feat: add per-tenant token bucket rate limiting middleware (closes #115)#208
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elizabetheonoja-art merged 1 commit intoJul 21, 2026
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…ility-Protocol#115) - Add TenantRateLimiter with per-tenant token buckets, configurable limits, override support, and background tenant pruning - Add tenant_rate_limit_layer Axum middleware that extracts tenant from X-Tenant-ID header (falls back to _anonymous) - Add /api/v1/tenant-rate-limiter/status endpoint for observability - Integrate into AppState, router, and main.rs - Add comprehensive unit and integration tests Implements: Utility-Protocol#115
elizabetheonoja-art
merged commit Jul 21, 2026
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Utility-Protocol:main
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Summary
Implements per-tenant token bucket rate limiting middleware for the API (Issue #115).
Changes
src/api/middleware.rs— AddedTenantRateLimiterstruct with per-tenant independent token buckets, configurable limits per tenant with override support, and periodic pruning of inactive tenants. Addedtenant_rate_limit_layerAxum middleware that extracts tenant identity from theX-Tenant-IDheader (falls back to_anonymous).src/api/mod.rs— AddedTenantRateLimitertoAppStatewithFromRefimpl.src/api/router.rs— Wired in thetenant_rate_limit_layermiddleware (before existing IP-based rate limiter) and added/api/v1/tenant-rate-limiter/statusendpoint.src/api/handlers.rs— Addedtenant_rate_limiter_statushandler returning per-tenant limits and rejection counts.src/main.rs— InitializedTenantRateLimiterwith default 1000 tokens/sec.tests/rate_limit_integration.rs— Added integration tests for tenant-specific buckets, separate bucket isolation, and anonymous fallback.How it works
X-Tenant-IDheader identifying their tenantTenantRateLimiter::set_tenant_limit()(e.g., for premium tenants)_anonymousbucketCloses #115