File::MMagic::XS(3) Guess File Type With XS (a la mod_mime_magic)

SYNOPSIS


use File::MMagic::XS;
my $m = File::MMagic::XS->new();
$m = File::MMagic::XS->new('/etc/magic'); # use external magic file
my $mime = $m->get_mime($file);
# use File::MMagic compatible interface
use File::MMagic::XS qw(:compat);
my $m = File::MMagic::XS->new();
$m->checktype_filename($file);

DESCRIPTION

This is a port of Apache2 mod_mime_magic.c in Perl, written in XS with the aim of being efficient and fast, especially for applications that need to be run for an extended amount of time.

There is a compatibility layer for File::MMagic. you can specify :compat when importing the module 

   use File::MMagic::XS qw(:compat);

And then the following methods are going to be available from File::MMagic::XS: 

   checktype_filename
   checktype_filehandle
   checktype_contents
   addMagicEntry

Currently this software is in beta. If you have suggestions/recommendations about the interface or anything else, now is your chance to send them!

METHODS

new(%args)

Creates a new File::MMagic::XS object.

If you specify the "file" argument, then File::MMagic::XS will load magic definitions from the specified file. If unspecified, it will use the magic file that will be installed under File/MMagic/ directory.

clone()

Clones an existing File::MMagic::XS object.

parse_magic_file($file)

Read and parse a magic file, as used by Apache2.

get_mime($file)

Inspects the file specified by $file and returns a MIME type if possible. If no matching MIME type is found, then undef is returned.

fsmagic($file)

Inspects a file and returns a MIME type using inode information only. The contents of the file is not inspected.

fhmagic($fh)

Inspects a file handle and returns a mime string by reading the contents of the file handle.

ascmagic($file)

Inspects a piece of data (assuming it's not binary data), and attempts to determine the file type.

bufmagic($scalar)

Inspects a scalar buffer, and attempts to determine the file type

add_magic($magic_line)

Adds a new magic entry to the object. The format of $magic_line is the same as magic(5) file. This allows you to add custom magic entries at run time

add_file_ext($ext, $mime)

Adds a new file extension to MIME mapping. This is used as a fallback method to determining MIME types. 

  my $magic = File::MMagic::XS->new;
  $magic->add_file_ext('t', 'text/perl-test');
  my $mime  = $magic->get_mime('t/01-sanity.t');

This will make get_mime() return 'text/perl-test'.

error()

Returns the last error string.

PERFORMANCE

This is on my laptop (MacBook, Core 2 Duo/ Mac OS X 10.4.3), tested against File::MMagic::XS 0.09003 

          Rate  perl    xs
  perl   513/s    --  -96%
  xs   12048/s 2249%    --

AUTHOR

Copyright 2005-2007 Daisuke Maki <[email protected]>.

Underlying software: Copyright 1999-2004 The Apache Software Foundation, Copyright (c) 1996-1997 Cisco Systems, Inc., Copyright (c) Ian F. Darwin, 1987. Written by Ian F. Darwin.

LICENSE

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

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