Issue with public ECR since 0.2.21

[gdlx]

Since upgrading to 0.2.21+, I get the following error when trying to get some tags from a public ECR repo:

from oras.client import OrasClient
client = OrasClient('public.ecr.aws')
client.get_tags('/aws-controllers-k8s/acm-chart')

Your Authorization Token is invalid.
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "[...]/.venv/lib/python3.12/site-packages/oras/decorator.py", line 36, in __call__
    return self.func(cls, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "[...]/.venv/lib/python3.12/site-packages/oras/provider.py", line 356, in get_tags
    self._do_paginated_request(tags_url, callable=extract_tags)
  File "[...]/.venv/lib/python3.12/site-packages/oras/provider.py", line 382, in _do_paginated_request
    self._check_200_response(response)
  File "[...]/.venv/lib/python3.12/site-packages/oras/provider.py", line 651, in _check_200_response
    raise ValueError(f"Issue with {response.request.url}: {response.reason}")
ValueError: Issue with https://public.ecr.aws/v2/aws-controllers-k8s/acm-chart/tags/list: Bad Request

When downgrading to 0.2.2:

from oras.client import OrasClient
client = OrasClient('public.ecr.aws')
client.get_tags('/aws-controllers-k8s/acm-chart')

['0.0.13', '0.0.19', '0.0.20', 'v0.0.6', '0.0.4', '0.0.5', '0.0.11', '0.0.7', 'v0.0.4', '0.0.17', '0.0.16', 'v0.0.3', '0.0.6', 'v0.0.5', 'v0.0.1', '0.0.10', 'v0.0.2', '0.0.2', '0.0.8', '0.0.18', '0.0.3', '0.0.1', '0.0.15', '0.0.12', '0.0.9', '0.0.14']

I think it's caused by 81c4b04.

Using the debugger, I've seen the sent authorization header has the value Bearer None, which isn't accepted by ECR.

With 0.2.2, no authorization header is sent, which is what's expected for an anonymous request.

[tarilabs]

Hi, am I correct to assume there is no entry in ~/.docker/config.json for public.ecr.aws on the environment where this is found?

[gdlx]

There is not and there is no reason to get authenticated on this public repo.

cat ~/.docker/config.json
{
        "auths": {},
        "currentContext": "buildx"
}

[tarilabs]

thanks, this way I have more element to ensure proper reproduction