Trait Backend

Source

pub trait Backend: Send + Sync {
    // Required methods
    fn id(&self) -> &str;
    fn evaluate(
        &self,
        req: WireRequest,
        deadline: Instant,
    ) -> impl Future<Output = Result<Evaluated, BackendError>> + Send;

    // Provided method
    fn replace_api_key(
        &self,
        key: Option<String>,
    ) -> Result<Option<String>, Error> { ... }
}

Required Methods§

Source

fn id(&self) -> &str

Source

fn evaluate( &self, req: WireRequest, deadline: Instant, ) -> impl Future<Output = Result<Evaluated, BackendError>> + Send

Provided Methods§

Source

fn replace_api_key(&self, key: Option<String>) -> Result<Option<String>, Error>

Replace the bearer key used by the next evaluate.

The default ignores every key, including an empty string, and returns Ok(None). Backends that store a bearer token refuse "" and leave the previous key in place. On success the returned value is the previous key, so a cascade can restore it if the other hop refuses. A call that has already entered evaluate keeps the key it copied.