Request and WebSocket Context in Services

Inject fastapi.Request or fastapi.WebSocket into scoped services when your service logic needs connection context.

Enable Request/WebSocket Context Injection

Include the FastAPI integration module in container injectables:

import wireup
import wireup.integration.fastapi

container = wireup.create_async_container(
    injectables=[services, wireup.integration.fastapi],
)

Inject fastapi.Request

import fastapi
from wireup import injectable


@injectable(lifetime="scoped")
class HttpAuthenticationService:
    def __init__(self, request: fastapi.Request) -> None:
        self.request = request

    def current_user_id(self) -> str:
        return self.request.headers["x-user-id"]

Inject fastapi.WebSocket

import fastapi
from wireup import injectable


@injectable(lifetime="scoped")
class WebSocketSessionService:
    def __init__(self, websocket: fastapi.WebSocket) -> None:
        self.websocket = websocket

    async def send_welcome(self) -> None:
        await self.websocket.send_text("connected")

Use Alongside Route Injection

Route handlers still use Injected[...] as usual:

from wireup import Injected


@app.get("/me")
async def me(auth: Injected[HttpAuthenticationService]):
    return {"user_id": auth.current_user_id()}

For route signature patterns, see Inject in Routes.