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Stuck implementing Cognito Federated Authentication for a Web App using Lambda, API Gateway, and Twitter
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| module.exports.handler = function (event, context, callback) { | |
| let body = ` | |
| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Serverless Home</title> | |
| <style> | |
| .hidden { | |
| display: none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>Lambda, API Gateway, and Cognito</h1> | |
| <h2>Federated Authentication with Twitter</h2> | |
| <div class="hidden" id="login-panel"> | |
| <a href="/dev/api/auth/twitter">Login with your Twitter account</a> | |
| </div> | |
| <div class="hidden" id="logout-panel"> | |
| <a href="/dev/api/auth/logout">Logout</a> | |
| </div> | |
| <div class="hidden" id="profile-panel"> | |
| <p> | |
| Your email address is: <span id="email-address"></span>. | |
| </p> | |
| </div> | |
| <script src="https://code.jquery.com/jquery-3.2.1.min.js"></script> | |
| <script> | |
| function isLoggedIn() { | |
| // TODO: Implement | |
| return false; | |
| } | |
| function getEmailAddress() { | |
| // TODO: Implement | |
| return '???'; | |
| } | |
| $(document).ready(function() { | |
| if (isLoggedIn()) { | |
| $("#email-address").text(getEmailAddress()); | |
| $("#logout-panel").removeClass('hidden'); | |
| $("#profile-panel").removeClass('hidden'); | |
| } else { | |
| $("#login-panel").removeClass('hidden'); | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> | |
| `; | |
| callback(null, body); | |
| }; |
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| 'use strict'; | |
| let oauth = require('oauth'); | |
| let CONSUMER_KEY = 'USE YOUR CONSUMER KEY'; | |
| let CONSUMER_SECRET = 'USE YOUR CONSUMER SECRET'; | |
| module.exports.handler = function (event, context, callback) { | |
| let oa = new oauth.OAuth( | |
| 'https://api.twitter.com/oauth/request_token', | |
| 'https://api.twitter.com/oauth/access_token', | |
| CONSUMER_KEY, | |
| CONSUMER_SECRET, | |
| '1.0A', | |
| null, | |
| 'HMAC-SHA1' | |
| ); | |
| oa.getOAuthRequestToken( | |
| function (error, oAuthToken, oAuthTokenSecret, results) { | |
| if (error) { | |
| console.log(`Error: ${JSON.stringify(error)}`); | |
| callback(error, null); | |
| } else { | |
| // Do not log token and token secret in real-world scenarios | |
| console.log({ | |
| oAuthToken: oAuthToken, | |
| oAuthTokenSecret: oAuthTokenSecret, | |
| results: results | |
| }); | |
| let response = { | |
| statusCode: 302, | |
| headers: { | |
| 'Location': `https://api.twitter.com/oauth/authenticate?oauth_token=${oAuthToken}` | |
| } | |
| }; | |
| callback(null, response); | |
| } | |
| } | |
| ); | |
| }; |
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| service: twitter-auth-service | |
| provider: | |
| name: aws | |
| runtime: nodejs6.10 | |
| functions: | |
| # Home page | |
| home: | |
| handler: home.handler | |
| events: | |
| - http: | |
| method: get | |
| path: index.html | |
| integration: lambda | |
| response: | |
| headers: | |
| Content-Type: "'text/html'" | |
| template: $input.path('$') | |
| # Redirect user to Twitter | |
| obtainRequestToken: | |
| handler: obtain-request-token.handler | |
| events: | |
| - http: | |
| path: api/auth/twitter | |
| method: get | |
| cors: | |
| origins: | |
| - '*' | |
| # Twitter redirects back to here | |
| authCallback: | |
| handler: auth-callback.handler | |
| events: | |
| - http: | |
| path: api/auth/twitter/callback | |
| method: get | |
| cors: | |
| origins: | |
| - '*' |
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