rgw: fix double slash (//) killing the gateway

When a bucket is inialized as a static website, a curl request on the bucket with double slash kills the gateway.
The problem is on the URL handling of the subdirectory, which tries to remove the last slash of any URL, so when only / is given as a sub-directory, this results to an empty string.

Fixes: https://tracker.ceph.com/issues/41225
Signed-off-by: Theofilos Mouratidis <t.mour@cern.ch>
(cherry picked from commit 626330c504b1af8393986bd0553786c3031422cd)

diff --git a/src/rgw/rgw_rest_s3.cc b/src/rgw/rgw_rest_s3.cc
index 34012e99152f8ec8796439e66b3030d685498f3f..a4cb2669c894050fecf33b4f31c876dfa0cdaf9c 100644 (file)
--- a/src/rgw/rgw_rest_s3.cc
+++ b/src/rgw/rgw_rest_s3.cc
@@ -4097,7 +4097,7 @@ bool RGWHandler_REST_S3Website::web_dir() const {
 
   if (subdir_name.empty()) {
     return false;
-  } else if (subdir_name.back() == '/') {
+  } else if (subdir_name.back() == '/' && subdir_name.size() > 1) {
     subdir_name.pop_back();
   }