如何在 nextjs 12 middlware 中获得下一个身份验证会话

Question

I was experimenting with the new nextjs features and while using next-auth inside the pages/_middleware.ts this doesn't seem to work

import { getSession } from 'next-auth/client';
import type { NextFetchEvent, NextRequest } from 'next/server'
import {NextResponse} from 'next/server'
async function middleware(req: NextRequest, ev: NextFetchEvent) {
    let session = await getSession({ req });

      return new Response('Auth required', {
        status: 401,
        headers: {
          'WWW-Authenticate': 'Basic realm="Secure Area"',
        },
      })
}
export {middleware}

this works in api routes but the "req" object is NextApiRequest unlike here. so how can i get the user object inside the middleware so i can do a role/authentication check.

Answer 1

What worked for me was to use the helper function getToken() and decrypt the session information from the token which will be sent along with the request, ie req parameter

Here is a sample of my _middleware.ts

export async function middleware(
  req: NextApiRequest,
  ev: NextFetchEvent
) {
  const token = await getToken({
    req,
    secret: process.env.SECRET,
  });
  console.log("from middleware ", token);
  return NextResponse.next();
}

Note process.env.SECRET refers to the secret you used in your [...nextauth].ts configuration for jwt