In this tutorial, we will learn how to implement Google OAuth2.0 authentication in a ReactJS application. We will create a simple ReactJS application that allows users to sign in using their Google account and redirect them to a dashboard page after successful authentication.

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Step 1 : Get Google OAuth Client ID and Client Secret

  1. Go to the Google Developers Console and Create a new project.

  2. Click on the project name and then select APIs & Services on your left sidebar tab. Click on OAuth consent screen and fill in the required details.

    IMPORTANT

    Test users: While your app is in development, you can add test users to your OAuth consent screen. These users will be able to sign in to your app with their Google accounts without needing to verify their identity. You can add test users by clicking on the Add users button in the OAuth consent screen configuration page.

    You will need to verify and move your app to production before it can be used by anyone other than the test users you have added.

  3. Click on Credentials on your left sidebar tab and then click on Create Credentials and select OAuth client ID.

    SERVER CONFIGURATIONS

    ReactJS - http://localhost:3000

    We are using http://localhost:3000 as the ReactJS application URL for this tutorial in Authorized origins. You can replace it with your actual ReactJS application URL when rolling out to production. Example: https://your-reactjs-app.com

    Oauth Callback or Authorized Redirect URI - https://authn.zeromagic.cloud/oauth/callback/

  4. Copy the Client ID and Client Secret and we will use this to setup our authentication in the zeromagic platform.

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Step-2 : Setup Google OAuth in Zeromagic

  1. Create and open a new Project in the console. Add a Database to the project. You can use the database spinned up by Zeromagic or connect your own database. Here we are using the cosmosdb database provided by Zeromagic. To add a database, click on the Create Database on the Database section button and add your database.

    Refer here to know more about: Creating Database on the platform

  2. Create a new environment and map the added database to the environment. Here we are using the development environment and employees database

    Refer here to know more about: Creating Environments on the platform

  3. Add the Google authentication connection under Methods. Click Add Connection to create a new connection with the Client ID and Client Secret you copied from the Google Developers Console.

    Refer here to know more about: Adding Authentication on the platform

  4. Go to Settings section in the dashboard and the Redirect URL. Here the redirect URL is http://localhost:3000/dashboard as we are using the local ReactJS application URL for this tutorial. You can replace it with your actual ReactJS application URL when rolling out to production. Example: https://your-reactjs-app.com. This is the url where the user data response with be appended to the query params after successful authentication.

  5. Now, go to Environments sections and select the environment you created. Copy the Auth Endpoint URL from the environment details. This is your authentication endpoint URL where you will be sending the APi requests. Your Auth endpoint URL looks similar to this:

    The oauth api endpath is /oauth and environment url http://authn.zeromagic.cloud/auth/86165f63f34e4be89809c2948c424a99/development/. So, the final URL will be

    OAuth Endpoint
    http://authn.zeromagic.cloud/auth/86165f63f34e4be89809c2948c424a99/development/oauth

  6. Before making the API request, let’s create a new user credentials in the database for this example. You can skip this step if your preferring to go with registering the user and login with that user credentials.

    While using OAuth, if the email id is not found in the database, the user will be registered with the email id and the user will be logged in. If the email id is found in the database, the user will be logged in.

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Step-3 : Create Login Page and Dashboard Page in ReactJS

Now,let’s create our simple frontend UI using ReactJS. We will create a login page where the user can click on the Google sign-in button and redirect them to the dashboard page after successful authentication.

  1. Create a new React project using the following command.
npx create-react-app googleauth-reactjs
  1. Add this dependency to your project using the following command:
 npm install react-router-dom

  1. Update App.js with the provided code

    App.js
    import './App.css';
import React from 'react';
import { BrowserRouter as Router, Route, Routes } from 'react-router-dom';
import LoginPage from './login';
import DashboardPage from './dashboard';

function App() {
return (
    <Router>
    <Routes>
        <Route path="/" element={<LoginPage />} />
        <Route path="/dashboard" element={<DashboardPage />} />
    </Routes>
    </Router>
);
}

export default App;

    Create login.js file and login.css file for the Login screen.

    Create dashboard.js and dashboard.css file for the Dashboard screen.

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Step-4 : Make the API Request

  1. Replace the {auth_base_url}/oauth in the login.js file with the copied URL from the environment details and with the path to the social google login endpoint. Here the {auth_base_url} is http://authn.zeromagic.cloud/auth/86165f63f34e4be89809c2948c424a99/development/

    Note: Replace the auth_base_url ith your actual URL. The URL is followed by /oauth which is the path to the social google login endpoint.

  2. Replace the {your_app_key} with your actual APP-KEY in the headers of login.js file. You can find the APP-KEY in the Manage -> Settings section of your console. Make sure to add connection_name as google in the body of the API request.

    login.js
        const handleGoogleLogin = async () => {
        try {
        // REPLACE_HERE : Replace the {auth_base_url}/oauth with the copied URL from the environment details and with the path to the social google login endpoint
        const response = await fetch('http://authn.zeromagic.cloud/auth/86165f63f34e4be89809c2948c424a99/development/oauth', {
            method: 'POST',
            headers: {
            'Content-Type': 'application/json',
            'APP-KEY' : 'lwc66BSZmPilT7UnNhlut2QFfRYr82ErXMqCYsKhtFM' // REPLACE_HERE : Replace the {your_app_key} with your actual APP-KEY
            },
            body: JSON.stringify({
            connection_name: 'google',
            }),
        });
    
        if (!response.ok) {
            alert('Failed to authenticate with Google');
            throw new Error('Failed to authenticate with Google');
        }
    
        const data = await response.json();
    
        // Check if the 'authorize_url' exists in the response
        const authorizeUrl = data['BODY']['authorize_url'];
        if (authorizeUrl) {
            // Open the URL in the browser
            window.location.href = authorizeUrl;
        } else {
            console.error('authorize_url not found in response');
        }
        } catch (error) {
        console.error('Error during Google login:', error);
        }
    };

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Step-5 : Run the ReactJS Application

  1. Run the react application using the following command:

    npm start

  2. Open your browser and navigate to http://localhost:3000. You will see the login page with a Google sign-in button.

    Click on the Login with Google button. You will be redirected to the Google sign-in page. Sign in with your Google account.

    On successful, you will be redirected to the dashboard page with the user details.

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Summary

In this tutorial, you learned how to login application with Google OAuth using React JS and Zeromagic authentication API. This is a basic example to get you started with authentication in Zeromagic.

We provide more basic authentication methods and advanced method like social login. Feel free to explore the Authentication API Reference and reach out to us if you have any questions.

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