From: cao.leilc <cao.leilc@inspur.com>
Date: Fri, 2 Apr 2021 03:55:54 +0000 (+0800)
Subject: rgw : add check empty for sync url
X-Git-Tag: v16.2.6~105^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F42653%2Fhead;p=ceph.git

rgw : add check empty for sync url

Fixes: https://tracker.ceph.com/issues/50103
Signed-off-by: caolei <halei15848934852@163.com>
(cherry picked from commit 3a4e0b79310b21eeee37043d5419887bb41c0cf6)
---

diff --git a/src/rgw/rgw_rest_client.cc b/src/rgw/rgw_rest_client.cc
index dc78e418bcc1..30680101559a 100644
--- a/src/rgw/rgw_rest_client.cc
+++ b/src/rgw/rgw_rest_client.cc
@@ -713,7 +713,7 @@ int RGWRESTStreamRWRequest::do_send_prepare(const DoutPrefixProvider *dpp, RGWAc
                                          bufferlist *send_data)
 {
   string new_url = url;
-  if (new_url[new_url.size() - 1] != '/')
+  if (!new_url.empty() && new_url.back() != '/')
     new_url.append("/");
   
   RGWEnv new_env;