Gateway responds with two JSONs in case of error

[roman-khimov]

Current Behavior

Object put reply:

{"code":2048,"message":"writer close: status: code = 2048 message = access to object operation denied","type":"API"}
{"container_id":"754iyTDY8xUtZJZfheSYLUn7jvCkxr79RcbjMt81QykC","object_id":"11111111111111111111111111111111"}

Expected Behavior

A single JSON struct with error (it fails at the NeoFS level), second JSON is misleading and can make applications think the operation is successful where it's not.

Possible Solution

Drop the second output line.

Steps to Reproduce

Upload to a container without appropriate rights via REST.

Context

Affects send.fs.neo.org.

Regression

Unknown, maybe.

Your Environment

• Version of the product used: 0.11.1
• Server setup and configuration files used: testnet
• Operating System and version (uname -a): Debian stable