The OCR route called back into Python's get_secret_str for every env
fallback. With no secret manager configured that is os.environ behind a GIL
hop, and with one configured it blocked a tokio worker on vault I/O and also
sent the Azure and GCP identity variables, which Python reads with os.getenv,
to the vault. The other Rust routes already read the process environment.
Read the process environment here too. When litellm would read secrets from
a secret manager, decline the Rust route so the Python route serves the call
with the vault-backed keys
Python resolves the Vertex project and location as call params, then the
litellm.vertex_project / litellm.vertex_location globals, then env, and
Azure AD token refresh from litellm.enable_azure_ad_token_refresh alone.
Native OCR skipped the globals, so a config.yaml litellm_settings value
silently fell through to the credential's project and us-central1, and a
managed identity setup without an API key failed. The bridge now reads
them through a provider_defaults settings group into OcrSettings, and
VertexConfig / AzureAuthInputs slot them in at Python's precedence.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
litellm.user_url_validation and litellm.user_url_allowed_hosts are only implemented by the Python document fetcher, so an allowlisted internal document was rejected by the Rust route's network policy. The bridge now declines when either is changed from its default
Python's aiohttp transport reads HTTP(S)_PROXY on every request unless disable_aiohttp_trust_env is set, so the Rust clients now do the same instead of requiring aiohttp_trust_env. Transport error messages include reqwest's source chain, so a rejected certificate or refused connection is no longer reported as just 'error sending request'
Honor environment proxies whenever Python would use httpx (sync calls, HTTP/2, aiohttp disabled), apply the per-call ssl_verify argument, ignore empty or missing SSL env values the way http_handler.py does, expire pooled clients after an hour so rotated certificates reload, keep the client certificate off media downloads, and decline instead of raising when a litellm global has an unexpected type
Drop the core ocr() facade so VertexAuth and the http pool stay out of litellm-core's
public API, move the http Error enum to error.rs, and inject the media DNS resolver into
HttpClientPool instead of a per-call builder hook the cache key ignored.
The bridge now reads litellm.* HTTP settings only through litellm/rust_bridge/settings.py,
pinned by python_settings.json, while env overrides stay in Rust. This adds the Python
default User-Agent, parses string ssl_verify globals like get_ssl_verify, drops per-call
ssl_verify that Python OCR never honored, and removes the unused request_timeout.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
