Crate sz_orm_limit 

SZ-ORM Limit — Rate Limiter

Provides token bucket and sliding window rate limiting, with built-in OOM protection (default max_keys=10000).

Main types

• RateLimiter trait — rate limiter interface
• TokenBucketLimiter — token bucket implementation
• SlidingWindowLimiter — sliding window implementation

v0.2.1 fixes Critical S-3: introduces DEFAULT_MAX_KEYS to prevent unbounded keys from causing OOM.

Re-exports

pub use composite::CompositeLimiter;

pub use composite::CompositeStrategy;

pub use composite::FallbackLimiter;

pub use composite::LimitKeyBuilder;

pub use composite::RateLimitRule;

pub use composite::RuleSet;

pub use concurrency::ConcurrencyGuard;

pub use concurrency::ConcurrencyLimiter;

pub use concurrency::ConcurrencyStats;

pub use concurrency::TimedConcurrencyLimiter;

pub use config_builder::ConfigError;

pub use config_builder::LimitAlgorithm;

pub use config_builder::RateLimitConfig;

pub use config_builder::RateLimitConfigBuilder;

pub use config_builder::TieredConfigBuilder;

pub use config_builder::TieredRateLimitConfig;

pub use leaky_bucket::LeakyBucketLimiter;

pub use leaky_bucket::LeakyBucketStats;

pub use leaky_bucket::SlidingWindowLogLimiter;

pub use metrics::Alert;

pub use metrics::MetricsSnapshot;

pub use metrics::RateLimitMetrics;

pub use metrics::RateLimitMonitor;

Modules

composite

限流策略组合器（Composite Limiter）

concurrency

并发限流器（Concurrency Limiter）

config_builder

限流配置构建器（Rate Limit Config Builder）

leaky_bucket

漏桶限流器（Leaky Bucket Limiter）

metrics

限流统计与监控（Rate Limit Metrics）

Structs

DistributedRateLimiter

Distributed rate limiter

FixedWindowRateLimiter

Fixed window rate limiter

InMemoryBackend

In-memory backend (simulates Redis)

MultiRateLimiter

Multi-dimensional rate limiting strategy

RateLimitHeaders

Rate limit response headers

RateLimitResponse

Rate limit response

RateLimitResult

SlidingWindowRateLimiter

TokenBucketRateLimiter

Enums

RateLimitError

RateLimitResponseStrategy

Rate limit response strategy

Constants

DEFAULT_MAX_KEYS

Default maximum number of keys (added in v0.2.1, fixes Critical S-3 OOM DoS)

Traits

DistributedBackend

Distributed backend trait

RateLimiter