auth demo: using storage instead of query parameter

examples/authentication/main.py

@@ -28,7 +28,8 @@ class AuthMiddleware(BaseHTTPMiddleware):
     async def dispatch(self, request: Request, call_next):
         if not app.storage.user.get('authenticated', False):
             if request.url.path in nicegui.globals.page_routes.values() and request.url.path not in unrestricted_page_routes:
-                return RedirectResponse(f'/login?referrer_path={quote(request.url.path)}')
+                app.storage.user['referrer_path'] = request.url.path  # remember where the user wanted to go
+                return RedirectResponse('/login')
         return await call_next(request)
 
 
@@ -48,11 +49,11 @@ def test_page() -> None:
 
 
 @ui.page('/login')
-def login(referrer_path: str = '') -> Optional[RedirectResponse]:
+def login() -> Optional[RedirectResponse]:
     def try_login() -> None:  # local function to avoid passing username and password as arguments
         if passwords.get(username.value) == password.value:
             app.storage.user.update({'username': username.value, 'authenticated': True})
-            ui.open(referrer_path or '/')
+            ui.open(app.storage.user.get('referrer_path', '/'))  # go back to where the user wanted to go
         else:
             ui.notify('Wrong username or password', color='negative')