aws-cognito-demo

AWS Cognito demo

Amazon Cognito is a service that makes it easy to save user data in the AWS Cloud without writing any backend code or managing any infrastructure.

Run locally

Install the dependencies and start the webpack server

$ npm run init

Then open in the browser: http://localhost:3000/

You should expect to see a "Sign-in with Google" button:

Authorize the app

Once authorized you should be re-directed back to the original page where you should see your Google profile:

What's inside

Initialize hello.js with Google ID

Hello.js — it is a client-side library that simplify authenticating.

  hello.init({
    google: '1007282893537-d12afmkgp97mjfa1plp7g4caginmkam9.apps.googleusercontent.com'
  }, {
    redirect_uri: window.location.href
  });

Add listener that triggered whenever a user logs in

  hello.on('auth.login', this.getUserInfo.bind(this));

Add listeners for the user login

Add listener, which will load a user profile into the page after they sign in.

  hello(auth.network).api('/me').then(user => {
    // set user data to the application state
  });

Set configuration for AWS

  AWS.config.region = 'eu-west-1';
  AWS.config.credentials = new AWS.CognitoIdentityCredentials({
    IdentityPoolId: 'eu-west-1:6c92ef81-d98a-4d97-8622-7274a5326309',
    Logins: {
      'accounts.google.com': auth.authResponse.id_token
    }
  });

Connect to AWS and get data from Cognito Cloud

  // get AWS credentials, so we can connect
  AWS.config.credentials.get(() => {
    // connect to cognito
    cognito.client = new AWS.CognitoSyncManager();

    // open or create new dataset
    cognito.client.openOrCreateDataset('DataSet', (err, dataset) => {
      cognito.dataSet = dataset;

      // get data from Cloud by the key
      dataset.get('DataKey', (err, data) => {
        // set data to the application state
      });

    });
  });

Put updated data to the Cognito Cloud

  cognito.dataSet.put('DataKey', 'DataValue', (err, record) => {
    // handler code here
  });

Libraries

• https://github.com/aws/aws-sdk-js - AWS SDK for JavaScript in the browser and Node.js
• https://github.com/aws/amazon-cognito-js - Amazon Cognito Sync Manager for JavaScript
• http://adodson.com/hello.js/ - A client-side JavaScript SDK for authenticating with OAuth2