InternalError on HEAD with a multipart-manifest=get&format=raw query param

[ASHWIN A NAIR]

vagrant@vagrant:~/swift$ curl --location --head 'http://saio:8090/v1/AUTH_test/testheadpart/test.mp4?multipart-manifest=get&format=raw'
HTTP/1.1 500 Internal Error
Content-Type: text/plain
Content-Length: 17
X-Trans-Id: tx42940ff6186342ca9da6d-0064c84e91
X-Openstack-Request-Id: tx42940ff6186342ca9da6d-0064c84e91
Date: Tue, 01 Aug 2023 00:15:13 GMT

Related Swift logs from my dev vsaio environment:

vagrant proxy-server:

Error: An error occurred: #012Traceback (most recent call last):#012 File "/vagrant/swift/swift/common/middleware/catch_errors.py",
line 75, in handle_request#012 resp = self._app_call(env)#012 File "/vagrant/swift/swift/common/wsgi.py",
line 1116, in _app_call#012 resp = reiterate(resp)#012 File "/vagrant/swift/swift/common/utils/__init__.py",
line 3589, in reiterate#012 chunk = next(iterator)#012 File "/vagrant/swift/swift/common/middleware/proxy_logging.py",
line 439, in iter_response#012 for chunk in iterator:#012 File "/vagrant/swift/swift/common/middleware/catch_errors.py",

line 45, in enforce_byte_count#012 raise

BadResponseLength(#012swift.common.middleware.catch_errors.BadResponseLength: Too many bytes; truncating after 0 bytes with at least 2 surplus bytes remaining (txn: tx42940ff6186342ca9da6d-0064c84e91) (client_ip: 192.168.8.80)

[clayg (clay-gerrard)]

source of bug is here: https://github.com/NVIDIA/swift/blob/master/swift/common/middleware/slo.py#L945

original HEAD request for manifest returns no body, parse error makes up data and then tries to return it (which byteenforcer blows up; because HEAD resp shouldn't have body)

N.B. ideally clients might expect HEAD resp to have same headers as GET requests - but that may not be trivial for HEAD w/ ?format=raw unless we refetch