Update app.py

app.py

@@ -1,64 +1,37 @@
-from shiny import App, render, ui
-from flask import Flask, redirect, url_for, session
-from authlib.integrations.flask_client import OAuth
-
-app = Flask(__name__)
-app.secret_key = 'your_secret_key'
-
-oauth = OAuth(app)
-google = oauth.register(
-    name='google',
-    client_id='your_client_id',
-    client_secret='your_client_secret',
-    authorize_url='https://accounts.google.com/o/oauth2/auth',
-    access_token_url='https://accounts.google.com/o/oauth2/token',
-    access_token_params=None,
-    refresh_token_url=None,
-    client_kwargs={'scope': 'openid email profile'},
+from shiny import App, ui, reactive, render, Session
+from google_auth_oauthlib.flow import InstalledAppFlow
+import os
+
+# Google OAuth Configuration
+CLIENT_SECRETS_FILE = "client_secrets.json"
+SCOPES = ['https://www.googleapis.com/auth/userinfo.email', 'https://www.googleapis.com/auth/userinfo.profile']
+os.environ['OAUTHLIB_INSECURE_TRANSPORT'] = '1'  # Enable non-HTTPS for local testing
+
+def authenticate_user():
+    """Perform user authentication via Google OAuth and return user info."""
+    flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRETS_FILE, SCOPES)
+    creds = flow.run_local_server(port=0)
+    user_info = creds.id_token
+    return user_info
+
+app_ui = ui.page_fluid(
+    ui.layout_sidebar(
+        ui.sidebar(
+            ui.input_action_button("login", "Log in with Google"),
+        ),
+        ui.output_text_verbatim("username", placeholder="Username will appear here after login")
+    )
 )
 
-@app.route('/login')
-def login():
-    redirect_uri = url_for('authorize', _external=True)
-    return google.authorize_redirect(redirect_uri)
-
-@app.route('/authorize')
-def authorize():
-    token = google.authorize_access_token()
-    user = google.parse_id_token(token)
-    session['user'] = user
-    return redirect('/')
-
-@app.route('/logout')
-def logout():
-    del session['user']
-    return redirect('/')
+def server(input: Inputs, output: Outputs, session: Session):
+    @output
+    @render.text
+    def username():
+        if input.login() == 1:
+            user_info = authenticate_user()
+            return f"Username: {user_info['email']}"
 
-@app.route('/')
-def index():
-    user = session.get('user')
-    if user:
-        username = user['name']
-    else:
-        username = "Guest"
-    return f'Hello, {username}!'
-
-@app.route('/get_username')
-def get_username():
-    user = session.get('user')
-    if user:
-        return user['name']
-    else:
-        return "Guest"
-
-# Create shiny-python app
-shiny_app = App(
-    ui.title("Shiny with Flask Example"),
-    ui.page(
-        ui.iframe("/flask", height="500px")
-    ),
-    render.FlexDashboard("flex_dashboard", title="Google OAuth Example"),
-    FlaskApp(app)
-)
+app = App(app_ui, server)
 
-shiny_app.serve()
+if __name__ == "__main__":
+    app.run()