async-context-middleware

Request-scoped async context middleware for Remix. It stores each request context in AsyncLocalStorage so utilities can access it anywhere in the same async call stack.

Features

• Request Context Access - Read request context from anywhere in the same async execution flow
• Simple Router Integration - Add a single middleware at the router level
• Node Async Hooks - Built on node:async_hooks AsyncLocalStorage

Installation

npm i remix

Usage

Simply use the asyncContext() middleware at the router level to make the request context available to all functions in the same async execution context. Get access to the context using the getContext() function.

import { createRouter } from 'remix/fetch-router'
import { asyncContext, getContext } from 'remix/async-context-middleware'

let router = createRouter({
  middleware: [asyncContext()],
})

router.get('/users/:id', async () => {
  // Access context from anywhere in the async call stack
  let context = getContext()
  let userId = context.params.id

  return new Response(`User ${userId}`)
})

Note: This middleware requires support for node:async_hooks.

Related Packages

• fetch-router - Router for the web Fetch API

License

See LICENSE