feat(asyncfast): Add middleware

[jackburridge]

Add middleware to AsyncFast

from time import monotonic

from amgi_types import AMGIApplication
from amgi_types import AMGIReceiveCallable
from amgi_types import AMGISendCallable
from amgi_types import Scope
from asyncfast import AsyncFast


class TimingMiddleware:
    def __init__(self, app: AMGIApplication) -> None:
        self._app = app

    async def __call__(
        self, scope: Scope, receive: AMGIReceiveCallable, send: AMGISendCallable
    ) -> None:
        start = monotonic()
        await self._app(scope, receive, send)
        duration_ms = (monotonic() - start) * 1000
        print(f"{scope['type']} handled in {duration_ms:.2f}ms")


app = AsyncFast()
app.add_middleware(TimingMiddleware)


@app.channel("orders")
async def handle_order(order_id: int) -> None:
    print(f"processing order {order_id}")

This can be used for logging, timing, tracing, metrics, or translating errors.

[read-the-docs-community]

Documentation build overview

📚 AsyncFast | 🛠️ Build #31494988 | 📁 Comparing 53edd71 against latest (942057c)

🔍 Preview build

Show files changed (4 files in total): 📝 3 modified | ➕ 1 added | ➖ 0 deleted

File	Status
dependencies.html	📝 modified
message_headers.html	📝 modified
middleware.html	➕ added
sending.html	📝 modified

[codecov]

Codecov Report

❌ Patch coverage is 99.65517% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
packages/asyncfast/src/asyncfast/_channel.py	98.14%	1 Missing ⚠️

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