modules/mimedetect/mimedetect.module

<?php
// $Id: mimedetect.module,v 1.12 2009/05/09 17:42:01 drewish Exp $

/**
 * @file
 * Provide server side mime type detection.
 *
 * @author Darrel O'Pry, http://www.drupal.org/user/22202
 * @copyright Copyright(c) 2007, Darrel O'Pry
 */


function mimedetect_menu() {
  $items = array();

  // The admin settings form.
  $items['admin/settings/mimedetect'] = array(
    'title' => 'Mime type detection',
    'description' => 'Control how the mime type of uploaded files will be determined.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('mimedetect_settings'),
    'access arguments' => array('administer site configuration'),
    'file' => 'mimedetect.admin.inc',
  );

  return $items;
}

/**
 * Detect File Mime Type.
 *
 * @param $file A standard Drupal file object. The filepath property is used to
 *   locate the file and if the mime detection fails, the mimetype property is
 *   returned.
 * @return String containing the file's MIME type.
 */
function mimedetect_mime($file) {
  $file = (object)$file;

  // An additional array of mimetypes not included in file_get_mimetype().
  static $additional_mimes = array(
    // Audio types
    'rmi' => 'audio/midi',
    'aidff' => 'audio/x-aiff',
    // Image types
    'cod' => 'image/cis-cod',
    'jfif' => 'image/pipeg',
    'cmx' => 'image/x-cmx',
    // Video types
    'mpa' => 'video/mpeg',
    'mpv2' => 'video/mpeg',
    'asr' => 'video/x-ms-asf',
  );

  $mime = FALSE;
  $magic_file = variable_get('mimedetect_magic', drupal_get_path('module', 'mimedetect') .'/magic');

  // Try to use the fileinfo extension first.
  if (extension_loaded('fileinfo')) {
    static $finfo = FALSE;
    if ($finfo || $finfo = @finfo_open(FILEINFO_MIME, $magic_file)) {
      $mime = finfo_file($finfo, realpath($file->filepath));
    }
  }

  // Try the 'file' binary.
  if (!$mime && variable_get('mimedetect_enable_file_binary', FALSE)
    && ($filebin = variable_get('mimedetect_file_binary', '/usr/bin/file'))
    && is_executable($filebin))
  {
    // On OSX the -i switch is -I, so if we use the long flags everyone is
    // happy. I checked back to version 3.41 and it still supports the long
    // names but if you run into problems you can use " -bi ".
    $command = $filebin . ' --brief --mime --magic-file=' . escapeshellarg($magic_file) . ' ' . escapeshellarg($file->filepath);
    $mime = trim(exec($command));
    // with text we often get charset like 'text/plain; charset=us-ascii'
    $mime = split(';', $mime);
    $mime = trim($mime[0]);
  }

  // ASF derived media formats are hard to detect with magic. They're typically
  // all reported as video/x-ms-asf or application/octet-stream. These aren't
  // really informative about the media type, so we attempt to figure it out by
  // extension. I expect OGG to present similar difficulties in determining how
  // it should be played.
  if (!$mime || $mime == 'application/octet-stream') {
    // Try core's mime mapping first...
    $mime = file_get_mimetype($file->filename);
    // ...and if that doesn't turn up anything try our additional mappings.
    if ($mime == 'application/octet-stream') {
      $mime = file_get_mimetype($file->filename, $additional_mimes);
    }
  }

  return $mime;
}
1	<?php
2	// $Id: mimedetect.module,v 1.12 2009/05/09 17:42:01 drewish Exp $
3
4	/**
5	* @file
6	* Provide server side mime type detection.
7	*
8	* @author Darrel O'Pry, http://www.drupal.org/user/22202
9	* @copyright Copyright(c) 2007, Darrel O'Pry
10	*/
11
12
13	function mimedetect_menu() {
14	$items = array();
15
16	// The admin settings form.
17	$items['admin/settings/mimedetect'] = array(
18	'title' => 'Mime type detection',
19	'description' => 'Control how the mime type of uploaded files will be determined.',
20	'page callback' => 'drupal_get_form',
21	'page arguments' => array('mimedetect_settings'),
22	'access arguments' => array('administer site configuration'),
23	'file' => 'mimedetect.admin.inc',
24	);
25
26	return $items;
27	}
28
29	/**
30	* Detect File Mime Type.
31	*
32	* @param $file A standard Drupal file object. The filepath property is used to
33	* locate the file and if the mime detection fails, the mimetype property is
34	* returned.
35	* @return String containing the file's MIME type.
36	*/
37	function mimedetect_mime($file) {
38	$file = (object)$file;
39
40	// An additional array of mimetypes not included in file_get_mimetype().
41	static $additional_mimes = array(
42	// Audio types
43	'rmi' => 'audio/midi',
44	'aidff' => 'audio/x-aiff',
45	// Image types
46	'cod' => 'image/cis-cod',
47	'jfif' => 'image/pipeg',
48	'cmx' => 'image/x-cmx',
49	// Video types
50	'mpa' => 'video/mpeg',
51	'mpv2' => 'video/mpeg',
52	'asr' => 'video/x-ms-asf',
53	);
54
55	$mime = FALSE;
56	$magic_file = variable_get('mimedetect_magic', drupal_get_path('module', 'mimedetect') .'/magic');
57
58	// Try to use the fileinfo extension first.
59	if (extension_loaded('fileinfo')) {
60	static $finfo = FALSE;
61	if ($finfo \|\| $finfo = @finfo_open(FILEINFO_MIME, $magic_file)) {
62	$mime = finfo_file($finfo, realpath($file->filepath));
63	}
64	}
65
66	// Try the 'file' binary.
67	if (!$mime && variable_get('mimedetect_enable_file_binary', FALSE)
68	&& ($filebin = variable_get('mimedetect_file_binary', '/usr/bin/file'))
69	&& is_executable($filebin))
70	{
71	// On OSX the -i switch is -I, so if we use the long flags everyone is
72	// happy. I checked back to version 3.41 and it still supports the long
73	// names but if you run into problems you can use " -bi ".
74	$command = $filebin . ' --brief --mime --magic-file=' . escapeshellarg($magic_file) . ' ' . escapeshellarg($file->filepath);
75	$mime = trim(exec($command));
76	// with text we often get charset like 'text/plain; charset=us-ascii'
77	$mime = split(';', $mime);
78	$mime = trim($mime[0]);
79	}
80
81	// ASF derived media formats are hard to detect with magic. They're typically
82	// all reported as video/x-ms-asf or application/octet-stream. These aren't
83	// really informative about the media type, so we attempt to figure it out by
84	// extension. I expect OGG to present similar difficulties in determining how
85	// it should be played.
86	if (!$mime \|\| $mime == 'application/octet-stream') {
87	// Try core's mime mapping first...
88	$mime = file_get_mimetype($file->filename);
89	// ...and if that doesn't turn up anything try our additional mappings.
90	if ($mime == 'application/octet-stream') {
91	$mime = file_get_mimetype($file->filename, $additional_mimes);
92	}
93	}
94
95	return $mime;
96	}