Request-scoped storage support? (AsyncLocalStorage)

[cliffordfajardo]

Background context: using remix-express template which exposes underlying express server

Question:
Is there a way to pass request context down into util functions in remix without needing to explicitly pass Request or Response object to a utility function?

Outside of Remix / Other frameworks

Solidstart
With SolidStart, you can access the current request from nearly anywhere like this using getRequestEvent (powered by AsyncLocalStorage)

import { getRequestEvent } from "solid-js/web";
const event = getRequestEvent();

Python Flask
In Python with the Flask webframework, we have the g object, which is a commonly used to manage resources during a request. For example, we can augment g object with custom property and then later reference g in our utility function in another file (more on - https://flask.palletsprojects.com/en/2.3.x/appcontext/).

# Flask Middleware to add custom id
from flask import g

### in my middleware, I set a traceId
g.trace_id = uuid()

then in our util method, we can reference that traceid we set earlier^

# 
from flask import g

def do_something_sync():
  logger.warn(f'sync is about to start trace_id={g.trace_id}')

Are there similar concepts or recommended patterns with Remix?

Existing Solution(s) with Remix:

If we have access to express server (which we do with remix-express template), I know we can use middleware to augment req and res object with session specific information. Something like req.traceId.

Goal

The goal i'm aiming for is to associate each log line with a traceId for easier grouping. Sure this middleware req.traceId works, but it's limited to be used only when you have access to the req object, aka within the network call. But if you are in the middle of a util method, you can't easily access the current req object, unless you pass it down this req into each util method.

References

• Solid Start's getRequestEvent (powered by AsyncLocalStorage)
• Async Local Storage
• Fastify Request Context (powered by Async Local Storage)
• Python Flask Web Framework's g object

[cliffordfajardo]

Related: remix-run/react-router#11565