Crate gauth 

HTTP client for Google OAuth2.

This crate covers two Google auth flows:

• app — OAuth2 for installed apps. Three-legged flow with a consent URI, auth code exchange, and a refresh-token loop. Tokens are cached on disk so subsequent calls reuse them until they expire.
• serv_account — Service accounts. JWT-bearer flow for server-to-server auth using a Google-issued JSON key. Tokens are cached in-memory on the ServiceAccount instance.

Optional features

• app-blocking — adds [app::Auth::access_token_blocking], a synchronous wrapper around the async access-token call. Useful when plugging gauth into a synchronous integration point (e.g. a tonic interceptor).
• token-watcher — adds [token_provider::AsyncTokenProvider], a daemon that periodically refreshes a token in the background and exposes a synchronous read accessor over a shared cache.

See the crate README for usage examples.

Modules

app

OAuth2 for installed apps (three-legged consent flow).

serv_account

Service-account JWT-bearer flow for server-to-server auth.