Make sure to check the mimetype on the path if a secure one could not be detemined though the content

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Author: juliusknorr

apps/workflowengine/lib/Check/FileMimeType.php

@@ -93,6 +93,18 @@ protected function cacheAndReturnMimeType(string $storageId, ?string $path, stri
 		return $mimeType;
 	}
 
+	/**
+	 * Make sure that even though the content based check returns an application/octet-stream can still be checked based on mimetypemappings of their extension
+	 * @param string $operator
+	 * @param string $value
+	 * @return bool
+	 */
+	public function executeCheck($operator, $value) {
+		$actualValue = $this->getActualValue();
+		return $this->executeStringCheck($operator, $value, $actualValue) ||
+			($actualValue === 'application/octet-stream' && $this->executeStringCheck($operator, $value, $this->mimeTypeDetector->detectPath($this->path)));
+	}
+
 	/**
 	 * @return string
 	 */