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Starlette | Skills Pool

Archivo del skill

Starlette

Applies when building or reviewing Starlette applications. Covers middleware, lifespan events, streaming, WebSockets, and background tasks.

BillSchumacher0 estrellas12 abr 2026

Ocupación
Categorías: Contenedores

Contenido de la habilidad

Middleware and lifespan

Middleware executes outermost-first for requests (onion model). CORSMiddleware before auth. TrustedHostMiddleware early.
Use lifespan context manager, not deprecated on_startup/on_shutdown.
Use Request.state to pass data between middleware and handlers.

Responses

BackgroundTask for fire-and-forget after response. Runs after response completes. For concurrent work, use a task queue.
StreamingResponse for large payloads. Async generator avoids loading everything into memory.
WebSocket handlers must explicitly accept, receive, close. Handle WebSocketDisconnect. Use try/finally.

Routing and testing

Register exception handlers on the app for HTTP errors.

Skills relacionados

Instalación rápida

Starlette

npx skillvault add BillSchumacher/billschumacher-claude-stuff-plugins-starlette-skills-starlette-skill-md

Descargar Skill Abrir repositorio

Autor: BillSchumacher
estrellas: 0
Actualizado: 12 abr 2026
Ocupación

En esta página

01Middleware and lifespan

Mount static files with explicit prefix. Never from application root.

TestClient (httpx) for testing. with TestClient(app) as client: fires lifespan events.

Handle ClientDisconnect in long-running endpoints. Check is_disconnected() periodically.

Never allow_origins=["*"] with allow_credentials=True. Forbidden by CORS spec.

Use explicit response types (PlainTextResponse, HTMLResponse, JSONResponse) for correct Content-Type.

02

Responses

03Routing and testing

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