Skip to main content Module middleware Copy item path Source pub use store::CircuitAction ;pub use store::CircuitBreakerStore ;pub use store::RateLimitStore ;pub use store::SlidingWindowStore ;store BandwidthThrottle Tower layer that throttles response body throughput to simulate slow
connections. BlockList Tower layer that blocks requests matching a predicate and returns a
configurable error response (default: 403 Forbidden). CircuitBreaker Tower layer that implements the circuit breaker pattern. Conditional Tower layer that conditionally applies middlewares based on per-request
predicates. ContentDecoder Tower layer that transparently decompresses response bodies. FaultInjector Tower layer that randomly injects faults into proxied requests. InMemoryCircuitBreakerStore In-memory circuit breaker store backed by a HashMap. InMemoryRateLimitStore In-memory token-bucket store backed by a HashMap. InMemorySlidingWindowStore In-memory sliding-window store backed by a HashMap. LatencyInjector Tower layer that adds artificial latency before forwarding requests. ModifyHeaders Tower layer that adds, replaces, or removes HTTP headers on requests
and/or responses. Next Handle to the next service in the middleware chain. RateLimiter Tower layer that rate-limits requests using a token bucket algorithm. Retry Tower layer that retries requests when upstream returns specific status codes. Router Tower layer that routes requests to different upstreams based on predicates. SetResponse Tower layer that ignores the upstream and returns a fixed response. SlidingWindow Sliding window log algorithm: stores a VecDeque<Instant> of request
timestamps per key. On each request, entries older than window are
drained. If the window has capacity (len < count), the request proceeds
immediately. Otherwise, the request sleeps until the oldest entry expires
and a slot opens. TrafficLogger Tower layer that logs HTTP request/response traffic. Upstream One or more backend URLs with a load-balancing strategy. UrlRewrite Tower layer that rewrites request URI paths before forwarding upstream. LoadBalanceStrategy Load-balancing strategy for upstreams with multiple backends. ConditionalLayer Extension trait that lets any tower layer add a condition directly. from_fn Create a tower Layer