Serverless GitHub login

A simple Lambda function deployed to AWS with Serverless Framework that allows implementing the GitHub OAuth Web Application Flow.

Usage

• Update the org field on the serverless.yml
• Create the variables in AWS Systems Manager Parameter Store:
  • /github-login/dev/clientId OAuth client id for development app, type String
  • /github-login/prod/clientId OAuth client id for production app, type String
  • /github-login/dev/clientSecret OAuth client secret for development app, type SecureString
  • /github-login/prod/clientSecret OAuth client secret for production app, type SecureString
• Deploy:
  • serverless deploy --stage prod
  • serverless deploy --stage dev

From your client side you can now exchange the code for the token. For more information check GitHub's documentation.

var code = window.location.href.match(/\?code=(.*)/)[1];

fetch(`${YOUR_AWS_URL}/login`, {
    method: "POST",
    body: JSON.stringify({
      code
    })
  })