Section: User Contributed Perl Documentation (3)
LWP::MediaTypes - guess media type for a file or a URL
use LWP::MediaTypes qw(guess_media_type);
$type = guess_media_type("/tmp/foo.gif");
This module provides functions for handling media (also known as
) types and encodings. The mapping from file extensions to media
types is defined by the media.types
file. If the ~/.media.types
file exists it is used instead.
For backwards compatibility we will also look for ~/.mime.types
The following functions are exported by default:
- guess_media_type( $filename )
- guess_media_type( $uri )
- guess_media_type( $filename_or_object, $header_to_modify )
This function tries to guess media type and encoding for a file or objects that
support the a "path" or "filename" method, eg, URI or File::Temp objects.
When an object does not support either method, it will be stringified to
determine the filename.
It returns the content type, which is a string like "text/html".
In array context it also returns any content encodings applied (in the
order used to encode the file). You can pass a URI object
reference, instead of the file name.
If the type can not be deduced from looking at the file name,
then guess_media_type() will let the "-T" Perl operator take a look.
If this works (and "-T" returns a TRUE value) then we return
text/plain as the type, otherwise we return
application/octet-stream as the type.
The optional second argument should be a reference to a HTTP::Headers
object or any object that implements the $obj->header method in a
similar way. When it is present the values of the
'Content-Type' and 'Content-Encoding' will be set for this header.
- media_suffix( $type, ... )
This function will return all suffixes that can be used to denote the
specified media type(s). Wildcard types can be used. In a scalar
context it will return the first suffix found. Examples:
@suffixes = media_suffix('image/*', 'audio/basic');
$suffix = media_suffix('text/html');
The following functions are only exported by explicit request:
- add_type( $type, @exts )
Associate a list of file extensions with the given media type.
add_type("x-world/x-vrml" => qw(wrl vrml));
- add_encoding( $type, @ext )
Associate a list of file extensions with an encoding type.
add_encoding("x-gzip" => "gz");
- read_media_types( @files )
Parse media types files and add the type mappings found there.
Copyright 1995-1999 Gisle Aas.
This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.