X-Git-Url: https://git.heureux-cyclage.org/?p=lhc%2Fweb%2Fwiklou.git;a=blobdiff_plain;f=includes%2Flibs%2Fmime%2FMimeAnalyzer.php;h=0083e4b32a7ce6fc688ec1167d5858ce5cde4ec8;hp=c361fdfa0d8d123be9e80706b4d0d8e5f7de4438;hb=f7e1770fb832aa77bf4e16ce8cc815f2b24dd10d;hpb=55faf05e1118edf1073aa5cbddd7401ea244a1d2

diff --git a/includes/libs/mime/MimeAnalyzer.php b/includes/libs/mime/MimeAnalyzer.php
index c361fdfa0d..0083e4b32a 100644
--- a/includes/libs/mime/MimeAnalyzer.php
+++ b/includes/libs/mime/MimeAnalyzer.php
@@ -533,6 +533,9 @@ EOT;
 
 			// XML formats we sure hope we recognize reliably
 			'svg',
+
+			// 3D formats
+			'stl',
 		];
 		return in_array( strtolower( $extension ), $types );
 	}
@@ -804,6 +807,23 @@ EOT;
 			return $this->detectZipType( $head, $tail, $ext );
 		}
 
+		// Check for STL (3D) files
+		// @see https://en.wikipedia.org/wiki/STL_(file_format)
+		if ( $fsize >= 15 &&
+			stripos( $head, 'SOLID ' ) === 0 &&
+			preg_match( '/\RENDSOLID .*$/i', $tail ) ) {
+			// ASCII STL file
+			return 'application/sla';
+		} elseif ( $fsize > 84 ) {
+			// binary STL file
+			$triangles = substr( $head, 80, 4 );
+			$triangles = unpack( 'V', $triangles );
+			$triangles = reset( $triangles );
+			if ( $triangles !== false && $fsize === 84 + ( $triangles * 50 ) ) {
+				return 'application/sla';
+			}
+		}
+
 		MediaWiki\suppressWarnings();
 		$gis = getimagesize( $file );
 		MediaWiki\restoreWarnings();