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<?php
/**
* @author Tassos Marinos <info@tassos.gr>
* @link https://www.tassos.gr
* @copyright Copyright © 2024 Tassos All Rights Reserved
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
* @credits https://github.com/codeigniter4/CodeIgniter4/blob/develop/app/Config/Mimes.php
*/
namespace NRFramework;
// No direct access
defined('_JEXEC') or die;
class Mimes
{
/**
* Map of extensions to mime types.
*
* @var array
*/
public static $mimes = [
'hqx' => [
'application/mac-binhex40',
'application/mac-binhex',
'application/x-binhex40',
'application/x-mac-binhex40',
],
'cpt' => 'application/mac-compactpro',
'csv' => [
'text/csv',
'text/x-comma-separated-values',
'text/comma-separated-values',
'application/vnd.ms-excel',
'application/x-csv',
'text/x-csv',
'application/csv',
'application/excel',
'application/vnd.msexcel',
'text/plain',
],
'bin' => [
'application/macbinary',
'application/mac-binary',
'application/octet-stream',
'application/x-binary',
'application/x-macbinary',
],
'dms' => 'application/octet-stream',
'lha' => 'application/octet-stream',
'lzh' => 'application/octet-stream',
'exe' => [
'application/octet-stream',
'application/x-msdownload',
],
'class' => 'application/octet-stream',
'psd' => [
'application/x-photoshop',
'image/vnd.adobe.photoshop',
],
'so' => 'application/octet-stream',
'sea' => 'application/octet-stream',
'dll' => 'application/octet-stream',
'oda' => 'application/oda',
'pdf' => [
'application/pdf',
'application/force-download',
'application/x-download',
],
'ai' => [
'application/pdf',
'application/postscript',
],
'eps' => 'application/postscript',
'ps' => 'application/postscript',
'smi' => 'application/smil',
'smil' => 'application/smil',
'mif' => 'application/vnd.mif',
'xls' => [
'application/vnd.ms-excel',
'application/msexcel',
'application/x-msexcel',
'application/x-ms-excel',
'application/x-excel',
'application/x-dos_ms_excel',
'application/xls',
'application/x-xls',
'application/excel',
'application/download',
'application/vnd.ms-office',
'application/msword',
],
'ppt' => [
'application/vnd.ms-powerpoint',
'application/powerpoint',
'application/vnd.ms-office',
'application/msword',
],
'pptx' => [
'application/vnd.openxmlformats-officedocument.presentationml.presentation',
'application/x-zip',
'application/zip',
],
'wbxml' => 'application/wbxml',
'wmlc' => 'application/wmlc',
'dcr' => 'application/x-director',
'dir' => 'application/x-director',
'dxr' => 'application/x-director',
'dvi' => 'application/x-dvi',
'gtar' => 'application/x-gtar',
'gz' => 'application/x-gzip',
'gzip' => 'application/x-gzip',
'php' => [
'application/x-php',
'application/x-httpd-php',
'application/php',
'text/php',
'text/x-php',
'application/x-httpd-php-source',
],
'php4' => 'application/x-httpd-php',
'php3' => 'application/x-httpd-php',
'phtml' => 'application/x-httpd-php',
'phps' => 'application/x-httpd-php-source',
'js' => [
'application/x-javascript',
'text/plain',
],
'swf' => 'application/x-shockwave-flash',
'sit' => 'application/x-stuffit',
'tar' => 'application/x-tar',
'tgz' => [
'application/x-tar',
'application/x-gzip-compressed',
],
'z' => 'application/x-compress',
'xhtml' => 'application/xhtml+xml',
'xht' => 'application/xhtml+xml',
'zip' => [
'application/x-zip',
'application/zip',
'application/x-zip-compressed',
'application/s-compressed',
'multipart/x-zip',
],
'rar' => [
'application/vnd.rar',
'application/x-rar',
'application/rar',
'application/x-rar-compressed',
],
'mid' => 'audio/midi',
'midi' => 'audio/midi',
'mpga' => 'audio/mpeg',
'mp2' => 'audio/mpeg',
'mp3' => [
'audio/mpeg',
'audio/mpg',
'audio/mpeg3',
'audio/mp3',
],
'aif' => [
'audio/x-aiff',
'audio/aiff',
],
'aiff' => [
'audio/x-aiff',
'audio/aiff',
],
'aifc' => 'audio/x-aiff',
'ram' => 'audio/x-pn-realaudio',
'rm' => 'audio/x-pn-realaudio',
'rpm' => 'audio/x-pn-realaudio-plugin',
'ra' => 'audio/x-realaudio',
'rv' => 'video/vnd.rn-realvideo',
'wav' => [
'audio/x-wav',
'audio/wave',
'audio/wav',
],
'bmp' => [
'image/bmp',
'image/x-bmp',
'image/x-bitmap',
'image/x-xbitmap',
'image/x-win-bitmap',
'image/x-windows-bmp',
'image/ms-bmp',
'image/x-ms-bmp',
'application/bmp',
'application/x-bmp',
'application/x-win-bitmap',
],
'gif' => 'image/gif',
'jpg' => [
'image/jpeg',
'image/pjpeg',
],
'jpeg' => [
'image/jpeg',
'image/pjpeg',
],
'jpe' => [
'image/jpeg',
'image/pjpeg',
],
'jp2' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'j2k' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'jpf' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'jpg2' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'jpx' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'jpm' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'mj2' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'mjp2' => [
'image/jp2',
'video/mj2',
'image/jpx',
'image/jpm',
],
'png' => [
'image/png',
'image/x-png',
],
'tif' => 'image/tiff',
'tiff' => 'image/tiff',
'css' => [
'text/css',
'text/plain',
],
'html' => [
'text/html',
'text/plain',
],
'htm' => [
'text/html',
'text/plain',
],
'shtml' => [
'text/html',
'text/plain',
],
'txt' => 'text/plain',
'text' => 'text/plain',
'log' => [
'text/plain',
'text/x-log',
],
'rtx' => 'text/richtext',
'rtf' => 'text/rtf',
'xml' => [
'application/xml',
'text/xml',
'text/plain',
],
'xsl' => [
'application/xml',
'text/xsl',
'text/xml',
],
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'mpe' => 'video/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime',
'avi' => [
'video/x-msvideo',
'video/msvideo',
'video/avi',
'application/x-troff-msvideo',
],
'movie' => 'video/x-sgi-movie',
'doc' => [
'application/msword',
'application/vnd.ms-office',
],
'docx' => [
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/zip',
'application/msword',
'application/x-zip',
],
'dot' => [
'application/msword',
'application/vnd.ms-office',
],
'dotx' => [
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/zip',
'application/msword',
],
'xlsx' => [
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
'application/zip',
'application/vnd.ms-excel',
'application/msword',
'application/x-zip',
],
'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
'word' => [
'application/msword',
'application/octet-stream',
],
'xl' => 'application/excel',
'eml' => 'message/rfc822',
'json' => [
'application/json',
'text/json',
],
'pem' => [
'application/x-x509-user-cert',
'application/x-pem-file',
'application/octet-stream',
],
'p10' => [
'application/x-pkcs10',
'application/pkcs10',
],
'p12' => 'application/x-pkcs12',
'p7a' => 'application/x-pkcs7-signature',
'p7c' => [
'application/pkcs7-mime',
'application/x-pkcs7-mime',
],
'p7m' => [
'application/pkcs7-mime',
'application/x-pkcs7-mime',
],
'p7r' => 'application/x-pkcs7-certreqresp',
'p7s' => 'application/pkcs7-signature',
'crt' => [
'application/x-x509-ca-cert',
'application/x-x509-user-cert',
'application/pkix-cert',
],
'crl' => [
'application/pkix-crl',
'application/pkcs-crl',
],
'der' => 'application/x-x509-ca-cert',
'kdb' => 'application/octet-stream',
'pgp' => 'application/pgp',
'gpg' => 'application/gpg-keys',
'sst' => 'application/octet-stream',
'csr' => 'application/octet-stream',
'rsa' => 'application/x-pkcs7',
'cer' => [
'application/pkix-cert',
'application/x-x509-ca-cert',
],
'3g2' => 'video/3gpp2',
'3gp' => [
'video/3gp',
'video/3gpp',
],
'mp4' => 'video/mp4',
'm4a' => 'audio/x-m4a',
'f4v' => [
'video/mp4',
'video/x-f4v',
],
'flv' => 'video/x-flv',
'webm' => 'video/webm',
'aac' => 'audio/x-acc',
'm4u' => 'application/vnd.mpegurl',
'm3u' => 'text/plain',
'xspf' => 'application/xspf+xml',
'vlc' => 'application/videolan',
'wmv' => [
'video/x-ms-wmv',
'video/x-ms-asf',
],
'au' => 'audio/x-au',
'ac3' => 'audio/ac3',
'flac' => [
'audio/x-flac',
'audio/flac'
],
'ogg' => [
'audio/ogg',
'video/ogg',
'application/ogg',
],
'kra' => [
'application/x-krita',
'application/zip',
],
'krz' => [
'application/x-krita',
'application/zip',
],
'kmz' => [
'application/vnd.google-earth.kmz',
'application/zip',
'application/x-zip',
],
'kml' => [
'application/vnd.google-earth.kml+xml',
'application/xml',
'text/xml',
],
'ics' => 'text/calendar',
'ical' => 'text/calendar',
'zsh' => 'text/x-scriptzsh',
'7z' => [
'application/x-compressed',
'application/x-zip-compressed',
'application/x-7z-compressed',
'application/zip',
'multipart/x-zip',
],
'7zip' => [
'application/x-compressed',
'application/x-zip-compressed',
'application/x-7z-compressed',
'application/zip',
'multipart/x-zip',
],
'cdr' => [
'application/cdr',
'application/coreldraw',
'application/x-cdr',
'application/x-coreldraw',
'image/cdr',
'image/x-cdr',
'zz-application/zz-winassoc-cdr',
],
'wma' => [
'audio/x-ms-wma',
'video/x-ms-asf',
],
'jar' => [
'application/java-archive',
'application/x-java-application',
'application/x-jar',
'application/x-compressed',
],
'svg' => [
'image/svg+xml',
'image/svg',
'application/xml',
'text/xml',
],
'vcf' => 'text/x-vcard',
'srt' => [
'text/srt',
'text/plain',
],
'vtt' => [
'text/vtt',
'text/plain',
],
'ico' => [
'image/x-icon',
'image/x-ico',
'image/vnd.microsoft.icon',
],
'stl' => [
'application/sla',
'application/vnd.ms-pki.stl',
'application/x-navistyle',
],
];
/**
* Attempts to determine the best mime type for the given file extension.
*
* @param string $extension
*
* @return string|null The mime type found, or none if unable to determine.
*/
public static function getTypesFromExtension($extension)
{
$extension = trim(strtolower($extension), '. ');
if (!array_key_exists($extension, static::$mimes))
{
return null;
}
return (array) static::$mimes[$extension];
}
/**
* Attempts to determine the best file extension for a given mime type.
*
* @param string $type
* @param string|null $proposedExtension - default extension (in case there is more than one with the same mime type)
*
* @return string|null The extension determined, or null if unable to match.
*/
public static function guessExtensionFromType($type, $proposedExtension = null)
{
$type = trim(strtolower($type), '. ');
$proposedExtension = trim(strtolower($proposedExtension));
if ($proposedExtension !== '')
{
if (array_key_exists($proposedExtension, static::$mimes) && in_array($type, is_string(static::$mimes[$proposedExtension]) ? [static::$mimes[$proposedExtension]] : static::$mimes[$proposedExtension], true))
{
// The detected mime type matches with the proposed extension.
return $proposedExtension;
}
// An extension was proposed, but the media type does not match the mime type list.
return null;
}
// Reverse check the mime type list if no extension was proposed.
// This search is order sensitive!
foreach (static::$mimes as $ext => $types)
{
if ((is_string($types) && $types === $type) || (is_array($types) && in_array($type, $types, true)))
{
return $ext;
}
}
return null;
}
/**
* Test whether the given mime type is in the allowed file types.
*
* @param mixed $allowed_types Can be a list of comma separated types or an array of types. Types can be either an extension (.jpg) or a mime type (application/zip)
* @param string $mime The mime type to check
*
* @return mixed Null on failure, true on success
*/
public static function check($allowed_types, $detected_mime)
{
if (!$allowed_types || !$detected_mime)
{
return false;
}
$allowed_types = self::toSafeArray($allowed_types);
foreach ($allowed_types as $allowed_type)
{
// Check whether we have a mime type or a file extension. A Mime type is supposed to have a forward slash character.
// If we have a file extension (.jpg, .zip), convert it to a Mime type.
$allowed_mime_types = strpos($allowed_type, '/') === false ? self::getTypesFromExtension($allowed_type) : $allowed_type;
if (self::typeIsInTypes($detected_mime, $allowed_mime_types))
{
return true;
}
}
}
/**
* Validates if the provided file extension is allowed based on a list of permitted types.
*
* This method checks if the given file extension matches any of the allowed types specified.
* The allowed types can be either file extensions or MIME types. If a MIME type is provided,
* it is converted into its associated file extensions for validation.
*
* @param string $fileExtension The file extension to validate, which will be normalized to lowercase.
* @param array|string $allowedTypes An array or a comma-separated string of allowed file types (extensions or MIME types).
*
* @return bool Returns true if the file extension is valid; otherwise, false.
*/
public static function validateFileExtension($fileExtension, $allowedTypes)
{
$fileExtension = strtolower(ltrim(trim($fileExtension), '.'));
$allowedTypes = self::toSafeArray($allowedTypes);
foreach ($allowedTypes as $allowedType)
{
// Trim any whitespace
$allowedType = trim($allowedType);
// Check if the allowed type is a MIME type
if (strpos($allowedType, '/') !== false)
{
// It's a MIME type, convert to associated extensions
$extensions = self::getExtensionsByMimeType($allowedType);
// Validate against each associated extension
foreach ($extensions as $extension)
{
if ($extension === $fileExtension)
{
return true;
}
}
} else
{
// It's a file extension, normalize and compare
$allowedExtension = ltrim(strtolower($allowedType), '.');
if ($allowedExtension === $fileExtension)
{
return true;
}
}
}
return false; // No valid extension found
}
/**
* Retrieves an array of file extensions that are associated with a given MIME type.
*
* This method loops through a predefined list of MIME types and their associated file extensions.
* If the specified MIME type matches any of the entries, the corresponding file extensions are collected.
*
* @param string $mimeType The MIME type for which to find associated file extensions.
*
* @return array An array of unique file extensions associated with the provided MIME type.
* Returns an empty array if no matching extensions are found or if the MIME type is empty.
*/
public static function getExtensionsByMimeType($mimeType)
{
// Initialize an array to hold the matching extensions
$matchingExtensions = [];
if (!$mimeType)
{
return $matchingExtensions;
}
// Loop through the mimes array
foreach (self::$mimes as $extension => $types)
{
// Ensure $types is an array
$types = (array) $types;
// Loop through each type
foreach ($types as $type)
{
// Use preg_match to handle wildcard types
if (preg_match('#' . str_replace(['*'], ['.*'], $mimeType) . '#', $type))
{
$matchingExtensions[] = strtolower($extension);
}
}
}
return array_unique(array_filter($matchingExtensions));
}
/**
* Test whether the given detected mime type is in allowed mime types
*
* @param string $detected_type The mime type to check Eg: application/zip
* @param array $allowed_types A list of allowed mime types Eg: ['application/zip', 'images/jpg']
*
* @return bool True on success
*/
public static function typeIsInTypes($detected_type, $allowed_types)
{
if (!$detected_type || !$allowed_types)
{
return;
}
$allowed_types = self::toSafeArray($allowed_types);
$detected_type = strtolower($detected_type);
foreach ($allowed_types as $allowed_type)
{
// Special case: Allow to use wildcard in mime types like: image/* - This requires to convert the asterisk character to regex pattern.
$allowed_type = str_replace('*', '.*', $allowed_type);
if (preg_match('#' . $allowed_type . '#', $detected_type))
{
return true;
}
}
}
/**
* Detect the filename's Mime type
*
* @param string $file The path to the file to be checked
*
* @return mixed the mime type detected false on error
*/
public static function detectFileType($file)
{
// If we can't detect anything mime is false
$mime = false;
try
{
if (function_exists('mime_content_type'))
{
$mime = mime_content_type($file);
}
elseif (function_exists('finfo_open'))
{
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime = finfo_file($finfo, $file);
finfo_close($finfo);
}
}
catch (\Exception $e)
{
}
return $mime;
}
private static function toSafeArray($subject)
{
if (!is_array($subject))
{
$subject = explode(',', $subject);
}
$subject = array_map('trim', $subject);
$subject = array_map('strtolower', $subject);
$subject = array_unique($subject);
$subject = array_filter($subject);
return $subject;
}
}