Backend protocols in Rust

❯ cat documents/

• -rw-r--r-- Backend protocols in Rust — the map Concept 2026-08-09

  How REST, GraphQL, gRPC, WebSockets/SSE and messaging map onto the de-facto crates — axum/reqwest, async-graphql, tonic, tokio-tungstenite, rdkafka/lapin/async-nats.

• -rw-r--r-- API documentation in Rust Concept 2026-08-09

  OpenAPI, AsyncAPI, protobuf and GraphQL SDL tooling for Axum, Actix Web and Rocket — utoipa and friends, tonic-build, async-graphql SDL export — where derive-macro code-first dominates and contract-first usually means gRPC.

• -rw-r--r-- GraphQL in Rust Concept 2026-08-09

  async-graphql as the modern default and juniper as the elder — code-first schemas from derives, dataloaders against N+1, subscriptions, and the client-side crates.

• -rw-r--r-- gRPC in Rust — tonic & prost Concept 2026-08-09

  tonic as the de-facto gRPC stack — prost codegen from .proto, tonic-build and buf, all four streaming modes on Tokio, tower middleware sharing, and the operational endpoints.

• -rw-r--r-- Messaging in Rust — Kafka, AMQP & NATS Concept 2026-08-09

  rdkafka over librdkafka for Kafka, lapin for RabbitMQ/AMQP, the official async-nats — consumer patterns on Tokio, offset and ack discipline, and serde at the payload boundary.

• -rw-r--r-- REST & HTTP APIs in Rust Concept 2026-08-09

  Building REST services on axum/actix — serde realities, validation, utoipa and the OpenAPI workflows, error shapes as IntoResponse, and reqwest on the client side.

• -rw-r--r-- WebSockets & SSE in Rust Concept 2026-08-09

  tokio-tungstenite as the protocol workhorse, axum's WebSocketUpgrade and Sse built-ins, actix-ws, connection-state patterns with channels, and backpressure on Tokio.