MIME::Type(3) User Contributed Perl Documentation MIME::Type(3)NAMEMIME::Type - Definition of one MIME type
SYNOPSIS
use MIME::Types;
my $mimetypes = MIME::Types->new;
my MIME::Type $plaintext = $mimetypes->type('text/plain');
print $plaintext->mediaType; # text
print $plaintext->subType; # plain
my @ext = $plaintext->extensions;
print "@ext" # txt asc c cc h hh cpp
print $plaintext->encoding # 8bit
if($plaintext->isBinary) # false
if($plaintext->isAscii) # true
if($plaintext->equals('text/plain') {...}
if($plaintext eq 'text/plain') # same
print MIME::Type->simplified('x-appl/x-zip') # 'appl/zip'
DESCRIPTION
MIME types are used in MIME entities, for instance as part of e-mail
and HTTP traffic. Sometimes real knowledge about a mime-type is need.
Objects of "MIME::Type" store the information on one such type.
This module is built to conform to the MIME types of RFC's 2045 and
2231. It follows the official IANA registry at
http://www.iana.org/assignments/media-types/ and the collection kept at
http://www.ltsw.se/knbase/internet/mime.htp
OVERLOADED
overload: string comparison
When a MIME::Type object is compared to either a string or another
MIME::TYpe, the equals() method is called. Comparison is smart,
which means that it extends common string comparison with some
features which are defined in the related RFCs.
overload: stringification
The stringification (use of the object in a place where a string is
required) will result in the type name, the same as type() returns.
example: use of stringification
my $mime = MIME::Type->new('text/html');
print "$mime\n"; # explicit stringification
print $mime; # implicit stringification
METHODS
Initiation
MIME::Type->new(OPTIONS)
Create (instantiate) a new MIME::Type object which manages one mime
type.
Option --Default
encoding <depends on type>
extensions []
simplified <derived from type>
system undef
type <required>
. encoding => '7bit'|'8bit'|'base64'|'quoted-printable'
How must this data be encoded to be transported safely. The
default depends on the type: mimes with as main type "text/"
will default to "quoted-printable" and all other to "base64".
. extensions => REF-ARRAY
An array of extensions which are using this mime.
. simplified => STRING
The mime types main- and sub-label can both start with "x-", to
indicate that is a non-registered name. Of course, after
registration this flag can disappear which adds to the
confusion. The simplified string has the "x-" thingies removed
and are translated to lower-case.
. system => REGEX
Regular expression which defines for which systems this rule is
valid. The REGEX is matched on $^O.
. type => STRING
The type which is defined here. It consists of a type and a
sub-type, both case-insensitive. This module will return
lower-case, but accept upper-case.
Attributes
$obj->encoding
Returns the type of encoding which is required to transport data of
this type safely.
$obj->extensions
Returns a list of extensions which are known to be used for this
mime type.
$obj->simplified([STRING])
MIME::Type->simplified([STRING])
Returns the simplified mime type for this object or the specified
STRING. Mime type names can get officially registered. Until
then, they have to carry an "x-" preamble to indicate that. Of
course, after recognition, the "x-" can disappear. In many cases,
we prefer the simplified version of the type.
example: results of simplified()
my $mime = MIME::Type->new(type => 'x-appl/x-zip');
print $mime->simplified; # 'appl/zip'
print $mime->simplified('text/plain'); # 'text/plain'
print MIME::Type->simplified('x-xyz/x-abc'); # 'xyz/abc'
$obj->system
Returns the regular expression which can be used to determine
whether this type is active on the system where you are working on.
$obj->type
Returns the long type of this object, for instance 'text/plain'
Knowledge
$obj->equals(STRING|MIME)
Compare this mime-type object with a STRING or other object. In
case of a STRING, simplification will take place.
$obj->isAscii
Returns false when the encoding is base64, and true otherwise. All
encodings except base64 are text encodings.
$obj->isBinary
Returns true when the encoding is base64.
$obj->isRegistered
Mime-types which are not registered by IANA nor defined in RFCs
shall start with an "x-". This counts for as well the media-type
as the sub-type. In case either one of the types starts with "x-"
this method will return false.
$obj->isSignature
Returns true when the type is in the list of known signatures.
$obj->mediaType
The media type of the simplified mime. For 'text/plain' it will
return 'text'.
For historical reasons, the 'mainType' method still can be used to
retreive the same value. However, that method is deprecated.
$obj->subType
The sub type of the simplified mime. For 'text/plain' it will
return 'plain'.
DIAGNOSTICS
Error: Type parameter is obligatory.
When a MIME::Type object is created, the type itself must be
specified with the "type" option flag.
SEE ALSO
This module is part of MIME-Types distribution version 1.31, built on
September 21, 2010. Website: http://perl.overmeer.net/mimetypes/
LICENSE
Copyrights 1999,2001-2010 by Mark Overmeer. For other contributors see
ChangeLog.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself. See
http://www.perl.com/perl/misc/Artistic.html
perl v5.14.2 2010-09-21 MIME::Type(3)
