[FIXED] aiohttp.ClientSession() in Quart

Issue

How can I create an aiohttp.ClientSession() once so that I can use it when a request is received? And I'd like to deploy this later with Gunicorn as well.

Solution

You can use a startup function via the before_serving decorator,

@app.before_serving
async def startup():
    app.client = aiohttp.ClientSession()

@app.get("/")
async def index():
    await app.client.get(...)

As Quart is a ASGI framework you'll need to use an ASGI server such as Hypercorn rather than Gunicorn (a WSGI server).

Answered By - pgjones