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SKILL.md
npx skills add actionbook/rust-skills --skill domain-web
Use when building web services. Keywords: web server, HTTP, REST API, GraphQL, WebSocket, axum, actix, warp, rocket, tower, hyper, reqwest, middleware, router, handler, extractor, state management, authentication, authorization, JWT, session, cookie, CORS, rate limiting, web 开发, HTTP 服务, API 设计, 中间件, 路由
npx skills add actionbook/rust-skills --skill domain-web
Layer 3: Domain Constraints
| Domain Rule | Design Constraint | Rust Implication |
|---|---|---|
| Stateless HTTP | No request-local globals | State in extractors |
| Concurrency | Handle many connections | Async, Send + Sync |
| Latency SLA | Fast response | Efficient ownership |
| Security | Input validation | Type-safe extractors |
| Observability | Request tracing | tracing + tower layers |
From constraints to design (Layer 2):
| Framework | Style | Best For |
|---|---|---|
| axum | Functional, tower | Modern APIs |
| actix-web | Actor-based | High performance |
| warp | Filter composition | Composable APIs |
| rocket | Macro-driven | Rapid development |
| Purpose | Crate |
|---|---|
| HTTP server | axum, actix-web |
| HTTP client | reqwest |
| JSON | serde_json |
| Auth/JWT | jsonwebtoken |
| Session | tower-sessions |
| Database | sqlx, diesel |
| Middleware | tower |
| Pattern | Purpose | Implementation |
|---|---|---|
| Extractors | Request parsing | State(db), Json(payload) |
| Error response | Unified errors | impl IntoResponse |
| Middleware | Cross-cutting | Tower layers |
| Shared state | App config | Arc<AppState> |
| Mistake | Domain Violation | Fix |
|---|---|---|
| Blocking in handler | Latency spike | spawn_blocking |
| Rc in state | Not Send + Sync | Use Arc |
| No validation | Security risk | Type-safe extractors |
| No error response | Bad UX | IntoResponse impl |
| Constraint | Layer 2 Pattern | Layer 1 Implementation |
|---|---|---|
| Async handlers | Async/await | tokio runtime |
| Thread-safe state | Shared state | Arc, Arc<RwLock> |
| Request lifecycle | Extractors | Ownership via From |
| Middleware | Tower layers | Trait-based composition |
| When | See |
|---|---|
| Async patterns | m07-concurrency |
| State management | m02-resource |
| Error handling | m06-error-handling |
| Middleware design | m12-lifecycle |
"Need shared application state"
↓ m07-concurrency: Use Arc for thread-safe sharing
↓ m02-resource: Arc<RwLock<T>> for mutable state
"Need request validation"
↓ m05-type-driven: Validated extractors
↓ m06-error-handling: IntoResponse for errors
"Need middleware stack"
↓ m12-lifecycle: Tower layers
↓ m04-zero-cost: Trait-based compositionasync fn handler(
State(db): State<Arc<DbPool>>,
Json(payload): Json<CreateUser>,
) -> Result<Json<User>, AppError> {
let user = db.create_user(&payload).await?;
Ok(Json(user))
}
// Error handling
impl IntoResponse for AppError {
fn into_response(self) -> Response {
let (status, message) = match self {
Self::NotFound => (StatusCode::NOT_FOUND, "Not found"),
Self::Internal(_) => (StatusCode::INTERNAL_SERVER_ERROR, "Internal error"),
};
(status, Json(json!({"error": message}))).into_response()
}
}