WIP: Explore using a service worker to pass ID tokens

.prettierrc.json

@@ -5,4 +5,4 @@
   "singleQuote": true,
   "tabWidth": 2,
   "trailingComma": "es5"
-}
+}

example-app-router/.env.local.example

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+# Copy this file as ".env.local".
+# Update these with your Firebase app's values.
+NEXT_PUBLIC_FIREBASE_PUBLIC_API_KEY=MyExampleAppAPIKey123
+NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=my-example-app.firebaseapp.com
+NEXT_PUBLIC_FIREBASE_PROJECT_ID=my-example-app-id

example-app-router/.eslintrc.js

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+module.exports = {
+  extends: 'next/core-web-vitals'
+}

example-app-router/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+# Built service worker
+public/service-worker.js

example-app-router/README.md

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+
+## Using Service Worker for Auth
+
+This is a proof of concept for using a service worker to send ID tokens to server-rendered pages. See [this issue](https://github.com/gladly-team/next-firebase-auth/issues/287) and [Firebase docs](https://firebase.google.com/docs/auth/web/service-worker-sessions).
+
+### General flow:
+1. On the auth page, register the service worker, which initializes Firebase, sets up request interception, and will save the authed user.
+2. On future requests, the service worker gets the ID token (refreshing if needed) and adds it as a request header.
+3. Middleware on the server receives the ID token, verifies it, and gets the user. We add the user to auth context.
+
+### WIP Notes
+To develop at the moment:
+1. Run this app to register the service worker on localhost 
+2. Auth in another app on localhost, since auth is not yet set up here
+3. Return to this app
+4. Inspect requests to see SW-added headers
+
+
+### To Do
+1. Add middlware to get the user from the ID token server-side
+2. Pass user to auth provider (server component)
+3. Clean up service worker: remove unneeded logic, maybe use Workbox, make sure types aren't erroring
+4. Add auth to this example
+5. Move code into NFA under unstable APIs
+6. Clean up this example: get parent ESLint config working
+7. Later: see if the middleware can also support existing cookies (see [issue](https://github.com/gladly-team/next-firebase-auth/issues/418#issuecomment-1203655282)). This way, developers with apps on the edge could use either cookies (no ID token) or integrate a service worker.

example-app-router/app/api/thing/route.ts

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+import { NextResponse } from "next/server"
+
+export async function GET(request: Request) {
+  console.log('GET /api/thing')
+  return new Response(JSON.stringify({ foo: 'bar' }), {
+      status: 200,
+    })
+}

example-app-router/app/globals.css

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+:root {
+  --max-width: 1100px;
+  --border-radius: 12px;
+  --font-mono: ui-monospace, Menlo, Monaco, 'Cascadia Mono', 'Segoe UI Mono',
+    'Roboto Mono', 'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro',
+    'Fira Mono', 'Droid Sans Mono', 'Courier New', monospace;
+
+  --foreground-rgb: 0, 0, 0;
+  --background-start-rgb: 214, 219, 220;
+  --background-end-rgb: 255, 255, 255;
+
+  --primary-glow: conic-gradient(
+    from 180deg at 50% 50%,
+    #16abff33 0deg,
+    #0885ff33 55deg,
+    #54d6ff33 120deg,
+    #0071ff33 160deg,
+    transparent 360deg
+  );
+  --secondary-glow: radial-gradient(
+    rgba(255, 255, 255, 1),
+    rgba(255, 255, 255, 0)
+  );
+
+  --tile-start-rgb: 239, 245, 249;
+  --tile-end-rgb: 228, 232, 233;
+  --tile-border: conic-gradient(
+    #00000080,
+    #00000040,
+    #00000030,
+    #00000020,
+    #00000010,
+    #00000010,
+    #00000080
+  );
+
+  --callout-rgb: 238, 240, 241;
+  --callout-border-rgb: 172, 175, 176;
+  --card-rgb: 180, 185, 188;
+  --card-border-rgb: 131, 134, 135;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --foreground-rgb: 255, 255, 255;
+    --background-start-rgb: 0, 0, 0;
+    --background-end-rgb: 0, 0, 0;
+
+    --primary-glow: radial-gradient(rgba(1, 65, 255, 0.4), rgba(1, 65, 255, 0));
+    --secondary-glow: linear-gradient(
+      to bottom right,
+      rgba(1, 65, 255, 0),
+      rgba(1, 65, 255, 0),
+      rgba(1, 65, 255, 0.3)
+    );
+
+    --tile-start-rgb: 2, 13, 46;
+    --tile-end-rgb: 2, 5, 19;
+    --tile-border: conic-gradient(
+      #ffffff80,
+      #ffffff40,
+      #ffffff30,
+      #ffffff20,
+      #ffffff10,
+      #ffffff10,
+      #ffffff80
+    );
+
+    --callout-rgb: 20, 20, 20;
+    --callout-border-rgb: 108, 108, 108;
+    --card-rgb: 100, 100, 100;
+    --card-border-rgb: 200, 200, 200;
+  }
+}
+
+* {
+  box-sizing: border-box;
+  padding: 0;
+  margin: 0;
+}
+
+html,
+body {
+  max-width: 100vw;
+  overflow-x: hidden;
+}
+
+body {
+  color: rgb(var(--foreground-rgb));
+  background: linear-gradient(
+      to bottom,
+      transparent,
+      rgb(var(--background-end-rgb))
+    )
+    rgb(var(--background-start-rgb));
+}
+
+a {
+  color: inherit;
+  text-decoration: none;
+}
+
+@media (prefers-color-scheme: dark) {
+  html {
+    color-scheme: dark;
+  }
+}

example-app-router/app/layout.tsx

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+import './globals.css'
+import type { Metadata } from 'next'
+import { Inter } from 'next/font/google'
+
+const inter = Inter({ subsets: ['latin'] })
+
+export const metadata: Metadata = {
+  title: 'Create Next App',
+  description: 'Generated by create next app',
+}
+
+export default function RootLayout({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  return (
+    <html lang="en">
+      <body className={inter.className}>{children}</body>
+    </html>
+  )
+}