Struct VertexAIAuth 

pub struct VertexAIAuth { /* private fields */ }

Vertex AI Bearer token authentication.

Uses a project/location pair to construct the Vertex AI WebSocket URL, and a Bearer token for the Authorization header.

Supports two token modes:

• Fixed (new): token is set once at construction. Best for WebSocket connections where the token is only needed at connect time.
• Refreshable (with_token_refresher): a closure is called on every auth_headers() invocation, ensuring fresh tokens for long-running HTTP clients (e.g., generate API calls).

Implementations

impl VertexAIAuth

pub fn new( project: impl Into<String>, location: impl Into<String>, token: impl Into<String>, ) -> VertexAIAuth

Create a new Vertex AI auth provider with a fixed token.

The token is stored and reused for all requests. Use this for WebSocket connections where the token is only needed at connect time.

pub fn with_token_refresher( project: impl Into<String>, location: impl Into<String>, refresher: impl Fn() -> String + Send + Sync + 'static, ) -> VertexAIAuth

Create a Vertex AI auth provider with a dynamic token refresher.

The refresher closure is called on every auth_headers() invocation, allowing token refresh for long-running HTTP clients. The closure should handle caching internally to avoid unnecessary overhead.

Trait Implementations

impl AuthProvider for VertexAIAuth

fn ws_url(&self, model: &GeminiModel) -> String

Build the WebSocket URL for the given model.

fn rest_url( &self, endpoint: ServiceEndpoint, model: Option<&GeminiModel>, ) -> String

Build a REST API URL for the given service endpoint and model.

fn auth_headers<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Vec<(String, String)>, AuthError>> + Send + 'async_trait>>

where 'life0: 'async_trait, VertexAIAuth: 'async_trait,

HTTP headers for the WebSocket upgrade request (e.g., Bearer token).

fn query_params(&self) -> Vec<(String, String)>

Query parameters to append to the URL (e.g., API key).

fn refresh<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(), AuthError>> + Send + 'async_trait>>

where 'life0: 'async_trait, Self: 'async_trait,

Called on auth failure to allow token refresh. Default: no-op.