Update fFile.php

Additional detection for unusual (but likely valid) JPEG header formats. flourishlib#198 (comment)
BrendonKoz · Jan 10, 2018 · 5dded7a · 5dded7a
1 parent 5540295
commit 5dded7a
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/fFile.php b/fFile.php
@@ -182,7 +182,8 @@ static private function determineMimeTypeByContents($content, $extension)
 
 		$normal_jpeg    = $length > 10 && in_array(substr($content, 6, 4), array('JFIF', 'Exif'));
 		$photoshop_jpeg = $length > 24 && $_0_4 == "\xFF\xD8\xFF\xED" && substr($content, 20, 4) == '8BIM';
-		if ($normal_jpeg || $photoshop_jpeg) {
+		$jpeg_prefix = $_0_3 == "\xFF\xD8\xFF";
+		if ($normal_jpeg || $photoshop_jpeg || $jpeg_prefix) {
 			return 'image/jpeg';
 		}