- }
- }
-
- $match = [];
-
- 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 variants (before getimagesize)
- if ( strpos( $tail, "PK\x05\x06" ) !== false ) {
- wfDebug( __METHOD__ . ": ZIP header present in $file\n" );
- return $this->detectZipType( $head, $tail, $ext );
- }
-
- MediaWiki\suppressWarnings();
- $gis = getimagesize( $file );
- MediaWiki\restoreWarnings();
-
- 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';
- }
-
- # Media handling extensions can guess the MIME by content
- # It's intentionally here so that if core is wrong about a type (false positive),
- # people will hopefully nag and submit patches :)
- $mime = false;
- # Some strings by reference for performance - assuming well-behaved hooks
- Hooks::run(
- 'MimeMagicGuessFromContent',
- [ $this, &$head, &$tail, $file, &$mime ]
- );
-
- return $mime;
- }
-
- /**
- * 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 string $header Some reasonably-sized chunk of file header
- * @param string|null $tail The tail of the file
- * @param 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.
- *
- * @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" );
- }
-
- $mime = 'application/zip';
- $opendocTypes = [
- '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 is tried if it is available. 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'.
- *
- * @param string $file The file to check
- * @param 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.
- *
- * @return string The MIME type of $file
- */
- private function detectMimeType( $file, $ext = true ) {
- /** @todo Make $ext default to false. Or better, remove it. */
- if ( $ext ) {
- wfDebug( __METHOD__ . ": WARNING: use of the \$ext parameter is deprecated. "
- . "Use improveTypeFromExtension(\$mime, \$ext) instead.\n" );
- }
-
- $mimeDetectorCommand = $this->mConfig->get( 'MimeDetectorCommand' );
- $m = null;
- if ( $mimeDetectorCommand ) {
- $args = wfEscapeShellArg( $file );
- $m = wfShellExec( "$mimeDetectorCommand $args" );
- } elseif ( function_exists( "finfo_open" ) && function_exists( "finfo_file" ) ) {
- $mime_magic_resource = finfo_open( FILEINFO_MIME );
-
- 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( __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 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 = str_replace( 'ffmpeg2theora', '', 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
- 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;
- }
- }
- }