<?php
-/** Module defining helper functions for detecting and dealing with mime types.
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
*/
-
- /** 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.
- */
-define('MM_WELL_KNOWN_MIME_TYPES',<<<END_STRING
-application/ogg ogg ogm ogv
-application/pdf pdf
-application/vnd.oasis.opendocument.chart odc
-application/vnd.oasis.opendocument.chart-template otc
-application/vnd.oasis.opendocument.formula odf
-application/vnd.oasis.opendocument.formula-template otf
-application/vnd.oasis.opendocument.graphics odg
-application/vnd.oasis.opendocument.graphics-template otg
-application/vnd.oasis.opendocument.image odi
-application/vnd.oasis.opendocument.image-template oti
-application/vnd.oasis.opendocument.presentation odp
-application/vnd.oasis.opendocument.presentation-template otp
-application/vnd.oasis.opendocument.spreadsheet ods
-application/vnd.oasis.opendocument.spreadsheet-template ots
-application/vnd.oasis.opendocument.text odt
-application/vnd.oasis.opendocument.text-template ott
-application/vnd.oasis.opendocument.text-master otm
-application/vnd.oasis.opendocument.text-web oth
-application/x-javascript js
-application/x-shockwave-flash swf
-audio/midi mid midi kar
-audio/mpeg mpga mpa mp2 mp3
-audio/x-aiff aif aiff aifc
-audio/x-wav wav
-audio/ogg ogg
-image/x-bmp bmp
-image/gif gif
-image/jpeg jpeg jpg jpe
-image/png png
-image/svg+xml image/svg svg
-image/tiff tiff tif
-image/vnd.djvu image/x.djvu image/x-djvu djvu
-image/x-portable-pixmap ppm
-image/x-xcf xcf
-text/plain txt
-text/html html htm
-video/ogg ogm ogg ogv
-video/mpeg mpg mpeg
-END_STRING
-);
-
- /** 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.
- */
-define('MM_WELL_KNOWN_MIME_INFO', <<<END_STRING
-application/pdf [OFFICE]
-application/vnd.oasis.opendocument.chart [OFFICE]
-application/vnd.oasis.opendocument.chart-template [OFFICE]
-application/vnd.oasis.opendocument.formula [OFFICE]
-application/vnd.oasis.opendocument.formula-template [OFFICE]
-application/vnd.oasis.opendocument.graphics [OFFICE]
-application/vnd.oasis.opendocument.graphics-template [OFFICE]
-application/vnd.oasis.opendocument.image [OFFICE]
-application/vnd.oasis.opendocument.image-template [OFFICE]
-application/vnd.oasis.opendocument.presentation [OFFICE]
-application/vnd.oasis.opendocument.presentation-template [OFFICE]
-application/vnd.oasis.opendocument.spreadsheet [OFFICE]
-application/vnd.oasis.opendocument.spreadsheet-template [OFFICE]
-application/vnd.oasis.opendocument.text [OFFICE]
-application/vnd.oasis.opendocument.text-template [OFFICE]
-application/vnd.oasis.opendocument.text-master [OFFICE]
-application/vnd.oasis.opendocument.text-web [OFFICE]
-text/javascript application/x-javascript [EXECUTABLE]
-application/x-shockwave-flash [MULTIMEDIA]
-audio/midi [AUDIO]
-audio/x-aiff [AUDIO]
-audio/x-wav [AUDIO]
-audio/mp3 audio/mpeg [AUDIO]
-application/ogg audio/ogg video/ogg [MULTIMEDIA]
-image/x-bmp image/bmp [BITMAP]
-image/gif [BITMAP]
-image/jpeg [BITMAP]
-image/png [BITMAP]
-image/svg+xml [DRAWING]
-image/tiff [BITMAP]
-image/vnd.djvu [BITMAP]
-image/x-xcf [BITMAP]
-image/x-portable-pixmap [BITMAP]
-text/plain [TEXT]
-text/html [TEXT]
-video/ogg [VIDEO]
-video/mpeg [VIDEO]
-unknown/unknown application/octet-stream application/x-empty [UNKNOWN]
-END_STRING
-);
-
-#note: because this file is possibly included by a function,
-#we need to access the global scope explicitely!
-global $wgLoadFileinfoExtension;
-
-if ($wgLoadFileinfoExtension) {
- if(!extension_loaded('fileinfo')) dl('fileinfo.' . PHP_SHLIB_SUFFIX);
-}
+use MediaWiki\MediaWikiServices;
+use Wikimedia\Assert\Assert;
/**
- * Implements functions related to mime types such as detection and mapping to
- * file extension.
- *
- * Instances of this class are stateles, there only needs to be one global instance
- * of MimeMagic. Please use MimeMagic::singleton() to get that instance.
+ * @deprecated since 1.29
+ * MimeAnalyzer should be used instead of MimeMagic
*/
-class MimeMagic {
-
- /**
- * Mapping of media types to arrays of mime types.
- * This is used by findMediaType and getMediaType, respectively
- */
- var $mMediaTypes= NULL;
-
- /** Map of mime type aliases
- */
- var $mMimeTypeAliases= NULL;
-
- /** map of mime types to file extensions (as a space seprarated list)
- */
- var $mMimeToExt= NULL;
-
- /** map of file extensions types to mime types (as a space seprarated list)
- */
- var $mExtToMime= NULL;
-
- /** IEContentAnalyzer instance
- */
- var $mIEAnalyzer;
-
- /** The singleton instance
- */
- private static $instance;
-
- /** Initializes the MimeMagic object. This is called by MimeMagic::singleton().
- *
- * This constructor parses the mime.types and mime.info files and build internal mappings.
- */
- function __construct() {
- /*
- * --- load mime.types ---
- */
-
- global $wgMimeTypeFile, $IP;
-
- $types = MM_WELL_KNOWN_MIME_TYPES;
-
- if ( $wgMimeTypeFile == 'includes/mime.types' ) {
- $wgMimeTypeFile = "$IP/$wgMimeTypeFile";
- }
-
- if ( $wgMimeTypeFile ) {
- if ( is_file( $wgMimeTypeFile ) and is_readable( $wgMimeTypeFile ) ) {
- wfDebug( __METHOD__.": loading mime types from $wgMimeTypeFile\n" );
- $types .= "\n";
- $types .= file_get_contents( $wgMimeTypeFile );
- } else {
- wfDebug( __METHOD__.": can't load mime types from $wgMimeTypeFile\n" );
- }
- } else {
- wfDebug( __METHOD__.": no mime types file defined, using build-ins only.\n" );
- }
-
- $types = str_replace( array( "\r\n", "\n\r", "\n\n", "\r\r", "\r" ), "\n", $types );
- $types = str_replace( "\t", " ", $types );
-
- $this->mMimeToExt = array();
- $this->mToMime = array();
-
- $lines = explode( "\n",$types );
- foreach ( $lines as $s ) {
- $s = trim( $s );
- if ( empty( $s ) ) continue;
- if ( strpos( $s, '#' ) === 0 ) continue;
-
- $s = strtolower( $s );
- $i = strpos( $s, ' ' );
-
- if ( $i === false ) continue;
-
- #print "processing MIME line $s<br>";
-
- $mime = substr( $s, 0, $i );
- $ext = trim( substr($s, $i+1 ) );
-
- if ( empty( $ext ) ) continue;
-
- if ( !empty( $this->mMimeToExt[$mime] ) ) {
- $this->mMimeToExt[$mime] .= ' ' . $ext;
- } else {
- $this->mMimeToExt[$mime] = $ext;
- }
-
- $extensions = explode( ' ', $ext );
-
- foreach ( $extensions as $e ) {
- $e = trim( $e );
- if ( empty( $e ) ) continue;
-
- if ( !empty( $this->mExtToMime[$e] ) ) {
- $this->mExtToMime[$e] .= ' ' . $mime;
- } else {
- $this->mExtToMime[$e] = $mime;
- }
- }
- }
-
- /*
- * --- load mime.info ---
- */
-
- global $wgMimeInfoFile;
- if ( $wgMimeInfoFile == 'includes/mime.info' ) {
- $wgMimeInfoFile = "$IP/$wgMimeInfoFile";
- }
-
- $info = MM_WELL_KNOWN_MIME_INFO;
-
- if ( $wgMimeInfoFile ) {
- if ( is_file( $wgMimeInfoFile ) and is_readable( $wgMimeInfoFile ) ) {
- wfDebug( __METHOD__.": loading mime info from $wgMimeInfoFile\n" );
- $info .= "\n";
- $info .= file_get_contents( $wgMimeInfoFile );
- } else {
- wfDebug(__METHOD__.": can't load mime info from $wgMimeInfoFile\n");
- }
- } else {
- wfDebug(__METHOD__.": no mime info file defined, using build-ins only.\n");
- }
-
- $info = str_replace( array( "\r\n", "\n\r", "\n\n", "\r\r", "\r" ), "\n", $info);
- $info = str_replace( "\t", " ", $info );
-
- $this->mMimeTypeAliases = array();
- $this->mMediaTypes = array();
-
- $lines = explode( "\n", $info );
- foreach ( $lines as $s ) {
- $s = trim( $s );
- if ( empty( $s ) ) continue;
- if ( strpos( $s, '#' ) === 0 ) continue;
-
- $s = strtolower( $s );
- $i = strpos( $s, ' ' );
-
- if ( $i === false ) continue;
-
- #print "processing MIME INFO line $s<br>";
-
- $match = array();
- if ( preg_match( '!\[\s*(\w+)\s*\]!', $s, $match ) ) {
- $s = preg_replace( '!\[\s*(\w+)\s*\]!', '', $s );
- $mtype = trim( strtoupper( $match[1] ) );
- } else {
- $mtype = MEDIATYPE_UNKNOWN;
- }
-
- $m = explode( ' ', $s );
-
- if ( !isset( $this->mMediaTypes[$mtype] ) ) {
- $this->mMediaTypes[$mtype] = array();
- }
-
- foreach ( $m as $mime ) {
- $mime = trim( $mime );
- if ( empty( $mime ) ) continue;
-
- $this->mMediaTypes[$mtype][] = $mime;
- }
-
- if ( sizeof( $m ) > 1 ) {
- $main = $m[0];
- for ( $i=1; $i<sizeof($m); $i += 1 ) {
- $mime = $m[$i];
- $this->mMimeTypeAliases[$mime] = $main;
- }
- }
- }
-
- }
-
+class MimeMagic extends MimeAnalyzer {
/**
* Get an instance of this class
+ * @return MimeMagic
+ * @deprecated since 1.28 get a MimeAnalyzer instance from MediaWikiServices
*/
- static function &singleton() {
- if ( !isset( self::$instance ) ) {
- self::$instance = new MimeMagic;
- }
- return self::$instance;
- }
-
- /** returns a list of file extensions for a given mime type
- * as a space separated string.
- */
- function getExtensionsForType( $mime ) {
- $mime = strtolower( $mime );
-
- $r = @$this->mMimeToExt[$mime];
-
- if ( @!$r and isset( $this->mMimeTypeAliases[$mime] ) ) {
- $mime = $this->mMimeTypeAliases[$mime];
- $r = @$this->mMimeToExt[$mime];
- }
-
- return $r;
- }
-
- /** returns a list of mime types for a given file extension
- * as a space separated string.
- */
- function getTypesForExtension( $ext ) {
- $ext = strtolower( $ext );
-
- $r = isset( $this->mExtToMime[$ext] ) ? $this->mExtToMime[$ext] : null;
- return $r;
- }
-
- /** returns a single mime type for a given file extension.
- * This is always the first type from the list returned by getTypesForExtension($ext).
- */
- function guessTypesForExtension( $ext ) {
- $m = $this->getTypesForExtension( $ext );
- if ( is_null( $m ) ) return NULL;
-
- $m = trim( $m );
- $m = preg_replace( '/\s.*$/', '', $m );
-
- return $m;
- }
-
-
- /** 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.
- */
- function isMatchingExtension( $extension, $mime ) {
- $ext = $this->getExtensionsForType( $mime );
-
- if ( !$ext ) {
- return NULL; //unknown
- }
-
- $ext = explode( ' ', $ext );
-
- $extension = strtolower( $extension );
- if ( in_array( $extension, $ext ) ) {
- return true;
- }
-
- return false;
- }
-
- /** returns true if the mime type is known to represent
- * an image format supported by the PHP GD library.
- */
- function isPHPImageType( $mime ) {
- #as defined by imagegetsize and image_type_to_mime
- static $types = array(
- 'image/gif', 'image/jpeg', 'image/png',
- 'image/x-bmp', 'image/xbm', 'image/tiff',
- 'image/jp2', 'image/jpeg2000', 'image/iff',
- 'image/xbm', 'image/x-xbitmap',
- 'image/vnd.wap.wbmp', 'image/vnd.xiff',
- 'image/x-photoshop',
- 'application/x-shockwave-flash',
+ public static function singleton() {
+ // XXX: We know that the MimeAnalyzer is currently an instance of MimeMagic
+ $instance = MediaWikiServices::getInstance()->getMimeAnalyzer();
+ Assert::postcondition(
+ $instance instanceof MimeMagic,
+ __METHOD__ . ' should return an instance of ' . self::class
);
-
- return in_array( $mime, $types );
- }
-
- /**
- * 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.
- * @return bool
- */
- function isRecognizableExtension( $extension ) {
- static $types = array(
- // Types recognized by getimagesize()
- 'gif', 'jpeg', 'jpg', 'png', 'swf', 'psd',
- 'bmp', 'tiff', 'tif', 'jpc', 'jp2',
- 'jpx', 'jb2', 'swc', 'iff', 'wbmp',
- 'xbm',
-
- // Formats we recognize magic numbers for
- 'djvu', 'ogg', 'ogv', 'mid', 'pdf', 'wmf', 'xcf',
-
- // XML formats we sure hope we recognize reliably
- 'svg',
- );
- return in_array( strtolower( $extension ), $types );
- }
-
-
- /** 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 misinterpreter by the default mime detection (namely xml based formats like XHTML or SVG).
- *
- * @param string $file The file to check
- * @param mixed $ext The file extension, or true to extract it from the filename.
- * Set it to false to ignore the extension.
- *
- * @return string the mime type of $file
- */
- function guessMimeType( $file, $ext = true ) {
- $mime = $this->doGuessMimeType( $file, $ext );
-
- if( !$mime ) {
- wfDebug( __METHOD__.": internal type detection failed for $file (.$ext)...\n" );
- $mime = $this->detectMimeType( $file, $ext );
- }
-
- if ( isset( $this->mMimeTypeAliases[$mime] ) ) {
- $mime = $this->mMimeTypeAliases[$mime];
- }
-
- wfDebug(__METHOD__.": final mime type of $file: $mime\n");
- return $mime;
- }
-
- function doGuessMimeType( $file, $ext = true ) {
- // Read a chunk of the file
- wfSuppressWarnings();
- $f = fopen( $file, "rt" );
- wfRestoreWarnings();
- if( !$f ) return "unknown/unknown";
- $head = fread( $f, 1024 );
- fseek( $f, -65558, SEEK_END );
- $tail = fread( $f, 65558 ); // 65558 = maximum size of a zip EOCDR
- fclose( $f );
-
- // Hardcode a few magic number checks...
- $headers = array(
- // Multimedia...
- 'MThd' => 'audio/midi',
- 'OggS' => 'application/ogg',
-
- // Image formats...
- // Note that WMF may have a bare header, no magic number.
- "\x01\x00\x09\x00" => 'application/x-msmetafile', // Possibly prone to false positives?
- "\xd7\xcd\xc6\x9a" => 'application/x-msmetafile',
- '%PDF' => 'application/pdf',
- 'gimp xcf' => 'image/x-xcf',
-
- // Some forbidden fruit...
- 'MZ' => 'application/octet-stream', // DOS/Windows executable
- "\xca\xfe\xba\xbe" => 'application/octet-stream', // Mach-O binary
- "\x7fELF" => 'application/octet-stream', // ELF binary
- );
-
- foreach( $headers as $magic => $candidate ) {
- if( strncmp( $head, $magic, strlen( $magic ) ) == 0 ) {
- wfDebug( __METHOD__ . ": magic header in $file recognized as $candidate\n" );
- return $candidate;
- }
- }
-
- /*
- * look for PHP
- * Check for this before HTML/XML...
- * Warning: this is a heuristic, and won't match a file with a lot of non-PHP before.
- * It will also match text files which could be PHP. :)
- */
- if( ( strpos( $head, '<?php' ) !== false ) ||
- ( strpos( $head, '<? ' ) !== false ) ||
- ( strpos( $head, "<?\n" ) !== false ) ||
- ( strpos( $head, "<?\t" ) !== false ) ||
- ( strpos( $head, "<?=" ) !== false ) ||
-
- ( strpos( $head, "<\x00?\x00p\x00h\x00p" ) !== false ) ||
- ( strpos( $head, "<\x00?\x00 " ) !== false ) ||
- ( strpos( $head, "<\x00?\x00\n" ) !== false ) ||
- ( strpos( $head, "<\x00?\x00\t" ) !== false ) ||
- ( strpos( $head, "<\x00?\x00=" ) !== false ) ) {
-
- wfDebug( __METHOD__ . ": recognized $file as application/x-php\n" );
- return "application/x-php";
- }
-
- /*
- * look for XML formats (XHTML and SVG)
- */
- $xml = new XmlTypeCheck( $file );
- if( $xml->wellFormed ) {
- global $wgXMLMimeTypes;
- if( isset( $wgXMLMimeTypes[$xml->getRootElement()] ) ) {
- return $wgXMLMimeTypes[$xml->getRootElement()];
- } else {
- return 'application/xml';
- }
- }
-
- /*
- * look for shell scripts
- */
- $script_type = NULL;
-
- # detect by shebang
- if ( substr( $head, 0, 2) == "#!" ) {
- $script_type = "ASCII";
- } elseif ( substr( $head, 0, 5) == "\xef\xbb\xbf#!" ) {
- $script_type = "UTF-8";
- } elseif ( substr( $head, 0, 7) == "\xfe\xff\x00#\x00!" ) {
- $script_type = "UTF-16BE";
- } elseif ( substr( $head, 0, 7 ) == "\xff\xfe#\x00!" ) {
- $script_type= "UTF-16LE";
- }
-
- if ( $script_type ) {
- if ( $script_type !== "UTF-8" && $script_type !== "ASCII") {
- // Quick and dirty fold down to ASCII!
- $pack = array( 'UTF-16BE' => 'n*', 'UTF-16LE' => 'v*' );
- $chars = unpack( $pack[$script_type], substr( $head, 2 ) );
- $head = '';
- foreach( $chars as $codepoint ) {
- if( $codepoint < 128 ) {
- $head .= chr( $codepoint );
- } else {
- $head .= '?';
- }
- }
- }
-
- $match = array();
-
- if ( preg_match( '%/?([^\s]+/)(\w+)%', $head, $match ) ) {
- $mime = "application/x-{$match[2]}";
- wfDebug( __METHOD__.": shell script recognized as $mime\n" );
- return $mime;
- }
- }
-
- // Check for ZIP (before getimagesize)
- if ( strpos( $tail, "PK\x05\x06" ) !== false ) {
- wfDebug( __METHOD__.": ZIP header present at end of $file\n" );
- return $this->detectZipType( $head );
- }
-
- wfSuppressWarnings();
- $gis = getimagesize( $file );
- wfRestoreWarnings();
-
- if( $gis && isset( $gis['mime'] ) ) {
- $mime = $gis['mime'];
- wfDebug( __METHOD__.": getimagesize detected $file as $mime\n" );
- return $mime;
- }
-
- // Also test DjVu
- $deja = new DjVuImage( $file );
- if( $deja->isValid() ) {
- wfDebug( __METHOD__.": detected $file as image/vnd.djvu\n" );
- return 'image/vnd.djvu';
- }
-
- return false;
- }
-
- /**
- * Detect application-specific file type of a given ZIP file from its
- * header data. Currently works for OpenDocument types...
- * If can't tell, returns 'application/zip'.
- *
- * @param string $header Some reasonably-sized chunk of file header
- * @return string
- */
- function detectZipType( $header ) {
- $opendocTypes = array(
- 'chart',
- 'chart-template',
- 'formula',
- 'formula-template',
- 'graphics',
- 'graphics-template',
- 'image',
- 'image-template',
- 'presentation',
- 'presentation-template',
- 'spreadsheet',
- 'spreadsheet-template',
- 'text',
- 'text-template',
- 'text-master',
- 'text-web' );
-
- // http://lists.oasis-open.org/archives/office/200505/msg00006.html
- $types = '(?:' . implode( '|', $opendocTypes ) . ')';
- $opendocRegex = "/^mimetype(application\/vnd\.oasis\.opendocument\.$types)/";
- wfDebug( __METHOD__.": $opendocRegex\n" );
-
- if( preg_match( $opendocRegex, substr( $header, 30 ), $matches ) ) {
- $mime = $matches[1];
- wfDebug( __METHOD__.": detected $mime from ZIP archive\n" );
- return $mime;
- } else {
- wfDebug( __METHOD__.": unable to identify type of ZIP archive\n" );
- return 'application/zip';
- }
- }
-
- /** Internal mime type detection, please use guessMimeType() for application code instead.
- * Detection is done using an external program, if $wgMimeDetectorCommand is set.
- * Otherwise, the fileinfo extension and mime_content_type are tried (in this order), if they are available.
- * If the dections 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".
- *
- * @param string $file The file to check
- * @param mixed $ext The file extension, or true to extract it from the filename.
- * Set it to false to ignore the extension.
- *
- * @return string the mime type of $file
- * @access private
- */
- function detectMimeType( $file, $ext = true ) {
- global $wgMimeDetectorCommand;
-
- $m = NULL;
- if ( $wgMimeDetectorCommand ) {
- $fn = wfEscapeShellArg( $file );
- $m = `$wgMimeDetectorCommand $fn`;
- } elseif ( function_exists( "finfo_open" ) && function_exists( "finfo_file" ) ) {
-
- # This required the fileinfo extension by PECL,
- # see http://pecl.php.net/package/fileinfo
- # This must be compiled into PHP
- #
- # finfo is the official replacement for the deprecated
- # mime_content_type function, see below.
- #
- # If you may need to load the fileinfo extension at runtime, set
- # $wgLoadFileinfoExtension in LocalSettings.php
-
- $mime_magic_resource = finfo_open(FILEINFO_MIME); /* return mime type ala mimetype extension */
-
- if ($mime_magic_resource) {
- $m = finfo_file( $mime_magic_resource, $file );
- finfo_close( $mime_magic_resource );
- } else {
- wfDebug( __METHOD__.": finfo_open failed on ".FILEINFO_MIME."!\n" );
- }
- } elseif ( function_exists( "mime_content_type" ) ) {
-
- # NOTE: this function is available since PHP 4.3.0, but only if
- # PHP was compiled with --with-mime-magic or, before 4.3.2, with --enable-mime-magic.
- #
- # On Windows, you must set mime_magic.magicfile in php.ini to point to the mime.magic file bundeled with PHP;
- # sometimes, this may even be needed under linus/unix.
- #
- # Also note that this has been DEPRECATED in favor of the fileinfo extension by PECL, see above.
- # see http://www.php.net/manual/en/ref.mime-magic.php for details.
-
- $m = mime_content_type($file);
- } else {
- wfDebug( __METHOD__.": no magic mime detector found!\n" );
- }
-
- if ( $m ) {
- # normalize
- $m = preg_replace( '![;, ].*$!', '', $m ); #strip charset, etc
- $m = trim( $m );
- $m = strtolower( $m );
-
- if ( strpos( $m, 'unknown' ) !== false ) {
- $m = NULL;
- } else {
- wfDebug( __METHOD__.": magic mime type of $file: $m\n" );
- return $m;
- }
- }
-
- # if desired, look at extension as a fallback.
- if ( $ext === true ) {
- $i = strrpos( $file, '.' );
- $ext = strtolower( $i ? substr( $file, $i + 1 ) : '' );
- }
- if ( $ext ) {
- if( $this->isRecognizableExtension( $ext ) ) {
- wfDebug( __METHOD__. ": refusing to guess mime type for .$ext file, we should have recognized it\n" );
- } else {
- $m = $this->guessTypesForExtension( $ext );
- if ( $m ) {
- wfDebug( __METHOD__.": extension mime type of $file: $m\n" );
- return $m;
- }
- }
- }
-
- #unknown type
- wfDebug( __METHOD__.": failed to guess mime type for $file!\n" );
- return "unknown/unknown";
- }
-
- /**
- * 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
- * @todo look at multiple extension, separately and together.
- *
- * @param 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).
- * @param string $mime mime type. If null it will be guessed using guessMimeType.
- *
- * @return (int?string?) a value to be used with the MEDIATYPE_xxx constants.
- */
- function getMediaType( $path = NULL, $mime = NULL ) {
- if( !$mime && !$path ) return MEDIATYPE_UNKNOWN;
-
- # If mime type is unknown, guess it
- if( !$mime ) $mime = $this->guessMimeType( $path, false );
-
- # Special code for ogg - detect if it's video (theora),
- # else label it as sound.
- if( $mime == "application/ogg" && file_exists( $path ) ) {
-
- // Read a chunk of the file
- $f = fopen( $path, "rt" );
- if ( !$f ) return MEDIATYPE_UNKNOWN;
- $head = fread( $f, 256 );
- fclose( $f );
-
- $head = strtolower( $head );
-
- # This is an UGLY HACK, file should be parsed correctly
- if ( strpos( $head, 'theora' ) !== false ) return MEDIATYPE_VIDEO;
- elseif ( strpos( $head, 'vorbis' ) !== false ) return MEDIATYPE_AUDIO;
- elseif ( strpos( $head, 'flac' ) !== false ) return MEDIATYPE_AUDIO;
- elseif ( strpos( $head, 'speex' ) !== false ) return MEDIATYPE_AUDIO;
- else return MEDIATYPE_MULTIMEDIA;
- }
-
- # check for entry for full mime type
- if( $mime ) {
- $type = $this->findMediaType( $mime );
- if( $type !== MEDIATYPE_UNKNOWN ) return $type;
- }
-
- # Check for entry for file extension
- $e = NULL;
- if ( $path ) {
- $i = strrpos( $path, '.' );
- $e = strtolower( $i ? substr( $path, $i + 1 ) : '' );
-
- # TODO: look at multi-extension if this fails, parse from full path
-
- $type = $this->findMediaType( '.' . $e );
- if ( $type !== MEDIATYPE_UNKNOWN ) return $type;
- }
-
- # Check major mime type
- if( $mime ) {
- $i = strpos( $mime, '/' );
- if( $i !== false ) {
- $major = substr( $mime, 0, $i );
- $type = $this->findMediaType( $major );
- if( $type !== MEDIATYPE_UNKNOWN ) return $type;
- }
- }
-
- if( !$type ) $type = MEDIATYPE_UNKNOWN;
-
- return $type;
- }
-
- /** 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 funktion relies on the mapping defined by $this->mMediaTypes
- * @access private
- */
- function findMediaType( $extMime ) {
- if ( strpos( $extMime, '.' ) === 0 ) { #if it's an extension, look up the mime types
- $m = $this->getTypesForExtension( substr( $extMime, 1 ) );
- if ( !$m ) return MEDIATYPE_UNKNOWN;
-
- $m = explode( ' ', $m );
- } else {
- # Normalize mime type
- if ( isset( $this->mMimeTypeAliases[$extMime] ) ) {
- $extMime = $this->mMimeTypeAliases[$extMime];
- }
-
- $m = array($extMime);
- }
-
- foreach ( $m as $mime ) {
- foreach ( $this->mMediaTypes as $type => $codes ) {
- if ( in_array($mime, $codes, true ) ) {
- return $type;
- }
- }
- }
-
- return MEDIATYPE_UNKNOWN;
- }
-
- /**
- * Get the MIME types that various versions of Internet Explorer would
- * detect from a chunk of the content.
- *
- * @param string $fileName The file name (unused at present)
- * @param string $chunk The first 256 bytes of the file
- * @param string $proposed The MIME type proposed by the server
- */
- public function getIEMimeTypes( $fileName, $chunk, $proposed ) {
- $ca = $this->getIEContentAnalyzer();
- return $ca->getRealMimesFromData( $fileName, $chunk, $proposed );
- }
-
- /**
- * Get a cached instance of IEContentAnalyzer
- */
- protected function getIEContentAnalyzer() {
- if ( is_null( $this->mIEAnalyzer ) ) {
- $this->mIEAnalyzer = new IEContentAnalyzer;
- }
- return $this->mIEAnalyzer;
+ return $instance;
}
}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff