Docs request: how to use `Client._http`

[jamesbraza]

Is your feature request related to a problem? Please describe.

I am trying to figure out how to use httpx==0.27.0 with google.cloud.storage.Client (google-cloud-storage==2.16.0). I think I need to use Client._http:

import google.auth
import httpx
from google.cloud.storage import Client

http = httpx.Client(
    transport=httpx.HTTPTransport(
        limits=httpx.Limits(
            max_connections=MAX_THREADS, max_keepalive_connections=MAX_THREADS
        )
    )
)
# Emulating https://github.com/googleapis/google-auth-library-python/blob/v2.29.0/google/auth/transport/requests.py#L400
http.is_mtls = False  # type: ignore[attr-defined]
# Emulating https://github.com/googleapis/python-cloud-core/blob/v2.4.1/google/cloud/client/__init__.py#L178
credentials, project = google.auth.default(scopes=Client.SCOPE)
return Client(project=project, credentials=credentials, _http=http)

However, using this I am getting an error:

E google.api_core.exceptions.Unauthorized: 401 GET https://storage.googleapis.com/storage/v1/b/foo?projection=noAcl&prettyPrint=false: Anonymous caller does not have storage.buckets.get access to the Google Cloud Storage bucket. Permission 'storage.buckets.get' denied on resource (or it may not exist).

Describe the solution you'd like

It would be nice to support docs on how to integrate httpx with google-cloud-storage using _http.

Describe alternatives you've considered

N/a

Additional context

N/a

[cojenco]

Thanks for the question. Could you talk a little bit more about your use case and why you'd like to use httpx?

We don't have more information on the roadmap for httpx support. Our auth library doesn't fully support this yet. I'll dedup this, and move to where further discussion and progress is tracked in googleapis/google-auth-library-python#1255

[jamesbraza]

Yeah this issue was about documenting the existence of workarounds for httpx users. Generally supporting httpx would more ideally solve this issue