Packages

The Pingora workspace has 21 member crates. They divide into a few groups.

Public-facing umbrella

• pingora — the crate most users depend on. Re-exports the others under a feature-gated module structure.

Core framework

• pingora-core — Server, Service, listeners, connectors, HTTP/1, HTTP/2, modules. The biggest crate.
• pingora-proxy — Programmable HTTP proxy framework.
• pingora-cache — HTTP caching state machine.
• pingora-http — HTTP request/response header types preserving case.
• pingora-error — Common error type and Result alias.

Networking primitives

• pingora-pool — Generic connection pool.
• pingora-runtime — Tokio runtime wrapper.
• pingora-timeout — Faster async timer.

Load balancing and limits

• pingora-load-balancing — Backend selection, health checks, discovery.
• pingora-ketama — Ketama consistent hashing.
• pingora-limits — Rate limiting primitives.

Caching utilities

• pingora-lru — Sharded LRU.
• pingora-memory-cache — Async in-memory cache with read-through.
• tinyufo — TinyLFU/S3-FIFO admission and eviction.

TLS backends

• tls — Overview of the four TLS implementations: pingora-openssl, pingora-boringssl, pingora-rustls, pingora-s2n.

Other

• pingora-prometheus — Prometheus metrics service.
• pingora-header-serde — Compressed HTTP header serialization.