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https://github.com/Monadical-SAS/reflector.git
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refactor: migrate from @hey-api/openapi-ts to openapi-react-query
- Replace @hey-api/openapi-ts with openapi-typescript and openapi-react-query - Generate TypeScript types from OpenAPI spec - Set up React Query infrastructure with QueryClientProvider - Migrate all API hooks to use React Query patterns - Maintain backward compatibility for existing components - Remove old API infrastructure and dependencies
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www/REDIS-FREE-AUTH.md
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354
www/REDIS-FREE-AUTH.md
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# Redis-Free Authentication Solution for Reflector
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## Problem Analysis
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### The Multi-Tab Race Condition
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The current implementation uses Redis to solve a specific problem:
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- NextAuth's `useSession` hook broadcasts `getSession` events across all open tabs
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- When a token expires, all tabs simultaneously try to refresh it
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- Multiple refresh attempts with the same refresh_token cause 400 errors
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- Redis + Redlock ensures only one refresh happens at a time
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### Root Cause
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The issue stems from **client-side broadcasting**, not from NextAuth itself. The `useSession` hook creates a BroadcastChannel that syncs sessions across tabs, triggering the race condition.
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## Solution: Middleware-Based Token Refresh
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Move token refresh from client-side to server-side middleware, eliminating broadcasting and race conditions entirely.
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### Implementation
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#### 1. Enhanced Middleware (`middleware.ts`)
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```typescript
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import { withAuth } from "next-auth/middleware";
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import { getToken } from "next-auth/jwt";
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import { encode } from "next-auth/jwt";
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import { NextResponse } from "next/server";
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import { getConfig } from "./app/lib/configProvider";
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const REFRESH_THRESHOLD = 60 * 1000; // 60 seconds before expiry
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async function refreshAccessToken(token: JWT): Promise<JWT> {
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try {
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const response = await fetch(process.env.AUTHENTIK_REFRESH_TOKEN_URL!, {
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method: "POST",
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headers: {
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"Content-Type": "application/x-www-form-urlencoded",
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},
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body: new URLSearchParams({
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client_id: process.env.AUTHENTIK_CLIENT_ID!,
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client_secret: process.env.AUTHENTIK_CLIENT_SECRET!,
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grant_type: "refresh_token",
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refresh_token: token.refreshToken as string,
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}),
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});
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if (!response.ok) throw new Error("Failed to refresh token");
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const refreshedTokens = await response.json();
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return {
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...token,
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accessToken: refreshedTokens.access_token,
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accessTokenExpires: Date.now() + refreshedTokens.expires_in * 1000,
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refreshToken: refreshedTokens.refresh_token || token.refreshToken,
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};
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} catch (error) {
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return { ...token, error: "RefreshAccessTokenError" };
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}
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}
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export default withAuth(
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async function middleware(request) {
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const config = await getConfig();
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const pathname = request.nextUrl.pathname;
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// Feature flag checks (existing)
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if (
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(!config.features.browse && pathname.startsWith("/browse")) ||
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(!config.features.rooms && pathname.startsWith("/rooms"))
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) {
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return NextResponse.redirect(request.nextUrl.origin);
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}
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// Token refresh logic (new)
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const token = await getToken({ req: request });
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if (token && token.accessTokenExpires) {
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const timeUntilExpiry = (token.accessTokenExpires as number) - Date.now();
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// Refresh if within threshold and not already expired
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if (timeUntilExpiry > 0 && timeUntilExpiry < REFRESH_THRESHOLD) {
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try {
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const refreshedToken = await refreshAccessToken(token);
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if (!refreshedToken.error) {
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// Encode new token
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const newSessionToken = await encode({
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secret: process.env.NEXTAUTH_SECRET!,
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token: refreshedToken,
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maxAge: 30 * 24 * 60 * 60, // 30 days
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});
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// Update cookie
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const response = NextResponse.next();
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response.cookies.set({
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name:
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process.env.NODE_ENV === "production"
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? "__Secure-next-auth.session-token"
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: "next-auth.session-token",
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value: newSessionToken,
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httpOnly: true,
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secure: process.env.NODE_ENV === "production",
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sameSite: "lax",
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});
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return response;
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}
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} catch (error) {
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console.error("Token refresh in middleware failed:", error);
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}
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}
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}
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return NextResponse.next();
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},
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{
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callbacks: {
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async authorized({ req, token }) {
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const config = await getConfig();
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if (
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config.features.requireLogin &&
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PROTECTED_PAGES.test(req.nextUrl.pathname)
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) {
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return !!token;
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}
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return true;
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},
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},
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},
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);
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```
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#### 2. Simplified auth.ts (No Redis)
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```typescript
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import { AuthOptions } from "next-auth";
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import AuthentikProvider from "next-auth/providers/authentik";
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import { JWT } from "next-auth/jwt";
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import { JWTWithAccessToken, CustomSession } from "./types";
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const PRETIMEOUT = 60; // seconds before token expires
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export const authOptions: AuthOptions = {
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providers: [
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AuthentikProvider({
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clientId: process.env.AUTHENTIK_CLIENT_ID as string,
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clientSecret: process.env.AUTHENTIK_CLIENT_SECRET as string,
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issuer: process.env.AUTHENTIK_ISSUER,
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authorization: {
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params: {
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scope: "openid email profile offline_access",
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},
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},
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}),
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],
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session: {
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strategy: "jwt",
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maxAge: 30 * 24 * 60 * 60, // 30 days
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},
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callbacks: {
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async jwt({ token, account, user }) {
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// Initial sign in
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if (account && user) {
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return {
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...token,
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accessToken: account.access_token,
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accessTokenExpires: (account.expires_at as number) * 1000,
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refreshToken: account.refresh_token, // Store in JWT
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} as JWTWithAccessToken;
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}
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// Return token as-is (refresh happens in middleware)
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return token;
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},
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async session({ session, token }) {
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const extendedToken = token as JWTWithAccessToken;
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const customSession = session as CustomSession;
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customSession.accessToken = extendedToken.accessToken;
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customSession.accessTokenExpires = extendedToken.accessTokenExpires;
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customSession.error = extendedToken.error;
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customSession.user = {
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id: extendedToken.sub,
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name: extendedToken.name,
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email: extendedToken.email,
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};
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return customSession;
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},
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},
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};
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```
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#### 3. Remove Client-Side Auto-Refresh
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**Delete:** `app/lib/SessionAutoRefresh.tsx`
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**Update:** `app/lib/SessionProvider.tsx`
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```typescript
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"use client";
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import { SessionProvider as SessionProviderNextAuth } from "next-auth/react";
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export default function SessionProvider({ children }) {
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return (
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<SessionProviderNextAuth>
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{children}
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</SessionProviderNextAuth>
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);
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}
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```
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### Alternative: Client-Side Deduplication (If Keeping useSession)
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If you need to keep client-side session features, implement request deduplication:
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```typescript
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// app/lib/deduplicatedSession.ts
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let refreshPromise: Promise<any> | null = null;
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export async function deduplicatedRefresh() {
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if (!refreshPromise) {
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refreshPromise = fetch("/api/auth/session", {
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method: "GET",
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}).finally(() => {
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refreshPromise = null;
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});
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}
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return refreshPromise;
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}
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// Modified SessionAutoRefresh.tsx
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export function SessionAutoRefresh({ children }) {
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const { data: session } = useSession();
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useEffect(() => {
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const interval = setInterval(async () => {
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if (shouldRefresh(session)) {
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await deduplicatedRefresh(); // Use deduplicated call
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}
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}, 20000);
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return () => clearInterval(interval);
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}, [session]);
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return children;
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}
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```
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## Benefits of Middleware Approach
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### Advantages
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1. **No Race Conditions**: Each request handled independently server-side
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2. **No Redis Required**: Eliminates infrastructure dependency
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3. **No Broadcasting**: No multi-tab synchronization issues
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4. **Automatic**: Refreshes on navigation, no polling needed
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5. **Simpler**: Less client-side complexity
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6. **Performance**: No unnecessary API calls from multiple tabs
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### Trade-offs
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1. **Long-lived pages**: Won't refresh without navigation
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- Mitigation: Keep minimal client-side refresh for critical pages
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2. **Server load**: Each request checks token
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- Mitigation: Only checks protected routes
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3. **Cookie size**: Refresh token stored in JWT
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- Acceptable: ~200-300 bytes increase
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## Migration Path
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### Phase 1: Implement Middleware Refresh
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1. Update middleware.ts with token refresh logic
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2. Test with existing Redis-based auth.ts
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3. Verify refresh works on navigation
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### Phase 2: Remove Redis
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1. Update auth.ts to store refresh_token in JWT
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2. Remove Redis/Redlock imports
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3. Test multi-tab scenarios
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### Phase 3: Optimize Client-Side
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1. Remove SessionAutoRefresh if not needed
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2. Or implement deduplication for long-lived pages
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3. Update documentation
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## Testing Checklist
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- [ ] Single tab: Token refreshes before expiry
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- [ ] Multiple tabs: No 400 errors on refresh
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- [ ] Long session: 30-day refresh token works
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- [ ] Failed refresh: Graceful degradation
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- [ ] Protected routes: Still require authentication
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- [ ] Feature flags: Still work as expected
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## Configuration
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### Environment Variables
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```bash
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# Required (same as before)
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AUTHENTIK_CLIENT_ID=xxx
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AUTHENTIK_CLIENT_SECRET=xxx
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AUTHENTIK_ISSUER=https://auth.example.com/application/o/reflector/
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AUTHENTIK_REFRESH_TOKEN_URL=https://auth.example.com/application/o/token/
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NEXTAUTH_URL=http://localhost:3000
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NEXTAUTH_SECRET=xxx
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# NOT Required anymore
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# KV_URL=redis://... (removed)
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```
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### Docker Compose
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```yaml
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version: "3.8"
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services:
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# No Redis needed!
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frontend:
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build: .
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ports:
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- "3000:3000"
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environment:
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- AUTHENTIK_CLIENT_ID=${AUTHENTIK_CLIENT_ID}
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- AUTHENTIK_CLIENT_SECRET=${AUTHENTIK_CLIENT_SECRET}
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# No KV_URL needed
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```
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## Security Considerations
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1. **Refresh Token in JWT**: Encrypted with A256GCM, secure
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2. **Cookie Security**: HttpOnly, Secure, SameSite flags
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3. **Token Rotation**: Authentik handles rotation on refresh
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4. **Expiry Handling**: Graceful degradation on refresh failure
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## Conclusion
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The middleware-based approach eliminates the multi-tab race condition without Redis by:
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1. Moving refresh logic server-side (no broadcasting)
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2. Handling each request independently (no race)
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3. Updating cookies transparently (no client involvement)
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This solution is simpler, more maintainable, and aligns with NextAuth's evolution toward server-side session management.
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