ਛੇਤੀ ਸ਼ੁਰੂਆਤ: Next.js

http://localhost:3000/auth/callback

USHER_ISSUER=https://acme.usherid.com
USHER_CLIENT_ID=your_client_id
USHER_CLIENT_SECRET=your_client_secret
APP_URL=http://localhost:3000

pnpm add openid-client

import * as client from 'openid-client'

let config: Promise<client.Configuration> | undefined

export function usher() {
  config ??= client.discovery(
    new URL(process.env.USHER_ISSUER!),
    process.env.USHER_CLIENT_ID!,
    process.env.USHER_CLIENT_SECRET!,
  )
  return config
}

export const redirectUri = `${process.env.APP_URL}/auth/callback`

import * as client from 'openid-client'
import { cookies } from 'next/headers'
import { redirect } from 'next/navigation'
import { redirectUri, usher } from '@/lib/usher'

export async function GET() {
  const config = await usher()
  const codeVerifier = client.randomPKCECodeVerifier()
  const state = client.randomState()

  const jar = await cookies()
  jar.set('usher_flow', JSON.stringify({ codeVerifier, state }), {
    httpOnly: true,
    secure: process.env.NODE_ENV === 'production',
    sameSite: 'lax',
    path: '/auth',
    maxAge: 600,
  })

  const url = client.buildAuthorizationUrl(config, {
    redirect_uri: redirectUri,
    scope: 'openid profile email offline_access',
    code_challenge: await client.calculatePKCECodeChallenge(codeVerifier),
    code_challenge_method: 'S256',
    state,
  })
  redirect(url.href)
}

import * as client from 'openid-client'
import { cookies } from 'next/headers'
import { redirect } from 'next/navigation'
import { usher } from '@/lib/usher'

export async function GET(request: Request) {
  const config = await usher()
  const jar = await cookies()
  const flow = JSON.parse(jar.get('usher_flow')?.value ?? '{}')
  jar.delete('usher_flow')

  const tokens = await client.authorizationCodeGrant(config, new URL(request.url), {
    pkceCodeVerifier: flow.codeVerifier,
    expectedState: flow.state,
  })
  const claims = tokens.claims()! // sub, email, name, …

  // start your own session here: store claims.sub, and keep the refresh token server-side
  redirect('/')
}

import * as client from 'openid-client'
import { redirect } from 'next/navigation'
import { usher } from '@/lib/usher'

export async function GET() {
  const config = await usher()
  // clear your own session first
  const url = client.buildEndSessionUrl(config, {
    post_logout_redirect_uri: process.env.APP_URL!,
  })
  redirect(url.href)
}