri2package ($nsuri);
713    $ret? $ret."\n": '';        my $oname;        ## Outputed field-name
714          my $prefix = $nprefix{ $nsuri }
715                    || ${$nspackage.'::OPTION'} {namespace_phname_goodcase}
716                    || $self->{ns}->{uri2phname}->{ $nsuri };
717          my $default_prefix = ${ &_NS_uri2package ($option{ns_default_phuri})
718                                  .'::OPTION'} {namespace_phname_goodcase};
719          $prefix = '' if $prefix eq $default_prefix;
720          $prefix =~ s/^\Q$default_prefix\E-//;
721          my $gc = ${$nspackage.'::OPTION'} {to_be_goodcase};
722          if (ref $gc) { $oname = &$gc ($self, $nspackage, $name, \%option) }
723          else { $oname = $name }
724          if ($prefix) { $oname = $prefix . '-' . $oname }
725          if ($option{format} =~ /uri-url-mailto/) {
726            return if (( ${$nspackage.'::OPTION'} {uri_mailto_safe}->{$name}
727                      || ${$nspackage.'::OPTION'} {uri_mailto_safe}->{':default'})
728                      < $option{uri_mailto_safe_level});
729            if ($name eq 'to') {
730              $body = $self->field ('to', -new_item_unless_exist => 0);
731              if (ref $body && $body->have_group) {
732                #
733              } elsif (ref $body && $body->count > 1) {
734                $body = $body->clone;
735                $body->delete ({-by => 'index'}, 0);
736              }
737            }
738          }
739          my $fbody;
740          if (ref $body) {
741            $fbody = $body->stringify (-format => $option{format});
742          } else {
743            $fbody = $body;
744          }
745          unless (${$nspackage.'::OPTION'} {field}->{$name}->{empty_body}) {
746            return unless length $fbody;
747          }
748          unless ($option{linebreak_strict}) {
749            ## bare \x0D and bare \x0A are unsafe
750            $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;
751            $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;
752          } else {
753            $fbody =~ s/\x0D\x0A(?=[^\x09\x20])/\x0D\x0A\x20/g;
754          }
755          if ($option{use_folding}) {
756            if (ref $option{output_folding}) {
757              $fbody = &{$option{output_folding}} ($self, $fbody,
758                -initial_length => length ($oname) +2);
759            } elsif ($option{output_folding}) {
760              $fbody = $self->_fold ($fbody, -initial_length => length ($oname) +2);
761            }
762          }
763          push @ret, sprintf $option{field_format_pattern}, $oname, $fbody;
764        };
765      if ($option{format} =~ /uri-url-mailto/) {
766        if ($option{format} =~ /uri-url-mailto-to/) {
767          my $to = $self->field ('to', -new_item_unless_exist => 0);
768          if ($to) {
769            unless ($to->have_group) {
770              my $fbody = $to->stringify (-format => $option{format}, -max => 1);
771              return &{$option{output_folding}} ($self, $fbody);
772            }
773          }
774          '';
775        } elsif ($option{format} =~ /uri-url-mailto-rfc1738/) {
776          my $to = $self->field ('to', -new_item_unless_exist => 0);
777          if ($to) {
778            my $fbody = $to->addr_spec (-format => $option{format});
779            return &{$option{output_folding}} ($self, $fbody);
780          }
781          '';
782        } else {
783          $self->scan ($_stringify);
784          my $ret = join ('&', @ret);
785          $ret;
786        }
787      } else {
788        if ($option{output_mail_from}) {
789          my $fromline = $self->field ('mail-from', -new_item_unless_exist => 0);
790          push @ret, 'From '.$fromline if $fromline;
791        }
792        $self->scan ($_stringify);
793        my $ret = join ("\x0D\x0A", @ret);
794        $ret? $ret."\x0D\x0A": '';
795      }
796  }  }
797  *as_string = \&stringify;  *as_string = \&stringify;
798    
# Line 640  sub option ($@) { Line 808  sub option ($@) {
808      return $self->{option}->{ shift (@_) };      return $self->{option}->{ shift (@_) };
809    }    }
810    while (my ($name, $value) = splice (@_, 0, 2)) {    while (my ($name, $value) = splice (@_, 0, 2)) {
     $name =~ s/^-//;  
811      $self->{option}->{$name} = $value;      $self->{option}->{$name} = $value;
812      if ($name eq 'format') {      if ($name eq 'format') {
813        for my $f (@{$self->{field}}) {        for my $f (@{$self->{field}}) {
# Line 652  sub option ($@) { Line 819  sub option ($@) {
819    }    }
820  }  }
821    
822  sub field_type ($$;$) {  sub field_type ($@) {shift->SUPER::value_type (@_)}
823    
824    ## $self->_fold ($string, %option = (-max, -initial_length(for field-name)) )
825    sub _fold ($$;%) {
826    my $self = shift;    my $self = shift;
827    my $field_name = shift;    my $string = shift;
828    my $new_field_type = shift;    my %option = @_;
829    if ($new_field_type) {    my $max = $self->{option}->{line_length_max};
830      $self->{option}->{field_type}->{$field_name} = $new_field_type;    $max = 20 if $max < 20;
831    }    
832    $self->{option}->{field_type}->{$field_name}    my $l = $option{-initial_length} || 0;
833    || $self->{option}->{field_type}->{':DEFAULT'};    $l += length $1 if $string =~ /^([^\x09\x20]+)/;
834      $string =~ s{([\x09\x20][^\x09\x20]+)}{
835        my $s = $1;
836        if (($l + length $s) > $max) {
837          $s = "\x0D\x0A\x20" . $s;
838          $l = 1 + length $s;
839        } else { $l += length $s }
840        $s;
841      }gex;
842      $string;
843  }  }
844    
845  sub _delete_empty_field ($) {  sub _ns_load_ph ($$) {
846    my $self = shift;    my $self = shift;
847    my @ret;    my $name = shift;     ## normalized prefix (without HYPHEN-MINUS)
848    for my $field (@{$self->{field}}) {    return if $self->{ns}->{phname2uri}->{$name};
849      push @ret, $field if $field->{name};    $self->{ns}->{phname2uri}->{$name} = $NS_phname2uri{$name};
850    }    return unless $self->{ns}->{phname2uri}->{$name};
851    $self->{field} = \@ret;    $self->{ns}->{uri2phname}->{$self->{ns}->{phname2uri}->{$name}} = $name;
852    $self;  }
853    
854    sub _ns_associate_numerical_prefix ($) {
855      my $self = shift;
856      $self->scan (sub {shift;
857        my $f = shift;  return unless $f->{name};
858        if ($f->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
859         || $f->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
860          my $fn = $f->{name};
861          if ($fn eq 'opt' || $fn eq 'man') {
862            $f->{body} = $self->_parse_value ($fn => $f->{body}, ns => $f->{ns});
863            for ($f->{body}->value (0..$f->{body}->count-1)) {
864              my ($nsuri, $number) = ($_->value, $_->item ('ns'));
865              if ($number && $nsuri) {
866                $self->{ns}->{number2uri}->{ $number } = $nsuri;
867              }
868            }
869          }
870        }
871      });
872      $self->scan (sub {shift;
873        my $f = shift;
874        if ($f->{ns} =~ /urn:x-suika-fam-cx:msgpm:header:x-temp:([0-9]+)$/ && $self->{ns}->{number2uri}->{ $1 }) {
875          $f->{ns} = $self->{ns}->{number2uri}->{ $1 };
876        }
877      });
878  }  }
879    
880  sub _fold ($$;$) {  ## $package_name = Message::Header::_NS_uri2phpackage ($nsuri)
881    my $self = shift;  ## (For internal use of Message::* modules)
882    my $string = shift;  sub _NS_uri2phpackage ($) {
883    my $len = shift || $self->{option}->{fold_length};    $NS_uri2phpackage{$_[0]}
884    $len = 60 if $len < 60;    || $NS_uri2phpackage{$Message::Header::Default::OPTION{namespace_uri}};
885      }
886    ## This code is taken from Mail::Header 1.43 in MailTools,  sub _NS_uri2package ($) {
887    ## by Graham Barr (Maintained by Mark Overmeer <mailtools@overmeer.net>).    $NS_uri2package{$_[0]}
888    my $max = int($len - 5);         # 4 for leading spcs + 1 for [\,\;]    || $NS_uri2phpackage{$_[0]}
889    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;  
890  }  }
891    
892  =head2 $self->clone ()  =head2 $self->clone ()
# Line 713  Returns a copy of Message::Header object Line 895  Returns a copy of Message::Header object
895    
896  =cut  =cut
897    
898  sub clone ($) {  ## 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;  
 }  
899    
900  =head1 NOTE  =head1 NOTE
901    
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