Return a 404 when the directory does not exist

router/router_server_files.go

@@ -78,6 +78,13 @@ func getServerListDirectory(c *gin.Context) {
 
 	stats, err := s.Filesystem.ListDirectory(d)
 	if err != nil {
+		if err.Error() == "readdirent: not a directory" {
+			c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
+				"error": "The requested directory does not exist.",
+			})
+			return
+		}
+
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}