From f3e00133a06ba808ef2f99c46c401381905e72f5 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Mon, 4 Jul 2016 13:45:10 +0100
Subject: [PATCH] dropbox: Don't retry 461 errors - fixes #551

461 errors from dropbox indicate some sort of copyright violation.
---
 dropbox/dropbox.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dropbox/dropbox.go b/dropbox/dropbox.go
index 5fb323e98..76ae9239b 100644
--- a/dropbox/dropbox.go
+++ b/dropbox/dropbox.go
@@ -710,6 +710,13 @@ func (o *Object) Storable() bool {
 // Open an object for read
 func (o *Object) Open() (in io.ReadCloser, err error) {
 	in, _, err = o.fs.db.Download(o.remotePath(), "", 0)
+	if dropboxErr, ok := err.(*dropbox.Error); ok {
+		// Dropbox return 461 for copyright violation so don't
+		// attempt to retry this error
+		if dropboxErr.StatusCode == 461 {
+			return nil, fs.NoRetryError(err)
+		}
+	}
 	return
 }