Implements functions related to MIME types such as detection and mapping to file extension. More...

Inheritance diagram for MimeAnalyzer:

Collaboration diagram for MimeAnalyzer:

Public Member Functions
	__construct (array $params)

	addExtraInfo ($info)
	Adds to the list mapping MIME to media type. More...

	addExtraTypes ($types)
	Adds to the list mapping MIME to file extensions. More...

	detectZipType ($header, $tail=null, $ext=false)
	Detect application-specific file type of a given ZIP file from its header data. More...

	findMediaType ($extMime)
	Returns a media code matching the given MIME type or file extension. More...

	getExtensionsForType ($mime)
	Returns a list of file extensions for a given MIME type as a space separated string or null if the MIME type was unrecognized. More...

	getIEMimeTypes ($fileName, $chunk, $proposed)
	Get the MIME types that various versions of Internet Explorer would detect from a chunk of the content. More...

	getMediaType ($path=null, $mime=null)
	Determine the media type code for a file, using its MIME type, name and possibly its contents. More...

	getTypesForExtension ($ext)
	Returns a list of MIME types for a given file extension as a space separated string or null if the extension was unrecognized. More...

	guessMimeType ($file, $ext=true)
	MIME type detection. More...

	guessTypesForExtension ($ext)
	Returns a single MIME type for a given file extension or null if unknown. More...

	improveTypeFromExtension ($mime, $ext)
	Improves a MIME type using the file extension. More...

	isMatchingExtension ($extension, $mime)
	Tests if the extension matches the given MIME type. More...

	isPHPImageType ($mime)
	Returns true if the MIME type is known to represent an image format supported by the PHP GD library. More...

	isRecognizableExtension ($extension)
	Returns true if the extension represents a type which can be reliably detected from its content. More...

	setLogger (LoggerInterface $logger)

Public Attributes
array	$mExtToMime = null
	Map of file extensions types to MIME types (as a space separated list) More...

Protected Member Functions
	getIEContentAnalyzer ()
	Get a cached instance of IEContentAnalyzer. More...

	loadFiles ()

Protected Attributes
callable	$detectCallback

callable	$extCallback

callable	$guessCallback

IEContentAnalyzer	$IEAnalyzer

string	$infoFile

callable	$initCallback

array	$mediaTypes = null
	Mapping of media types to arrays of MIME types. More...

array	$mimetoExt = null
	Map of MIME types to file extensions (as a space separated list) More...

array	$mimeTypeAliases = null
	Map of MIME type aliases. More...

string	$typeFile

string	$xmlTypes

Static Protected Attributes
static	$wellKnownInfo
	Defines a set of well known MIME info entries This is used as a fallback to mime.info files. More...

static	$wellKnownTypes
	Defines a set of well known MIME types This is used as a fallback to mime.types files. More...

Private Member Functions
	detectMimeType ($file, $ext=true)
	Internal MIME type detection. More...

	doGuessMimeType ($file, $ext)
	Guess the MIME type from the file contents. More...

Private Attributes
string	$extraInfo = ''
	Extra MIME info, set for example by media handling extensions. More...

string	$extraTypes = ''
	Extra MIME types, set for example by media handling extensions. More...

LoggerInterface	$logger

Detailed Description

Implements functions related to MIME types such as detection and mapping to file extension.

Since: 1.28

Definition at line 30 of file MimeAnalyzer.php.

Constructor & Destructor Documentation

MimeAnalyzer::__construct ( array $params )

Parameters

array

$params

Configuration map, includes:

typeFile: path to file with the list of known MIME types
infoFile: path to file with the MIME type info
xmlTypes: map of root element names to XML MIME types
initCallback: initialization callback that is passed this object [optional]
detectCallback: alternative to finfo that returns the mime type for a file. For example, the callback can return the output of "file -bi". [optional]
guessCallback: callback to improve the guessed MIME type using the file data. This is intended for fixing mistakes in fileinfo or "detectCallback". [optional]
extCallback: callback to improve the guessed MIME type using the extension. [optional]
logger: PSR-3 logger [optional]

Note: Constructing these instances is expensive due to file reads. A service or singleton pattern should be used to avoid creating instances again and again.

Definition at line 193 of file MimeAnalyzer.php.

References loadFiles().

Member Function Documentation

MimeAnalyzer::addExtraInfo ( $info )

Adds to the list mapping MIME to media type.

As an extension author, you are encouraged to submit patches to MediaWiki's core to add new MIME info to mime.info.

Parameters

string $info

Definition at line 398 of file MimeAnalyzer.php.

MimeAnalyzer::addExtraTypes ( $types )

Adds to the list mapping MIME to file extensions.

As an extension author, you are encouraged to submit patches to MediaWiki's core to add new MIME types to mime.types.

Parameters

string $types

Definition at line 388 of file MimeAnalyzer.php.

MimeAnalyzer::detectMimeType	(	$file,
		$ext = `true`
	)

private

Internal MIME type detection.

Detection is done using the fileinfo extension if it is available. It can be overriden by callback, which could use an external program, for example. If detection fails and $ext is not false, the MIME type is guessed from the file extension, using guessTypesForExtension.

If the MIME type is still unknown, getimagesize is used to detect the MIME type if the file is an image. If no MIME type can be determined, this function returns 'unknown/unknown'.

Parameters

string	$file	The file to check
string \| bool	$ext	The file extension, or true (default) to extract it from the filename. Set it to false to ignore the extension. DEPRECATED! Set to false, use improveTypeFromExtension($mime, $ext) later to improve MIME type.

Returns: string The MIME type of $file

Definition at line 945 of file MimeAnalyzer.php.

References $detectCallback, $ext, etc, guessTypesForExtension(), and isRecognizableExtension().

Referenced by guessMimeType().

MimeAnalyzer::detectZipType	(	$header,
		$tail = `null`,
		$ext = `false`
	)

Detect application-specific file type of a given ZIP file from its header data.

Currently works for OpenDocument and OpenXML types... If can't tell, returns 'application/zip'.

Parameters

string	$header	Some reasonably-sized chunk of file header
string \| null	$tail	The tail of the file
string \| bool	$ext	The file extension, or true to extract it from the filename. Set it to false (default) to ignore the extension. DEPRECATED! Set to false, use improveTypeFromExtension($mime, $ext) later to improve MIME type.

Returns: string

Definition at line 838 of file MimeAnalyzer.php.

References $ext, $header, $matches, $mime, guessTypesForExtension(), and isMatchingExtension().

Referenced by doGuessMimeType().

MimeAnalyzer::doGuessMimeType	(	$file,
		$ext
	)

private

Guess the MIME type from the file contents.

Todo:: Remove $ext param

Parameters

string	$file
mixed	$ext

Returns: bool|string

Exceptions

UnexpectedValueException

Definition at line 640 of file MimeAnalyzer.php.

References $ext, $guessCallback, $mime, $xmlTypes, as, and detectZipType().

Referenced by guessMimeType().

MimeAnalyzer::findMediaType ( $extMime )

Returns a media code matching the given MIME type or file extension.

File extensions are represented by a string starting with a dot (.) to distinguish them from MIME types.

This function relies on the mapping defined by $this->mMediaTypes

Access:: private

Parameters

string $extMime

Returns: int|string

Definition at line 1112 of file MimeAnalyzer.php.

References $mime, $type, as, getTypesForExtension(), and MEDIATYPE_UNKNOWN.

Referenced by getMediaType(), and improveTypeFromExtension().

MimeAnalyzer::getExtensionsForType ( $mime )

Returns a list of file extensions for a given MIME type as a space separated string or null if the MIME type was unrecognized.

Resolves MIME type aliases.

Parameters

string $mime

Returns: string|null

Definition at line 410 of file MimeAnalyzer.php.

References $mime.

Referenced by isMatchingExtension().

MimeAnalyzer::getIEContentAnalyzer ( )

protected

Get a cached instance of IEContentAnalyzer.

Returns: IEContentAnalyzer

Definition at line 1160 of file MimeAnalyzer.php.

References $IEAnalyzer.

Referenced by getIEMimeTypes().

MimeAnalyzer::getIEMimeTypes	(	$fileName,
		$chunk,
		$proposed
	)

Get the MIME types that various versions of Internet Explorer would detect from a chunk of the content.

Parameters

string	$fileName	The file name (unused at present)
string	$chunk	The first 256 bytes of the file
string	$proposed	The MIME type proposed by the server

Returns: array

Definition at line 1150 of file MimeAnalyzer.php.

References getIEContentAnalyzer().

MimeAnalyzer::getMediaType	(	$path = `null`,
		$mime = `null`
	)

Determine the media type code for a file, using its MIME type, name and possibly its contents.

This function relies on the findMediaType(), mapping extensions and MIME types to media types.

Todo:

analyse file if need be

look at multiple extension, separately and together.

Parameters

string	$path	Full path to the image file, in case we have to look at the contents (if null, only the MIME type is used to determine the media type code).
string	$mime	MIME type. If null it will be guessed using guessMimeType.

Returns: string A value to be used with the MEDIATYPE_xxx constants.

Definition at line 1024 of file MimeAnalyzer.php.

References $e, $mime, $path, $type, findMediaType(), guessMimeType(), MEDIATYPE_AUDIO, MEDIATYPE_MULTIMEDIA, MEDIATYPE_UNKNOWN, and MEDIATYPE_VIDEO.

MimeAnalyzer::getTypesForExtension ( $ext )

Returns a list of MIME types for a given file extension as a space separated string or null if the extension was unrecognized.

Parameters

string $ext

Returns: string|null

Definition at line 436 of file MimeAnalyzer.php.

References $ext.

Referenced by findMediaType(), and guessTypesForExtension().

MimeAnalyzer::guessMimeType	(	$file,
		$ext = `true`
	)

MIME type detection.

This uses detectMimeType to detect the MIME type of the file, but applies additional checks to determine some well known file formats that may be missed or misinterpreted by the default MIME detection (namely XML based formats like XHTML or SVG, as well as ZIP based formats like OPC/ODF files).

Parameters

string	$file	The file to check
string \| bool	$ext	The file extension, or true (default) to extract it from the filename. Set it to false to ignore the extension. DEPRECATED! Set to false, use improveTypeFromExtension($mime, $ext) later to improve MIME type.

Returns: string The MIME type of $file

Definition at line 607 of file MimeAnalyzer.php.

References $ext, $mime, detectMimeType(), and doGuessMimeType().

Referenced by getMediaType().

MimeAnalyzer::guessTypesForExtension ( $ext )

Returns a single MIME type for a given file extension or null if unknown.

This is always the first type from the list returned by getTypesForExtension($ext).

Parameters

string $ext

Returns: string|null

Definition at line 450 of file MimeAnalyzer.php.

References $ext, and getTypesForExtension().

Referenced by detectMimeType(), detectZipType(), and improveTypeFromExtension().

MimeAnalyzer::improveTypeFromExtension	(	$mime,
		$ext
	)

Improves a MIME type using the file extension.

Some file formats are very generic, so their MIME type is not very meaningful. A more useful MIME type can be derived by looking at the file extension. Typically, this method would be called on the result of guessMimeType().

Parameters

string	$mime	The MIME type, typically guessed from a file's content.
string	$ext	The file extension, as taken from the file name

Returns: string The MIME type

Definition at line 550 of file MimeAnalyzer.php.

References $ext, $extCallback, $mime, findMediaType(), guessTypesForExtension(), isMatchingExtension(), isRecognizableExtension(), and MEDIATYPE_TEXT.

MimeAnalyzer::isMatchingExtension	(	$extension,
		$mime
	)

Tests if the extension matches the given MIME type.

Returns true if a match was found, null if the MIME type is unknown, and false if the MIME type is known but no matches where found.

Parameters

string	$extension
string	$mime

Returns: bool|null

Definition at line 472 of file MimeAnalyzer.php.

References $ext, $mime, and getExtensionsForType().

Referenced by detectZipType(), and improveTypeFromExtension().

MimeAnalyzer::isPHPImageType ( $mime )

Returns true if the MIME type is known to represent an image format supported by the PHP GD library.

Parameters

string $mime

Returns: bool

Definition at line 493 of file MimeAnalyzer.php.

References $mime.

MimeAnalyzer::isRecognizableExtension ( $extension )

Returns true if the extension represents a type which can be reliably detected from its content.

Use this to determine whether strict content checks should be applied to reject invalid uploads; if we can't identify the type we won't be able to say if it's invalid.

Todo:

Be more accurate when using fancy MIME detector plugins; right now this is the bare minimum getimagesize() list.

Parameters

string $extension

Returns: bool

Definition at line 520 of file MimeAnalyzer.php.

Referenced by detectMimeType(), and improveTypeFromExtension().

MimeAnalyzer::loadFiles ( )

protected

Definition at line 216 of file MimeAnalyzer.php.

References $e, $ext, $extensions, $extraInfo, $extraTypes, $infoFile, $lines, $mime, $s, $typeFile, as, and MEDIATYPE_UNKNOWN.

Referenced by __construct().

MimeAnalyzer::setLogger ( LoggerInterface $logger )

Definition at line 378 of file MimeAnalyzer.php.

References $logger.

Member Data Documentation

callable MimeAnalyzer::$detectCallback

protected

Definition at line 40 of file MimeAnalyzer.php.

Referenced by detectMimeType().

callable MimeAnalyzer::$extCallback

protected

Definition at line 44 of file MimeAnalyzer.php.

Referenced by improveTypeFromExtension().

string MimeAnalyzer::$extraInfo = ''

private

Extra MIME info, set for example by media handling extensions.

Definition at line 61 of file MimeAnalyzer.php.

Referenced by loadFiles().

string MimeAnalyzer::$extraTypes = ''

private

Extra MIME types, set for example by media handling extensions.

Definition at line 59 of file MimeAnalyzer.php.

Referenced by loadFiles().

callable MimeAnalyzer::$guessCallback

protected

Definition at line 42 of file MimeAnalyzer.php.

Referenced by doGuessMimeType().

IEContentAnalyzer MimeAnalyzer::$IEAnalyzer

protected

Definition at line 56 of file MimeAnalyzer.php.

Referenced by getIEContentAnalyzer().

string MimeAnalyzer::$infoFile

protected

Definition at line 34 of file MimeAnalyzer.php.

Referenced by loadFiles().

callable MimeAnalyzer::$initCallback

protected

Definition at line 38 of file MimeAnalyzer.php.

LoggerInterface MimeAnalyzer::$logger

private

Definition at line 64 of file MimeAnalyzer.php.

Referenced by MimeMagic\applyDefaultParameters(), and setLogger().

array MimeAnalyzer::$mediaTypes = null

protected

Mapping of media types to arrays of MIME types.

Definition at line 46 of file MimeAnalyzer.php.

array MimeAnalyzer::$mExtToMime = null

Map of file extensions types to MIME types (as a space separated list)

Definition at line 53 of file MimeAnalyzer.php.

array MimeAnalyzer::$mimetoExt = null

protected

Map of MIME types to file extensions (as a space separated list)

Definition at line 50 of file MimeAnalyzer.php.

array MimeAnalyzer::$mimeTypeAliases = null

protected

Map of MIME type aliases.

Definition at line 48 of file MimeAnalyzer.php.

string MimeAnalyzer::$typeFile

protected

Definition at line 32 of file MimeAnalyzer.php.

Referenced by loadFiles().

MimeAnalyzer::$wellKnownInfo

staticprotected

Defines a set of well known MIME info entries This is used as a fallback to mime.info files.

An extensive list of well known MIME types is provided by the file mime.info in the includes directory.

Definition at line 136 of file MimeAnalyzer.php.

MimeAnalyzer::$wellKnownTypes

staticprotected

Defines a set of well known MIME types This is used as a fallback to mime.types files.

An extensive list of well known MIME types is provided by the file mime.types in the includes directory.

This list concatenated with mime.types is used to create a MIME <-> ext map. Each line contains a MIME type followed by a space separated list of extensions. If multiple extensions for a single MIME type exist or if multiple MIME types exist for a single extension then in most cases MediaWiki assumes that the first extension following the MIME type is the canonical extension, and the first time a MIME type appears for a certain extension is considered the canonical MIME type.

(Note that appending the type file list to the end of self::$wellKnownTypes sucks because you can't redefine canonical types. This could be fixed by appending self::$wellKnownTypes behind type file list, but who knows what will break? In practice this probably isn't a problem anyway – Bryan)

Definition at line 85 of file MimeAnalyzer.php.

string MimeAnalyzer::$xmlTypes

protected

Definition at line 36 of file MimeAnalyzer.php.

Referenced by doGuessMimeType().

The documentation for this class was generated from the following file:

includes/libs/mime/MimeAnalyzer.php

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Static Protected Attributes

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation