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SubscriptionRateLimiter

cratestack::ratelimit

Struct SubscriptionRateLimiter 

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pub struct SubscriptionRateLimiter { /* private fields */ }
Expand description

Charges one token per subscription open. Build it with RateLimitLayer::for_subscriptions (sharing that layer’s store and settings) or SubscriptionRateLimiter::new, and hand it to WebSocketConfig::rate_limit / WebTransportConfig::rate_limit.

The bucket key follows the HTTP layer’s precedence on an already verified session: princ:<sha256 of the principal key>, else ip:<peer> (IPv6 aggregated to its /64), else the open is refused failed_precondition (HTTP’s 412 rule, cratestack#416). No auth: key is ever minted: identity is verified before admission.

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impl SubscriptionRateLimiter

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pub fn new( store: Arc<dyn RateLimitStore>, config: RateLimitConfig, ) -> SubscriptionRateLimiter

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pub fn with_store_error_policy( self, policy: StoreErrorPolicy, ) -> SubscriptionRateLimiter

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pub fn with_store_timeout(self, timeout: Duration) -> SubscriptionRateLimiter

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pub fn with_op_resolver( self, resolver: impl Fn(&str) -> OpAdmission + Send + Sync + 'static, ) -> SubscriptionRateLimiter

Which ops are charged, by op id. The default charges all of them, because subscription ops cannot be @no_rate_limit; this hook exists for parity with RateLimitLayer::with_op_resolver.

Trait Implementations§

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impl Clone for SubscriptionRateLimiter

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fn clone(&self) -> SubscriptionRateLimiter

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SubscriptionRateLimiter

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl SubscriptionRateLimit for SubscriptionRateLimiter

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fn admit<'life0, 'life1, 'async_trait>( &'life0 self, charge: SubscriptionCharge<'life1>, ) -> Pin<Box<dyn Future<Output = Result<(), SubscriptionRefusal>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, SubscriptionRateLimiter: 'async_trait,

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