v0 and Google Classroom integration: Step-by-Step Guide 2025

 

Prerequisites and Manual Dependency Setup

 

• Create a Google Cloud project and enable the Google Classroom API via the Google Developer Console.
• Obtain your OAuth 2.0 Client ID, Client Secret, and set an authorized redirect URI (for example: http://localhost:3000/auth/google/callback).
• Since v0 does not have a terminal, manually create or update your package.json file in the root directory of your project with the required dependencies.

{
  "name": "v0-project",
  "version": "1.0.0",
  "dependencies": {
    "googleapis": "^105.0.0",
    "express": "^4.18.2"
  }
}

 

Creating the Google Authentication File

 

• Create a new file named googleAuth.ts in your project’s source directory.
• This file will set up the OAuth2 client that connects with Google’s authentication service. Replace YOURCLIENTID, YOURCLIENTSECRET, and YOURREDIRECTURI with the values from your Google Developer Console.

import { google } from 'googleapis';

const CLIENTID = 'YOURCLIENT_ID';
const CLIENTSECRET = 'YOURCLIENT_SECRET';
const REDIRECTURI = 'YOURREDIRECT_URI';

const oAuth2Client = new google.auth.OAuth2(
  CLIENT_ID,
  CLIENT_SECRET,
  REDIRECT_URI
);

export default oAuth2Client;

 

Creating the Google Classroom Integration File

 

• Create a new file called googleClassroom.ts in your source folder.
• This file will contain functions that interact with the Google Classroom API. Here is an example to list courses.

import { google } from 'googleapis';
import oAuth2Client from './googleAuth';

const classroom = google.classroom({ version: 'v1', auth: oAuth2Client });

export async function listCourses() {
  try {
    const res = await classroom.courses.list();
    console.log('Courses:', res.data.courses);
    return res.data.courses;
  } catch (error) {
    console.error('Error listing courses:', error);
  }
}

 

Setting Up the OAuth Callback Route with Express

 

• Create a new file named authRoutes.ts in your project’s source directory.
• This file will handle the OAuth callback from Google and exchange the authorization code for access tokens.

import express from 'express';
import oAuth2Client from './googleAuth';

const router = express.Router();

router.get('/auth/google/callback', async (req, res) => {
  const code = req.query.code;
  if (!code) {
    return res.send('No code provided');
  }
  try {
    const { tokens } = await oAuth2Client.getToken(code as string);
    oAuth2Client.setCredentials(tokens);
    res.send('Authentication successful! You can now use the Classroom API.');
  } catch (error) {
    console.error('Error retrieving access token', error);
    res.send('Authentication failed');
  }
});

export default router;

 

Modifying the Main Server File

 

• If your v0 project already has a main file (for example, main.ts), update it to import and use the Express server and the newly created OAuth route.
• If no main file exists, create one named main.ts in your source folder. This file initializes the Express server and sets up a route to trigger the OAuth flow as well as a test route to call the Google Classroom API.

import express from 'express';
import authRoutes from './authRoutes';
import { listCourses } from './googleClassroom';

const app = express();

// Mount OAuth callback handler
app.use(authRoutes);

// A route to start OAuth flow by redirecting the user to Google's consent screen
app.get('/auth/google', (req, res) => {
  const oAuth2Client = require('./googleAuth').default;
  const authUrl = oAuth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: ['https://www.googleapis.com/auth/classroom.courses.readonly']
  });
  res.redirect(authUrl);
});

// A sample route to list Google Classroom courses after authentication
app.get('/courses', async (req, res) => {
  const courses = await listCourses();
  res.json(courses);
});

app.listen(3000, () => {
  console.log('Server running on http://localhost:3000');
});

 

Using the Integration

 

• To begin authenticating, direct your browser to http://localhost:3000/auth/google. This will redirect you to the Google consent screen.
• After successful authentication, Google will redirect to /auth/google/callback, complete the token exchange, and allow you to use the Classroom API.
• You can then visit http://localhost:3000/courses to list your Google Classroom courses.