async-context-middleware

Middleware for storing request context in AsyncLocalStorage for use with @remix-run/fetch-router.

This middleware stores the request context in AsyncLocalStorage (using node:async_hooks), making it available to all functions in the same async execution context.

Installation

npm install @remix-run/async-context-middleware

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-run/fetch-router'
import { asyncContext, getContext } from '@remix-run/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