From b835330714afcef2ec08662ffd2fd1043b62984f Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Thu, 7 Apr 2016 14:32:01 +0100
Subject: [PATCH] Use "application/octet-stream" if mime.TypeByExtension
 returns invalid type

Fixes #424
---
 fs/operations.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/operations.go b/fs/operations.go
index 43a65a077..f320047e8 100644
--- a/fs/operations.go
+++ b/fs/operations.go
@@ -166,7 +166,7 @@ func Equal(src, dst Object) bool {
 // MimeType returns a guess at the mime type from the extension
 func MimeType(o Object) string {
 	mimeType := mime.TypeByExtension(path.Ext(o.Remote()))
-	if mimeType == "" {
+	if !strings.ContainsRune(mimeType, '/') {
 		mimeType = "application/octet-stream"
 	}
 	return mimeType