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von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare
Cokiee Shell
| Current Path : /usr/share/perl5/Email/MIME/ |
| Current File : //usr/share/perl5/Email/MIME/ContentType.pm |
package Email::MIME::ContentType;
# $Id: /my/pep/Email-MIME-ContentType/trunk/lib/Email/MIME/ContentType.pm 31133 2007-03-22T19:52:26.296283Z rjbs $
use base 'Exporter';
use vars qw[
$VERSION @EXPORT
$STRICT_PARAMS
];
@EXPORT = qw(parse_content_type);
use strict;
use Carp;
$VERSION = '1.014';
$STRICT_PARAMS=1;
my $tspecials = quotemeta '()<>@,;:\\"/[]?=';
my $ct_default = 'text/plain; charset=us-ascii';
my $extract_quoted =
qr/(?:\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|\'(?:[^\\\']*(?:\\.[^\\\']*)*)\')/;
# For documentation, really:
{
my $discrete = qr/[^$tspecials]+/;
my $composite = qr/[^$tspecials]+/;
my $params = qr/;.*/;
sub parse_content_type { # XXX This does not take note of RFC2822 comments
my $ct = shift;
# If the header isn't there or is empty, give default answer.
return parse_content_type($ct_default) unless defined $ct and length $ct;
# It is also recommend (sic.) that this default be assumed when a
# syntactically invalid Content-Type header field is encountered.
return parse_content_type($ct_default)
unless $ct =~ m[ ^ ($discrete) / ($composite) \s* ($params)? $ ]x;
return {
discrete => lc $1,
composite => lc $2,
attributes => _parse_attributes($3)
};
}
}
sub _parse_attributes {
local $_ = shift;
my $attribs = {};
while ($_) {
s/^;//;
s/^\s+// and next;
s/\s+$//;
unless (s/^([^$tspecials]+)=//) {
# We check for $_'s truth because some mail software generates a
# Content-Type like this: "Content-Type: text/plain;"
# RFC 1521 section 3 says a parameter must exist if there is a
# semicolon.
carp "Illegal Content-Type parameter $_" if $STRICT_PARAMS or $_;
return $attribs;
}
my $attribute = lc $1;
my $value = _extract_ct_attribute_value();
$attribs->{$attribute} = $value;
}
return $attribs;
}
sub _extract_ct_attribute_value { # EXPECTS AND MODIFIES $_
my $value;
while ($_) {
s/^([^$tspecials]+)// and $value .= $1;
s/^($extract_quoted)// and do {
my $sub = $1; $sub =~ s/^["']//; $sub =~ s/["']$//;
$value .= $sub;
};
/^;/ and last;
/^([$tspecials])/ and do {
carp "Unquoted $1 not allowed in Content-Type!";
return;
}
}
return $value;
}
1;
__END__
=head1 NAME
Email::MIME::ContentType - Parse a MIME Content-Type Header
=head1 VERSION
version 1.013
$Id: /my/pep/Email-MIME-ContentType/trunk/lib/Email/MIME/ContentType.pm 31133 2007-03-22T19:52:26.296283Z rjbs $
=head1 SYNOPSIS
use Email::MIME::ContentType;
# Content-Type: text/plain; charset="us-ascii"; format=flowed
my $ct = 'text/plain; charset="us-ascii"; format=flowed';
my $data = parse_content_type($ct);
$data = {
discrete => "text",
composite => "plain",
attributes => {
charset => "us-ascii",
format => "flowed"
}
};
=head1 FUNCTIONS
=head2 parse_content_type
This routine is exported by default.
This routine parses email content type headers according to section 5.1 of RFC
2045. It returns a hash as above, with entries for the discrete type, the
composite type, and a hash of attributes.
=head1 WARNINGS
This is not a valid content-type header, according to both RFC 1521 and RFC
2045:
Content-Type: type/subtype;
If a semicolon appears, a parameter must. C<parse_content_type> will carp if
it encounters a header of this type, but you can suppress this by setting
C<$Email::MIME::ContentType::STRICT_PARAMS> to a false value. Please consider
localizing this assignment!
=head1 PERL EMAIL PROJECT
This module is maintained by the Perl Email Project.
L<http://emailproject.perl.org/wiki/Email::MIME::ContentType>
=head1 AUTHOR
Casey West, C<casey@geeknest.com>
Simon Cozens, C<simon@cpan.org>
=head1 SEE ALSO
L<Email::MIME>
=cut
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