Auth.js middleware for Hono

This is a Auth.js third-party middleware for Hono.

This middleware can be used to inject the Auth.js session into the request context.

Installation

npm i hono @hono/auth-js @auth/core

Configuration

Before starting using the middleware you must set the following environment variables:

AUTH_SECRET=#required
AUTH_URL=#optional

How to Use

import { Hono, Context } from 'hono'
import { authHandler, initAuthConfig, verifyAuth, type AuthConfig } from "@hono/auth-js"
import GitHub from "@auth/core/providers/github"

const app = new Hono()

app.use("*", initAuthConfig(getAuthConfig))

app.use("/api/auth/*", authHandler())

app.use('/api/*', verifyAuth())

app.get('/api/protected', (c) => {
  const auth = c.get("authUser")
  return c.json(auth)
})

function getAuthConfig(c: Context): AuthConfig {
  return {
    secret: c.env.AUTH_SECRET,
    providers: [
      GitHub({
        clientId: c.env.GITHUB_ID,
        clientSecret: c.env.GITHUB_SECRET
      }),
    ]
  }
}

export default app

React component

import { SessionProvider } from "@hono/auth-js/react"

export default  function App() {

  return (
    <SessionProvider>
       <Children />
    </SessionProvider>
  )
}

function Children() {
  const { data: session, status } = useSession()
  return (
    <div >
     I am {session?.user}
    </div>
  )
}

Default /api/auth path can be changed to something else but that will also require you to change path in react app.

import {SessionProvider,authConfigManager,useSession } from "@hono/auth-js/react"

authConfigManager.setConfig({
  baseUrl: '', //needed  for cross domain setup.
  basePath: '/custom', // if auth route is diff from /api/auth
  credentials:'same-origin' //needed  for cross domain setup
});

export default  function App() {
  return (
    <SessionProvider>
      <Children />
    </SessionProvider>
  )
}

function Children() {
  const { data: session, status } = useSession()
  return (
    <div >
     I am {session?.user}
    </div>
  )
}

For cross domain setup as mentioned above you need to set these cors headers in hono along with change in same site cookie attribute.Read More Here

app.use(
  "*",
  cors({
    origin: (origin) => origin,
    allowHeaders: ["Content-Type"],
    credentials: true,
  })
)

SessionProvider is not needed with react query.This wrapper is enough

const useSession = ()=>{
  const { data ,status } = useQuery({
  queryKey: ["session"],
  queryFn: async () => {
    const res = await fetch("/api/auth/session")
    return res.json();
  },
  staleTime: 5 * (60 * 1000),
  gcTime: 10 * (60 * 1000),
  refetchOnWindowFocus: true,
})
 return { session:data, status }
}

[!WARNING] You can't use event updates which SessionProvider provides and session will not be in sync across tabs if you use react query wrapper but in RQ5 you can enable this using Broadcast channel (see RQ docs).

Working example repo https://github.com/divyam234/next-auth-hono-react

Author

Divyam https://github.com/divyam234