<?php
-/** Module defining helper functions for detecting and dealing with mime types.
+/**
+ * Module defining helper functions for detecting and dealing with mime types.
*
- * @package MediaWiki
+ * 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
+/**
+ * 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 $wgMimeTypeFile to the end of MM_WELL_KNOWN_MIME_TYPES
+ * sucks because you can't redefine canonical types. This could be fixed by
+ * appending MM_WELL_KNOWN_MIME_TYPES behind $wgMimeTypeFile, but who knows
+ * what will break? In practice this probably isn't a problem anyway -- Bryan)
*/
define('MM_WELL_KNOWN_MIME_TYPES',<<<END_STRING
-application/ogg ogg ogm
+application/ogg ogx ogg ogm ogv oga spx
application/pdf pdf
+application/vnd.oasis.opendocument.chart odc
+application/vnd.oasis.opendocument.chart-template otc
+application/vnd.oasis.opendocument.database odb
+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-master otm
+application/vnd.oasis.opendocument.text-template ott
+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
+audio/ogg oga spx ogg
image/x-bmp bmp
image/gif gif
image/jpeg jpeg jpg jpe
image/png png
-image/svg+xml svg
+image/svg+xml svg
+image/svg svg
image/tiff tiff tif
image/vnd.djvu djvu
+image/x.djvu 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
+video/ogg ogv ogm ogg
video/mpeg mpg mpeg
END_STRING
);
- /** Defines a set of well known mime info entries
+/**
+ * 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.database [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-wav [AUDIO]
audio/mp3 audio/mpeg [AUDIO]
application/ogg audio/ogg video/ogg [MULTIMEDIA]
-image/x-bmp image/bmp [BITMAP]
+image/x-bmp image/x-ms-bmp image/bmp [BITMAP]
image/gif [BITMAP]
image/jpeg [BITMAP]
image/png [BITMAP]
-image/svg image/svg+xml [DRAWING]
+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]
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);
-}
-
-/** 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.
-* @package MediaWiki
-*/
+/**
+ * Implements functions related to mime types such as detection and mapping to
+ * file extension.
+ *
+ * Instances of this class are stateless, there only needs to be one global instance
+ * of MimeMagic. Please use MimeMagic::singleton() to get that instance.
+ */
class MimeMagic {
/**
* Mapping of media types to arrays of mime types.
* This is used by findMediaType and getMediaType, respectively
*/
- var $mMediaTypes= NULL;
+ var $mMediaTypes = null;
/** Map of mime type aliases
*/
- var $mMimeTypeAliases= NULL;
+ var $mMimeTypeAliases = null;
/** map of mime types to file extensions (as a space seprarated list)
*/
- var $mMimeToExt= NULL;
+ var $mMimeToExt = null;
/** map of file extensions types to mime types (as a space seprarated list)
*/
- var $mExtToMime= NULL;
+ var $mExtToMime = null;
+
+ /** IEContentAnalyzer instance
+ */
+ var $mIEAnalyzer;
/** The singleton instance
*/
private static $instance;
+ /** True if the fileinfo extension has been loaded
+ */
+ private static $extensionLoaded = false;
+
/** Initializes the MimeMagic object. This is called by MimeMagic::singleton().
- *
- * This constructor parses the mime.types and mime.info files and build internal mappings.
- */
+ *
+ * This constructor parses the mime.types and mime.info files and build internal mappings.
+ */
function __construct() {
- /*
+ /**
* --- load mime.types ---
*/
- global $wgMimeTypeFile;
+ global $wgMimeTypeFile, $IP, $wgLoadFileinfoExtension;
- $types= MM_WELL_KNOWN_MIME_TYPES;
+ $types = MM_WELL_KNOWN_MIME_TYPES;
- if ($wgMimeTypeFile) {
- if (is_file($wgMimeTypeFile) and is_readable($wgMimeTypeFile)) {
- wfDebug("MimeMagic::MimeMagic: loading mime types from $wgMimeTypeFile\n");
+ if ( $wgMimeTypeFile == 'includes/mime.types' ) {
+ $wgMimeTypeFile = "$IP/$wgMimeTypeFile";
+ }
- $types.= "\n";
- $types.= file_get_contents($wgMimeTypeFile);
- }
- else wfDebug("MimeMagic::MimeMagic: can't load mime types from $wgMimeTypeFile\n");
+ if ( $wgLoadFileinfoExtension && !self::$extensionLoaded ) {
+ self::$extensionLoaded = true;
+ wfDl( 'fileinfo' );
}
- else wfDebug("MimeMagic::MimeMagic: 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);
+ 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" );
+ }
- $this->mMimeToExt= array();
- $this->mToMime= array();
+ $types = str_replace( array( "\r\n", "\n\r", "\n\n", "\r\r", "\r" ), "\n", $types );
+ $types = str_replace( "\t", " ", $types );
- $lines= explode("\n",$types);
- foreach ($lines as $s) {
- $s= trim($s);
- if (empty($s)) continue;
- if (strpos($s,'#')===0) continue;
+ $this->mMimeToExt = array();
+ $this->mToMime = array();
- $s= strtolower($s);
- $i= strpos($s,' ');
+ $lines = explode( "\n",$types );
+ foreach ( $lines as $s ) {
+ $s = trim( $s );
+ if ( empty( $s ) ) {
+ continue;
+ }
+ if ( strpos( $s, '#' ) === 0 ) {
+ continue;
+ }
- if ($i===false) continue;
+ $s = strtolower( $s );
+ $i = strpos( $s, ' ' );
- #print "processing MIME line $s<br>";
+ if ( $i === false ) {
+ continue;
+ }
- $mime= substr($s,0,$i);
- $ext= trim(substr($s,$i+1));
+ $mime = substr( $s, 0, $i );
+ $ext = trim( substr($s, $i+1 ) );
- if (empty($ext)) continue;
+ if ( empty( $ext ) ) {
+ continue;
+ }
- if ( !empty($this->mMimeToExt[$mime])) $this->mMimeToExt[$mime] .= ' '.$ext;
- else $this->mMimeToExt[$mime]= $ext;
+ if ( !empty( $this->mMimeToExt[$mime] ) ) {
+ $this->mMimeToExt[$mime] .= ' ' . $ext;
+ } else {
+ $this->mMimeToExt[$mime] = $ext;
+ }
- $extensions= explode(' ',$ext);
+ $extensions = explode( ' ', $ext );
- foreach ($extensions as $e) {
- $e= trim($e);
- if (empty($e)) continue;
+ 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;
+ if ( !empty( $this->mExtToMime[$e] ) ) {
+ $this->mExtToMime[$e] .= ' ' . $mime;
+ } else {
+ $this->mExtToMime[$e] = $mime;
+ }
}
}
- /*
- * --- load mime.info ---
- */
+ /**
+ * --- 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("MimeMagic::MimeMagic: loading mime info from $wgMimeInfoFile\n");
+ $info = MM_WELL_KNOWN_MIME_INFO;
- $info.= "\n";
- $info.= file_get_contents($wgMimeInfoFile);
+ 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("MimeMagic::MimeMagic: can't load mime info from $wgMimeInfoFile\n");
+ } else {
+ wfDebug(__METHOD__.": no mime info file defined, using build-ins only.\n");
}
- else wfDebug("MimeMagic::MimeMagic: 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);
+ $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();
+ $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;
+ $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,' ');
+ $s = strtolower( $s );
+ $i = strpos( $s, ' ' );
- if ($i===false) continue;
+ 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]));
+ $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;
}
- else $mtype= MEDIATYPE_UNKNOWN;
- $m= explode(' ',$s);
+ $m = explode( ' ', $s );
- if (!isset($this->mMediaTypes[$mtype])) $this->mMediaTypes[$mtype]= array();
+ if ( !isset( $this->mMediaTypes[$mtype] ) ) {
+ $this->mMediaTypes[$mtype] = array();
+ }
- foreach ($m as $mime) {
- $mime= trim($mime);
- if (empty($mime)) continue;
+ foreach ( $m as $mime ) {
+ $mime = trim( $mime );
+ if ( empty( $mime ) ) {
+ continue;
+ }
- $this->mMediaTypes[$mtype][]= $mime;
+ $this->mMediaTypes[$mtype][] = $mime;
}
- if (sizeof($m)>1) {
- $main= $m[0];
- for ($i=1; $i<sizeof($m); $i+= 1) {
- $mime= $m[$i];
- $this->mMimeTypeAliases[$mime]= $main;
+ if ( sizeof( $m ) > 1 ) {
+ $main = $m[0];
+ for ( $i=1; $i<sizeof($m); $i += 1 ) {
+ $mime = $m[$i];
+ $this->mMimeTypeAliases[$mime] = $main;
}
}
}
/**
* Get an instance of this class
+ * @return MimeMagic
*/
- static function &singleton() {
+ public static function &singleton() {
if ( !isset( self::$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);
+ /**
+ * 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.
+ *
+ * @param $mime string
+ * @return string|null
+ */
+ public function getExtensionsForType( $mime ) {
+ $mime = strtolower( $mime );
- $r= @$this->mMimeToExt[$mime];
+ // Check the mime-to-ext map
+ if ( isset( $this->mMimeToExt[$mime] ) ) {
+ return $this->mMimeToExt[$mime];
+ }
- if (@!$r and isset($this->mMimeTypeAliases[$mime])) {
- $mime= $this->mMimeTypeAliases[$mime];
- $r= @$this->mMimeToExt[$mime];
+ // Resolve the mime type to the canonical type
+ if ( isset( $this->mMimeTypeAliases[$mime] ) ) {
+ $mime = $this->mMimeTypeAliases[$mime];
+ if ( isset( $this->mMimeToExt[$mime] ) ) {
+ return $this->mMimeToExt[$mime];
+ }
}
- return $r;
+ return null;
}
- /** returns a list of mime types for a given file extension
- * as a space separated string.
- */
- function getTypesForExtension($ext) {
- $ext= strtolower($ext);
+ /**
+ * Returns a list of mime types for a given file extension as a space
+ * separated string or null if the extension was unrecognized.
+ *
+ * @param $ext string
+ * @return string|null
+ */
+ public function getTypesForExtension( $ext ) {
+ $ext = strtolower( $ext );
- $r= @$this->mExtToMime[$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;
+ /**
+ * 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).
+ *
+ * @param $ext string
+ * @return string|null
+ */
+ public function guessTypesForExtension( $ext ) {
+ $m = $this->getTypesForExtension( $ext );
+ if ( is_null( $m ) ) {
+ return null;
+ }
- $m= trim( $m );
- $m= preg_replace('/\s.*$/','',$m);
+ // TODO: Check if this is needed; strtok( $m, ' ' ) should be sufficient
+ $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);
+ /**
+ * 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.
+ *
+ * @param $extension string
+ * @param $mime string
+ * @return bool|null
+ */
+ public function isMatchingExtension( $extension, $mime ) {
+ $ext = $this->getExtensionsForType( $mime );
- if (!$ext) {
- return NULL; //unknown
+ if ( !$ext ) {
+ return null; // Unknown mime type
}
- $ext= explode(' ',$ext);
-
- $extension= strtolower($extension);
- if (in_array($extension,$ext)) {
- return true;
- }
+ $ext = explode( ' ', $ext );
- return false;
+ $extension = strtolower( $extension );
+ return in_array( $extension, $ext );
}
- /** 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
+ /**
+ * Returns true if the mime type is known to represent an image format
+ * supported by the PHP GD library.
+ *
+ * @param $mime string
+ *
+ * @return bool
+ */
+ public 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',
*/
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', 'djvu'
+ 'xbm',
+
+ // Formats we recognize magic numbers for
+ 'djvu', 'ogx', 'ogg', 'ogv', 'oga', 'spx',
+ 'mid', 'pdf', 'wmf', 'xcf', 'webm', 'mkv', 'mka',
+ 'webp',
+
+ // XML formats we sure hope we recognize reliably
+ 'svg',
);
return in_array( strtolower( $extension ), $types );
}
+ /**
+ * 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().
+ *
+ * Currently, this method does the following:
+ *
+ * If $mime is "unknown/unknown" and isRecognizableExtension( $ext ) returns false,
+ * return the result of guessTypesForExtension($ext).
+ *
+ * If $mime is "application/x-opc+zip" and isMatchingExtension( $ext, $mime )
+ * gives true, return the result of guessTypesForExtension($ext).
+ *
+ * @param $mime String: the mime type, typically guessed from a file's content.
+ * @param $ext String: the file extension, as taken from the file name
+ *
+ * @return string the mime type
+ */
+ public function improveTypeFromExtension( $mime, $ext ) {
+ if ( $mime === 'unknown/unknown' ) {
+ if ( $this->isRecognizableExtension( $ext ) ) {
+ wfDebug( __METHOD__. ': refusing to guess mime type for .' .
+ "$ext file, we should have recognized it\n" );
+ } else {
+ // Not something we can detect, so simply
+ // trust the file extension
+ $mime = $this->guessTypesForExtension( $ext );
+ }
+ }
+ elseif ( $mime === 'application/x-opc+zip' ) {
+ if ( $this->isMatchingExtension( $ext, $mime ) ) {
+ // A known file extension for an OPC file,
+ // find the proper mime type for that file extension
+ $mime = $this->guessTypesForExtension( $ext );
+ } else {
+ wfDebug( __METHOD__. ": refusing to guess better type for $mime file, " .
+ ".$ext is not a known OPC extension.\n" );
+ $mime = 'application/zip';
+ }
+ }
- /** mime type detection. This uses detectMimeType to detect the mim 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 bool $useExt switch for allowing to use the file extension to guess the mime type. true by default.
- *
- * @return string the mime type of $file
- */
- function guessMimeType( $file, $useExt=true ) {
- $fname = 'MimeMagic::guessMimeType';
- $mime= $this->detectMimeType($file,$useExt);
+ if ( isset( $this->mMimeTypeAliases[$mime] ) ) {
+ $mime = $this->mMimeTypeAliases[$mime];
+ }
- // Read a chunk of the file
- $f = fopen( $file, "rt" );
- if( !$f ) return "unknown/unknown";
- $head = fread( $f, 1024 );
- fclose( $f );
+ wfDebug(__METHOD__.": improved mime type for .$ext: $mime\n");
+ return $mime;
+ }
- $sub4 = substr( $head, 0, 4 );
- if ( $sub4 == "\x01\x00\x09\x00" || $sub4 == "\xd7\xcd\xc6\x9a" ) {
- // WMF kill kill kill
- // Note that WMF may have a bare header, no magic number.
- // The former of the above two checks is theoretically prone to false positives
- $mime = "application/x-msmetafile";
+ /**
+ * 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, as well as ZIP
+ * based formats like OPC/ODF files).
+ *
+ * @param $file String: the file to check
+ * @param $ext Mixed: the file extension, or true (default) to extract it from the filename.
+ * Set it to false to ignore the extension. DEPRECATED! Set to false, use
+ * improveTypeFromExtension($mime, $ext) later to improve mime type.
+ *
+ * @return string the mime type of $file
+ */
+ public function guessMimeType( $file, $ext = true ) {
+ if ( $ext ) { // TODO: make $ext default to false. Or better, remove it.
+ wfDebug( __METHOD__.": WARNING: use of the \$ext parameter is deprecated. " .
+ "Use improveTypeFromExtension(\$mime, \$ext) instead.\n" );
}
- if (strpos($mime,"text/")===0 || $mime==="application/xml") {
+ $mime = $this->doGuessMimeType( $file, $ext );
- $xml_type= NULL;
- $script_type= NULL;
+ if( !$mime ) {
+ wfDebug( __METHOD__.": internal type detection failed for $file (.$ext)...\n" );
+ $mime = $this->detectMimeType( $file, $ext );
+ }
- /*
- * look for XML formats (XHTML and SVG)
- */
- if ($mime==="text/sgml" ||
- $mime==="text/plain" ||
- $mime==="text/html" ||
- $mime==="text/xml" ||
- $mime==="application/xml") {
+ if ( isset( $this->mMimeTypeAliases[$mime] ) ) {
+ $mime = $this->mMimeTypeAliases[$mime];
+ }
- if (substr($head,0,5)=="<?xml") $xml_type= "ASCII";
- elseif (substr($head,0,8)=="\xef\xbb\xbf<?xml") $xml_type= "UTF-8";
- elseif (substr($head,0,10)=="\xfe\xff\x00<\x00?\x00x\x00m\x00l") $xml_type= "UTF-16BE";
- elseif (substr($head,0,10)=="\xff\xfe<\x00?\x00x\x00m\x00l\x00") $xml_type= "UTF-16LE";
+ wfDebug(__METHOD__.": guessed mime type of $file: $mime\n");
+ return $mime;
+ }
- if ($xml_type) {
- if ($xml_type!=="UTF-8" && $xml_type!=="ASCII") $head= iconv($xml_type,"ASCII//IGNORE",$head);
+ /**
+ * Guess the mime type from the file contents.
+ *
+ * @param string $file
+ * @param mixed $ext
+ * @return bool|string
+ */
+ private function doGuessMimeType( $file, $ext ) { // TODO: remove $ext param
+ // Read a chunk of the file
+ wfSuppressWarnings();
+ // @todo FIXME: Shouldn't this be rb?
+ $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 );
- $match= array();
- $doctype= "";
- $tag= "";
+ wfDebug( __METHOD__ . ": analyzing head and tail of $file for magic numbers.\n" );
- if (preg_match('%<!DOCTYPE\s+[\w-]+\s+PUBLIC\s+["'."'".'"](.*?)["'."'".'"].*>%sim',$head,$match)) $doctype= $match[1];
- if (preg_match('%<(\w+).*>%sim',$head,$match)) $tag= $match[1];
+ // Hardcode a few magic number checks...
+ $headers = array(
+ // Multimedia...
+ 'MThd' => 'audio/midi',
+ 'OggS' => 'application/ogg',
- #print "<br>ANALYSING $file ($mime): doctype= $doctype; tag= $tag<br>";
+ // Image formats...
+ // Note that WMF may have a bare header, no magic number.
+ "\x01\x00\x09\x00" => 'application/x-msmetafile', // Possibly prone to false positives?
+ "\xd7\xcd\xc6\x9a" => 'application/x-msmetafile',
+ '%PDF' => 'application/pdf',
+ 'gimp xcf' => 'image/x-xcf',
+
+ // Some forbidden fruit...
+ 'MZ' => 'application/octet-stream', // DOS/Windows executable
+ "\xca\xfe\xba\xbe" => 'application/octet-stream', // Mach-O binary
+ "\x7fELF" => 'application/octet-stream', // ELF binary
+ );
- if (strpos($doctype,"-//W3C//DTD SVG")===0) $mime= "image/svg";
- elseif ($tag==="svg") $mime= "image/svg";
- elseif (strpos($doctype,"-//W3C//DTD XHTML")===0) $mime= "text/html";
- elseif ($tag==="html") $mime= "text/html";
+ 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 WebM and Matroska files */
+ if ( strncmp( $head, pack( "C4", 0x1a, 0x45, 0xdf, 0xa3 ), 4 ) == 0 ) {
+ $doctype = strpos( $head, "\x42\x82" );
+ if ( $doctype ) {
+ // Next byte is datasize, then data (sizes larger than 1 byte are very stupid muxers)
+ $data = substr($head, $doctype+3, 8);
+ if ( strncmp( $data, "matroska", 8 ) == 0 ) {
+ wfDebug( __METHOD__ . ": recognized file as video/x-matroska\n" );
+ return "video/x-matroska";
+ } elseif ( strncmp( $data, "webm", 4 ) == 0 ) {
+ wfDebug( __METHOD__ . ": recognized file as video/webm\n" );
+ return "video/webm";
}
}
+ wfDebug( __METHOD__ . ": unknown EBML file\n" );
+ return "unknown/unknown";
+ }
- /*
- * look for shell scripts
- */
- if (!$xml_type) {
- $script_type= NULL;
+ /* Look for WebP */
+ if ( strncmp( $head, "RIFF", 4 ) == 0 && strncmp( substr( $head, 8, 8), "WEBPVP8 ", 8 ) == 0 ) {
+ wfDebug( __METHOD__ . ": recognized file as image/webp\n" );
+ return "image/webp";
+ }
- #detect by shebang
- if (substr($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";
+ /**
+ * 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. :)
+ *
+ * @todo FIXME: For this reason, the check is probably useless -- an attacker
+ * could almost certainly just pad the file with a lot of nonsense to
+ * circumvent the check in any case where it would be a security
+ * problem. On the other hand, it causes harmful false positives (bug
+ * 16583). The heuristic has been cut down to exclude three-character
+ * strings like "<? ", but should it be axed completely?
+ */
+ if ( ( strpos( $head, '<?php' ) !== 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 $file as application/x-php\n" );
+ return 'application/x-php';
+ }
- if ($script_type) {
- if ($script_type!=="UTF-8" && $script_type!=="ASCII") $head= iconv($script_type,"ASCII//IGNORE",$head);
+ /**
+ * 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';
+ }
+ }
- $match= array();
- $prog= "";
+ /**
+ * 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!" ) {
+ $script_type= "UTF-16LE";
+ }
- if (preg_match('%/?([^\s]+/)(w+)%sim',$head,$match)) {
- $script= $match[2]; // FIXME: $script variable not used; should this be "$prog = $match[2];" instead?
+ 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 .= '?';
}
-
- $mime= "application/x-$prog";
}
}
- /*
- * look for PHP
- */
- if( !$xml_type && !$script_type ) {
+ $match = array();
- if( ( strpos( $head, '<?php' ) !== false ) ||
- ( strpos( $head, '<? ' ) !== false ) ||
- ( strpos( $head, "<?\n" ) !== false ) ||
- ( strpos( $head, "<?\t" ) !== false ) ||
- ( strpos( $head, "<?=" ) !== false ) ||
+ if ( preg_match( '%/?([^\s]+/)(\w+)%', $head, $match ) ) {
+ $mime = "application/x-{$match[2]}";
+ wfDebug( __METHOD__.": shell script recognized as $mime\n" );
+ return $mime;
+ }
+ }
- ( 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 ) ) {
+ // Check for ZIP variants (before getimagesize)
+ if ( strpos( $tail, "PK\x05\x06" ) !== false ) {
+ wfDebug( __METHOD__.": ZIP header present in $file\n" );
+ return $this->detectZipType( $head, $tail, $ext );
+ }
- $mime= "application/x-php";
- }
- }
+ wfSuppressWarnings();
+ $gis = getimagesize( $file );
+ wfRestoreWarnings();
+ if( $gis && isset( $gis['mime'] ) ) {
+ $mime = $gis['mime'];
+ wfDebug( __METHOD__.": getimagesize detected $file as $mime\n" );
+ return $mime;
}
- if (isset($this->mMimeTypeAliases[$mime])) $mime= $this->mMimeTypeAliases[$mime];
+ // Also test DjVu
+ $deja = new DjVuImage( $file );
+ if( $deja->isValid() ) {
+ wfDebug( __METHOD__.": detected $file as image/vnd.djvu\n" );
+ return 'image/vnd.djvu';
+ }
- wfDebug("$fname: final mime type of $file: $mime\n");
- return $mime;
+ return 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'.
+ *
+ * @param $header String: some reasonably-sized chunk of file header
+ * @param $tail String: the tail of the file
+ * @param $ext Mixed: the file extension, or true to extract it from the filename.
+ * Set it to false (default) to ignore the extension. DEPRECATED! Set to false,
+ * use improveTypeFromExtension($mime, $ext) later to improve mime type.
+ *
+ * @return string
+ */
+ function detectZipType( $header, $tail = null, $ext = false ) {
+ if( $ext ) { # TODO: remove $ext param
+ wfDebug( __METHOD__.": WARNING: use of the \$ext parameter is deprecated. " .
+ "Use improveTypeFromExtension(\$mime, \$ext) instead.\n" );
+ }
- /** 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 $useExt is true, 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 bool $useExt switch for allowing to use the file extension to guess the mime type. true by default.
- *
- * @return string the mime type of $file
- * @access private
- */
- function detectMimeType( $file, $useExt=true ) {
- $fname = 'MimeMagic::detectMimeType';
+ $mime = 'application/zip';
+ $opendocTypes = array(
+ 'chart-template',
+ 'chart',
+ 'formula-template',
+ 'formula',
+ 'graphics-template',
+ 'graphics',
+ 'image-template',
+ 'image',
+ 'presentation-template',
+ 'presentation',
+ 'spreadsheet-template',
+ 'spreadsheet',
+ 'text-template',
+ 'text-master',
+ 'text-web',
+ 'text' );
+
+ // http://lists.oasis-open.org/archives/office/200505/msg00006.html
+ $types = '(?:' . implode( '|', $opendocTypes ) . ')';
+ $opendocRegex = "/^mimetype(application\/vnd\.oasis\.opendocument\.$types)/";
+
+ $openxmlRegex = "/^\[Content_Types\].xml/";
+
+ if ( preg_match( $opendocRegex, substr( $header, 30 ), $matches ) ) {
+ $mime = $matches[1];
+ wfDebug( __METHOD__.": detected $mime from ZIP archive\n" );
+ } elseif ( preg_match( $openxmlRegex, substr( $header, 30 ) ) ) {
+ $mime = "application/x-opc+zip";
+ # TODO: remove the block below, as soon as improveTypeFromExtension is used everywhere
+ if ( $ext !== true && $ext !== false ) {
+ /** This is the mode used by getPropsFromPath
+ * These mime's are stored in the database, where we don't really want
+ * x-opc+zip, because we use it only for internal purposes
+ */
+ if ( $this->isMatchingExtension( $ext, $mime) ) {
+ /* A known file extension for an OPC file,
+ * find the proper mime type for that file extension */
+ $mime = $this->guessTypesForExtension( $ext );
+ } else {
+ $mime = "application/zip";
+ }
+ }
+ wfDebug( __METHOD__.": detected an Open Packaging Conventions archive: $mime\n" );
+ } elseif ( substr( $header, 0, 8 ) == "\xd0\xcf\x11\xe0\xa1\xb1\x1a\xe1" &&
+ ($headerpos = strpos( $tail, "PK\x03\x04" ) ) !== false &&
+ preg_match( $openxmlRegex, substr( $tail, $headerpos + 30 ) ) ) {
+ if ( substr( $header, 512, 4) == "\xEC\xA5\xC1\x00" ) {
+ $mime = "application/msword";
+ }
+ switch( substr( $header, 512, 6) ) {
+ case "\xEC\xA5\xC1\x00\x0E\x00":
+ case "\xEC\xA5\xC1\x00\x1C\x00":
+ case "\xEC\xA5\xC1\x00\x43\x00":
+ $mime = "application/vnd.ms-powerpoint";
+ break;
+ case "\xFD\xFF\xFF\xFF\x10\x00":
+ case "\xFD\xFF\xFF\xFF\x1F\x00":
+ case "\xFD\xFF\xFF\xFF\x22\x00":
+ case "\xFD\xFF\xFF\xFF\x23\x00":
+ case "\xFD\xFF\xFF\xFF\x28\x00":
+ case "\xFD\xFF\xFF\xFF\x29\x00":
+ case "\xFD\xFF\xFF\xFF\x10\x02":
+ case "\xFD\xFF\xFF\xFF\x1F\x02":
+ case "\xFD\xFF\xFF\xFF\x22\x02":
+ case "\xFD\xFF\xFF\xFF\x23\x02":
+ case "\xFD\xFF\xFF\xFF\x28\x02":
+ case "\xFD\xFF\xFF\xFF\x29\x02":
+ $mime = "application/vnd.msexcel";
+ break;
+ }
+
+ wfDebug( __METHOD__.": detected a MS Office document with OPC trailer\n");
+ } else {
+ wfDebug( __METHOD__.": unable to identify type of ZIP archive\n" );
+ }
+ return $mime;
+ }
+ /**
+ * Internal mime type detection. 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 $file String: the file to check
+ * @param $ext Mixed: the file extension, or true (default) to extract it from the filename.
+ * Set it to false to ignore the extension. DEPRECATED! Set to false, use
+ * improveTypeFromExtension($mime, $ext) later to improve mime type.
+ *
+ * @return string the mime type of $file
+ */
+ private function detectMimeType( $file, $ext = true ) {
global $wgMimeDetectorCommand;
- $m= NULL;
- if ($wgMimeDetectorCommand) {
- $fn= wfEscapeShellArg($file);
- $m= `$wgMimeDetectorCommand $fn`;
+ if ( $ext ) { # TODO: make $ext default to false. Or better, remove it.
+ wfDebug( __METHOD__.": WARNING: use of the \$ext parameter is deprecated. Use improveTypeFromExtension(\$mime, \$ext) instead.\n" );
}
- else if (function_exists("finfo_open") && function_exists("finfo_file")) {
+
+ $m = null;
+ if ( $wgMimeDetectorCommand ) {
+ // @todo FIXME: Use wfShellExec
+ $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
# 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);
+ $mime_magic_resource = finfo_open( FILEINFO_MIME ); /* return mime type ala mimetype extension */
- finfo_close($mime_magic_resource);
+ if ( $mime_magic_resource ) {
+ $m = finfo_file( $mime_magic_resource, $file );
+ finfo_close( $mime_magic_resource );
+ } else {
+ wfDebug( __METHOD__.": finfo_open failed on ".FILEINFO_MIME."!\n" );
}
- else wfDebug("$fname: finfo_open failed on ".FILEINFO_MIME."!\n");
- }
- else if (function_exists("mime_content_type")) {
+ } 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.
# 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);
-
- if ( $m == 'text/plain' ) {
- // mime_content_type sometimes considers DJVU files to be text/plain.
- $deja = new DjVuImage( $file );
- if( $deja->isValid() ) {
- wfDebug("$fname: (re)detected $file as image/vnd.djvu\n");
- $m = 'image/vnd.djvu';
- }
- }
- }
- else wfDebug("$fname: 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) $m= NULL;
- else {
- wfDebug("$fname: magic mime type of $file: $m\n");
- return $m;
- }
+ $m = mime_content_type($file);
+ } else {
+ wfDebug( __METHOD__.": no magic mime detector found!\n" );
}
- #if still not known, use getimagesize to find out the type of image
- #TODO: skip things that do not have a well-known image extension? Would that be safe?
- wfSuppressWarnings();
- $gis = getimagesize( $file );
- wfRestoreWarnings();
+ if ( $m ) {
+ # normalize
+ $m = preg_replace( '![;, ].*$!', '', $m ); #strip charset, etc
+ $m = trim( $m );
+ $m = strtolower( $m );
- $notAnImage= false;
-
- if ($gis && is_array($gis) && $gis[2]) {
- switch ($gis[2]) {
- case IMAGETYPE_GIF: $m= "image/gif"; break;
- case IMAGETYPE_JPEG: $m= "image/jpeg"; break;
- case IMAGETYPE_PNG: $m= "image/png"; break;
- case IMAGETYPE_SWF: $m= "application/x-shockwave-flash"; break;
- case IMAGETYPE_PSD: $m= "application/photoshop"; break;
- case IMAGETYPE_BMP: $m= "image/bmp"; break;
- case IMAGETYPE_TIFF_II: $m= "image/tiff"; break;
- case IMAGETYPE_TIFF_MM: $m= "image/tiff"; break;
- case IMAGETYPE_JPC: $m= "image"; break;
- case IMAGETYPE_JP2: $m= "image/jpeg2000"; break;
- case IMAGETYPE_JPX: $m= "image/jpeg2000"; break;
- case IMAGETYPE_JB2: $m= "image"; break;
- case IMAGETYPE_SWC: $m= "application/x-shockwave-flash"; break;
- case IMAGETYPE_IFF: $m= "image/vnd.xiff"; break;
- case IMAGETYPE_WBMP: $m= "image/vnd.wap.wbmp"; break;
- case IMAGETYPE_XBM: $m= "image/x-xbitmap"; break;
- }
-
- if ($m) {
- wfDebug("$fname: image mime type of $file: $m\n");
+ if ( strpos( $m, 'unknown' ) !== false ) {
+ $m = null;
+ } else {
+ wfDebug( __METHOD__.": magic mime type of $file: $m\n" );
return $m;
}
- else $notAnImage= true;
- } else {
- // Also test DjVu
- $deja = new DjVuImage( $file );
- if( $deja->isValid() ) {
- wfDebug("$fname: detected $file as image/vnd.djvu\n");
- return 'image/vnd.djvu';
- }
}
- #if desired, look at extension as a fallback.
- if ($useExt) {
+ // If desired, look at extension as a fallback.
+ if ( $ext === true ) {
$i = strrpos( $file, '.' );
- $e= strtolower( $i ? substr( $file, $i + 1 ) : '' );
-
- $m= $this->guessTypesForExtension($e);
-
- #TODO: if $notAnImage is set, do not trust the file extension if
- # the results is one of the image types that should have been recognized
- # by getimagesize
-
- if ($m) {
- wfDebug("$fname: extension mime type of $file: $m\n");
- return $m;
+ $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 $m;
+ }
}
}
- #unknown type
- wfDebug("$fname: failed to guess mime type for $file!\n");
- return "unknown/unknown";
+ // 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;
+ * 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 $path String: 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 $mime String: 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);
+ // 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) ) {
+ // 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;
+ if ( !$f ) return MEDIATYPE_UNKNOWN;
$head = fread( $f, 256 );
fclose( $f );
- $head= strtolower( $head );
+ $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;
+ // 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
+ // Check for entry for full mime type
if( $mime ) {
- $type= $this->findMediaType($mime);
- if( $type!==MEDIATYPE_UNKNOWN ) return $type;
+ $type = $this->findMediaType( $mime );
+ if ( $type !== MEDIATYPE_UNKNOWN ) {
+ return $type;
+ }
}
- #check for entry for file extension
- $e= NULL;
- if( $path ) {
+ // Check for entry for file extension
+ if ( $path ) {
$i = strrpos( $path, '.' );
- $e= strtolower( $i ? substr( $path, $i + 1 ) : '' );
+ $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;
+ // 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;
+ // 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 ) $type= MEDIATYPE_UNKNOWN;
+ if( !$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;
+ /**
+ * 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
+ * @return int|string
+ */
+ 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 = explode( ' ', $m );
+ } else {
+ // Normalize mime type
+ if ( isset( $this->mMimeTypeAliases[$extMime] ) ) {
+ $extMime = $this->mMimeTypeAliases[$extMime];
}
- $m= array($extMime);
+ $m = array( $extMime );
}
- foreach ($m as $mime) {
- foreach ($this->mMediaTypes as $type => $codes) {
- if (in_array($mime,$codes,true)) return $type;
+ 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 $fileName String: the file name (unused at present)
+ * @param $chunk String: the first 256 bytes of the file
+ * @param $proposed String: the MIME type proposed by the server
+ * @return Array
+ */
+ public function getIEMimeTypes( $fileName, $chunk, $proposed ) {
+ $ca = $this->getIEContentAnalyzer();
+ return $ca->getRealMimesFromData( $fileName, $chunk, $proposed );
+ }
+
+ /**
+ * Get a cached instance of IEContentAnalyzer
+ *
+ * @return IEContentAnalyzer
+ */
+ protected function getIEContentAnalyzer() {
+ if ( is_null( $this->mIEAnalyzer ) ) {
+ $this->mIEAnalyzer = new IEContentAnalyzer;
+ }
+ return $this->mIEAnalyzer;
+ }
+}