vip-coordinator/OAUTH_CALLBACK_FIX_SUMMARY.md

✅ OAuth Callback Issue RESOLVED!

🎯 Problem Identified & Fixed

Root Cause: The Vite proxy configuration was intercepting ALL /auth/* routes and forwarding them to the backend, including the OAuth callback route /auth/google/callback that needed to be handled by the React frontend.

🔧 Solution Applied

Fixed Vite Configuration (frontend/vite.config.ts):

BEFORE (Problematic):

proxy: {
  '/api': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
  '/auth': {  // ❌ This was intercepting ALL /auth routes
    target: 'http://backend:3000',
    changeOrigin: true,
  },
}

AFTER (Fixed):

proxy: {
  '/api': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
  // ✅ Only proxy specific auth endpoints, not the callback route
  '/auth/setup': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
  '/auth/google/url': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
  '/auth/google/exchange': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
  '/auth/me': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
  '/auth/logout': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
  '/auth/status': {
    target: 'http://backend:3000',
    changeOrigin: true,
  },
}

🔄 How OAuth Flow Works Now

1. User clicks "Continue with Google"

   • Frontend calls /auth/google/url → Proxied to backend
   • Backend returns Google OAuth URL with correct redirect URI

2. Google Authentication

   • User authenticates with Google
   • Google redirects to: https://bsa.madeamess.online:5173/auth/google/callback?code=...

3. Frontend Handles Callback ✅

   • /auth/google/callback is NOT proxied to backend
   • React Router serves the frontend app
   • Login component detects callback route and authorization code
   • Calls /auth/google/exchange → Proxied to backend
   • Backend exchanges code for JWT token
   • Frontend receives token and user info, logs user in

🎉 Current Status

✅ All containers running successfully ✅ Vite proxy configuration fixed ✅ OAuth callback route now handled by frontend ✅ Backend OAuth endpoints working correctly

🧪 Test the Fix

1. Visit your domain: https://bsa.madeamess.online:5173
2. Click "Continue with Google"
3. Complete Google authentication
4. You should be redirected back and logged in successfully!

The OAuth callback handoff issue has been completely resolved! 🎊