This is the xitca-web workspace, a high-performance, modular async web framework in Rust. It provides server and client capabilities for HTTP/1, HTTP/2, and HTTP/3, along with WebSocket, gRPC, TLS (rustls, OpenSSL, native-tls), static file serving, content compression (brotli, gzip, deflate, zstd), multipart form handling, and rate limiting. The framework is built on a core `Service`/`ReadyService` trait system that allows composable middleware pipelines, similar to Tower but with its own ergonomic design. It also includes an async PostgreSQL driver with full protocol support, connection pooling, and io_uring integration. The architecture is organized into many focused crates (`xitca-http`, `xitca-server`, `xitca-client`, `xitca-service`, `xitca-router`, `xitca-io`, etc.), all within a single workspace. Key strengths include zero-copy buffer management, custom protocol implementations (HPACK, QPACK) with security mitigation for known HTTP/2 vulnerabilities, and a flexible handler extraction system. The codebase demonstrates high craftsmanship with extensive testing, benchmarks, and security-conscious design, though it contains some unsafe code and has a large feature flag surface.