Fix redirect loops and SSR hydration issues in auth flow
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- Replace ref with useState in useAuth for SSR compatibility - Move navigation logic from top-level to onMounted hooks - Add guest middleware to login page to prevent auth conflicts - Simplify dashboard auth checks by relying on middleware - Add loading state to index page during auth resolution This prevents infinite redirect loops and hydration mismatches that occurred during server-side rendering when navigating between authenticated and unauthenticated states.
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# 🎯 REDIRECT LOOP SOLUTION - COMPREHENSIVE FIX
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## 🚨 **THE PROBLEM**
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**Endless redirect loop** between `/login` ↔ `/dashboard` caused by multiple conflicting auth checks running simultaneously and SSR/hydration mismatches.
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## 🔍 **ROOT CAUSE ANALYSIS**
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### **The Critical Issues Found:**
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1. **`pages/index.vue`**: Top-level `await navigateTo()` caused SSR/hydration issues
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2. **Multiple Auth Checks**: Same auth state being checked in plugins, middleware, and onMounted hooks
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3. **Race Conditions**: Plugin, middleware, and component lifecycle all checking auth simultaneously
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4. **SSR Mismatches**: Server and client had different auth states during hydration
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5. **Missing Middleware**: Login page didn't use guest middleware to handle authenticated users
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### **The Redirect Loop Flow:**
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1. User visits site → `index.vue` top-level navigation (SSR issues)
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2. Plugin checks auth → Sets user state
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3. Login page `onMounted` checks auth → Finds user → Redirects to `/dashboard`
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4. Dashboard middleware checks auth → User might not be set yet → Redirects to `/login`
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5. **INFINITE LOOP** 🔄
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## ✅ **THE COMPLETE SOLUTION**
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### **1. Fixed `pages/index.vue` - Eliminated SSR Issues**
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```vue
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<template>
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<div class="loading-container">
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<!-- Loading spinner -->
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</div>
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</template>
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<script setup lang="ts">
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// ❌ REMOVED: await navigateTo() at top level (causes SSR issues)
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// ✅ ADDED: Client-side only navigation in onMounted
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onMounted(() => {
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const { isAuthenticated } = useAuth();
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// Route after component is mounted (client-side only)
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if (isAuthenticated.value) {
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navigateTo('/dashboard');
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} else {
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navigateTo('/login');
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}
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});
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</script>
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```
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**Why this works:**
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- ❌ No top-level async operations that break SSR
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- ✅ Client-side only navigation prevents hydration mismatches
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- ✅ Clean loading state while routing decision is made
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### **2. Fixed Login Page - Proper Middleware Usage**
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```vue
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<script setup lang="ts">
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definePageMeta({
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layout: false,
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middleware: 'guest' // ✅ This prevents authenticated users from accessing login
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});
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// ❌ REMOVED: onMounted auth check (conflicts with middleware)
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// ✅ ADDED: Only auto-focus behavior
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onMounted(() => {
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// Only auto-focus, no auth check needed - guest middleware handles it
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nextTick(() => {
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const usernameField = document.querySelector('input[type="text"]');
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if (usernameField) usernameField.focus();
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});
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});
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</script>
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```
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**Why this works:**
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- ✅ Guest middleware handles authenticated user redirects properly
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- ❌ No conflicting auth checks in onMounted
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- ✅ Single responsibility: middleware for auth, component for UI
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### **3. Fixed Dashboard Index - Removed Duplicate Checks**
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```vue
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<script setup lang="ts">
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definePageMeta({
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middleware: 'auth',
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layout: 'dashboard'
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});
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// ❌ REMOVED: await checkAuth() (middleware already did this)
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// ✅ ADDED: Simple tier-based routing
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onMounted(() => {
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// Auth middleware has already verified authentication - just route to tier page
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if (user.value && userTier.value) {
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const tierRoute = `/dashboard/${userTier.value}`;
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navigateTo(tierRoute, { replace: true });
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} else {
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// Fallback - middleware should have caught this
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navigateTo('/login');
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}
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});
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</script>
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```
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**Why this works:**
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- ✅ Auth middleware ensures user is authenticated before component loads
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- ❌ No duplicate auth checks that could conflict
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- ✅ Simple tier-based routing logic
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### **4. Made Auth State SSR-Compatible**
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```typescript
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// composables/useAuth.ts
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export const useAuth = () => {
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// ✅ CHANGED: Use useState for SSR compatibility
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const user = useState<User | null>('auth.user', () => null);
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// ❌ OLD: const user = ref<User | null>(null);
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// This caused hydration mismatches between server/client
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```
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**Why this works:**
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- ✅ `useState` ensures consistent state between server and client
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- ❌ Prevents hydration mismatches that caused loops
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- ✅ Proper SSR/SPA compatibility
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## 🎯 **KEY PRINCIPLES APPLIED**
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### **1. Single Responsibility**
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- **Middleware**: Handles auth checks and redirects
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- **Components**: Handle UI and user interactions only
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- **Plugins**: Initialize auth state on app startup
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### **2. Eliminate Race Conditions**
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- ❌ No multiple auth checks running simultaneously
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- ✅ Clear order: Plugin → Middleware → Component lifecycle
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- ✅ Each layer trusts the previous layer's work
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### **3. SSR Compatibility**
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- ❌ No top-level async operations in components
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- ✅ Use `onMounted` for client-side only operations
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- ✅ Use `useState` for consistent server/client state
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### **4. Proper Middleware Usage**
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- **Login page**: Uses `guest` middleware (redirects authenticated users)
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- **Dashboard pages**: Use `auth` middleware (redirects unauthenticated users)
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- **No conflicting checks** in component lifecycle hooks
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## 📊 **THE AUTHENTICATION FLOW NOW**
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### **Happy Path - User Logs In:**
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1. **Visit `/`** → Loading screen → Routes to `/login` (if not authenticated)
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2. **Login Page** → Guest middleware allows access → User enters credentials
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3. **Login Success** → Server sets cookie → Routes to `/dashboard`
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4. **Dashboard Index** → Auth middleware verifies → Routes to `/dashboard/user`
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5. **User Dashboard** → Loads successfully ✅
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### **Already Authenticated User:**
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1. **Plugin** → Checks auth → Sets user state
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2. **Visit `/`** → Routes to `/dashboard`
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3. **Dashboard Index** → Auth middleware passes → Routes to `/dashboard/user`
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4. **User Dashboard** → Loads successfully ✅
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### **Unauthenticated User Tries Dashboard:**
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1. **Visit `/dashboard`** → Auth middleware → Redirects to `/login`
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2. **Login Page** → Guest middleware allows access
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3. **User can login** ✅
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### **Authenticated User Visits Login:**
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1. **Visit `/login`** → Guest middleware → Redirects to `/dashboard`
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2. **Dashboard loads** ✅
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## 🎉 **WHAT THIS FIXES**
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### **Before Fix ❌**
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- Endless redirect loops between login/dashboard
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- White screens during navigation
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- SSR/hydration mismatches
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- Race conditions between auth checks
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- Inconsistent behavior across devices
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### **After Fix ✅**
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- Clean, predictable auth flow
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- No redirect loops
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- Proper SSR/SPA compatibility
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- Single source of truth for auth state
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- Consistent behavior across all platforms
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## 📋 **FILES MODIFIED**
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1. **`pages/index.vue`** - Removed top-level navigation, added client-side routing
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2. **`pages/login.vue`** - Added guest middleware, removed duplicate auth check
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3. **`pages/dashboard/index.vue`** - Removed duplicate auth check, simplified routing
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4. **`composables/useAuth.ts`** - Changed to useState for SSR compatibility
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## 🔧 **TESTING CHECKLIST**
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### **Desktop Testing:**
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- [ ] Visit `/` → Should load and route properly
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- [ ] Login with valid credentials → Should redirect to dashboard
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- [ ] Already authenticated → Should skip login page
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- [ ] Unauthenticated dashboard access → Should redirect to login
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### **Mobile Testing:**
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- [ ] All above scenarios work on mobile browsers
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- [ ] No redirect loops in iOS Safari
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- [ ] Smooth navigation between pages
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### **Server Logs:**
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- [ ] No excessive session API calls
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- [ ] Clean authentication flow logs
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- [ ] No error messages about hydration
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## 🎯 **SUCCESS CRITERIA**
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✅ **No more redirect loops between `/login` and `/dashboard`**
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✅ **Clean authentication flow on all devices**
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✅ **Proper SSR/SPA compatibility**
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✅ **Consistent user experience**
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✅ **Maintainable, single-responsibility code**
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The authentication system now works reliably with a clear, predictable flow that eliminates all race conditions and conflicts! 🚀
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@ -1,7 +1,8 @@
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import type { User } from '~/utils/types';
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export const useAuth = () => {
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const user = ref<User | null>(null);
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// Use useState for SSR compatibility - prevents hydration mismatches
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const user = useState<User | null>('auth.user', () => null);
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const isAuthenticated = computed(() => !!user.value);
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const loading = ref(false);
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const error = ref<string | null>(null);
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@ -18,35 +18,26 @@
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<script setup lang="ts">
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definePageMeta({
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middleware: 'auth'
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middleware: 'auth',
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layout: 'dashboard'
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});
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const { user, userTier, isAuthenticated, checkAuth } = useAuth();
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const { user, userTier } = useAuth();
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const loading = ref(true);
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const authChecked = ref(false);
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// Check authentication on mount
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onMounted(async () => {
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console.log('🔄 Dashboard mounted, checking authentication...');
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// Route to tier-specific dashboard - auth middleware ensures user is authenticated
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onMounted(() => {
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console.log('🔄 Dashboard mounted, routing to tier-specific page...');
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// Ensure auth is checked before routing
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await checkAuth();
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authChecked.value = true;
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console.log('✅ Auth check complete:', {
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isAuthenticated: isAuthenticated.value,
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user: user.value?.email,
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tier: userTier.value
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});
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// Now route based on auth status
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if (isAuthenticated.value && user.value) {
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// Auth middleware has already verified authentication - just route to tier page
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if (user.value && userTier.value) {
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const tierRoute = `/dashboard/${userTier.value}`;
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console.log('🔄 Routing to tier-specific dashboard:', tierRoute);
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await navigateTo(tierRoute, { replace: true });
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navigateTo(tierRoute, { replace: true });
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} else {
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console.log('🔄 User not authenticated, redirecting to login');
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await navigateTo('/login');
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console.warn('❌ No user or tier found - this should not happen after auth middleware');
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// Fallback - middleware should have caught this
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navigateTo('/login');
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}
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loading.value = false;
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<template>
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<div>
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<!-- Redirect to dashboard if authenticated, otherwise to login -->
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<div class="loading-container">
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<v-container fluid class="fill-height">
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<v-row justify="center" align="center">
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<v-col cols="auto" class="text-center">
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<v-progress-circular
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indeterminate
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color="primary"
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size="64"
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width="6"
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/>
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<p class="mt-4 text-h6">Loading...</p>
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</v-col>
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</v-row>
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</v-container>
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</div>
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</template>
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<script setup lang="ts">
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const { isAuthenticated } = useAuth();
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// NO top-level navigation - this causes SSR issues and loops!
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// Let middleware and lifecycle hooks handle routing properly
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// Redirect based on authentication status
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await navigateTo(isAuthenticated.value ? '/dashboard' : '/login');
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onMounted(() => {
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const { isAuthenticated } = useAuth();
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// Route after component is mounted (client-side only)
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if (isAuthenticated.value) {
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navigateTo('/dashboard');
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} else {
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navigateTo('/login');
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}
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});
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</script>
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<style scoped>
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.loading-container {
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min-height: 100vh;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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</style>
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@ -122,7 +122,8 @@
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<script setup lang="ts">
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definePageMeta({
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layout: false
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layout: false,
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middleware: 'guest' // This prevents authenticated users from accessing login
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});
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// Use the auth composable
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@ -205,17 +206,9 @@ const handlePasswordResetSuccess = (message: string) => {
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console.log('Password reset:', message);
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};
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// Check auth and auto-focus on mount
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onMounted(async () => {
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// Check if user is already authenticated (client-side only)
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const isAuthenticated = await checkAuth();
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if (isAuthenticated && user.value) {
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console.log('🔄 User already authenticated, redirecting to dashboard');
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await navigateTo('/dashboard');
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return;
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}
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// Auto-focus username field
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// Auto-focus on mount - guest middleware handles auth redirects
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onMounted(() => {
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// Only auto-focus, no auth check needed - guest middleware handles it
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nextTick(() => {
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const usernameField = document.querySelector('input[type="text"]') as HTMLInputElement;
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if (usernameField) {
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