Content-type: text/html Man page of LWP::MediaTypes


Section: User Contributed Perl Documentation (3pm)
Updated: 2009-06-15
Index Return to Main Contents


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 MIME) 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_uri, $header_to_modify )
This function tries to guess media type and encoding for a file or a URI. 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. Example:

    add_type("x-world/x-vrml" => qw(wrl vrml));

add_encoding( $type, @ext )
Associate a list of file extensions with an encoding type. Example:

 add_encoding("x-gzip" => "gz");

read_media_types( @files )
Parse media types files and add the type mappings found there. Example:




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.




This document was created by man2html, using the manual pages.
Time: 04:14:16 GMT, September 24, 2010