pub struct RateLimiter { /* private fields */ }Expand description
An in-memory sliding-window rate limiter, keyed by an arbitrary string (IP, user id, scope-qualified key — the caller decides).
Cheap to clone the configured Rate; the shared counter map sits
behind a Mutex so a single RateLimiter can back many concurrent
requests. Wrap in an Arc to share across handlers.
Implementations§
Source§impl RateLimiter
impl RateLimiter
Sourcepub fn check(&self, key: &str) -> RateDecision
pub fn check(&self, key: &str) -> RateDecision
Check (and, if allowed, record) one request for key against the
configured rate, using the real wall clock.
See Self::check_at for the deterministic, clock-injectable
variant the tests drive.
Sourcepub fn check_at(&self, key: &str, now: Instant) -> RateDecision
pub fn check_at(&self, key: &str, now: Instant) -> RateDecision
Clock-injectable core: identical to Self::check but the caller
supplies now. Private-ish (crate-visible) so deterministic tests
can advance time without sleeping; production always routes through
Self::check with Instant::now().
Sourcepub fn clear(&self, key: &str)
pub fn clear(&self, key: &str)
Forget every recorded request for key, resetting its window so the
next check starts from a clean budget.
The “success forgives” primitive: a caller that wants a prior burst of denied attempts to stop counting after some positive outcome (e.g. umbral-auth clears the login counter on a SUCCESSFUL login so a user who fat-fingered their password isn’t locked out) calls this to drop the key’s history. A no-op if the key was never seen.
Trait Implementations§
Auto Trait Implementations§
impl !Freeze for RateLimiter
impl RefUnwindSafe for RateLimiter
impl Send for RateLimiter
impl Sync for RateLimiter
impl Unpin for RateLimiter
impl UnsafeUnpin for RateLimiter
impl UnwindSafe for RateLimiter
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